Assessment of Semi-Active Tunes Mass Damper Application in Suppressing Seismic-Induced Vibration of an Existing Jacket Platform 2 2 In this study, mass, stiffness and damping matrices of the Nosrat jacket; located in Persian Gulf; equipped with Semi Active Tuned Mass Damper (SATMD) system have been derived after modeling the structure in SACS software. Owing to huge number of the degrees of freedom in the model, computation of on-line control of SATMD was time consuming. For this purpose, the size of the model was reduced in the finite time and frequency intervals by programming in MATLAB software. The SATMD utilized in this study, contains a passive Tuned Mass Damper (TMD) and two Magneto Rheological (MR) dampers in order to illustrate the control effect of SATMD. The selected algorithm to control and optimize the performance of MR damper is Linear Quadratic Gaussian (LQG). Time history responses of the platform in cases with and without SATMD have been compared under three different ground motions. Results indicate that jacket equipped with SATMD can dramatically reduce the seismic-induced dynamic responses. 1 10 2017/06/18 1396/3/28 Samira Babaei Samira Babaei University of Qom Iran Samira.Babaei@qom.ac.ir Roohollah Amirabadi Roohollah Amirabadi University of Qom Iran riamirabadi@qom.ac.ir Touraj Taghikhany Touraj Taghikhany Amirkabir University of Technology Iran ttaghikhany@aut.ac.ir Nosrat Jacket Persian Gul SATMD LQG Algorithm Seismic-Induced Responses Chakrabarti, S. (2005), Handbook of Offshore Engineering, Texas, USA: Elsevier Ltd.##Ben, C., and Gerwick, J. (2007), Construction of Marine and Offshore Structures (3rd ed.), CRC Press.##El-Reedy, M. A. (2012), Offshore Structures: Design, Construction and Maintenance, Oxford,UK, USA: Gulf Professional Publishing, Elsevier.##Preumont, A. (2004), Vibration Control of Active Structures: An introduction (2nd Edition), Vol. 96, Brussels, Belgium: Kluwer Academic Publishers.##Chopra, A. (2001), Dynamics of Structures, Theory and Application to Earthquake Engineering (2nd ed.), NewJersey, USA: Prentice-Hall.##Soong, T., and Dargush, G. (1997), Passive Energy Dissipation Systems in Structural Engineering, England: John Wiley and Sons Ltd.##Soong, T. (1990), Active Structural Control: Theory and Practice, New York, USA: Longman Scientific and Technical.##Spencer, B., and Sain Michael, K. (1997), Controlling Buildings : A New Frontier in Feedback, Special Issue of The IEEE Control Systems Magazine on Emerging Technology, Vol.17, 609-631.##Vandiver, J., and Mitome, S. K. (1978), The effect ofLiquid Storage Tanks On The Dynamic Response Of Offshore Platforms, Offshore Technology Conference. Vol.1, p. 67-74. Houiston, Texas: Appl. Ocean Res.##Kawano, K., and Venkataramana, K. (1992), Seismic Response of Offshore Platform with TMD, Proc. of World Conference on Earthquake Engineering, p. 2241-2246.##Kawano, K. (1993), Active Control Effects on Dynamic Response of Offshore Structures, 3rd International Offshore and Polar Engineering Conference, p. 494-498, Singapore: Proc. of 3 ISOPE Conference.##Abdol Rohman, M. (1996), Structural Control of Steel Jacket Platform. Structural Engineering and Mechanics, Vol. 4, p. 25-38.##Lee, H. (1997), Stochastic Analysis for Offshore Structures with Added Mechanical Dampers, Ocean Engineering, Vol. 24(9), p. 817-834.##Suneja, B., and Datta, T. (1998), Active Control of ALP with Improved Performance Function, Ocean Engineering, Vol. 25, p. 817-835.##Suneja, B., and Datta, T. (1999), Nonlinear open-close loop Active Control of Articulated Leg Platform, International Journal of Offshore and Polar Engineering, Vol. 9, p. 141-148.##Gattulli, V., and Ghanem, R. (1999), Adaptive Control of Flow-Induced Oscillation Including Vortex Effects, International Journal of Non-Linear Mechanics, Vol. 34, p. 853-868. doi:10.1016/S0020-7462(98)00058-4##Terro, M., Mahmood, M., and Abdel Rohman, M. (1999), Multi-loop Feedback Control of offshore Steel Jacket Platforms, Computers and Structures, Vol. 70, p. 185-202. doi:10.1016/S0045-7949(98)00152-7##Ou, J., Xiao, Y., Duan, Z., Zou, X., Wu, B., and Wei, J. (2000), Ice-induced vibration control of JZ20-2MUQ platform structure with viscoelastic energy dissipators, The Ocean Engineering, Vol. 18, p. 9-14.