摘要
当载人飞船着陆过程中存在水平着陆冲击时,目前的铰接型座椅系统不能有效地缓冲头盆向过载。针对这种单向座椅缓冲系统的不足,提出了具有水平弹性支撑的座椅缓冲方案,利用拉格朗日方程建立了系统动力学模型。在多向冲击着陆工况下进行了数值仿真,讨论了弹性支撑刚度和阻尼参数的影响规律。结果表明,相比铰接支撑模型,具有水平弹性支撑的座椅能够降低多向冲击作用下的头盆向加速度响应峰值,且不会增大胸背向加速度响应峰值。
While manned spacecraft landing with the horizontal impact, the load of head - pelvis direction of the current buffer seat system with gemel support couldn' t be cushioned effectively. In order to improve the buffer system, the seat buffer with a horizontal elastic support was presented. The dynamic model of this buffer system was obtained through the Lagrange equations. The numerical simulations for the landing situation with multi - direction impact had been developed. The influence of the elastic stillness on the buffering had been discussed. The results showed that the peak value of the acceleration response of the seat buffer system with horizontal elastic support could be reduced although under the multi - direction impact.
出处
《航天返回与遥感》
2009年第1期10-14,共5页
Spacecraft Recovery & Remote Sensing
关键词
缓冲座椅
多向冲击
拉格朗日方程
水平弹性支撑
载人飞船
Seat buffer Multi- direction Impact Lagrange equation Horizontal elastic support Mannedspacecraft