舱外航天服热试验数值仿真方法研究

摘要

To simplify the numerical simulation processing and to keep the accuracy of simulation result, numerical simulation method of spacesuit thermal vacuum test is studied. With the test equipment property analyzed and the theoretical analysis of idealized heating model performed, simulation model is set up employing NX space systems thermal routine suite. According to the conclusion, the GMM (geometry mathematical model) of spacesuit, rigid brackets of thermal test, and emissivity of infrared cage heaters affect numerical simulation accuracy. The simulation error below 10% is achieved contrast to test data recorded.%研究舱外航天服热试验数值仿真方法,以达到简化仿真工作,同时保证仿真结果准确的目的.从分析试验组件物性着手,建立一对一理想加热模型分析影响被加热表面热流的因素,再用NX软件建立试验仿真模型和试验数据对比,讨论仿真关键参数.研究结果表明,只有舱外航天服外形和实际接近、添加遮挡热流的试验支架等物体、适当调整红外加热笼发射率,仿真模型才能准确模拟试验热流情况,航天服上半身受遮挡较少,试验测量较准确,仿真结果和试验数据的偏差小于10％.