##Suhardjo, J., and Kareem, A. (2001), Feedback-feedforward control of offshore platforms under random waves, Earthquake Engineering and Structural Dynamics, Vol. 30, p. 213-235. doi:10.1002/1096-9845(200102)30:2<213::AID-EQE5>3.3.CO;2-W##Wang, s. (2002), Semi-Active Control of Wave-Induced Vibration for Offshore Platforms by Use of MR Damper, International Conference on Offshore Mechanics and Artic Engineering, p. 23-28, Oslo,Norway.##Ou, J., and Yang, Y. (2003), Smart Isolation Systems of Offshore Platform Jacket Structure with Magnetorheological Dampers, doi:cnki:ISSN:1002-0470.0.2003-06-015##Mahadik, A., and Jangid, R. (2003), Active control of offshore Jacket Platform, International Ship Building Progress, p. 277-295.##Li, H. J., James Hu, S.-L., and Jakubiak, C. (2003), H2 active vibration control for offshore platform subjected to wave loading. Journal of Sound and Vibration, Vol. 263(4), p. 709-724.##Ji, C., and Meng, Q. (2004), Optimal Vibration Control Strategy for Offshore Platforms Accounting for AMD Constraints, 23rd International Conference on Offshore Mechanics and Arctic Engineering(OMAE), Vol. 1, p. 17-22. Vancouver, Canada: ASME. doi:10.1115/OMAE2004-51008##Golafshani, A., Tabeshpour, M., and Komachi, Y. (2006), Fixed Offshore Platforms Assessmant and Retrofit Using Adjoint Dampers, 8th Marine Industries Conferense(MIC2006), Boushehr,Iran: CIVILICA.##Golafshani, A., Kashani, M., Gholizad, A., and Dastan, M. (2010), Vibration Control of Offshore Platforms Using Hybrid Dampers, 12th Marine Industries Conference(MIC2010), Zibakenar,Iran: CIVILICA(In Persian).##Yue, Q., Zhang, L., Zhang, W., and Karna, T. (2009), Mitigating Ice-Induced Jacket Platform Vibration Utilizing a TMD System, Cold Region Science and Technology, Vol. 56(2-3), p. 84-89.##Chang, S., Kim, D., Chang, C., and Cho, S. G. (2009), Active Response Control of an offshore Structure under Wave Loads Using a Modified Probabilstic Neural Netwok, Journal of Marine Science and Technology, Vol. 14(2), p. 240-247.##Tabeshpour, M., Dehkharaghanian, V., and Doulatshahi, M. (2010), Effect of Tuned Mass Damperon Vertical Vibration of Tension Leg Platform, MIC2010. Zibakenar,Iran(In Persian).##Tabeshpour, M., Rezaie, E., and Arafati, N. (2011), Response Mitigation of Jacket Platforms Using Tuned Mass Damper, 1st National Conference on Steel Structures, Tehran, Iran (In Persian).##Komachi, Y., Tabeshpour, M., Golafshani, A., and Mualla, I. (2011), Retrofit of Ressalat Jacket Platform (Persian Gulf) Using Friction Damper Device, Journal of Zhejiang University-SCIENCE A (Applied Physics and Engineering), p. 680-691.##Sudip, P., and Datta, T. (2012), Semiactive Control of a fixed Offshore Jacket Platform Using LQR Algorithm, Journal of Engineering for the Maritime Environment, p. 367-380##Taghikhani, T., Ariana, S., Mahammadzadeh, R., and Babaei, S. (2013), The Effect of Semi-Active Controller in Sirri Jacket Seismis Vibration Control under Kobe earthquake. International Journal of Maritime Science and Engineering(ijmase), p. 77-84.##Jafarabad, A., Kashani, M., Adl Parvar, M. R., and Golafshani, A. A. (2014), Hybrid damping systems in offshore jacket platforms with, Journal of Constructional Steel Research, Vol. 98, p. 178-187. Retrieved from http://dx.doi.org/10.1016/j.jcsr.2014.02.004##jaksic, V., Wright, C., Chanayil, A., Ali, S. F., Murphy, J., and Pakrashi, V. (2015), Performance of a Single Liquid Column Damper for the Control of Dynamic Responses of a Tension Leg Platform, 11th International Conference on Damage Assessment of Structures (DAMAS 2015), p. 2-9. IOP Publishing: Journal of Physics: Conference Series 628 (2015) 012058.##Wu, Q., Zhao, X., Zheng, R., and Minagawa, K. (2016), High Response Performance of a Tuned-Mass Damper for Vibration Suppression of Offshore Platform under Earthquake Loads, Shock and Vibration, doi:10.1155/2016/7383679.##Chandrasekaran, S. (2015), Dynamic Analysis and Design of Offshore Structures, Springer India: Ocean Engineering and Oceanography.##API. (2000), Recommended Practice For Designing and Constructing Fixed Offshore Platforms-Working Stress Design, American Petrolium Institute, USA.##Chey, M., Chase, J., Mander, J., and Carr, A. (2009), Semi-active tuned mass damper building systems: Application, Earthquake Engineering and Structural Dynamics. doi:10.1002/eqe.933##Chey, M., Chase, J., Mander, J., and Carr, A. (2009), Semi-active tuned mass damper building systems: Design, Earthquake Engineering and Structural Dynamics.