论文部分内容阅读
建立点激励作用下附加阻振质量的有限平板理论分析模型,采用波动法和模态法的组合方法推导模型的振动响应。以均方速度为指标分析板系统附加阻振质量后,阻振质量对激励板的振动能量向接受板传递的阻抑规律,讨论阻振质量的质量比等参数对板系统振动阻抑效果的影响。结果表明,当附加条形阻振质量时,阻振质量在低频段对板系统的振动能量传递具有较好的阻抑效果。当附加离散阻振质量块时,阻振质量在低频段对板系统的振动不但没有阻抑效果,反而还会放大板系统的振动;在高频段,随着阻振质量质量比的增加,条形和离散阻振质量块对板系统振动的阻抑效果更好。
A finite-plate theoretical analysis model of additional vibration-proof mass under point excitation is established. The vibration response of the model is derived by a combination of wave and modal methods. Taking the mean square velocity as an index, the damping law of the vibration energy of the plate to the receiving plate is analyzed after the additional damping quality of the plate system is obstructed. The effect of the mass ratio of the vibration- influences. The results show that the damping quality of the strip at the low frequency band has better restraining effect on the vibration energy transfer of the slab system when the mass of the strip is added. When the discrete mass damper is attached, the vibration quality of the damper at the lower frequency band not only does not suppress the vibration of the plate system, but also amplifies the vibration of the plate system. At the high frequency, as the mass ratio of the vibration-damping mass increases, The damping of the vibration of the plate system by the shaped and discrete damped mass is better.