核级应急柴油发电机组抗震试验研究 A Study of Seismic Testing for Nuclear Emergency Diesel Generator

本文中，我们采用试验方法对核级应急柴油发电机组进行抗震鉴定。使用连续白噪声方法，测得机组在三正交轴上的固有频率和阻尼比。根据业主提供的楼板反应谱，生成人工地震波，对机组三正交轴向同时输入模拟地震加速度时程进行激振，分别进行了5次OBE (运行基准地震)和1次SSE (安全停堆地震)地震模拟振动台试验，试验表明机组各项性能指标在抗震试验前后无明显变化，抗震性能满足要求。 In this paper, we do the seismic identification of nuclear emergency diesel generator by test method. Dynamic characteristics including orthogonal tri-axial fundamental frequencies and equivalent damping ratios were measured by using the white noise scanning method. Artificial seismic waves were generated according to the floor acceleration response spectrum provided by the owners. Furthermore, five OBE and one SSE shaking table tests for emergency diesel generator were done by using the artificial seismic waves as seismic inputs along the orthogonal tri-axial simultaneity. The results show that the emergency diesel generator satisfies the seismic requirements and there is no obvious change of its performances before and after the earthquake test.