用于高压电气设备的剪切型铅减震器性能影响研究
Performance of a Shear Lead Damper Applied to High-voltage Electrical Equipment

作为重要的电气设备抗震技术产品，剪切型铅减震器能够有效降低电气设备的地震响应。但随着电气设备电压等级的提高，设备结构规格不断增大，其地震作用力显著增大，对电气设备安装的减震器性能提出了更高要求。通过剪切型铅减震器的低周反复加载试验研究，分析其受力模型，对比减震器在不同加载频率下的力学和阻尼耗能性能，并根据试验结果提出优化工艺，进一步提高减震器性能，为电气设备抗震能力的提高提供更可靠的技术保障
An excellent electrical technology product, electrical porcelain is widely used in power equipment. But during several earthquake research studies, we found that porcelain power equipment is highly vulnerable to earthquakes and any anti-seismic performance is difficult to enhance by means of structure optimization. As an important piece of seismic technology, the shear lead damper can effectively reduce the seismic response of electrical equipment. Nevertheless, the larger the electrical equipment, the stronger the seismic force that the electrical equipment can bear, which leads to a high demand for lead dampers. A low cycle reverse-loading experiment on a shear lead damper was conducted and the mechanical and damping characteristics at loading frequencies of 1 Hz, 3 Hz, 5 Hz and 7 Hz analyzed. The hysteresis curves at different loading frequencies indicated that the restoring force model of the shear lead damper conforms to bilinear model modality; the pre-yield stiffness was 114.52~119.43 kN/mm, the post-yield stiffness 1.05~1.17 kN/mm, and the effective damping ratio value 40%~43%. When the loading frequency increased to 5 Hz or 7 Hz, the mechanical and damping properties of the shear lead damper were basically consistent with those at 1 Hz and 3 Hz. The initial and maximum yield forces,and the hysteresis loop area of the test increased with increased loading frequency, but the effective damping ratio was unaffected. The hysteresis loops from the 4 tests were not full and round, which affected the dissipation capacity of the damper and may be caused by the processing technology. According to the test results, the processing technology was optimized. The test hysteresis loop of an optimized damper was full, and the indexes of mechanical properties and energy consumption, and the damping characteristics all increased. All of the above can improve the performance of the damper and provides reliable technical support for the improvement of the seismic capacity of electrical equipment.