| 钢轨扣件减振橡胶动态特性分析 |
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| 引用本文： | 刘艳,罗雁云.钢轨扣件减振橡胶动态特性分析[J].中南大学学报(自然科学版),2011(9). |
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| 作者姓名： | 刘艳 罗雁云 |
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| 作者单位： | 同济大学铁道与城市轨道交通研究院; |
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| 基金项目： | 国家科技支撑重大专项(2009BAG11B02) |
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| 摘 要： | 基于黏弹性材料动态恢复力由非线性弹性恢复力和非线性阻尼力叠加而成的理论基础,运用理论与动态试验相结合的方法,提出一种钢轨扣件减振橡胶动态恢复力模型,着重揭示一阶、三阶和五阶动刚度对激励频率和振幅的依赖性。运用最小二乘拟合法确定各阶动刚度中所含未知参数,并利用理论模型重构恢复力-位移回线,最终将其与试验曲线相比较。研究结果表明:钢轨扣件减振橡胶具有明显的非线性特性,其动态刚度与振幅和频率之间呈复杂的曲面关系;本文所建动态力学模型可为钢轨扣件减振橡胶的动态分析和优化设计提供了一定的理论支持。
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| 关 键 词： | 钢轨扣件 减振橡胶 动态特性 动刚度 参数识别 |
Dynamic characteristic analysis of rubber absorber in rail fastening |
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| LIU Yan,LUO Yan-yun.Dynamic characteristic analysis of rubber absorber in rail fastening[J].Journal of Central South University:Science and Technology,2011(9). |
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| Authors: | LIU Yan LUO Yan-yun |
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| Institution: | LIU Yan,LUO Yan-yun (Institute of Railway and Urban Railway Transit,Tongji University,Shanghai 201804,China) |
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| Abstract: | A non-linear dynamic mechanical model of rubber absorber in railway fastening was proposed,which was based on a superposition of non-linear elastic restoring force and non-linear damping force.This calculation model emphasized the first-order,the third-order and the fifth-order dynamic stiffness coefficients dependence on amplitude and frequency.A procedure to determine the unknown parameters of mathematical model was also described.The calculated results finally show good agreement with the measurement res... |
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| Keywords: | rail fastening rubber absorber dynamic characteristic dynamic stiffness parameter identification |
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