##Feizabadi-Sni, S., and Ghorbani-Tanha, A. (2011), A Novel Semi-Active Tuned Mass Damper and its Application in Vibration, 6th International Conference on Seismology and Earthquake Engineering(SEE6). Tehran,Iran: CIVILICA.##Haskett, T., Breukelman, B., Robinson, J., and Kottelenberg, J. (2003), Tuned mass dampers under excessive structural excitation. Responce of Structures to Extereme Loadin, Boston, London: Elsevier.##Lin, P., Chung, L., and Loh, C. (2005), Semiactive Control of Building Structures with Semiactive Tuned Mass Damper, Computer-Aided Civil and Infrastructure Engineering, Vol. 20(1), p. 35-51, doi:10.1111/j.1467-8667.2005.00375.x##Sadek, F., Mohraz, B., Taylor, A. W., and Chung, R. M. (1997), A Method of Estimating the Parameters of Tuned Mass Dampers for Seismic Applications. Earthquake Engineering and Structural Dynamics, Vol. 26(6), p. 617-635. doi:10.1002/(SICI)1096-9845(199706)26:6<617::AID-EQE664>3.0.CO;2-Z##Antoulas, A., Sorensen, D., and Gugercin, S. (2006), A survey of model reduction methods for large-scale systems. Contemporary Mathematics, p. 193-219.##Gawronski, W. K. (2004), Advanced Structural Dynamics and Active Control of Structures, NewYork, USA: Springer.##Den Hartog, J. P. (1947), Mechanical Vibrations, McGraw-Hill, Inc., New York, N.Y. 48- IOOC, Inplace Analysis of Platform(DP-A), SD-EST-CN-DPAX-1000-D0, 2000.## ##

Residence Times in a Hypersaline Creek: Using Salinity as a Tracer 2 2 Spatial measurements of conductivity, temperature and depth were used to study salinity variations along the principal channels of the tidal hypersaline creek network in the vicinity of Bushehr Port, Persian Gulf during three 25- tidal cycles in both warm and cold months. Salinity variations and tidal fluctuations were out of phase throughout the short inverse estuary. The salinity values inside the creek were higher during the warm month (August 2014) than the corresponding values during the cold month (December 2014) due to the change in evaporation rates. The salinity values, also, were linearly increased longitudinally from the inlet to the head especially during warm season. Observed evaporation rates in August and December periods and the corresponding salinity differences between hypersaline water of the creek and the incoming seawater were used to determine the Residence Time (RT). The longitudinal variation of RT showed almost linear increase from the inlet to the head. The maximum temporal distribution of RT represented an increase from ~10 days in winter to ~30 days in summer due to the change in the longitudinal salinity gradient. 11 18 2017/06/182017/06/18 1396/3/28 Seyed Taleb Hosseini Seyed Taleb Hosseini Iranian National Institute for Oceanography and Atmospheric Science Iran sthosseini@gmail.com Vahid Chegini Vahid Chegini Iranian National Institute for Oceanography and Atmospheric Science Iran vahid.chegini@gmail.com Masoud Sadrinasab Masoud Sadrinasab University of Tehran Iran masoud.sadri@ut.ac.ir Seyed Mostafa Siadatmousavi Seyed Mostafa Siadatmousavi Iran University of Science ;Technology Iran siadatmousavi@iust.ac.ir Sadegh Yari Sadegh Yari Iranian National Institute for Oceanography and Atmospheric Science Iran yari.sadegh@gmail.com Hypersalinity Inverse Estuary Residence Time Bushehr Persian Gulf Applied Meteorological Research Center of Bushehr, AMRCB, (2015), Statistical observations of atmospheric parameters of the Bushehr meteorological station, 2015 Technical Report.##Blaise, S., De Brye, B., De Brauwere, A., Deleersnijder, E., Delhez, E.J. and Comblen, R., (2010), Capturing the residence time boundary layer-application to the Scheldt Estuary, Ocean Dynamics, Vol.60(3), p.535-554.##Bolin, B. and Rodhe, H., (1973), A note on the concepts of age distribution and transit time in natural reservoirs, Tellus, Vol.25(1), p.58-62.##Choukroun, S., Ridd, P.V., Brinkman, R. and McKinna, L.I., (2010), On the surface circulation in the western Coral Sea and residence times in the Great Barrier Reef, Journal of Geophysical Research: Oceans, 115(C6).##Delhez, É.J., Heemink, A.W. and Deleersnijder, É., (2004), Residence time in a semi-enclosed domain from the solution of an adjoint problem, Estuarine, Coastal and Shelf Science, Vol.61(4), p.691-702.##Dronkers, J. and Zimmerman, J., (1982), Some principles of mixing in tidal lagoons, Oceanologica Acta, Special issue.