摘要
采用ITPS(Integrated Thermal Protection Systems)承力结构的方法,开发了基于PATRAN PCL语言的参数化建模程序,能够自动、快速地建立该类型结构的有限元模型。通过改变腹板与底面板之间的夹角,得到了ITPS最佳热短路模型。通过数值分析研究了镂空腹板对ITPS承载能力及隔热性能的影响。结果表明,腹板与底面板夹角76°时,ITPS静力分析的最大等效应力达到极小值,镂空腹板高度和倒角半径的综合设计关系到ITPS优化设计的成败。在镂空腹板宽度和高度相同的情况下,应该优选倒角半径大的镂空腹板结构形式。同时,镂空腹板改善了ITPS底面板的温度均匀性。镂空腹板的数值分析结果为ITPS结构优化设计提供一定的参考和依据。
Integrated Thermal Protection Systems(ITPS) bearing structure is simulated by shell element and parametric modeling program of PATRAN is secondarily developed. The finite element model can be established automatically and fast by this program. The best model of ITPS thermal short circuit is got by changing the intersection angle between web and the bottom panel. The carrying capacity and heat-insulating property of ITPS hollow web is studied. When the angle reaches 76 degrees, the integrated design of the height of the web and the radius of the chamfer determines ITPS optimal design succeeded or not. When the width and height of the hollow web is the same, it is necessary to optimize the structure of the hollow web with relative large chamfer radius. At the same time, the hollow web improves the temperature uniformity of the ITPS panel. The results of numerical analysis can provide some basic data for the optimization design of ITPS structure.
出处
《应用力学学报》
CAS
CSCD
北大核心
2018年第4期783-789,共7页
Chinese Journal of Applied Mechanics
基金
航空科学基金(2016ZA23003)
关键词
一体化热防护系统
结构优化设计
防隔热性能
PATRAN
PCL
二次开发
Integrated Thermal Protection System (ITPS)
structural optimization design
thermal insulation performance
Patran PCL
secondarily development
