制动盘自由模态仿真与试验对比及模态置信度研究

建立了制动盘有限元模型,仿真得到制动盘前五阶弹性模态;对制动盘进行模态试验,阐述了制动盘模态试验的参数选择、测点布置、模态置信度判断准则,并通过综合频率响应函数和模态置信准则验证了试验结果的可靠性;仿真与试验得到的制动盘模态振型、模态频率等结果误差很小,二者基本一致。结果表明,所建立的制动盘有限元模型可用于约束状态下制动盘振动和噪声性能的预测。

Modal confidence analysis and comparison of brake disc based on simulation and experiment under free conditions

The finite element model of the brake disc was established and the first five elastic modes of the brake disc are obtained by simulation The modal experiment was carried out and the research on experimental parameter selection, measurement point placements and modal judgment criteria were conducted. The correctness of the experimental results was verified by the fitted frequency response function curve and the modal assurance criterion. The comparison between simulation and experiment demonstrates that the modal shapes and frequencies obtained by the simulation model coincide with the experimental results basically. The research indicates that the finite element model of the brake disc can be used to predict the vibration and noise characteristics of the brake disc under constrained conditions.