摘要
针对实际的快速温变试验中不能直观迅速地了解引信电子部件失效的原因及其失效过程的不足,提出基于COSMOSWORKS有限元分析软件的引信电子部件热应力仿真方法。该方法是热结构的耦合运算,包括热分析和热应力分析。首先根据温度循环试验剖面图定义参数,包括分析类型和选项、材料属性、施加载荷和约束,划分网格,然后应用软件的热分析功能求解在一定边界条件下的温度场,将温度场的计算结果作为热载荷再进行热应力仿真,求解热应力应变分布。快速温变循环强化试验表明:仿真结果符合实际,通过热应力仿真能够直观快速地发现引信电子部件的失效原因,了解失效过程,解决引信可靠性承受快速温变能力差的问题,为分析引信电子部件的热失效机制、优化其结构、提高引信可靠性提供了理论依据。
Being faced with the question that we can＇t realize the reason of fuze electronic components failure and the failure process clearly when temperature changes rapidly in practicality, using the finite element analysis software COSMOSWORKS to do thermal stress simulation on electronic components. This method is of heat structural coupling operations including thermal analysis and thermal stress analysis. At first, it was to define parameters according the temperature cycling test section including analysising type and option, material properties, exerting load and constraint, dividing the grid. Then, applied the thermal analysis function to solve temperature field in certain boundary conditions and carried out the thermal stress simulation to solve thermal stress and strain distribution using the temperature field calculation results as thermal loading. Rapid temperature change cycle intensifying test showed that the simulation results accorded with the situation of reality. Through the thermal stress simulation, we could find the failure cause and process quickly, and then to solve the poor reliability of fuze under rapid temperature change. The simulation provided theory basis for analysing the failure mechanism of the fuze electronic components, optimizing its structure and improving fuze reliability.
出处
《探测与控制学报》
CSCD
北大核心
2011年第2期45-50,共6页
Journal of Detection & Control
基金
国家教育部基金项目资助(2008024)
国防重点基金项目资助
关键词
引信
电子部件
热应力仿真
可靠性
fuze
electronic components
thermal stress simulation
reliability
