L型控制发动机两种推力测量方法比较

摘要

为了满足喷管轴线与燃烧室轴线相垂直的发动机推力测量的需要，先后采用两种不同结构的试车架进行多发试验验证，对试验结果进行分析、对比，结果表明，采用与推力同轴单推力传感器的方案推力测量精度高，推力测量结果比中散差小，满足了发动机试验的要求。这一经验可供同类试车架设计参考。%Based on the integral creep constitutive relations of viscoelastic material with damages, a new increment finite element method to solve stress, strain and damage variables is developed by using equivalent stresses, three-dimension damage field can be analyzed and coupling stress and damage field can be solved by using iteration method. The calculated results show that the method is effective and reliable in analyzing the grain damages.