ISO 18437-5:2011 机械振动与冲击 粘弹性材料动态机械性能的描述 第5部分：在测量和有限元分析之间对比基础上的泊松比

标准编号：ISO 18437-5:2011

中文名称：机械振动与冲击 粘弹性材料动态机械性能的描述 第5部分：在测量和有限元分析之间对比基础上的泊松比

英文名称：Mechanical vibration and shock — Characterization of the dynamic mechanical properties of visco-elastic materials — Part 5: Poisson ratio based on comparison between measurements and finite element an

发布日期：2011-04

标准范围

ISO 18437-5:2011规定了两种估算各向同性粘弹性或多孔弹性材料泊松比或/和弹性模量的方法，用于线性有限元法（FEM）计算机程序或其他数值方法，以解决复杂几何形状粘弹性结构中的振动或声学问题。该方法基于两端有粘结边界条件的圆盘状试样的力-挠度或刚度特性测量值与作为泊松比函数的这些条件的有限元计算值之间的比较。单样本或双样本测量方法的选择取决于泊松比是单独确定还是与弹性模量一起确定。有时，这些材料被认为是不可压缩的，表现为非线性，尤其是在大的静态变形中。许多商业代码可用于解决此类问题。ISO 18437-5:2011中的情况并非如此，在该标准中，仅考虑典型振动问题中观察到的小变形，因此，线性FEM代码足够且更方便。在ISO 18437-5:2011中，在ISO/TC 108的框架内，术语动态机械性能指基本弹性性能的测定，例如复杨氏模量和泊松比，作为温度和频率的函数。ISO 18437-5:2011适用于振动隔离器中使用的弹性材料，以减少:a）音频振动对结构的传输，例如辐射流体传播的声音（空气传播、结构传播或其他）；b） 低电压传输-频率振动，例如，当振动太严重时，可作用于人或对结构或设备造成损坏。通过ISO 18437-5:2011中概述的测量方法获得的数据，以及ISO 18437-2至ISO 18437-4中进一步详述的测量方法，可用于:1）高效隔振器的设计；2） 为给定设计选择最佳弹性材料；3） 通过隔离器传递振动的理论计算；4） 产品开发过程中的信息；5） 制造商和供应商提供的产品信息；6） 质量控制。

ISO 18437-5:2011 specifies two methods for estimating Poisson ratio or/and elastic modulus for isotropic visco-elastic or porous-elastic materials for use in linear finite element method (FEM) computer programs or other numerical approaches to vibrational or acoustic problems in visco-elastic structures of complicated geometry. The method is based on comparison between measurements of force-deflection or stiffness characteristics for disc-shaped specimens, with bonded boundary conditions at both ends, and FEM calculations of those conditions as a function of Poisson ratio. The choice of the single-sample or two-sample measurement method depends on whether the Poisson ratio is to be determined alone or together with the elastic modulus. Sometimes these materials are considered to be incompressible and behave non-linearly especially in large static deformations. Many commercial codes are available to solve such problems. This is not the case in ISO 18437-5:2011, where only small deformations observed in typical vibration problems are considered and, hence, linear FEM codes are adequate and more convenient.For the purposes of ISO 18437-5:2011, and within the framework of ISO/TC 108, the term dynamic mechanical properties refers to the determination of the fundamental elastic properties, e.g. the complex Young modulus and Poisson ratio, as a function of temperature and frequency.ISO 18437-5:2011 is applicable to resilient materials that are used in vibration isolators in order to reduce: a) transmission of audio frequency vibrations to a structure, e.g. radiating fluid-borne sound (airborne, structure-borne, or other); b) transmission of low-frequency vibrations which can, for example, act upon humans or cause damage to structures or equipment when the vibration is too severe.The data obtained with the measurement methods that are outlined in ISO 18437-5:2011 and further detailed in ISO 18437-2 to ISO 18437-4 can be used for: 1) design of efficient vibration isolators; 2) selection of an optimum resilient material for a given design; 3) theoretical computation of the transfer of vibrations through isolators; 4) information during product development; 5) product information provided by manufacturers and suppliers; 6) quality control.

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