基于灵敏度分析的转向架构架有限元模型修正

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (3) : 181-186.

论文

刘乐天，李凡松，宋烨，刘潮涛,邬平波

作者信息 +

Finite element model updating of bogie frame based on sensitivity analysis

LIU Letian, LI Fansong, SONG Ye, LIU Chaotao, WU Pingbo

Author information +

文章历史 +

摘要

准确的构架有限元模型可以为转向架前期设计和后期优化提供保障，从而避免激励与构架模态共振发生事故，但构架有限元建模产生误差是不可避免的。为获得准确的有限元模型，本文推导了灵敏度矩阵加权算法，基于该算法，以构架模态试验数据为基准，以焊缝区等效弹性模量和主要板材厚度为修正参数，以模态频率和振型MAC值误差最小化为修正目标，对转向架构架有限元模型进行修正，修正结果显示与频率试验值误差控制在1%以内。另外，研究发现构架MAC值修正效果不明显，仅考虑频率修正项时依然可以获得准确模型。

Abstract

Accurate bogie frame finite element model can provide guarantee for the early design and later optimization of the bogie, so as to avoid accidents caused by excitation and bogie frame modal resonance, but the error of bogie frame finite element modeling is inevitable. In order to obtain an accurate finite element model, this paper deduces the sensitivity matrix weighting algorithm. Based on this algorithm, the finite element model of bogie frame is modified with the frame modal test data as the benchmark, the equivalent elastic modulus at the weld and the main plate thickness as the correction parameters, and the minimization of the error of modal frequency and vibration mode MAC value as the correction goal, The correction results show that the error with the frequency test value is controlled within 1%. In addition, it is found that the MAC value correction effect of the architecture is not obvious, and the accurate model can still be obtained when only the frequency correction term is considered.

导出引用

刘乐天，李凡松，宋烨，刘潮涛, 邬平波. 基于灵敏度分析的转向架构架有限元模型修正[J]. 振动与冲击, 2023, 42(3): 181-186

LIU Letian, LI Fansong, SONG Ye, LIU Chaotao, WU Pingbo. Finite element model updating of bogie frame based on sensitivity analysis[J]. Journal of Vibration and Shock, 2023, 42(3): 181-186

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