摘要
确定计算模型时 ,发动机定子按实际刚度 ;为了避开整机非线性问题 ,轴承刚度采用迭代算法进行线性化 .采用Madina程序对发动机整机进行了动力分析 ,分析包括模态分析和一级涡轮有 1克公分不平衡量时压气机各级叶尖处的位移响应 .分析结果与试验进行了比较 ,吻合度优于美国GE公司计算结果 .认为造成偏磨故障的原因是弹性环压死 ,使压气机转子与定子反向平动的第六阶临界转速上升到放气阀门关闭时转速所致 .装配工艺采取措施后 ,克服了此偏磨故障 .轴承径向刚度采用迭代算法 ,避开陷入整机非线性问题 .
While the actual stiffness of engine stator is used for modeling, the stiffness of bearings is linearized by iteration to avoid the non linearization of the whole engine. A dynamic analysis has been done for the whole engine using MADINA program to cover both model analysis and displacement response at compressor blade tips with 1 g·cm imbalance at stage one turbine. The results of analysis are compared with the test results, and their agreement with test results is better than the agreement of the GE company′s results of calculation. The partial friction is believed to be caused by the seized elastic ring, which causes the 6′th order critical rotational speed at which the compressor rotor and the stator rotate in parallel and opposite direction to go up to the rotational speed at which the relief valve colses. The partial friction is eliminated by improving the assembly process.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2001年第5期651-654,共4页
Journal of Harbin Institute of Technology
