Study on Mass Acceleration Distribution for Dynamic Force Analysis
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摘要: 本文基于相对法正弦力校准原理,通过理论推导、实验测试及仿真分析对半径为70 mm、高为30 mm的铝质圆柱状质量块的轴向及径向加速度分布规律进行研究。首先,推导并得到了质量块各个位置的加速度分布规律;其次,在各特征点对质量块加速度分布进行了实际测试;最后,对质量块进行建模仿真,得到其轴向及径向加速度分布情况,并与理论与仿真的结果进行对比。轴向方面,理论、仿真及实验三层面的结果均非常吻合;径向方面,仿真及实验结果十分吻合,今后可用于对绝对刚度假设进行修正。Abstract: Based on the principle of relative sinusoidal force calibration, this paper studied the axial and radial acceleration distribution of aluminum cylindrical mass with radius of 70mm and height of 30mm through theoretical derivation, experimental test and simulation analysis. Firstly, the acceleration distribution law of each position of the mass was deduced and obtained; Secondly, the acceleration distribution of mass was tested at each characteristic point; Finally, the mass was modeled and simulated to obtain the axial and radial acceleration distribution, and the results were compared with the theoretical and simulation results. In the axial direction, the theoretical, simulation and experimental results are in good agreement; In terms of radial, the simulation and experimental results are in good agreement, which can be used to modify the absolute stiffness assumption in the future.
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