大型气垫船阻力特性仿真与影响因素分析

The simulation of large hovercraft resistance characteristics and influence factors analysis

气垫船在实际航行过程中,海洋环境和装载条件都会对船体阻力产生影响,难以利用实验手段直接得到不同影响因素下的阻力特性。通过计算机建模将各阻力分量进行耦合,采用变步长4阶5级龙格库塔算法,建立了气垫船阻力模型。利用该模型进行仿真计算,并将所得到的结果与实艇试验反推数据进行对比分析,所建立的模型较好地反映了气垫船阻力特性。在此基础上,又将不同海洋环境和装载作为输入参数,得到了在不同影响因素下的阻力特性曲线。研究结果表明,相较其他因素而言,海况变化对气垫船阻力产生的变化影响最大。

According to the air cushion vehicle hull resistance characteristic,and the resistance impacted by hull status,environment and numerous factors during the hovercraft sails is taken into account.The mathematical model and computer stimulation are set based on coupling calculation by using variable step fourth order Runge-Kutta method for different kinds of resistance,Compared to the backstepping data from the experiment ship,the model established can be verified to better reflect the hovercraft resistance characteristic.On this basis,sea state,wind direction air temperature and load impacting on hovercraft resistance are analyzed by stimulation.The results of research show that the influence of sea state ranks the highest,and becomes stronger with the increase of ship’s speed.