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铅挤压型阻尼器初始刚度大,屈服强度高,耗能能力好,被广泛应用于结构减震控制中。然而由于研究者对铅金属力学性质的研究及模拟不足,常常导致数值模拟结果与试验结果存在不同程度的差异。对一种新型的铅-挤压型阻尼器(LED)——复合式金属型阻尼器(MAB)进行试验研究,采用DEFORM-3D软件对该型阻尼器进行较为系统地数值仿真分析。通过对比分析试验结果与数值仿真结果可知:复合式金属型阻尼器具有优良的耗能能力,且在大位移下具备良好的结构限位能力,挤压区域尺寸、轴突高度、轴突与阻尼器腔体间的间隙等参数显著影响其耗能能力;有限元仿真过程中,铅金属的力学模型的选择对仿真结果有显著影响,DEFORM-3D在金属耗能器仿真模拟中的应用效果良好。
Lead squeeze-type damper initial stiffness, high yield strength, energy dissipation capacity, is widely used in structural damping control. However, due to the researches on the mechanical properties of lead metal and the lack of simulation, the results of numerical simulation often differ from the experimental results to some extent. A new type of lead - squeeze type damper (LED) - composite metal damper (MAB) was tested and the system was numerically simulated by DEFORM - 3D software. By comparing the experimental results with the numerical simulation results, it can be seen that the composite metal damper has excellent energy dissipation capacity and good structural limit ability under large displacement. The size of the extrusion area, the height of the axon, the axon and the damping In the process of finite element simulation, the choice of mechanical model of lead metal has a significant effect on the simulation results. The application of DEFORM-3D in the simulation of metal energy dissipater has a good effect .