基于靶向能量转移的非线性吸声结构研究进展

Study Progress of Nonlinear Sound Absorption Structure Based on Targeted Energy Transfer

低频吸声结构的研究已非常深入,但依然存在频带较窄的问题,而基于靶向能量转移的非线性耦合吸声结构,没有特定的固有频率,具有较宽的吸声频带。但靶向能量转移只有受外界激励时在一定范围内才发生,称为期望工作区。文章研究非线性膜耦合结构的参数对期望工作区的影响,通过优化结构参数,扩大期望作用区。

The research of low frequency sound absorption structure has been very thorough,but there is still a problem of narrow frequency band.However,the non-linear coupled sound absorption structure based on targeted energy transfer has a wider sound absorption band because of its non-characteristic natural frequency.However,targeted energy transfer occurs only in a certain range of external excitation,which is called desired working zone.Therefore,the researchers expand the desired working zone by studying the influence of the parameters of the nonlinear membrane coupling structure on the desired working zone and optimizing the structural parameters.