##Hancock, G.J., Webster, I. and Stieglitz, T.C., (2006), Horizontal mixing of Great Barrier Reef waters: Offshore diffusivity determined from radium isotope distribution, Journal of Geophysical Research: Oceans, 111(C12).##Hardisty, J., (2008), Estuaries: monitoring and modeling the physical system, John Wiley & Sons.##Hassanzadeh, S., Kiasatpour, A. and Hosseinibalam, F., (2007), Sea-level response to atmospheric forcing along the north coast of Persian Gulf, Meteorology and Atmospheric Physics, Vol.95(3), p.223-237.##Hearn, C.J. and Robson, B.J., (2002), On the effects of wind and tides on the hydrodynamics of a shallow Mediterranean estuary, Continental Shelf Research, Vol.22(18), p.2655-2672.##Hosseinibalam, F., Hassanzadeh, S. and Kiasatpour, A., (2007), Interannual variability and seasonal contribution of thermal expansion to sea level in the Persian Gulf, Deep Sea Research Part I: Oceanographic Research Papers, Vol.54(9), p.1474-1485.##Jickells, T., (1998), Nutrient biogeochemistry of the coastal zone, Science, Vol.281(5374), p.217-222.##Largier, J., Hollibaugh, J.T. and Smith, S., (1997), Seasonally hypersaline estuaries in Mediterranean-climate regions, Estuarine, Coastal and Shelf Science, Vol.45(6), p.789-797.##Meyers, S.D. and Luther, M.E., (2008), A numerical simulation of residual circulation in Tampa Bay. Part II: Lagrangian residence time, Estuaries and Coasts, Vol.31(5), p.815-827.##Mudge, S.M., Icely, J.D. and Newton, A., (2008), Residence times in a hypersaline lagoon: using salinity as a tracer, Estuarine, Coastal and Shelf Science, Vol.77(2), p.278-284.##Prandle, D., (1984), A Modelling Study of the Mixing of $^{137} $ Cs in the Seas of the European, Continental Shelf Philosophical Transactions of the Royal Society of London A: Mathematical, Physical and Engineering Sciences, Vol.310(1513), p.407-436.##Reynolds, R.M., (1993), Physical oceanography of the Gulf, Strait of Hormuz, and the Gulf of Oman—Results from the Mt Mitchell expedition, Marine Pollution Bulletin, Vol.27, p.35-59.##ROPME, (2003), State of the marine environment report 2003, ROPME/GC-11/003, Kuwait.##Sadrinasab, M. and Kämpf, J., (2004), Three dimensional flushing times of the Persian Gulf, Geophysical research letters, 31(24).##Takeoka, H., (1984), Fundamental concepts of exchange and transport time scales in a coastal sea, Continental Shelf Research, Vol.3(3), p.311-326.##Tartinville, B., Deleersnijder, E. and Rancher, J., (1997), The water residence time in the Mururoa atoll lagoon: sensitivity analysis of a three-dimensional model, Coral Reefs, Vol.16(3), p.193-203.##Thoppil, P.G. and Hogan, P.J., (2010), Persian Gulf response to a wintertime shamal wind event, Deep Sea Research Part I: Oceanographic Research Papers, Vol.57(8), p.946-955.##UNESCO, (1981), Report No. 37. Practical Salinity Scale 1978: E.L. Lewis, IEEE Ocean Engineering, Jan., 1980. 145pp.##Valle-Levinson, A., (2010), Definition and classification of estuaries, In: A. Valle-Levinson, (ed.), Contemporary Issues in Estuarine Physics, Cambridge University Press, p.1-11.##van de Kreeke, J., (1983), Residence time: application to small boat basins, Journal of waterway, port, coastal, and ocean engineering, Vol.109(4), p.416-428.##Wang, Y., Ridd, P.V., Heron, M.L., Stieglitz, T.C. and Orpin, A.R., (2007), Flushing time of solutes and pollutants in the central Great Barrier Reef lagoon, Australia Marine and Freshwater Research, Vol.58(8), p.778-791.##Winant, C.D. and Gutiérrez de Velasco, G., (2003), Tidal dynamics and residual circulation in a well-mixed inverse estuary, Journal of Physical Oceanography, Vol.33(7), p.1365-1379.##Zimmerman, J.T.F., (1988), Estuarine residence times, In: Kjerfve, B. (Ed.), Hydrodynamics of Estuaries, vol.1, CRC Press, p.75–84.## ##

