用面元法预报船舶的兴波阻力及波型

Panel Method for the Prediction of Ship Wave Resistance and Wave Pattern

采用基于开尔文源的面元法求解航行于均匀流场中的船舶兴波问题.在船体湿表面上布置开尔文源,使其严格满足船体表面条件.数值计算中,首先采用分部积分对被积函数进行简化处理,然后采用高斯积分实现面元和线元上的积分,避免了被积函数为高频振荡函数所带来的数值计算的复杂性和不确定性.计算结果表明,其波型及兴波阻力系数与试验结果和其他数值方法相比均吻合较好.

The wave problem is predicted by adopting panel method based on Kelvin source for a ship traveling in a uniform flow. The hull is discretized into a number of panels with Kelvin source distribution, and the kinematic condition is satisfied exactly on the wet ship body. The subsection integral is used to get a simple funetion at first in the numerieal ealeulation, and boundary integral is realized by gauss integral on each panel and line, then the complexity and isstability as a result of the high frequeney surge function can be avoided. The numerical results show that the wave pattern and the wave-making resistance coefficient from present paper are agree with experimental data and other numerical methods.