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基于试验模态分析,考察船用加强筋板架模型在不同敷设位置,全部进行约束阻尼等处理方式对系统动态特性的影响。试验结果表明:(1)板架表面进行约束阻尼处理后,在不同测点位置,结构表面振动均有不同程度的衰减;(2)阻尼减振作用与激励源传播距离有关,在激励点位置,阻尼减振效果不佳;(3)阻尼减振效果与激励方式、阻尼敷设位置均有一定关系,局部阻尼处理在特定情况下可达到与全部阻尼处理相当的减振效果。
Based on the experimental modal analysis, the influence of the handling modes of the ship stiffener plate model on the dynamic characteristics of the system at different laying locations and constraint damping are investigated. The test results show that: (1) After the restraint damping treatment on the surface of the pallet, the vibration of the structure surface has different degrees of attenuation at different measuring points; (2) The damping and damping effect is related to the propagation distance of the excitation source, , Damping damping effect is not good; (3) damping damping effect and incentive mode, damping laying position has a certain relationship, local damping process under certain conditions can achieve the damping effect and all the damping effect.