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针对航空发动机转子试验器,在Pro/E中建立了机匣的三维实体模型。通过Pro/E与ANSYS的无缝连接技术,在ANSYS中得到了机匣的三维有限元模型,采用Solid185实体单元进行网格划分并采用完全法得到了机匣节点位移-频率响应,然后利用编写的MATLAB刚度计算程序得到了机匣支承刚度随频率变化的曲线。利用锤击法对转子试验器进行了机匣动刚度测试试验,并与仿真结果进行了对比。结果表明,基于ANSYS的计算刚度值和实验测试值达到了很好的一致性。同时为了体现敲击点、测试点对于刚度测试值的影响,试验采用了三种测试方案,并对三种试验方案的测试结果进行对比分析,不同方案得到的结果之间具有良好的一致性,为以后的刚度测试奠定了方法基础。
For aeroengine rotor tester, a three-dimensional solid model of the casing is established in Pro / E. Through the seamless connection between Pro / E and ANSYS, the three-dimensional finite element model of the casing was obtained in ANSYS. The solid185 solid element was used to mesh and the displacement-frequency response of the casing node was obtained by using the complete method. The MATLAB stiffness calculation program has got the receiver support stiffness curve with frequency. The dynamic stiffness test of the rotor tester was carried out by using the hammering method, and compared with the simulation results. The results show that the calculated stiffness based on ANSYS and the experimental test values to achieve a good consistency. At the same time, in order to show the influence of knocking points and test points on the stiffness test values, three test schemes were adopted in the experiment, and the test results of the three test schemes were compared and analyzed. The results obtained by different schemes were in good agreement, For the subsequent rigidity test laid the foundation for the method.