【摘要】 在汶川大地震中,变电站的大量电气设备受到了破坏。作为变电站的一种主要设备,断路器的抗震性能需要进行研究。根据地震中断路器的实际破坏情况,采用220kV单极瓷柱式断路器的足尺寸真型试件进行了地震模拟振动台试验研究。通过测定其在不同地面运动输入作用下设备关键部位的加速度、位移、应变等主要参数,研究了此断路器设备结构的动力特性、抗震性能以及支架的受力性能,并综合评定设备的抗震性能。试验结果表明:断路器的支柱瓷瓶根部处于复杂受力状态,是该设备抗震的薄弱环节;断路器的抗震设计要考虑下部支架对上部设备的动力放大效应。更多还原

【Abstract】 Many substation equipments were damaged during Wenchuan earthquake.The seismic behavior of circuit breaker,main component of substation,should be studied.In this paper,shake table tests on a real full size circuit breaker are carried out to study the seismic behavior of the equipment.Seismic responses of accelerations,displacements and the strains of the key parts of the equipment are measured under different ground motions with different levels of peak ground accelerations.These parameters are used to analyze the dynamic characteristics,seismic performance of the equipment as well as the load-carrying capacity of the equipment bracket.The test results show that the bottom of the post insulator is seismic vulnerable part of the equipment due to its complex stress state.Dynamic amplification effects of the equipment bracket should be considered in seismic design of the equipment.更多还原