一种传感器优化布置的多能量参数改进有效独立法

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (24) : 25-31.

论文

范恒承，余岭

作者信息 +

An improved effective independent method based on multi energy parameters for optimal sensor placement

FAN Hengcheng，YU Ling

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文章历史 +

摘要

为解决结构健康监测中的传感器优化布置问题，针对有效独立法存在的易丢失能量较大测点和能量法存在的测点易过于集中在能量较大位置从而导致结构重要模态信息丢失的不足，对有效独立法和能量法进行综合考虑，在有效独立法的基础上，同时引入模态动能和模态应变能修正有效独立法，提出一种考虑多能量参数的改进有效独立法（EI-MEP）。通过空间桁架结构的数值仿真算例以及矩形截面悬臂梁的实验验证，并结合评价准则对有效独立法及三种现有改进方法进行比对研究。结果表明，该方法具有良好的低阶模态识别的准确性，在选取少量传感器数目时具有优势，能保证测量振型向量具有较大的线性独立性，在五种方法中最为有效。

Abstract

To solve the problem that the effective independent method is easy to lose the higher energy measurement points and the energy method is easy to concentrate on the higher energy measurement points, which leads to the loss of the important modal information of the structure in the optimal sensor placement of structural health monitoring, an improved effective independent method with multi energy parameters (EI-MEP) was proposed by introducing the modified effective independent method of modal kinetic energy and modal strain energy.The EI-MEP method proposed in this paper, the effective independent method, and three existing improved methods were compared by using the evaluation criteria through numerical simulations on a space truss structure and experimental verifications on a cantilever beam with rectangular section.The results show that, the EI-MEP method not only has good accuracy in low-order modal identification, but also has advantages in selecting a small number of sensors, which can ensure the greater linear independence of the mode vector, and is the most effective method among these five optimal sensor placement methods.

导出引用

范恒承，余岭. 一种传感器优化布置的多能量参数改进有效独立法[J]. 振动与冲击, 2020, 39(24): 25-31

FAN Hengcheng，YU Ling. An improved effective independent method based on multi energy parameters for optimal sensor placement[J]. Journal of Vibration and Shock, 2020, 39(24): 25-31

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