水陆两栖飞机船体着水载荷数值与试验分析

摘要

水陆两栖飞机的着水载荷是影响结构设计的主要因素之一。应用数值仿真与模型试验相结合的方法对船体着水载荷进行了研究。数值仿真建立了包含空气场的有限元模型，计算了不同船底截面形式、结构重量、入水速度下的楔形体局部砰击压力变化及分布，并同模型试验结果进行了对比。结果表明，数值结果与模型试验值吻合良好，并得到了两种截面形式的压力分布规律，可为水陆两栖飞机船体构型的设计提供参考。%Water load of amphibious aircrafts is one of the main factors influencing their structural design.The water load of amphibious aircraft hull was studied with numerical simulation and model test approach.Its finite element model included an air field.The local slamming pressure variation and distribution were calculated with different cross-sections of hull bottom,varying structural weight and speeds entering water.The results were compared with test ones. The results showed that the numerical results are in good agreement with model test data.The pressure distributions of two hull cross-sections were obtained,they provided a reference for amphibious aircraft hull configuration design.