轴对称物体上的三阶波浪力

A method for third-order wave force on axisymmetric bodies

对于轴对称物体，提出了一个三阶波浪力的全绕射计算方法，自由水面上的三阶强迫项采用向外递推的方法加以计算．本方法已在计算机上实现．对于均匀圆柱问题，本方法计算结果与Ｍａｌｅｎｉｃａ的半解析解吻合良好．本方法还被用于计算圆柱上的三阶波浪力矩，结果发现在低频区三阶波浪力矩具有很大的量值．

A third-order diffraction theory for the third-order wave loads is proposed. The method has been implemented for bodies of revolution with vertical axes, but the theory is also available for arbitrary bodies. A numerical examination is made to validate the numerical code by comparing the third-order force on a uniform cylinder. The method has also been used to compute the third-order moments.