摘要
基于计算流体动力学理论与刚体动力学理论进行两栖车波浪中运动的数值模拟,解决两栖车辆耐波性能难于准确预报的问题。采用N-S方程结合造波机理论模拟规则波浪,基于线性造波机理论实现仿物理机制造波,通过增加动量源项实现数值消波。采用刚体空间运动方程计算车辆航态,外力项通过积分车体表面应力获得。计算了典型的迎浪直航运动,运动边界采用动网格实现,自由面采用VOF方法处理,流场控制方程采用二阶格式离散。计算结果表明,该方法可以有效地预报车辆在波浪中航行时的阻力、升力、航态。
Motion of amphibious vehicle sailing in wave was simulated based on computational fluid dynamics and rigid body dynamics for solving the problem that seakeeping capacity of vehicle is hard to forecast exactly. Regular wave was simulated based on N-S equations and wave making machine theory. Wave was generated based on imitating linear wave-generating mechanism of real wave making machine and sponged by adding source term. Rigid body space motion equations were employed to compute sailing posture of vehicle. Force term was calculated by integrating stress of vehicle body surface. Shipping in head wave, a typical motion for study seakeeping capacity, was computed as example. Moving boundary was realized by dynamic mesh method, and fxee surface was captured by VOF method. Second-order scheme was used to discretize governing equations. Results show that the method is good for forecast resistance, lift force and posture of vehicle sailing in wave.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第10期3142-3145,共4页
Journal of System Simulation
基金
国家自然科学基金(50579073)
关键词
计算流体动力学
两栖车辆
耐波性能
数值波浪水池
computational fluid dynamics
amphibious vehicle
seakeeping capacity
numerical wave basin
