共查询到17条相似文献,搜索用时 156 毫秒
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考虑了轮胎的几何非线性、橡胶材料的非线性、橡胶物理体积的不可压缩性,建立了轮胎的三维有限元模型,分析了实心轮胎在滚动状态下的接触问题,考察了实心轮胎的变形、应力、应变、下沉量与载荷的关系. 相似文献
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考虑了轮胎的几何非线性、橡胶材料的非线性、橡胶物理体积的不可压缩性,建立了轮胎的三譬有限元模型,分析了实心轮胎在滚动状态下的接触问题,考察了实心轮胎的变形、应力、应变、下沉量与载荷的关系。 相似文献
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子午线轮胎静态侧倾性能有限元分析及试验研究 总被引:2,自引:1,他引:2
采用三维非线性有限元分析方法,在模型中考虑了轮胎的几何非线性、材料非线性以及轮胎接触非线性,计算了子午线轮胎195/60R14在不同角度侧倾接地时的变形情况,与试验结果进行了比较。分析了轮胎在静态不同角度侧倾接地状况下载荷-下沉量变化、接地区压力分布、接地区摩擦力分布、侧倾侧向力-侧倾角变化关系;采用连续加载-卸载方式,开展了轮胎侧倾接地试验,实时记录了轮胎受力与变形关系,采用压力敏感膜测量了轮胎侧倾接地时的接地区压力分布状况。结果表明,轮胎侧倾接地状况下的变形及接地区压力分布趋势的计算结果与试验测试结果一致。 相似文献
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工程车辆轮胎与土壤相互接触作用,对工程车辆性能具有重要影响。应用三重非线性有限元分析方法,利用非线性有限元软件ABAQUS建立轮胎与地面接触三维有限元模型,分析了稳态滚动轮胎在不同胎压、载荷下与土壤接触问题,对比了不同载荷、胎压下轮胎及地面的变形、应力和应变情况。数值计算结果表明,该轮胎/土壤接触有限元模型是合理的。 相似文献
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工程车辆轮胎与土壤相互接触作用,对工程车辆性能具有重要影响.应用三重非线性有限元分析方法,利用非线性有限元软件ABAQUS建立轮胎与地面接触三维有限元模型,分析了稳态滚动轮胎在不同胎压、载荷下与土壤接触问题,对比了不同载荷、胎压下轮胎及地面的变形、应力和应变情况.数值计算结果表明,该轮胎/土壤接触有限元模型是合理的. 相似文献
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针对新型机械弹性车轮刚度特性,利用曲梁理论建立了弹性基础封闭圆环曲梁模型,对车轮刚度与輮轮抗弯刚度、铰链组弹性基础刚度及激振频率之间的关系进行了分析。结合车轮静态和动态试验分析结果,验证了根据曲梁理论所建模型的正确性,并分析了车轮刚度与车轮变形量、变形速率及激振频率之间的解析关系。根据分析结果建立了车轮刚度和阻尼的非线性解析模型,该模型反映了车轮变形量和激振频率对车轮刚度的影响,以及车轮变形速率和激振频率对车轮阻尼的影响,从而为车轮结构振动的进一步研究提供指导。 相似文献
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在模型简化及边界条件进行一定假设的基础上,建立了陶瓷球轴承的三维几何模型。采用有限单元法,借助有限元分析软件对模型进行了多种实际工况的非线性静力学分析,得到了轴承的应力和变形。利用传统赫兹接触理论进行轴承强度计算,并与已有的计算结果对比,证明了轴承的建模和简化的合理性,说明计算方法是可靠的。 相似文献
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基于螺钉连接接触问题有限元分析的探讨 总被引:3,自引:0,他引:3
螺钉连接是典型的机械连接方式,连接面的接触问题是机械连接最常面临的问题。由于接触面的应力状态很难测定,属于接触非线性问题。本文利用有限元软件建立了两块螺钉连接的板结构有限元模型。基于所建立的有限元模型,本文运用Partran2003进行线性分析和ABAQUS6.4进行非线性分析,计算两块螺钉连接板的受重力变形情况。计算结果表明,用非线性方法分析得到的结果更合理.准确。提出对典型连接的接触问题,用非线性有限元分析的方法。 相似文献
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A general nonlinear dynamics model is developed for three-dimensional flexible manipulators. A manipulator link is modelled as a beam undergoing both large gross rigid body motion and elastic deformation. The beam is discretized by the finite element method with its inertia lumped at the nodes of each element. A nonlinear strain-displacement relationship is developed to retain the geometric nonlinearity resulting from the large relative elastic deflections. The geometric nonlinearity is specifically treated so that the significance of the geometric nonlinear effects can be easily included not only in the fully nonlinear model, but also in the linearized model. Numerical results are presented to demonstrate the significant effects of geometric nonlinearity on the dynamic response of a flexible manipulator. 相似文献
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球铰刚度计算模型及靠冗余支链实现并联机床刚度的改善 总被引:9,自引:0,他引:9
以Stewart机构为例提出一种基于解析法和有限元法的刚度分析新方法。应用有限元软件模拟球铰内的非线性接触变形,将计算结果抽象成一个特征参数带入机构的刚度解析模型中,然后得到机构的刚度矩阵,以解决在解析模型中无法处理铰链刚性的问题,并采用有限元软件证实该方法的可靠性。如果在解析模型中忽略球铰变形,则整个机构的刚度解析结果将产生较大误差。在此基础上,应用该方法定量研究采用主动冗余支链对提高并联机床刚性的效果。结果表明,在一定工作空间范围内,主动冗余支链可以显著提高并联机床的刚性。 相似文献
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Chang-Min Suh Kyo-Seouk Bae Min-Soo Suh 《Journal of Mechanical Science and Technology》2008,22(11):2009-2015
The grinding characteristics and the wear behavior of diamond wheel for grinding the optical connector ferrule were investigated
by finite element analysis (FEA) and wear test. FEA of contact between diamond wheel and ferrule shows that the subsurface
damage area of ferrule is 13μm from the interface of abrasive particle and matrix. Fallout of abrasive particle is affected
by the stress state at the interface. A 2-D finite element model was established to calculate the distribution of stress at
the interface. As the result of FEA, fallout condition of abrasive was concerned with the ratio of the critical protrusion;
the ratio of particle size is about 0.6. FE model was established to investigate the effects of the diamond concentration
of wheel. The FEA result shows that the lower concentration of it has larger wear volume due to the small stress propagation.
To investigate grinding performance, the pin-on-disc wear test was carried out for three types of concentrations 75%, 100%
and 125%. Through the wear test, it was confirmed that the 75% wheel concentration has the highest amount of wear volume.
This result shows good agreement with that of FEA. And 100% concentration by considering the grinding ratio of the wheel shows
the best optimized result for the grinding performance.
This paper was recommended for publication in revised form by Associate Editor Maenghyo Cho
Chang-Min Suh received his B.S. and M.S. degrees in mechanical engineering from Busan Na-tional University in 1964 and 1968, respectively,
and received his Ph.D. degree from the University of Tokyo in 1981. He now is a professor at Kyungpook National University.
He has served as the Head of the Department of Mechanical Engineering at Kyungpook National University, a Visiting Professor
of Materials Science and Engineering in Univ. of California Berkeley, a Head of the Institute of Engineering Design Technology
Kyungpook Nat’l Univ, and a Head of the Technology Innovation Center designated by the Department of Commerce and Industry
of Korea. 相似文献