基于ALE法的水陆两栖飞机船体着水性能分析

水陆两栖飞机的着水性能是体现其综合性能的重要因素之一.应用ALE法对三种水陆两栖飞机船体截面进行入水仿真计算,从着水载荷、喷溅性能及运动响应三个方面对着水性能进行综合评估.对比分析了直线型、带舭弯弧形、复合型三种构型截面在不同速度、不同重量下的压力分布、喷溅性能以及运动响应,得到了三种截面横向压力分布规律.计算结果显示相同状态下,喷溅性能复合型优于带舭弯弧形、带舭弯弧形优于直线型;过载复合型远大于带舭弯弧形,带舭弯弧形稍大于直线型,综合看来带舭弯弧形截面着水性能最佳.

Analysis of Water Entry Performance of Amphibious Aircraft Hull Based on ALE Method

The water landing performance of amphibious aircraft is one of the important factors of its over-all performance. The water entry of three kinds of amphibious aircraft hull section was simulated using ALE method. The water entry performance was evaluated from water load,spray performance and motion response. Comparative analysis of pressure distribution,spray performance and motion response of three configurations -straight section,flared section,mixed section-were made at different speeds and different weight. Lateral pressure distribution of three sections had been gotten. The results show that, under the same state,spray performance of mixed section is better than flared section,flared section is superior to straight section;overload of mixed section is much larger than the flared section,flared section is slightly greater than straight section. A comprehensive view,the water landing performance of flared section is the best.