大尺寸液体火箭发动机机架振动试验加载装置设计

目的设计大尺寸液体火箭发动机机架振动试验加载装置,使该型号发动机机架可顺利完成振动试验考核。方法在满足连接强度基础上,合理设计加载装置的加强筋等结构的布局,并通过有限元计算方法对加载装置进行优化设计,进一步提高加载装置一阶固有频率。结果设计完成了振动试验加载装置,并在该型号机架振动试验中得到了工程应用。结论加载装置一阶固有频率较高,完全满足振动试验加载要求。

Design of Loading Device for Large Scale Liquid Rocket Engine Frame Vibration Test

Objective To design a loading device for vibration test of large-scale liquid rocket engine frame, so that the vi-bration test of this type of engine frame can be completed successfully. Methods On the basis of satisfying the connection strength, the layout of the structure such as the stiffener of the loading device was reasonably designed, and the loading device was optimized by the finite element method to further improve the first inherent frequency of the loading device. Results The design of loading device for vibration test is completed and applied in the vibration test of this type of frame. Conclusion The first inherent frequency of the loading device is higher, which fully meets the loading requirements of vibration test.