论文部分内容阅读
针对空间飞行器中小模数齿轮寿命实验中振动测点定位难的问题,提出一种确定振动测点最佳位置方法。通过对齿轮系统进行有限元模态分析和谐响应分析,得到系统刚度分布,进而计算待选测点的谐响应幅值及矢量和,判定振动测点的理论最佳位置。搭建空间齿轮传动系统实验平台,采用峭度指标法对理论分析得到的最佳测点进行实验验证。实验表明:理论分析得到的9个最优测点中,8个测点理论分析结果和实验结果基本一致,说明方法的正确性。该方法为齿轮箱等复杂系统振动测点布置和优化提供理论依据,对空间飞行器驱动机构寿命实验研究有重要意义。
Aiming at the problem of locating the vibration measurement point in the experiment of small module gear life in spacecraft, a method of determining the best position of vibration measurement point is proposed. Through the finite element modal analysis and harmonic response analysis of the gear system, the system stiffness distribution is obtained, then the harmonic response amplitude and vector sum of the measured points to be measured are calculated, and the theoretical optimum position of the vibration measuring point is determined. The experimental platform of space gearing system is established, and the kurtosis index method is used to validate the best measuring points obtained from theoretical analysis. Experiments show that among the nine optimal measurement points obtained from the theoretical analysis, the theoretical analysis results of the eight measurement points are basically in agreement with the experimental results, indicating the correctness of the method. The method provides a theoretical basis for the arrangement and optimization of vibration measuring points of complex systems such as gearboxes and is of great significance to the experimental study on the life of the spacecraft driving mechanism.