两栖车辆水上加速性能数值仿真研究

摘要

Based on the theory of computational fluid dynamics and rigid body dynamics, numerical simulation on acceleration performance of amphibious vehicle on waler was presented, which can predict the acceleration performance of amphibious vehicle. The thrust characteristics of navigation for amphibious vehicle were obtained by the calculation of vehicle structural parameters. Moreover, the movement state of vehicle was calculated by coupling the six -degree-of-freedom movement and free water surface. Meanwhile, the problem of moving boundaries was solved by means of dynamic meshes. The calculation result shows that the numerical simulation is an effective way to research the acceleration performance of amphibious vehicle on water.%在两柄车辆的设计阶段,数值仿真是预测车辆水上航行性能的有效方法.基于计算流体动力学理论和刚体动力学理论,对两栖车辆的水上加速运动进行数值仿真,并对两栖车辆的加速性能进行了预测.通过对车辆结构参数的计算,得到了两柄车辆的航行推力特性.利用刚体六自由度运动和自由水面耦合的方法,计算了车辆的航行姿态,采用动网格技术实现运动边界.计算结果表明,两栖车辆的水上加速性能基本上达到了设计要求,同时也说明数值仿真方法可以有效地预测两栖车辆的水上加速性能.