板式电涡流TMD有限元模拟与参数优化

Finite Element Simulation and Parameter Optimization of Plate Eddy Current TMD

针对一种板式电涡流调谐质量阻尼器(TMD)进行磁路及参数的优化分析。利用三维有限元电磁瞬态场分析永磁铁分布方式及主要参数——气隙、永磁铁厚度、导体板厚度对电涡流TMD性能的影响,通过线性回归方程及其导数观察阻尼力做功的大小随主要参数变化的规律。结果表明:当阻尼器采用永磁铁磁极交替分布时,阻尼器的工作效率最高;在给定取值范围内,阻尼力做功的大小随气隙呈负指数衰减,随永磁铁厚度呈对数增加,随导体板厚度呈指数增加;各主要参数建议取值范围:气隙大小取7 mm以内,永磁铁厚度在15 mm以内,导体板厚度在给定区间取最值。

Optimization analysis of magnetic circuit and parameters is carried out for a plate-type eddy current tuned mass damper(TMD). The effects of the permanent magnet distribution mode and the main parameters including air gap,permanent magnet thickness and conductor plate thickness on the eddy current TMD performance are analyzed using three-dimensional finite element electromagnetic transient fields. The law of damping force work with the main parameters was observed by linear regression equation and its derivative.The results show that the dampers work most efficiently when the permanent magnet pole is distributed alternately. Within the given value range,variation of the damping force decayed negatively with the air gap,logarithmically increased with the permanent magnet thickness,and exponentially increased with the conductor plate thickness. The recommended values of the main parameters are as follows:the air gap size is within 7 mm,the permanent magnet thickness is within 15mm,and the conductor plate thickness takes the maximum value in the given interval.