功能梯度热障涂层热应力的有限体积法研究  

Research on the finite volume method for the thermoelastic stress analysis of thermal barrier coatings

作　　者：龚京风[1,2] 张文平[2] 宣领宽[2] 明平剑[2] 韩春旭[2] 

机构地区：[1]武汉理工大学能源与动力工程学院,湖北武汉430063 [2]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2014年第6期713-718,共6页Journal of Harbin Engineering University

基　　金：中央高校基本科研业务费专项资金资助项目(HEUCF130302)

摘　　要：为了研究功能梯度热障涂层(TBC)热应力问题,改进了交错格点型有限体积方法(SCV-FVM)。运用交错网格技术,待解变量定义在单元节点上,物性参数定义在单元中心上。计算功能梯度圆盘的应力场,结果与理论解吻合良好,验证方法的正确性。通过与有限元结果及高阶功能梯度理论(HOTFGM)结果对比发现,SCV-FVM可以有效避免物性参数变化引起的人工数值不连续。研究功能梯度TBC热应力问题,分析涂层厚度变化对热应力场的影响,通过与ANSYS计算结果对比验证数值模拟的正确性。In order to analyze the thermoelastic performance of a thermal barrier coating with a functionally graded material （ FGM） layer, the staggered grid finite volume method （ SCV-FVM） has been developed. The staggered grid technique was adopted by defining variables at the vertex and material properties at the cell center. SCV-FVM was applied to predict the stress of an FGM disk. The results agree well with the theoretical solution which validates its accuracy. The comparisons between the results from SCV-FVM, the conventional finite element method and the higher order theory functionally graded method （ HOTFGM） show that SCV-FVM can avoid the stress discontinuity caused by the change in the matter parameters. The thermoelastic performance of functionally graded TBC was investigated. The obtained results are consistent with the ANSYS results which validates the simulations. The effects of the thickness have been discussed.

关 键 词：热障涂层 功能梯度 有限体积法 交错网格 应力场 

分 类 号：O343.1[理学—固体力学]