Design Algorithm of a Free Surface Water Tunnel to Test the Surface-Piercing Propellers (SPP); Case Study Water Tunnel of Babol Noshirvani University of Technology 2 2 Surface-Piercing Propellers (SPPs) have been widely used in high speed craft due to some desirable features such as high efficiency, omission of resistance of equipment attached to the propeller and proper functioning of cavitation. Unlike the submerged propellers, theoretical methods have no significant application on simulation of SPPsbecause of problems related to modeling of these propellers. Design of SPPs is mainly done based on empirical studies and model experiments. Water tunnel or free surface cavitation tunnel is among the most important devices to perform SPPs model testing. In this paper, the design algorithm of a free surface water tunnel to test the SPPs has been described. The design and construction stages of the free surface cavitation tunnel of Babol Noshirvani University of Technology are provided. Also,calculation of its various sectors such as elbows, nozzle, settling chamber, test section, diffuser and calculation of pressure drops, proper pump selection and dynamometer has been showed. 19 30 2016/06/7 1395/3/18 2017/06/182017/06/182017/06/18 1396/3/28 seyyed Mostafa Seyyedi seyyed Mostafa Seyyedi Babol University of Tech.; Sea Based Energy Research Group Iran Mostafa_5054@yahoo.com Rouzbeh Shafaghat Rouzbeh Shafaghat Babol University of Tech.; Sea Based Energy Research Group Iran rshafaghat@nit.ac.ir Free surface water tunnel Surface-piercing propeller Experimental test Califano, A., (2010), Dynamic loads on marine propellers due to intermittent ventilation, Phd Thesis.##Hadler, J., Hecker, R., (1968), Performance of partially submerged propellers, Proc 7th ONR Symposium on Naval Hydrodynamics, Rome.##Yin Lu Young, B.S., (2002), Numerical Modeling of Supercavitating and Surface-Piercing Propellers, Report No. 02−1 Thesis (Ph. D.), Department of civil engineering, The university of texas at austin, TX 78712, Environmental and water resourses engineering,.##Yangajeh, M.A., Seif, M.S., Mehdigholi, H., (2009), Determination of propeller speed in experimental model of surface-piercing propeller, 11th international conference of iranian marine industries, kish island. (In Persian)##Montazeri, N., Ghassemi, H., Ditermination of hydrodynamic coefficients of surface-piercing propeller by regression method, 6th annual conference of design principles and applications of high speed craft, chaloos, iran. (In Persian)##Ferrando, M., Crotti, S.,and Viviani, M., (2007), Performance of family of surface piercing propellers, Genova, Italy, pp. 63-70.##Carlton, J., (2012), Marine propellers and propulsio, Butterworth-Heinemann.##Mohammad Nouri, N., Kamran, M., Mostafapur, K., Bahadori, R., (2015), Design and fabrication of a force-moment measurement system for testing of the models in a water tunne, Modares mechanical engineering, Vol. 14, pp. 291-298. (In Persian)##https://www.marsys.tu-berlin.de/.../Flyer.##https://www.amc.edu.au/maritime-engineering/cavitation-research-laboratory.##Borchert, S., Kroger, W., Hohne, S., Damaschke, N. S., Zhou, Z., (2012), ON OPTICAL QUANTIFICATION OF CAVITATION PROPERTIES”, Proceedings of the Eighth International Symposium on Cavitation.##Van Lammeren, W. P. A., (1955), Testing Screw Propellers in a Cavitation Tunnel with Controllable Velocity Distribution over .the Screw Disk. Meeting of the New England Section of the society of Naval. Architect and marine engineering.##Aktasa, B., Atlara, M., Turkmena, S., Korkutb, E., Fitzsimmons, P., (2016), Systematic cavitation tunnel tests of a Propeller in uniform and inclined flow conditions as part of a round robin test campaign, Ocean Engineering, Vol. 120, No. 1, Page Number 136 – 151.##Ferrando, M., Scamardella, A., (1996), Surface piercing propellers: Testing methodologies, results analysis and comments on open water characteristics, Proceedings: Small Craft Marine Engineering Resistance & Propulsion Symposium.##Nozawa, K., Takayama, N., (2002), Experimental study on propulsive performance of surface piercing propeller, JOURNAL-KANSAI SOCIETY OF NAVAL ARCHITECTS JAPAN, Page Number 63 – 70.##Olofsson, N., Takayama, N., (1996), Force and flow characteristics of a partially submerged propeller, Chalmers University of Technology.##Ripken, J. F., (1951), Design Studies for a Closed-Jet Water Tunnel. St. Anthony Falls Hydraulic Laboratory, Retrieved from the University of Minnesota Digital Conservancy.##Sahini, D., (2004), WIND TUNNEL BLOCKAGE CORRECTIONS:A COMPUTATIONAL STUDY’’, Master Thesis, Texas Tech University.##Bell, J. H. and Mehta, R. D., (1989), Boundary Layer Prediction for Small Low Speed Contractions, AIAA Journal, Vol. 27, No. 3, Page Number 372 – 374.##Henry, J. R., (1944), Design of power-plant installations pressure-loss characteristics of duct components, National Advisory Committee for Aeronautics, Advanced Restrioted Report.##http://www.pumpiran.org/e-catalog/.##K&R Marine Hydrodynamics Division CUSSONS TECHNOLOGY LTD.## ##

