【摘要】 为研究用于电气设备金属减震器的力学性能和减震效果,进行了单个减震装置的拉压循环加载试验和加装减震装置的1 000 kV避雷器振动台试验。试验结果显示金属减震装置的本构关系符合Wen模型,表现出良好的耗能特性。在地震台试验中,减震装置的应用使设备基频从1.61 Hz降低至1.22 Hz,阻尼比由1.73%增大至4%,改善了设备的动力特性。在0.4×9.8 m/s2等级地震荷载下设备应力为22.6 MPa,安全系数为2.0,减震装置对应力的减震率达60%,显著提高了设备的地震安全性。金属减震装置通过金属芯体的塑性变形耗散地震动能量,减小地震响应从而提高了设备的抗震性能,为1 000 kV电气设备应用于我国高抗震设防烈度区提供了技术支撑。更多还原

【Abstract】 In order to study the mechanical properties and damping effect of metal damper device used for electrical equipment, we carried out cyclic loading tests of single damper device and shaking table tests of a 1 000 kV surge arrester with metal dampers. The test results show that the constitutive relation of the metal damper conforms to the Wen hysteresis model, reflecting a high energy dissipation capacity. In the shaking table tests, the application of metal damper decreases fundamental frequency of the equipment from 1.61 Hz to 1.22 Hz and increases the damping ratio from 1.73% to 4%, which shows improvement in dynamic properties of the equipment. Under 0.4×9.8 m/s2 level seismic load, the stress of the equipment is 22.6 MPa, the safety factor is 2.0, and the stress decreasing rate of the damper device is as high as 60%, which significantly improve the safety of the equipment in earthquake events. Metal damper device dissipates earthquake energy by plastic deformation of the metal core, which decreases seismic response of equipment and achieves a better seismic performance. The results provide technical supports for the installation of 1 000 kV voltage level electrical equipment in high seismic intensity zone in China.更多还原