【作者】 刘江； 黎胜；

【Author】 LIU Jiang;LI Sheng;School of Naval Architecture,State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology;

【机构】 大连理工大学工业装备结构分析国家重点实验室船舶工程学院；

【摘要】 粘弹性阻尼圆柱壳是典型的潜艇简化模型,对其振动特性研究是其辐射噪声研究的基础,基于Golla, Hughes,和MaTavish提出的粘弹性阻尼模型(下文统称GHM模型)对粘弹性阻尼圆柱壳进行精确建模分析具有重要的工程意义和军事价值。本文将GHM粘弹性阻尼模型与有限元软件ANSYS相结合,建立了粘弹性阻尼复合结构的模态分析和振动分析方法。首先,以粘弹性阻尼复合板结构为例,通过对比无阻尼、比例阻尼、结构阻尼和GHM粘弹性阻尼复合板的模态参数和振动响应,验证了GHM阻尼结构在振动特性上与比例阻尼和结构阻尼结构不同。其次,以GHM粘弹性阻尼圆柱壳为例,通过对不同阻尼层厚度的和不同阻尼敷设方式的粘弹性阻尼圆柱壳计算对比,研究了阻尼层厚度和阻尼层敷设方式对圆柱壳振动的影响,研究结果表明:增大阻尼层厚度或在结构模态振型的峰值位置敷设粘弹性阻尼层能有效增强结构的阻尼性能和减振效果。更多还原

【Abstract】 The viscoelastic damping cylinder shell is a typical model simplified from a submarine,and the research of vibration characteristics for a viscoelastic damping cylinder shell is the basis of its radiation noise research,so the accurate model of the viscoelastic damping cylinder shell based on the GHM method has important engineering significances and military values.The modal and vibration analysis method of viscoelastic damping structures are established using the GHM method and ANSYS in this paper.First,the viscoelastic damping plates were taken as examples in the study.The modal parameters and vibration responses of the nondamping,Rayleigh damping,structure damping and the viscoelastic damping plates using the GHM method were compared,which verified the differences of the viscoelastic damping plates using the GHM method between plates with Rayleigh and structure damping in vibration characteristics.Secondly,the vibration characteristics analysis model of the viscoelastic damping cylinder shell using the GHM method was established.The influences of thickness and configuration on vibration of a viscoelastic damping cylinder shell were studied by comparing shells with different damping layer thicknesses and different configurations.The results showed that increasing the thickness of the damping layer or laying a viscoelastic damping layer at the peak position of the structural vibration mode can effectively enhance the damping performance of the structure and the effect of vibration reduction.更多还原