三体船运动与波浪载荷的伪共振问题研究

Pseudoresonance in trimaran motion and wave load estimation

运用无航速三维线性势流理论计算三体船运动与波浪载荷时,在一些离散的频率上出现了伪共振问题。本文研究了伪共振在不同工况及不同片体布置位置下的变化特点;片体干扰下三体船辐射波浪传播特点;采用拓展的边界积分方程方法来处理伪共振问题。通过与实验结果对比表明,改进后的方法能够有效的处理伪共振问题,可以很方便的运用到工程计算中。

Pseudoresonance will occur at some discrete frequencies when the zero-velocity linear potential flow theory is applied to calculate trimaran motion and wave loads. This work investigates the characteristics of the variation in pseudoresonance under different environmental conditions and different side-hull layouts and the characteristics of radiation wave propagation under side-hull interference. The extended boundary integral equation method is adopted to solve pseudoresonance. In contrast with experimental methods,the improved method can address pseudoresonance effectively and can be conveniently employed for calculation in engineering projects.