共查询到19条相似文献,搜索用时 109 毫秒
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机车运动是三维空间的运动,当机车运行时,除前进方向的运动外,在上下和左右方向也产生运动,即所谓的点头运动和摇头运动。由于车体质量很大,故惯性力较大。车辆行走部分安装弹簧减振装置的目的就是用来缓和与减小振动和冲击,以提高车辆运行的平稳性,保证乘客的舒适性和所运货物的完整无损,为了减振,弹簧形状及刚度的设计尤为重要,为此,设计了两种能增强刚度的减振弹簧:组合弹簧和圆锥弹簧。这里我们介绍组合弹簧的设计。组合弹簧的设计螺旋弹簧与椭圆弹簧及叠板弹簧等相比,具有结构简单、制造和维修容易、成本较低、自重较轻等… 相似文献
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本文对机械零件可靠性算法作了简要介绍,并通过弹簧的实例,分别采用中心点法,验算点法以及蒙特卡洛法对弹簧的静强度和疲劳强度进行可靠性计算,比较了各算法的误差大小,说明了各算法在弹簧强度可靠性计算中的实用性。 相似文献
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A. González Rodríguez J.M. Chacón A. Donoso A.G. González Rodríguez 《Mechanism and Machine Theory》2011,46(12):1970-1979
An adjustable-stiffness actuator composed of two antagonistic non-linear springs is proposed in this paper. The elastic device consists of two pairs of leaf springs working in bending conditions under large displacements. Owing to this geometric non-linearity, the global stiffness of the actuator can be adjusted by modifying the shape of the leaf springs. A mathematical model has been developed in order to predict the mechanical behavior of our proposal. The non-linear differential equation derived from the model is solved, obtaining large stiffness variations. A prototype of the actuator was fabricated and tested for different load cases. Experimental results were compared with numerical simulations for model verification, showing excellent agreement for a wide range of work. 相似文献
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粒子群算法容易理解、易于实现、编程简单。利用粒子群优化算法对汽车悬架弹簧进行优化设计,其速度要比用其他的方法快得多,仅迭代很少的次数就能得出比较优的结果。有利于提高设计的速度,使设计易于实现,更大程度地提高设计的质量,为钢板弹簧系统、汽车悬架和整车的分析计算奠定坚实的基础。同时为少片弹簧和多片弹簧的优化设计提供了一种新的方法。 相似文献
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The integrity and reliability of the beam-like structures are dependent in part on their boundary conditions, which can vary with time due to damage or aging, thus the identification of boundary conditions might be one of the most significant aspects for damage detection of such structures. This paper investigates a direct method for identifying the boundary conditions of tapered beam-like structures using static flexibility measurements. The beam is modeled by a flexible tapered beam, which is constrained at one end by translational and rotational springs. The translational and rotational springs are utilized to simulate the boundary conditions of the tapered beam, and the purpose of this paper is to identify the stiffnesses of the translational and rotational springs, i.e. translational root stiffness and rotational root stiffness. It is theoretical proved that the static flexibility measured on the beam can be expressed as a function of the flexural rigidity of the beam at its constrained end, translational root stiffness and rotational root stiffness. Then, a set of linear equations for identifying the translational and rotational root stiffnesses are formed by three or more different static flexibility measurements. Finally, the proposed method is validated using both simulative and experimental examples. 相似文献
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用李群李代数的理论方法探讨了具有空间变形构件的机械系统的分析问题。根据弹性力学的基本原理,建立了考虑弯曲、拉伸和扭转的空间变形杆件的弹性方程。将杆件作为基本元素,将其理论扩展应用于具有空间柔性变形杆件的串联机器人系统,分析了系统空间弹性性能与运动学问题。进而,研究了其在柔性并联机构振动平台分析中的应用。最后,应用该理论很好地解决了螺旋弹簧的空间弹性性能分析问题。将李群李代数理论成功地拓展应用于空间柔性机构系统的分析,验证了该方法的有效性。 相似文献
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通过对潜油电泵叶导轮的失效原因进行研究,应用叶导轮测试实验台系统对失效叶导轮进行测试,得出统计数据,应用可靠性分析方法,对叶导轮失效规律进行研究,得出叶导轮性能曲线,并对控制措施进行了有意义的探讨。 相似文献