多约束阻尼梁振动抑制机理分析与试验验证  

Analysis and Experimental Verification of Vibration Suppression Mechanism in Multi-Constrained Damping Beams

作　　者：樊仁才 丛子龙 秦家俊 陈荣[2] FAN Rencai;CONG Zilong;QIN Jiajun;CHEN Rong(Shanghai Marine Equipment Research Institute,Shanghai 200031,China;National and Local Joint Engineering Research Center for Reliability Analysis and Testing of Electromechanical Products,Zhejiang University of Science and Technology,Hangzhou 310018,China)

机构地区：[1]上海船舶设备研究所,上海200031 [2]浙江理工大学机电产品可靠性分析与测试国家地方联合工程研究中心,杭州310018

出　　处：《船舶工程》2024年第12期75-80,147,共7页Ship Engineering

摘　　要：利用约束阻尼层阻尼耗散吸振机理,在基体梁上敷设阻尼层和约束层形成多约束阻尼梁。基于振动传递矩阵法,推导其振动传递函数。通过数值分析探究不同阻尼比、厚度及抗弯刚度的约束阻尼层对梁的振动衰减影响,并利用锤击模态法进行试验验证,与仿真分析结果比对可得:多约束阻尼层可以有效地吸收基体梁上多余的振动能量,尤其是基体梁在固有频率处的振动幅值。最后,在工程应用中敷设多约束阻尼层,使得基座结构振动响应取得了5.4 dB的减振效果。By utilizing the damping dissipation and absorption mechanism of the constrained damping layer,a multi-constrained damping beam is formed by laying damping layers and constraining layers on the base beam.Based on the vibration transfer matrix method,the vibration transfer function of the multi-constrained damping beam is derived.Then the influence of different damping ratios,thicknesses,and bending stiffnesses of the constrained damping layer on the vibration attenuation of the constrained damping beam is numerically investigated,and experimental validation is carried out using the modal hammer test method,and comparison with the simulated analysis results is made.It is concluded that the multi-constrained damping layer can effectively absorb the excess vibration energy on the base beam,especially the vibration amplitude at the natural frequency of the base beam.Finally,in engineering applications,after the installation of the multi-constrained damping layer,the structural vibration response of the base achieves a reduction of 5.4 dB.

关 键 词：约束阻尼层 有限元方法 传递矩阵法 试验验证 

分 类 号：TB53[理学—物理] O327[理学—声学]