返回舱着陆工况对着陆冲击特性的影响

摘要

返回舱着陆工况对冲击响应特性有很大影响。建立了返回舱着陆冲击仿真分析模型，并利用已有试验数据对模型进行验证。通过显式非线性动力学分析方法模拟了返回舱着陆冲击过程，利用正交试验设计法进一步分析了返回舱着陆工况相关参数对冲击响应特性的显著性影响情况及其规律。结果表明：竖直速度、俯仰角、侧倾角及其因子间的交互效应对最大加速度的影响显著，水平速度和滚动角的影响作用不显著。这些结论可为返回舱地面相关试验和结构分析设计提供参考。%Landing conditions of space capsule have a great effect on impact characteristics.Firstly,the analysis and simulation model of space capsule was established and validated according to an available experimental data.Methods for explicit nonlinear kinetics analysis were used to simulate the landing impact process of space capsule.And the significance effect and the influence disciplines of parameters related to landing conditions on impact characteristics were analyzed by the orthogonal test design.Results demonstrate that the vertical velocity,the pitch angle,the heeling angle and their interactions significantly influence the maximum impact acceleration,while the horizontal velocity and the rolling angle rarely influence it.These conclusions can provide important reference to both the ground tests of landing impact as well as the structural analysis and design.