摘要
针对某型弹用涡扇发动机振动超标问题,建立了1维有限元梁模型进行仿真与模拟,并结合实际试车数据进行了故障分析和仿真。结果表明:压气机前、后支承刚度对系统第2阶临界转速有很大影响,不合适的支承刚度使系统在工作转速范围内出现第2阶临界转速,从而导致整机振动超标。因此,降低该故障的途径是有效控制支承装配精度。
Aiming at the vibration beyond standard limit problems of a missile turbofan engine, one-dimensional finite element beam modeling was built, and the failure was analyzed and simulated in combination with the test data. The results show that the front and back support stiffness of the compressor has a great influence on the second critical speed of the system, which caused by the unsuitable support stiffness within the operation speed, and the overall engine excesses the vibration standard limit. Therefore, it is an effective way to reduce the failure by controlling assembly accuracy of the stiffness.
出处
《航空发动机》
2015年第2期66-70,共5页
Aeroengine
基金
国家安全重大基础研究项目(613139)
国家自然科学基金(61179057)资助
关键词
整机振动
动力学建模
有限元模型
故障分析
临界转速
装配精度
弹用涡扇发动机
overall engine vibration
dynamic modeling
finite element model
failure analysis
critical speed
assembly accuracy
missile turbofan engine
