共查询到19条相似文献,搜索用时 140 毫秒
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车用电流变隔振器的动特性试验研究 总被引:1,自引:0,他引:1
简述了隔振技术的发展和各类典型隔振器的原理及应用,提出发动机隔振系统的研制和开发主要集中于改善其幅一频特性方面。着重阐述了电流变隔振器的工作原理,通过具体的试验测得评价隔振性能的两个参数——动刚度和响应滞后角。得出结论:电流变隔振器具有明显的优势,它利用“智能”的电流变液体,依靠外电场的控制及时、准确地调控液体的粘度。从而实现对系统阻尼系数的干预调节,适用于发动机的宽频带振动的隔离。 相似文献
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汽车用电流变液器件现状与展望 总被引:3,自引:0,他引:3
本文在简单概述电流变液及其基本特性的同时,详细阐述了电流变液技术在汽车传动、制动和减振降噪方面的应用,并在此基础上对未来的电流变液汽车进行了大胆的预测。 相似文献
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张智卢剑伟陈渊锋吴唯唯王馨梓 《汽车工程学报》2013,(2):94-99
利用有限元方法,分析了某型钢板弹簧的刚度特性,讨论了摩擦系数对钢板弹簧刚度特性及动特性的影响。采用有限元方法分析了不同摩擦系数下钢板弹簧的动特性,并根据这些结果对钢板弹簧的非线性恢复力进行了拟合,并以此为基础分析了悬架在简谐激励下的动态响应特性,重点讨论了摩擦系数对其的影响。分析结果表明,摩擦系数对悬架动特性影响显著,当摩擦系数增加到一定程度时系统出现了混沌运动。 相似文献
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通过对中型货车用调速风扇离合器的改进设计,对电流变流体在调速离合器中的应用进行了试验研究。在三种输入转速下,当外加电场强度不同时,对风扇离合器的调速特性进行了分析。通过对不同的试验过程所得到的结果及与电流变流体在电流变仪中的测量结果的对比,证明了剪切率的作用对风扇离合器的调速性能有重要影响。 相似文献
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Mattias M. Sj berg Leif Kari 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2002,37(3):217-236
A non-linear rubber isolator included in a dynamic system is examined where influences of dynamic amplitude and frequency are investigated through measurements and modeling. The frequency dependence of the isolator is modeled by a fractional calculus element while a frictional component accounts for its amplitude dependence. The model works in the time-domain and simulations of harmonic and non-harmonic motion are compared to measurements. Good agreement is obtained in a wide frequency and amplitude range for a freely oscillating one degree of freedom system, with the isolator acting as a coupling between exciting foundation and mass, and for a single isolator showing the typical amplitude dependence known as the Payne effect. The model is found to be superior to the commonly applied Kelvin-Voigt element in modeling the dynamic isolator properties. 相似文献
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振动压路机橡胶减振器的隔振性能分析 总被引:1,自引:0,他引:1
分析了振动压路机减振器的材料丁腈橡胶的动态性能和振动压路机的减振系统模型,研究表明:在常温下,橡胶减振器动态性能很差,他是导致压路机减振性能不理想的主要原因之一。在动态分析基础上设计减振器,同时改善减振器的动态性能是提高压路机的隔振性能的必要条件。 相似文献
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G. Nakhaie Jazar A. Narimani M. F. Golnaraghi D. A. Swanson 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2003,39(6):437-466
Summary In this paper we examine a linear one-degree of freedom vibration isolator mount. The linearity of the system allows us to analyze its frequency and time response characteristics analytically. Optimal damping and stiffness values for the isolator are obtained by minimizing certain cost functions, which are the Root Mean Square (RMS) of the absolute acceleration and the relative displacement. These RMS cost functions are used to create a design chart for the isolator parameters. This is very useful particularly in the presence of physical constraints such as a limit in relative displacement. The time response of the system for a unit step input is also considered to gain an insight into the transient characteristics of the system. We obtain an optimal value for the damping ratio of the system in order to minimize the transmitted acceleration. Combining the frequency and time response analyses leads to an optimal value for the mount natural frequency and damping ratio satisfying both time and frequency domains. The results are verified numerically using measured acceleration as input. 相似文献
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介绍了非线性减振器的工作机理和对非线性减振器的研究及发展现状 ,分析了几种数学模型和参数辨识的方法。 相似文献
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Y. S. Kim E. Y. Kim Y. W. Shin S. K. Lee 《International Journal of Automotive Technology》2010,11(5):759-765
This paper presents a multi-body flexible dynamic analysis of a centrifugal turbo blower for a fuel cell electric vehicle
(FCEV) based on the application of computer-aided engineering (CAE) to predict the acceleration at the mount position of the
blower. This predicted acceleration is validated by using the measured acceleration data. The numerical simulation for the
multi-body flexible dynamics of the blower is used not only to identify the most effective mount among four mounts in an FCEV
by controlling the complex stiffness of the isolator, but also to suggest the range of complex stiffness of the isolator at
the most effective mount. This numerical simulation technology can be useful for the estimation of the variation of vibration
transmission for the structural modification of the turbo blower. 相似文献
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采用电流变技术的发动机风扇离合器 总被引:2,自引:0,他引:2
探讨了电流变技术在汽车发动机风扇离合器中的应用。描述了电流变风扇离合器的结构及其对电流变流体性能的要求,研制开发了一种新型结构的汽车发动机风扇离合器,并给出了试验结果。 相似文献
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汽车动力总成液力悬置——一种新型隔振元件的结构发展 总被引:5,自引:0,他引:5
动力总成液力悬置是国外70年代末在汽车上开始应用的新型隔振元件,是国际汽车隔振技术的重大突破,由于它具有优良的动特性,可明显降低汽车振动和车内噪声,因而它取代传统的橡胶悬置是未来发展的必然,本文回顾了液力悬置的发展历史,对其进行了分类,阐述了各种典型的液力悬置的结构工作原理和性能特点及其发展趋势。 相似文献