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摘要为了解决机床工作时产生的振动问题，目前主要是寻找更优的材料替代传统铸铁材料以期提高阻尼性能。树脂矿物复合材料使用寿命长、热稳定性好、阻尼性能优异，生产过程无毒副气体产生、环境负担小，性能满足机床减振及恶劣工作环境要求的同时，具有低消耗，高产出的特点。本文以树脂为粘结剂，以花岗岩颗粒为骨料制备了树脂矿物复合材料，并采用模态分析法测定了其阻尼比。模态分析法充分考虑了树脂矿物复合材料受激振动的各阶振型及其对应的频率，据此分析了树脂矿物复合材料阻尼比随组分含量变化的规律。结果表明：与铸铁、花岗岩等传统机床材料相比，树脂矿物复合材料静刚度与之接近，但是其固有频率有效提高，并明显降低床身在受到外界激励时的动态响应，阻尼性能显著提高。30714
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关键词 树脂矿物复合材料 模态分析 阻尼比 抗振减噪
毕业论文设计说明书外文摘要
Title Research on Damping Property of Resin Mineral Composite Materials
Abstract
One of the feasible ways to reduce the vibration of machine tool is the adoption of bed materials with excellent performance.The resin mineral composite materials have advantages on other traditional materials that they have high damping coefficient,long-term good dimensional stability,low coefficient of thermal expansion.No poisonous gas produced,no rust,no pollution to the environment,low consumption and high output in the production process.In this paper, resin was used as binder and granite particles as aggregate to prepare resin mineral composite materials, and the damping ratio of the composite was determined by using modal analysis.Modal analysis fully considers the various vibration modes and corresponding frequency in the forced vibration of resin mineral composite materials, and I analyzed its damping ratio with variation of component content.Compared with the traditional cast iron materials , the stiffness of resin mineral composite materials is not far different from cast iron materials, but its inherent frequency is much higher,and the dynamic response is profoundly reduced when the body is subjected to external excitation.
Keywords Resin mineral composite materials Modal Analysis Damping Ratio Noise Reduction
目 次
1 引言（绪论） 1
1.1 树脂矿物复合材料 1
1.2 几种基本阻尼模型及其表征 2
1.2.1 几种基本阻尼模型 2
1.2.2 阻尼性能的表征 4
1.3 研究的内容和意义 5
1.3.1 研究的内容 5
1.3.2 研究的意义 5
2 实验 6
2.1 原材料 6
2.1.1 树脂系统 6
2.1.2 骨料系统 8
2.1.3 辅助系统 9
2.2 实验设计与试件制备 10
2.3.1 配合比设计 10
2.3.1 试件制备 10
2.3 成型与养护方法 11
2.3.1 成型方法 11
2.3.2 养护方法 12
2.4 材料阻尼比测试 13
3 结果与讨论 15
3.1 树脂矿物复合材料的阻尼来源与耗能模型 15
3.1.1 阻尼来源 15