一种返回舱座椅水平缓冲杆设计

在对典型"联盟式"返回舱座椅局部改进的基础上,建立了能够吸收水平着陆冲击能量的水平缓冲杆支撑座椅模型。基于胀环式缓冲杆的缓冲原理和工作特性,定义了典型、极限水平着陆工况和水平缓冲杆设计要求;应用三部分设计方案和优化选择程序,分别设计了各段胀环长度相等和不相等的水平缓冲杆。座椅实例设计结果表明,综合了着陆工况、缓冲原理、工作特性和优化效率各个影响因素的设计方法,具有统一、全面和高效的特点;优化的水平缓冲杆支撑座椅,实现了同时缓冲头盆向和胸背向过载、适应更宽着陆工况的目的。

Design of horizontal cushion pole for a buffer-seat in crew return vehicle

On the basis of local improvement of a typical "TMA" buffer seat, a cushion pole supporting buffer seat model was set up with a goal to absorb horizontal landing shock energy. The definitions for typical horizontal landing con-ditions, limit horizontal landing conditions and design requirements of a horizontal cushion pole were founded on the buffer principle and working characteristics. A three-segment schemes and optimization codes were employed during the design process for the horizontal cushion pole with equidistant and non-equidstant expandable rings, respectively. Numerical sim-ulations of the seat design demonstrated that the cushion pole supporting buffer seat alleviates the head-pelvis and chest-back excessive load; the design methodology is uniform, comprehensive and efficient, it includes the landing condition,buffer principle and working character; the potential design methodology makes the buffer seat satisfy more landing condi-tions.