某重型燃气轮机机匣有限元模态分析  

Finite Element Modal Analysis of Heavy-duty Gas Turbine Casing

作　　者：刘星[1] 李克安[1,2] 唐驾时[3] 温纪云[3] 

机构地区：[1]长沙理工大学汽车与机械工程学院,长沙410076 [2]湖南理工学院机械工程学院,湖南岳阳414006 [3]湖南大学力学与航空航天学院,长沙410082

出　　处：《湖南理工学院学报（自然科学版）》2010年第1期53-58,共6页Journal of Hunan Institute of Science and Technology(Natural Sciences)

基　　金：国家863计划项目(2004-AA-503010);国家自然科学基金资助项目(10672053)

摘　　要：对某重型燃气轮机机匣进行了热分析,得到了机匣的温度场,然后在考虑温度影响和不考虑温度影响的情况下,分别对其进行了模态分析,并得出结论:温度因素对机匣的振动特性有一定影响,考虑温度因素时,机匣的弯曲振动固有频率值有所降低,但机匣的扭转振动及其固有频率值变化甚微.Thermal analysis of heavy-duty gas turbine casing is adopted at first, and temperature field of gas turbine casing is obtained; then considering the temperature effect and without considering temperature effect on the turbine casing, modal analysis of gas turbine casing is respectively taken. The conclusions obtained： temperature factor has some influence for vibration characteristic of casing, natural frequency value of the casing bending vibration mode decreased considering the impact of temperature, but the torque vibration mode and its inherent frequency value changed little.

关 键 词：重型燃气轮机 热分析 温度场 模态分析 

分 类 号：TH113[机械工程—机械设计及理论]