en Ship Hydrodynamic مقاله پژوهشي Research Paper <table class="Table" style="margin-left:7px; border-collapse:collapse; border:none"> <tbody> <tr> <td style="border-bottom:1px solid black; width:463px; padding:6px 0in 6px 0in; border-top:1px solid black; border-right:none; border-left:none" valign="top"><span style="font-size:8pt"><span new="" roman="" style="font-family:" times=""><span style="font-size:11.0pt">Catamaran added V-like center bow (INCAT) is investigated as a wave-piercing vessel to decrease vertical acceleration and diminish slam events during sea-keeping operation. The catamaran and the vessel bow were modeled and the vertical acceleration of model was validated with experimenal test. The geometry of V-like center-bow such as slope of center bow and elevation from demi-hulls was optimized numerically in the case of 3 different slops of bow model. Considering different center bow elevation of 9.5 and 49.5 mm, the pressure contour of the INCAT vessels was compared numerically. The optimized INCAT vessel as well as the catamaran vessel was fabricated and exposed experimentally in a wavy environment with two significant wave height of 11 and 17 cm using a towing tank test. Thus hydrodynamic parameters such as vertical acceleration, heave, pitch, and resistance force were measured and compared. The results show no slam event in the environment with a wave height of 11 cm but the slam event occurr at the experiment with the wave height of 17 cm.</span><span style="font-size:10.0pt"></span></span></span></td> </tr> </tbody> </table> ,Catamaran,INCAT,V-like center bow,Vertical acceleration,slam 13 24 http://ijmt.ir/browse.php?a_code=A-10-1728-2&slc_lang=en&sid=1 Mohammad Reza Negahdari m.r.negahdari@gmail.com 10031947532846004081 10031947532846004081 Yes Chabahar Maritime University Amin Najafi najafi.amin@yahoo.com 10031947532846004082 10031947532846004082 No Imam Hossein comprehensive University Peyman Ahmadi payman.ahmadi0@yahoo.com 10031947532846004083 10031947532846004083 No Imam Hossein comprehensive University Seyed Mahmood Kheradmand najafi.sharif@yahoo.com 10031947532846004084 10031947532846004084 No Imam Hossein comprehensive University