论文部分内容阅读
针对直升机浮筒着水过程中流固耦合的影响而无法通过常规静强度方法获取水冲击载荷大小及分布的问题,提出了一种基于CEL方法的着水特性分析算法。该算法通过CEL建立浮筒与水、空气域的耦合关系确立直升机浮筒着水模型,然后针对浮筒载荷与着水接触面、着水速度的关系进行分析,得到浮筒结构自身的应力变化情况和浮筒的最终漂浮姿态。仿真结果表明,所设计的算法能够对直升机浮筒着水过程进行模拟,并且能够准确得到着水过程中结构应力和接触力的实时变化。
Aiming at the problem that the hydrostatic load can not get the size and distribution of water impact load by the conventional static strength method, aiming at the influence of the fluid-solid coupling in helicopter buoy on the water, a water analysis algorithm based on CEL method is proposed. The algorithm establishes the helicopter buoy water model by establishing the coupling relationship between the buoy and the water and air domains by CEL, and then analyzes the relationship between the buoy load and the water contact surface and water velocity, and obtains the stress changes of the buoy structure itself and the buoyancy Final float gesture. The simulation results show that the proposed algorithm can simulate the helicopter buoyancy process and obtain the real-time changes of structural stress and contact force accurately.