结构对变形镁合金减振性能的影响

Influence of Structure on Vibration Damping Capacity of Deformation Magnesium Alloy

采用有限元模拟对不同筋板布置方式的AZ31镁合金型材进行了瞬时动态数值模拟,并通过激励响应特性对AZ31镁合金型材的减振效果进行评估。结果表明:相同激励下,三角形筋板布置的镁合金型材减振性能优于其他形状筋板布置的型材,其中矩形筋板布置的镁合金型材减振性能最差。而后对模拟结论进行实验验证,实验结论与模拟相一致。最后,结合实验结果,对矩形筋板的布置方式提出优化改进方案,通过进一步的模拟计算发现型材整体变形、受力等都得到有效改善。

The finite element simulation method was used to study the instantaneous dynamic response in the same excitation for AZ31 magnesium alloy profiles with different reinforcing plate. According to the excitation response characteristic of AZ31 magnesium alloy profiles, the vibration damping performance was evaluated. The results show that the magnesium alloy profiles with triangle reinforcing plate have a better damping performance than the magnesium alloy with rectangular reinforcing plate. The vibration experimental research was used to study the damping performance of the magnesium alloy profiles with triangle reinforcing plate and rectangular reinforcing plate. Experimental results indi- cate that the simulated conclusion is consistent with the experiment. In order to explain the research results that magnesium alloy profiles with rectangular reinforcing plate had a low quality in damping performance, the improvement optimization scheme was put forward. The subsequent simulation results show that the section deformation and stress performance of the AZ31 magnesium alloy profiles are all effectively improved as expected.