摘要
采用有限元仿真计算和实验测试相结合研究手段,测试某重型燃气轮机支架动刚度,以形成较为完备计算燃机支架动刚度的有限元仿真流程和计算分析方法。三维模型和实验测试所用试验件按4:1进行缩比并建立模型、加工制作。采用锤击法进行测试,并以其结果对有限元仿真计算结果进行验证。经过对比验证发现两者所得到结果吻合较好。结果表明,基于实验测试燃气轮机支撑结构动刚度有限元仿真流程及分析计算方法是可行的,计算结果具有一定可靠性,对进行相关方面研究具有一定参考价值。
Gas turbine is a high-speed rotating machine. The dynamic characteristics of its rotor have important effectson the safety, while the stiffness of its supports has significant effects on the critical speed of the rotor. Therefore, searchingfor the dynamic stiffness of the gas turbine supports plays an important role in R＆D. In this paper, the dynamic stiffness ofthe gas turbine supports is measured by testing and calculated with finite element analysis software Ansys. First of all, a 1：4scale-reduced testing model of the support is prepared, and the hammering method is used to test the dynamic characteristicsof the model in different working conditions. Then, the model is simulated with the finite element analysis software Ansys.The results of the testing and the finite element analysis of the model are in good agreement. The results show that the FEAanalysis for dynamic stiffness simulation of the gas turbine supports is feasible and the result is reasonable. This work hassome reference value for gas turbine vibration study.
出处
《噪声与振动控制》
CSCD
2016年第3期38-41,189,共5页
Noise and Vibration Control
基金
国家自然科学基金资助项目(11272204)
关键词
振动与波
燃气轮机
动刚度
支撑结构
有限元仿真
vibration and wave
gas turbine
dynamic stiffness
support structure
finite element simulatio