Parametric Study on Wave Interaction with a Porous Submerged Rubble Mound Breakwater Using Modified N-S Equations and Cut-Cell Method 2 2 In this paper wave transformation in a submerged sloped breakwater and its hydraulic performance was simulated by developing a numerical model in Fortran. The code was established by combining porous flow and a two-phase model using VOF method. Modified Navier-Stokes and k-ε equations implemented to the model to simulate the flow in porous media. Cut cell method was modified to simulate fluid transformation from sloped porous media’s boundary in more accurate way and then applied in the governing equations to increase the accuracy of the model. The validity of the present program was investigated based on the comparisons with the available experimental data. The results showed that increasing of inertia coefficient and wave period and also reduction of porosity lead to some phase lags between the incident and transmitted waves. Furthermore parametric studies were performed on effect of submerged porous breakwater crest widths and heights on transmitted waves leading to useful results for design criteria. 31 40 2017/06/182017/06/182017/06/182017/06/18 1396/3/28 Saeed Booshi Saeed Booshi Amirkabir University of Technology Iran saeed.booshi@aut.ac.ir Mohammad Javad Ketabdari Mohammad Javad Ketabdari Amirkabir University of Technology Iran ketabdar@aut.ac.ir Submerged Rubble Mound Breakwater Porous Media Cut-Cell Porous Method VOF Method Transmitted Waves Vílchez, M., Clavero, M., Losada, Miguel A., (2015), Hydraulic performance of different non-overtopped breakwater types under 2D wave attack, Journal of Coastal Engineering , Vol. 107, p. 34-52.##Jensen, B., Niels Gjøl, J., (2104). Investigations on the porous media equations and resistance coefficients, Journal of Coastal Engineering, Vol. 84, p. 56-72.##Liu, Y., Li, H-J., (2013), Wave reflection and transmission by porous breakwaters: A new analytical solution, Journal of Coastal Engineering, Vol.78, p. 46–52.##Yang, C., Lu, H.D., Löhner, R., (2010), On the simulation of highly nonlinear wave-breakwater interactions, Journal of Hydrodynamics, Ser. B Vol. 22, p. 975–981.##Wu, Y-T., Hsiao, S-C., (2013), Propagation of solitary waves over a submerged permeable breakwater, Journal of Coastal Engineering Vol. 81, p. 1–18.##Hieu, P.D., Vinh, P.N., (2013), Numerical study of wave overtopping of a seawall supported by porous structures, Journal of Applied Mathematical Modelling Vol. 36, p. 2803–2813.##Mendez, F.J., Losada, I., Losada, M., (2001), Wave-induced mean magnitudes in permeable submerged breakwaters. Journal of Waterway, Port, Coastal, and Ocean Engineering, Vol. 127, p. 7-15.##Karim, M.F., Tanimoto, K., Hieu, P.D., (2003), Simulation of wave transformation in vertical permeable structure. Journal of International Offshore and Polar Engineering Conference, p. 729-735.##Karim, M.F., Tanimoto, K., Hieu, P.D., (2009), Modeling and simulation of wave transformation in porous structures using VOF based two-phase flow model. Journal of Applied Mathematical Modeling, Vol. 33, p. 343-360.##Zhang, J.S., Jeng, D.S., Liu, P.L.F., (2011), Numerical study for waves propagating over a porous sea bed around a submerged permeable breakwater PORO-WSSIII model. Journal of Ocean Engineering, Vol. 38, p. 954–966.##Guta, L., Sundar, S., (2010), Navier-Stokes-Brinkman system for interaction of viscous waves with a submerged porous structure. Journal of Tamkang Journal of Mathematics, Vol. 41, p. 217-243.##Zhao, Q., Armfield, S., Tanimoto, K., (2004), Numerical simulation of breaking waves by a multi-scale turbulence model. Journal of Coastal Engineering, Vol. 51, p. 53-80.##Garcia, N., Lara, J.L., Losada, I.J., (2004), 2-D numerical analysis of near-field flow at low-crested permeable breakwaters. Journal of Coastal Engineering, Vol. 51, p. 991– 1020.##Hieu, P.D., Tanimoto, K., (2006), Verification of a VOF-based two-phase flow model for wave breaking and wave–structure interactions. Journal of Ocean Engineering, Vol. 33, p. 1565–1588.##Lynett, P.J., Liu, P.L.F., Losada, I.J., Vidal, C., (2000), Solitary wave interaction with porous breakwaters. Journal of Waterway, Port, Coastal, and Ocean Engineering Vol. 127, p. 314-322.