冲击荷载作用下整体隔震模型动力响应研究

Study on dynamic response of global vibration isolation model under impact load

爆炸荷载产生的冲击震动会对建(构)筑物内的人员和设备造成损伤,由鼓型钢丝绳隔震器作为承重元件的整体隔震结构,可以有效地减少冲击荷载的输入。为研究整体隔震结构在单向冲击荷载下的动力响应和隔震性能,进行了试验研究。同时还对试验的整体钢结构各个组成构件建立了有限元模型,运用LS-DYNA动态分析程序对其进行分析,将其与试验结果进行比较,并分析探讨了二者之间产生误差的原因。结果表明,整体隔震结构具有较好隔震性能,数值模拟能够反应整个冲击试验动态变化响应,模拟与试验结果吻合较好。

The impact vibration caused by explosion load will damage the personnel and equipment in the structure.The global vibration isolation structure supported by the drum⁃shaped steel wire rope isolators can effectively reduce the input of the impact load.In order to study the dynamic response and vibration isolation performance of global vibration isolation structure under unidirectional impact load,model tests were carried out.At the same time,the finite element model of each component of the tested integral steel structure model was established,and the finite element model were carried out by using LS⁃DYNA dynamic analysis program,which were compared with the test results.And the cause of the error between simulation and test was analyzed.The results show that global vibration isolation structure has good isolation performance,and the dynamic response of the whole impact test can be simulated by numerical simulation.The simulation results show uniformity with the test results.