基于LS-DYNA的某型直升机水上砰击分析  

Study on Crashworthiness of Helicopter on Water by LS- DYNA

作　　者：李旭东[1] 周伊鹏 张红英[1] 童明波[1] 

机构地区：[1]南京航空航天大学飞行器先进设计技术国防重点学科实验室 [2]航天科工三院三部

出　　处：《航空计算技术》2015年第3期56-59,共4页Aeronautical Computing Technique

基　　金：航空科学基金项目资助(2012ZC52035);江苏省高校优势学科建设工程基金资助

摘　　要：针对某型直升机适航取证的任务需求,在相应简化和配重基础上,对直升机进行全机柔性体建模。参照WG30整机水上砰击试验的研究方法,通过LS-DYNA中的光滑质点流体动力学(SPH)方法研究直升机在9 m/s垂直速度下水上砰击情况,选取驾驶舱底部、客舱中部、客舱后部三个位置为测量点,得到直升机触水后的整体运动趋势以及直升机底部压强、加速度与底部材料之间的关系;通过不同模型的对比,研究了短翼和气囊对直升机水上砰击的影响。仿真结果与试验结论相符,验证了计算的可靠性,为直升机水上砰击提供了一定的技术支持。Under the requirement of airworthiness regulation for a helicopter,a full-scale elastic helicopter FE- model was made with simplified components and added masses. By referring to research methods of WG30,the crashworthiness of helicopter under 9 m / s vertical velocity was simulated by LS- DYNA with the method of SPH. The under of cockpit、the central of cabin and the back of cabin were chosen to test.Global behavior、pressure and acceleration were simulated and the relations between materials and pressure was simulated; the influence of stub wing and airbag were researched. The simulations correspond to the research of WG30,the reliability of simulations were validated,which is valuable to helicopter crashworthiness.

关 键 词：水上砰击 SPH 全机柔性体 短翼 气囊 

分 类 号：V215[航空宇航科学与技术—航空宇航推进理论与工程]