##Lara, J.L., Garcia, N., Losada, I.J., (2006), RANS modeling applied to random wave interaction with submerged permeable structures, Journal of Coastal Engineering, Vol. 126, p. 395–417.##Karim, M.F., Tingsanchali, T.A., (2006), Coupled numerical model for simulation of wave breaking and hydraulic performances of a composite seawall. Journal of Ocean Engineering, Vol. 33, p.773–787.##Seifollahi, M., Shirani, E., Ashgriz, N., (2008), An improved method for calculation of interface pressure force in PLIC-VOF methods. European Journal of Mechanics B/Fluids, Vol. 27, p. 1-23.##Tucker, P.G., Pan, Z.A., (2000), Cartesian cut cell method for incompressible viscous flow, Journal of Applied Mathematical Modeling, Vol. 24, p. 591-606.##Luo, X.L., Gu, Z.L., Lei, K.B., Wang, S., Kase, K.A., (2012), Three-dimensional Cartesian cut cell method for incompressible viscous flow with irregular domains, International Journal for Numerical Methods in Fluids, Vol. 69, p. 1939–1959.##Kirkpatrick, M.P., Armfield, S.W., Kent, J.H., (2003), A representation of curved boundaries for the solution of the Navier–Stokes equations on a staggered three-dimensional Cartesian grid, Journal of Computational Physics, Vol. 184, p. 1-36.##Kim, H.J., Lee, J.W., Cho, Y.S., (2010), Numerical simulation of shallow-water flow using a modified Cartesian cut-cell approach, Journal of Engineering Mechanics (ASCE), Vol. 136, p. 399–404.##Kondo, A., Huang, Y., Maeda, K., (2013), DEM coupled SMAC simulation on the moving Process of flow like landslide, Journal of New Frontiers in Engineering Geology and the Environment, Vol. 9, p.195-198.##Zhang, J., Zheng, J., Jeng, D-S., Wang, G., (2012), Numerical simulation of solitary wave induced flow motion around a permeable submerged breakwater. Journal of Applied Mathematics, p. 1-14.##He, X., Liu, N., Li, S., Wang, H., Wang, G., (2012), Local Poisson SPH for Viscous Incompressible Fluids. Journal of Computer Graphics Forum, Vol. 31, p. 1948–1958.##Katell, G., Eric, B., (2002), Accuracy of solitary wave generation by a piston-wave make. Journal of Hydraulic Research, Vol. 40, p. 321-331.##Contento, G., (2000), Numerical wave tank computations of nonlinear motions of two-dimensional arbitrarily shaped free floating bodies, Journal of Ocean Engineering, Vol. 27, p. 531–556.## ##

Effect of the Spudcan’s Footprints on Nearby Jacket’s Mudmat in Clayey Soil-Case Study 2 2 When a jack-up installed at a clay location and then leaves; it can create several meter deep footprints. In case of soft clay, the spudcan may have actually penetrated much deeper than the observed footprints. When the penetrated spudcan is pulled out, much of the soft remolded clay will flow around it and go back into the hole. This event, leaving a deep region of disturbed soil. The disturbed soil has a lower strength and stiffness in comparing to intact material around. The footprints and the associated remolded soil can potentially present significant hazards for subsequent jack-up or jacket deployments at the same location for example the events in China Sea and Pesian Gulf of Iran. In this research a case study and numerical simulation (using commercial software ABAQUS) was performed to analyze the effects of spudcan penetration on the adjacent foundations of offshore platforms in clayey soil. Inconsistent with other studies, it was also shown that the penetration of spudcan can affect the soil layer in an annular zone. The maximum width of the affected zone is almost two times of the spudcan diameter; therefore the safe distance for installation of new nearby structures is also affected. In this paper the consequence of deployment of jack-up units in soft to firm clay will be discussed and the safe distance from footprints territory is obtained. All of our cases are located in the Persian Gulf. A jacket location of Assaluyeh/South Pars Gas Field in Persian Gulf was modeled to verify the numerical results. The most important results were the diameter of disturbed soil is 1.5-2 times the spudcan diameter and the safe distance from the territory of footprint is 3-4 m in the Persain Gulf zone. These findings will help offshore geotechnical engineers to perform quick preliminary estimates on the severity of footprint-mudmat interaction problems. 