en Offshore Hydrodynamic مقاله پژوهشي Research Paper <div style="text-align: justify;"><span style="font-size:11.0pt"><span new="" roman="" style="font-family:" times="">The oscillating water column is one of the most applicable and commercialized wave energy converters. There are some analytical-based simplified approaches like the rigid piston model for analyzing such converters in which the dynamic motion&#39;s damping, inertia, and stiffness are respectively modeled with a resistor, inductor, and capacitor (an RLC circuit). The power resonant frequency of wave energy converters is computed by solving the motion equation via its equivalent RLC circuit model. The free decay test is the other simple method for determining the resonant frequency and has been investigated experimentally. However, a comprehensive study is required. In this investigation, first, the effect of parameters like pressure, flow rate, and their phase difference on power resonant frequency, capture factor, etc., are conceptually investigated. Then, the relation between resonant frequency and free decay test frequency is studied for different chamber sizes. The results indicate that the free decay test frequency is generally close to the power resonant frequency.</span></span></div> Wave energy converter,oscillating water column,power resonant frequency,free decay test,phase difference,RLC circuit 93 105 http://ijmt.ir/browse.php?a_code=A-10-1184-1&slc_lang=en&sid=1 Abuzar Abazari abuzarabazari@cmu.ac.ir 10031947532846003884 10031947532846003884 Yes Chabahar Maritime University Mohammad Reza Zareei mrzarei@cmu.ac.ir 10031947532846003885 10031947532846003885 No Chabahar Maritime University Saleheh Poursheikhali s.poursheikhali@cmu.ac.ir 10031947532846003886 10031947532846003886 No Chabahar Maritime University