摘要
为了极大地提高发动机的结构完整性能,利用MSC.Nastran软件的结构优化功能,对星形药柱发动机进行了形状优化分析。探讨了发动机形状优化中位移模式和辅助模型的建立方法,根据发动机的结构和受力特点,建立了星形药柱的平面应变模型,对星形药柱的控制参数进行了灵敏度分析,并在此基础上对星形药柱进行了形状优化。优化结果表明:增大星边夹角和顶弧倒角可有效地缓解应力应变的集中程度。
Structural integrity is one criterion of vital importance for solid motor. It is shown that the optimization of grain shapes and material properties can greatly improve the structural integrity. Owing to particularity of shape optimization, the Basis Vector which guides the optimization procedure is introduced. The auxiliary model which is used to help generate basis vectors is also designed. Based on the characteristics of solid motor and its loads conditions, the plain-strain model of the star is built. Several sensitivity factors of the shape parameters are studied, and the optimal schemes are discussed later. The results obtained will offer guidance to the structural integrity analysis and optimization design for solid motor. The methods and conclusions are beneficial to the designers and manufactttring of solid motor.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2008年第4期6-10,共5页
Journal of National University of Defense Technology
基金
国防科技大学预研基金资助项目(JC06-01-01)
高等学校博士学科点专项科研基金项目(20069998002)
"十一五"国家部委资助项目
关键词
固体发动机
形状优化
灵敏度分析
结构完整性
solid motor
shape optimization
sensitivity analysis
structural integrity