41 50 2017/06/182017/06/182017/06/182017/06/182017/06/18 1396/3/28 zahra omrani zahra omrani Qom University Iran z.omrani@stu.qom.ac.ir Rouhollah Amirabadi Rouhollah Amirabadi Qom University Iran R.amirabadi@qom.ac.ir Spudcan Mudmat Clayey jack-up instability Mahanta, R., Sharma, S.C., Ajit, A. and Ghanekar, R.K., (2012), The Effect of Deployment of Jack-up Drilling Units on Clayey Soils at Offshore Locations-Case Studies, Proceeding of Indian Geotechnical Conference, pp.B238.##Dongfeng, M., Minghui, Z., Laibin, Z., Menglan, D. and Linsong, S.,(2015), Sliding risk of jack-up platform re-installation close to existing footprint and its countermeasure, Petroleum Exploration and Development, Vol.42.##Tan, X.M., Guo, J.Y. and Lu, C.,(2006), Effect of spudcan penetration on neighboring existing pile, International Society of Offshore and Polar Engineers, pp.516-523.##Boulon, M., (1989), Basic features of soil structure interface behavior, Computers and Geotechnics, Vol.7, pp.115-131.##Mostafa, Y.E. and Naggar, M.H.E., (2004), Response of fixed offshore platforms to wave and current loading including soil-structure interaction, Soil Dynamics and Earthquake Engineering, Vol.24, pp.357-368.##Ding, H. Y., Liu, J. H. and Zhang, C., (2004), Analysis of effects of the drawing of spudcan on the cylinder foundation by FEM, China Offshore Oil and Gas, Vol.16, pp.353-356.##Xie, Y., Leung, C. F. and Chow, Y. K., (2006) Effects of spudcan penetration on adjacent pile, International Conference on Physical Modeling in Geotechnics, Hong Kong, Vol.1, pp.701-706.##Yongren, R. W., Xiaobing, L. and Xuhui, Z., (2010), Effects of the Spudcan Penetration on the Adjacent Foundations, the Open Ocean Engineering Journal, Vol.3, pp.38-44.##The Society of Naval Architects and Marine Engineers, Guidelines for Site Specific Assessment of Mobile Jack-Up Units, Technical & Research Bulletin 5-5A, (2002).##Pierre, L. T. and Christian, P., (1997), Stability and operation of jack-up s, Editions Technip, Paris.##Lunne, T., Robertson, P.K. and Powell, J. J. M., (1997), Cone Penetration Testing in Geotechnical Practice, Blackie Academic and Professional, An imprint of Chapman & Hall, U.K.##API (Recommended practice for planning, designing and constructing fixed offshore platforms-working stress design), American Petroleum Institute, (2014).## ##

Comparative Study of Design Berthing Energy on Fender as per Indian Standard IS4651 Part-3:1974 and British Standard BS6349 Part-4:1994 2 2 Berthing force is a critical dynamic lateral force in the design of berthing structures, having equal relevance when compared to seismic forces. Besides, the construction cost of berthing structures is very high which can be optimized by calculating precise design berthing energy on fender and selecting optimum fender system. In the present study, design berthing energy of bulk carriers having size range from 5000 DWT to 250000 DWT is compared as per Indian Standard (IS) and British Standard (BS) in terms of various berthing conditions, approach velocity, different berthing coefficients and factor of safety. It is observed that British Standard gives more precise values for design berthing velocities. However, Indian standard provides constant value of berthing velocity for vessel sizes more than 250000 DWT, which is not the case with British standard. It is also perceived that for majority of berthing conditions and vessel sizes, Indian Standard gives higher design berthing energy as compared to British Standard. 51 58 2017/06/182017/06/182017/06/182017/06/182017/06/182017/06/18 1396/3/28 Dhara Shah Dhara Shah CEPT University India dharashah@cept.ac.in Viral Shah Viral Shah Global Marine Engineering Consultancy, Ahmedabad India viral.shah.mtech13@cept.ac.in Mehul Patel Patel Mehul Patel Patel Global Marine Engineering Consultancy, Ahmedabad India Bulk carriers Berthing Energy Fender systems berthing velocity dead weight tonnage TERMPOL, (2010), Enbridge northern gateway project, section 3.13 - Berth procedures and provisions, Northern gateway pipelines Inc.##IS4651 Part-3, (1974), Code of practice for planning and design of ports and harbours – Loading, Bureau of Indian Standards, New Delhi.##PIANC, (2002), Guidelines for the Design of Fender Systems, Marcom report of WG 33, International Navigation Association, Brussels, Belgium.##BS6439 part-4, (1994), Maritime structures: Code of practice for design of fendering and mooring systems, British Standard.## ##