【作者】 白长青； 许庆余；

【Author】 BAI Chang-qing, XU Qing-yu(Xi’an Jiaotong University, Xi’an 710049, China)

【机构】 西安交通大学；

【摘要】 本文通过数学变换,把多自由度结构中控制某一阶模态的TMD设计问题简化为设计单自由度结构TMD的问题,给出了三相叠积电抗器的简化设计过程。通过对单自由度结构中TMD对主结构减震性能影响的分析,发现简谐基底激励作用下的TMD最优参数并非减震控制的最佳选择,主要区别是减震控制时TMD的最优阻尼比要显著小于简谐基底激励下的最优阻尼比。于是,文中介绍了可以方便地求出减震控制TMD最优参数的方法并确定了三相叠积电抗器中TMD的抗震最优参数,通过实际地震波下的响应分析,证明所设计的TMD有十分明显的减震效果。更多还原

【Abstract】 In this paper, it is suggested that the TMD design to control a single mode of a MDOF structure may be transformed into the design of a TMD for a SDOF structure with mathematical manipulation. The TMD design of a series reactor is given to illustrate this design procedure. According to the seismic responses analysis of SDOF structure-TMD system with detuning on some of the TMD parameters, it is shown that the optimum TMD parameters under the harmonic base excitation are not the exact optimization for seismic protection. The optimum damping ratio of TMD is the main difference each other. Then, a numerical approach is presented to solve the optimum TMD parameters under the seismic random excitations and the optimal TMD of the series reactor are obtained effectively. The control effect analysis proves that the designed TMD is able to reduce the seismic responses of the series reactor obviously.更多还原