某火箭发动机系统振动特性测试和仿真分析

Dynamics test and simulation of a launch vehicle engine system

从计算和试验两方面分别研究了某火箭一级发动机的振动特性。侧重介绍了模态试验和商业有限元软件在发动机振动特性快速分析中的具体应用,以及发动机三维有限元模型如何应用于全箭有限元梁模型。计算结果和试验结果吻合较好。

The vibration characteristics of a first stage rocket engine were studied by simulation and test. The modal test and application of business FEM software in the fast dynamic analysis was introduced in detail. In the end the 3D Engine FEM mode was reduced to simple beam mode and the total rocket beam model was established. The result of simulation consisted with the modal test result very well.