轻质热防护系统多层材料组合结构的热应力分析

王琪; 吉庭武; 肖曼玉; 谢公南

doi:10.3879/j.issn.1000-0887.2013.07.009

轻质热防护系统多层材料组合结构的热应力分析

doi: 10.3879/j.issn.1000-0887.2013.07.009

¹西北工业大学机电学院,工程仿真与宇航计算技术联合实验室,西安 710072;²西北工业大学应用数学系,西安 710072

基金项目: 国家自然科学基金资助项目(11202164); 教育部高等学校博士学科点专项科研基金资助项目(20116102120021)

详细信息

作者简介:
王琪(1988—),男,湖南人,硕士生(E-mail: nwpuwq@mail.nwpu.edu.cn);谢公南(1980—),男,广东人,副教授,博士(通讯作者. E-mail: xgn@nwpu.edu.cn).

中图分类号: V19;O343.6
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- 文章访问数: 1966
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出版历程
- 收稿日期: 2013-05-14
- 修回日期: 2013-05-16
- 刊出日期: 2013-07-15

Numerical Analysis on Thermal Stress of Multilayer Materials Combined Structures for a Lightweight Thermal Protection System

¹Engineering Simulation and Aerospace Computing, School of Mechanical Engineering, Northwestern Polytechnical University, Xi’an 710072, P.R.China;²Department of Applied Mathematics, Northwestern Polytechnical University, Xi’an 710072, P.R.China

摘要

摘要: 提出了轻质热防护系统外面板使用多层结构的概念，设计了2种热防护材料组合构成的3种铺层方案．通过模拟飞行器再入大气层时受到的机械和热载荷条件，数值计算得到了层间剪切力、底部温度和y方向位移．计算结果发现，层间剪切力发生在边缘部位且呈反对称分布；选用高热导率和高热容材料能够减少材料内的温度梯度，进而有效地降低结构的热应力和热变形；在均匀温度场情况下，两种材料的热膨胀系数之差越小，则层间剪切力越小．该研究表明不同的材料组合和铺层次序的多层结构，可以满足不同设计要求，具有优化设计潜力．
- 热防护 /
- 多层结构 /
- 铺层次序 /
- 材料组合 /
- 热应力
Abstract: A design concept of using multilayer structure for the top face-sheet of a lightweight thermal protection system was proposed. To obtain the different structural performances, three schemes were considered according to the different stacking orders of two kinds of insulation materials. With the mechanical and thermal loads during aircraft reentry considered, internal thermal stress of the multilayer structure was simulated. Details of shear stresses, temperature of the bottom surface and y-direction displacement were obtained. The results show that the shear stresses occur at the edge area, and the distributions are anti-symmetrical along the midline. The usage of the materials with high thermal conductivity and heat capacity can reduce the temperature gradient and then the thermal stresses and deformation. With the uniform temperature field, the difference of the thermal expansion coefficients of two materials is positively related with the shear stress between the two materials. It is suggested that, there is a great potential of optimization design for the multilayer structure through different combinations of materials in different stacking orders.
- thermal protection /
- multilayer insulation structure /
- stacking order /
- material combination /
- thermal stress

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参考文献(15)

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轻质热防护系统多层材料组合结构的热应力分析

doi: 10.3879/j.issn.1000-0887.2013.07.009

作者简介:
王琪(1988—),男,湖南人,硕士生(E-mail: nwpuwq@mail.nwpu.edu.cn);谢公南(1980—),男,广东人,副教授,博士(通讯作者. E-mail: xgn@nwpu.edu.cn).

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Numerical Analysis on Thermal Stress of Multilayer Materials Combined Structures for a Lightweight Thermal Protection System

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留言板

轻质热防护系统多层材料组合结构的热应力分析

doi: 10.3879/j.issn.1000-0887.2013.07.009

作者简介: 王琪(1988—),男,湖南人,硕士生(E-mail: nwpuwq@mail.nwpu.edu.cn);谢公南(1980—),男,广东人,副教授,博士(通讯作者. E-mail: xgn@nwpu.edu.cn).

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出版历程

Numerical Analysis on Thermal Stress of Multilayer Materials Combined Structures for a Lightweight Thermal Protection System

计量

出版历程

目录

作者简介:
王琪(1988—),男,湖南人,硕士生(E-mail: nwpuwq@mail.nwpu.edu.cn);谢公南(1980—),男,广东人,副教授,博士(通讯作者. E-mail: xgn@nwpu.edu.cn).