共查询到19条相似文献,搜索用时 281 毫秒
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钢板弹簧的非线性迟滞特性对重型商用车的行驶平顺性、制动性及车辆对路面响应有着重要影响。利用APDL语言,在ANSYS中考虑了钢板弹簧的接触非线性、大变形、板间摩擦及装配预紧力,建立了某重型商用车钢板弹簧的1/4有限元力学模型。对其进行了静力学及瞬态动力学分析,得出了其加载与卸载的载荷-位移曲线,讨论了在正弦激励下板间摩擦因数、激励振幅及频率对钢板弹簧迟滞特性的影响,经分析得出:钢板弹簧的阻尼力随着摩擦因数的增大而增大,随着激励频率的增大而减小,随着幅值的增大而增大。该方法为今后钢板弹簧的设计制造及仿真分析提供相关参考。 相似文献
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本文提出的钢板弹簧迟滞摩擦功耗理论计算方法,解决了长期以来板簧动态特性中摩擦阻尼的确定这一关键问题。通过与实验比较,证明该法计算准确。文章还从理论上证明板簧在动态过程中,阻尼与载荷呈非线性的平方关系。 相似文献
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本文根据统计线性化原理,对载货汽车钢板弹簧迟滞随机恢复力进行分解,提出了适合于工程应用的钢板弹簧动态统计刚度与阻尼系数的计算方法。该方法的合理性经试验得以验证。本文提出的统计线性化模型可用于汽车悬挂参数的优化以及分析和预测汽车的平顺性。 相似文献
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通过有限元建模,利用ANSYS软件对钢板弹簧进行非线性接触CAE分析;通过分析,提出了结构改进方案,消除了钢板弹簧的非线性振劝,并提高了其使用寿命。 相似文献
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气门机构动力学模型中液压间隙调节器(HLA)的模拟 总被引:5,自引:1,他引:5
在气门机构动力学计算中,模拟液压间隙调节器(HLA)应考虑到高压腔机油的可压缩性、泄漏及补偿;同时也应考虑泄漏机油对柱塞和柱塞套的剪切阻尼力的影响。介绍了国外研究的液压模型和质量-阻尼-弹簧模型,从物理意义上对质量-阻尼-弹簧模型以及其中刚度、阻尼参数的聚值进行了分析和探讨。 相似文献
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为改善SH6600轻型客车的平顺性,提出了改进设计方案,本文介绍SH6600轻型客车悬架参数的计算和悬架振动的分析过程,给出了在各种不同道路上SH6600轻型客车1/3信频程试验分析曲线,并提出了改善SH6600轻型客车平顺性的三个方面,即重新设计后悬架钢板弹簧,提高前悬架减振器阻尼以及设计与后悬架钢板弹簧相匹配的后悬架减振器阻尼。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(2):149-163
Summary We investigate the dynamics of a simple model of a wheelset that supports one end of a railway freight wagon by springs with linear characteristics and dry friction dampers. The wagon runs on an ideal, straight and level track with constant speed. The lateral dynamics in dependence on the speed is examined. We have included stick-slip and hysteresis in our model of the dry friction and assume that Coulomb's law holds during the slip phase. It is found that the action of dry friction completely changes the bifurcation diagram, and that the longitudinal component of the dry friction damping forces destabilizes the wagon. 相似文献
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Hans True Rolf Asmund 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2003,38(2):149-163
Summary We investigate the dynamics of a simple model of a wheelset that supports one end of a railway freight wagon by springs with linear characteristics and dry friction dampers. The wagon runs on an ideal, straight and level track with constant speed. The lateral dynamics in dependence on the speed is examined. We have included stick-slip and hysteresis in our model of the dry friction and assume that Coulomb's law holds during the slip phase. It is found that the action of dry friction completely changes the bifurcation diagram, and that the longitudinal component of the dry friction damping forces destabilizes the wagon. 相似文献
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抑制制动器振动噪声的阻尼方法的探讨 总被引:1,自引:4,他引:1
针对在盘式制动器制动块底板上粘贴一层阻尼层(Insulating Shim)的阻尼处理方法,首先指出制动块底板上阻尼层的减振机制在于粘弹性材料在接触面间表现出的摩擦作用,尤其取决于材料本身的迟滞效应。然后.定量分析了阻尼层对制动器噪声的抑制效果;利用能量等效原理将接触摩擦转换成系统中粘性阻尼后进行特征分析.考察系统稳定性。 相似文献
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盘式制动器的制动振动噪声是一个复杂的非线性动力学问题。文章利用有限元软件建立了基于面接触的有限元模型,克服简单利用弹簧来模拟接触的不足,通过复特征值分析预测制动噪声。通过改变摩擦因数、制动力、阻尼及温度等参数,建立了符合实际工况的制动器有限元模型,并分析这些参数对系统稳定性的影响。结果表明降低温度、减小摩擦因数、减小制动力和增大阻尼可以减小制动器的制动噪声。 相似文献
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板簧模型对车架强度计算的影响分析 总被引:5,自引:2,他引:5
轻型载货汽车钢板弹簧对车架的支持往往简化为对车架的弹性约束,由于悬架系统的工作特点,当车架受力变形时,可以带动车轮在地面上有微小的滚动,从而实现整个钢板弹簧的协调变形,为车架提供支持力,利用前后置处理软件MSC/PATRAN(V8.5)和有限元求解器MSC/PATRAN ADVANCED-FEA(V8.5)能够对轻型载货汽车钢板弹簧的模拟方式进行若干情况的分析和比较,得出能较好模拟真实结构的建模方式。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(1):441-466
SUMMARY On the basis of the brush-type tyre model the paper considers the interaction between steady-state rolling deformable wheel and flat road surface as well as corresponding force and moment characteristics of the wheel. At least two zones of sliding, anisotropic dry friction, sliding friction coefficient speed-dependent and instantaneous leap of the friction coefficient when transition from sliding to adhesion zone occurs, have been taken into account, as well as distributed peripheral mass of tyre, elasticity, pseudo-dry friction and damping properties in radial, tangential and lateral directions of the elements at the wheel periphery, including a visco-elastic belt. Vertical force distribution in the contact area is not supposed to be known in advance and follows from the calculation. As a result, sliding zone lengths, distributed forces in contact area, six components of generalized road reaction reduced to the wheel center, and rolling resistance moment are found as functions of vertical load, movement velocity, longitudinal and side slip, friction in contact area with road, stiffnesses, dry friction and damping in the tyre model elements and of distributed peripheral mass. A computer program developed in Fortran and results of calculations are of particular interest for qualitative analysis including steady rolling of studded tyre and also racing car and aircraft tyres which peripheral mass shows itself in a special way because of great movement velocities. 相似文献