MR-TMD结构阻尼振动系统的参数影响分析

提出一种新型的结构振动控制的半主动质量驱动器（MR-TMD）系统,采用半主动控制算法仿真分析了在简谐载荷激励下MR-TMD系统对结构振动控制的可行性和有效性,比较MR-TMD、调谐质量阻尼器（TMD）及主动质量驱动器（AMD）对同一模型结构的幅频特性.分析了磁流变阻尼器的最大出力、最小出力及可调倍数对MR-TMD受控系统的影响.仿真结果表明,MR-TMD作为一种半主动质量驱动器能有效降低结构反应,在简谐载荷作用下半主动MR-TMD控制系统比具有相同质量块参数的最优TMD控制系统具有更好的减振性能,且比TMD受控系统有更大的减振频带宽度.

Parameters influenced analysis of MR-TMD structural damping vibration system

A new semi-active MR-TMD(magnetorheological tuned mass dampers) actuator system for structural vibration control was proposed,which needn't the complicated,huge and costly hydraulic actuator system. The feasibility and effectiveness of MR-TMD for structural vibration control under harmonic excitations were simulated and analyzed by using the semi-active control algorithms proposed by the authors. Magnitude-frequency property of TMD,semi-active MR-TMD and AMD were compared by using the same model structure. The maximum and minimum damping force and the adjustable ranges influencing on MR controlled system were analyzed. The optimum parameters are given for MR-TMD control system. Numerical simulations show that MR-TMD system can effectively reduce the reaction by the structure,MR-TMD control system is prior to the optimum TMD control system with the same mass block parameters,and prior to the optimum TMD system with the same mass parameters as a semi-active mass actuator,and it so has wider frequency. The structural reaction of the controlled system is reduced by 15%;the standard variation is reduced by 58% compared with the TMD controlled system;the static magnitude controlled structure is greatly reduced by MR-TMD. The authors propose that it is essential for MR-TMD vibration control system to choice the reasonable parameters such as the maximum damping force,the minimum damping force and the adjustable multiple of MR damper. The performance with the reasonable damping parameters of MR damper excelled TMD and the control effect is close to AMD.