# 左曙光,潘健,吴旭东,等.考虑动圈偏心的电动振动台等效电磁力计算方法[J].西安交通大学学报,2020,54(08):132-139.[doi:10.7652/xjtuxb202008017] 　ZUO Shuguang,PAN Jian,WU Xudong,et al.A Calculation Method of Equivalent Electromagnetic Force for Electrodynamic Shakers Considering Moving Coil's Eccentricity[J].Journal of Xi'an Jiaotong University,2020,54(08):132-139.[doi:10.7652/xjtuxb202008017] 点击复制 考虑动圈偏心的电动振动台等效电磁力计算方法 分享到：

54

2020年第08期

132-139

2020-08-10

## 文章信息/Info

Title:
A Calculation Method of Equivalent Electromagnetic Force for Electrodynamic Shakers Considering Moving Coil's Eccentricity

0253-987X(2020)08-0132-08

Author(s):
School of Automotive, Tongji University, Shanghai 201804, China

Keywords:

TM153; TH87
DOI:
10.7652/xjtuxb202008017

A

Abstract:
A calculation method of equivalent electromagnetic force considering moving coil's eccentricity is proposed to reflect the influences of the moving coil's electromagnetic forces on the lateral vibration of the electrodynamic shaker under offset loading conditions. Five factors including the moving coil's current, vertical position, flipping eccentricity angle, radial translating eccentricity distance and direction are considered. The problem that it is difficult to apply the existing orthogonal test design method to the situation with a mutual constraint among multiple factors' values is solved by calculating the radial eccentricity distance limit and assuming a virtual eccentricity distance. The concentrated electromagnetic force samples equivalent to the distributed electromagnetic forces of the moving coil are obtained through an electromagnetic finite element simulation. A neural network method is used to fit the samples and the equivalent electromagnetic forces in full moving conditions are obtained. Simulation results show that the radial equivalent electromagnetic force mainly increases with the increase of flipping eccentricity angle, especially increases rapidly at the high current condition. The relative errors of the equivalent electromagnetic forces obtained by the proposed method are within 10%. The equivalent electromagnetic forces in full moving conditions can be effectively obtained in real time while meeting the engineering requirement of calculation error. The problem that the electrodynamic shaker's electromagnetic-structure bidirectional coupling simulation can not be carried out due to the slow speed of the finite element method and the exact analytical method to calculate the equivalent electromagnetic force is well solved. The proposed method can also be applied to the calculation of forces on other similar moving systems.