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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．
For the axisymmetric object, a third-order total wave diffraction method is proposed, and the third-order forcing on the free surface is calculated by using outward recursion. This method has been implemented on a computer. For the uniform cylinder problem, the calculated results agree well with Malenica’s semi-analytical solution. The method is also used to calculate the third-order wave moment on the cylinder. It is found that the third-order wave moment has a large magnitude in the low frequency region.