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用有限元方法对复合材料发动机机体的应力场和位移场进行了变温粘弹性研究，通过机体的动态实时测试，验证了计算结果的正确性，说明本文所采用的变温粘弹性模型和变温粘弹性有限元方法是可行的，反映了复合材料发动机机体的变形规律。所设计的前后处理软件把机体材料微观性能对机体有限元宏观计算方面的影响考虑进去，把结构用复合材料的微观设计与宏观性能相结合，描述了复合材料构件现代设计方法。在聚合物基复合材料发动机机体的结构分析中应考虑结构的粘弹性和温度变化，但考虑温度变化的影响，计算过程更复杂。从本文计算可以看出，由于ＤＡ４６２Ｑ型复合材料发动机机体的最高温度在２００ ℃以内，温度对计算结果影响不是非常显著。
The finite element method is used to study the temperature and viscoelasticity of the stress and displacement fields of composite engine body. The dynamic real-time test of the engine body verifies the correctness of the calculation results. It shows that the variable temperature viscoelastic model and the viscoelastic Finite element method is feasible, which reflects the deformation law of composite engine body. The designed pre-post-processing software takes the micro-performance of the body material into consideration of the macroscopic calculation of the body’s finite element, and combines the microscopic design and macroscopical performance of the composite with the structure to describe the modern design method of the composite material. The structural viscoelasticity and temperature change should be considered in the structural analysis of polymer matrix composite engine body. However, considering the influence of temperature change, the calculation process is more complicated. It can be seen from the calculation in this paper that due to the maximum temperature of DA462Q composite engine body is within 200 ℃, the influence of temperature on the calculation result is not very significant.