实验模态分析快速计算方法与应用研究

谢小平1.2,姜彪1.2,雷飞1

振动与冲击 ›› 2015, Vol. 34 ›› Issue (24) : 46-52.

PDF(1947 KB)
PDF(1947 KB)
振动与冲击 ›› 2015, Vol. 34 ›› Issue (24) : 46-52.
论文

实验模态分析快速计算方法与应用研究

  • 谢小平1.2,姜彪1.2,雷飞1
作者信息 +

Experimental Modal Fast Calculation Method and Application Research

  • Xiao Ping Xie1.2,  Biao Jian,1.2,  Fei Le,1
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文章历史 +

摘要

提出联合模型降阶和智能参数优化的方法实现实验模态分析的快速计算。在最小二乘复频域法中采用间接模型降阶法实现系统特征矩阵的降阶。将决定参数识别效率的特征矩阵进行参数化描述并应用遗传算法对优化模型参数进行全局优化和缩减。采用差异化综合策略重点对自由度进行分步优化和缩减。对重卡驾驶室白车身进行实验模态分析快速计算方法的应用并证明新方法对计算效率提高的有效性。该方法为实现连续不间断激励下系统结构动力学特征在线检测和诊断打下了坚实基础。

Abstract

The model order reduction and parameter optimization combined methods were proposed to achieve rapid calculation of experimental modal analysis. The indirect model reduction was used in least square complex frequency domain method to achieve order reduction of system characteristic matrix. The optimization model was establish based on characteristic matrix parametric description. System’s degree of freedom were optimized and reduced using different comprehensive optimization strategy. The genetic algorithm was used to obtained global optimization and reduction of all parameters. The application of the fast calculation method of experimental modal analysis to heavy truck cab’s Body-in-White was proved to be effective to improve computational efficiency. This method establish a solid foundation to online detection and diagnosis to structure dynamics characteristics under continuous excitation situation.

关键词

实验模态分析 / 快速计算方法 / 模型降阶 / 差异化综合优化 / 重卡驾驶室

Key words

Experimental Modal Analysis / Fast calculation Method / Model order reduction / Differential Integrated optimization Strategies / Heavy-duty Truck Cab

引用本文

导出引用
谢小平1.2,姜彪1.2,雷飞1. 实验模态分析快速计算方法与应用研究[J]. 振动与冲击, 2015, 34(24): 46-52
Xiao Ping Xie1.2, Biao Jian,1.2, Fei Le,1. Experimental Modal Fast Calculation Method and Application Research[J]. Journal of Vibration and Shock, 2015, 34(24): 46-52

参考文献

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