磁流变橡胶材料隔声性能数值模拟

发布时间：2018-03-12 16:11

本文选题：磁流变弹性体　切入点：橡胶材料　出处：《湘潭大学》2017年硕士论文　论文类型：学位论文

【摘要】：橡胶材料因其优良的降噪特性,广泛应用于建筑、工业、军事等领域,并取得了良好的效果。然而传统橡胶材料只能在一定范围的声音频率起到良好的隔声效果,不能起到宽频减噪的效果。为此,许多学者为设定一款能够在宽频率内都起到良好隔声效果的隔声材料进行了广泛的分析探索。磁流变弹性体(MRE)是一类可以通过外加磁场改变其力学性能的智能材料。磁流变橡胶材料能够通过改变外加磁场强度达到增大其最佳隔声效果频率范围的目的,优化提高了其隔声特性。本论文基于磁流变弹性体分析探讨磁流变橡胶材料的隔声特性,主要包括以下几个方面:1)应用复杂网络的理论和方法来研究无磁场下橡胶材料(真空孔隙)的隔声特性,应用COMSOL软件分别模拟了内部孔隙为真空时的不同孔隙率下的橡胶材料的隔声性能,同时还分析探讨了橡胶材料的隔声量与基于真空孔隙的复杂网络三个主要的基本拓扑统计参数(平均度、平均聚类系数、平均最短路径长度)之间的联系。2)在前一步的工作基础上,将真空孔隙设定为空气孔隙,应用COMSOL软件模拟分析其不同孔隙率下的橡胶材料(空气孔隙)的隔声性能,并分析探讨了其隔声量与基于空气孔隙的复杂网络三个主要的基本拓扑统计参数(平均度、平均聚类系数、平均最短路径长度)之间的联系。3)将孔隙设置为磁粉粒子(羟基铁粉),基于均匀化的方法,应用COMSOL软件模拟计算出各不同磁通密度下的材料微小变形条件下的等效平均应力,基于此计算出该材料在各不同磁通密度下的等效弹性模量,以此基础上模拟分析各磁通密度下磁流变橡胶材料的隔声特性。
[Abstract]:Rubber materials have been widely used in construction, industry, military and other fields because of their excellent noise reduction characteristics. However, the traditional rubber materials can only play a good sound insulation effect in a certain range of sound frequency. It can't reduce the noise of broadband. For this reason, Many scholars have made extensive analysis and exploration on the design of sound insulation material which can achieve good sound insulation effect in wide frequency. Magnetorheological elastomer (Mre) is a kind of intelligent material which can change its mechanical properties by applying magnetic field. Materials. Magnetorheological rubber materials can increase the frequency range of their optimum sound insulation effect by changing the applied magnetic field strength, Based on the analysis of magneto-rheological elastomer, the sound insulation characteristics of magneto-rheological rubber materials are discussed. Mainly including the following aspects: 1) applying the theory and method of complex network to study the sound insulation characteristics of rubber materials (vacuum pores) without magnetic field. The sound insulation properties of rubber materials with different porosity in vacuum were simulated by COMSOL software. At the same time, three main basic topological statistical parameters (average degree, average clustering coefficient) of rubber material sound insulation and complex network based on vacuum pore are analyzed and discussed. The relationship between the average shortest path length). 2) based on the work of the previous step, the vacuum pore is set as air pore, and the sound insulation property of rubber material (air pore) under different porosity is simulated by COMSOL software. The three basic topological statistical parameters (average degree, average clustering coefficient) of the sound insulation and the complex network based on air porosity are analyzed and discussed. The relation between the average shortest path length. 3) set the pore as magnetic particle (hydroxyl iron powder), based on the method of homogenization, using COMSOL software to simulate and calculate the equivalent average stress of the material under different magnetic flux density under the condition of tiny deformation. Based on this, the equivalent elastic modulus of the material at different flux densities is calculated, and the sound insulation characteristics of MRR materials under different flux densities are simulated and analyzed.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ330.1;O157.5

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