The ocean oil storage vessel is a very large floating structure (VLFS),thus its hydroelastic response is an important problem to be predicted.By using sine modal shape functions,the radiation potential and hydroelastic response were expressed in terms of the modal superposition.Then the velocity potential and fluid stress on the body surface of a quarter model were solved according to the structural symmetry by means of the Green function method based on 3 D potential theory.The hydroelastic response of the oil storage vessel,deflection of the vessel bottom and bending moment were calculated by use of the hydroelastic equation of motion.Hydrodynamic parameters were also analyzed with the change of water depth and wavelength.The results provide a theoretical basis for future design and research work.%海上石油储备基地的主要结构-超大型浮式储油船属于超大型浮式结构物（VLFS ），对其水弹性响应分析是研究设计中的一个重要环节。采用正弦振型函数，将结构运动产生的辐射势及水弹性响应根据模态形式进行展开叠加，然后通过对边界积分方程应用三维势流理论中的格林函数法，其中由于结构的对称性，只建立储油船的1/4数值模型，求出速度势及流体压力，最后将其代入结构水弹性运动方程。探讨了广义水动力参数随水深和相对波长的变化规律，进一步计算不同水深及波长时储油船的水弹性响应、底板变形及其内部弯矩，为今后的研究提供理论依据和方法。
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