基于动网格模型的两栖车辆数值模拟

采用弹簧近似法和网格局部重构法相结合的非结构动网格技术,利用水动力模型耦合6自由度刚体运动和自由水面进行数值模拟,计算两栖车辆的水动力特性。研究结果表明,动网格模型对求解三维流固耦合问题有效,运用数值方法分析两栖车辆水动力特性、预测航速航姿是有效的两栖车辆水上性能的设计方法。

Numerical simulation of amphibious vehicle based on the dynamic-mesh model

The unstructured dynamic-mesh model is used,which is based on the spring-based smoothing method and local remeshing method. The numerical simulation method is presented through computing unsteady hydrodynamic coupling with six-degree-of-freedom rigid body analysis and free surface integrator. The hydrodynamic characteristic of the amphibious vehicle is simulated by the method. The obtained result shows that the dynamic-mesh model is effective in solving the 3D fluid-solid-coupled problems. And numerical simulation study is a useful way for designing the hydrodynamic performance of the vehicle,and can be successfully used to analysis hydrodynamic performance and forecast the moving speed and obliquity of the vehicle running in the water.