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基于流动模式的汽车双筒式磁流变减振器设计与试验研究 总被引:1,自引:0,他引:1
提出一种基于流动模式的汽车单出杆、双筒式磁流变减振器的结构与工作原理,该减振器采用已有汽车悬架双筒式普通液压减振器的设计标准制造,对现有双筒式减振器具有很强工艺继承性。根据Bingham流体模型建立双筒式磁流变减振器阻尼力数学模型,并提出该减振器的磁路设计方法;针对磁路的非轴对称特性,建立磁路三维有限元仿真模型,结合北京现代某款汽车前悬架减振器的技术要求和磁流变液流变特性,进行三维静态磁场分析,确定活塞磁路的主要参数。制作汽车双筒式磁流变减振器,并对此进行台架特性试验;通过试验与理论计算对比,结果表明理论计算数据与试验数据较吻合,所提出的双筒式磁流变减振器设计方法是可行的,对汽车双筒式磁流变减振器的设计使用具有指导意义。 相似文献
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为了高效研究汽车减振器阀系参数变化对其阻尼特性的影响.以汽车广泛使用的非线性液压减振器为研究对象,结合减振器阻尼元件受力分析,运用MATLAB软件建立减振器特性仿真模型,通过仿真数据与台架试验数据拟合度分析验证了所建模型的可靠性;进而利用仿真模型对减振器阀系展开敏感性因素分析,得到了对阻尼特性影响显著的阀系参数;研究了... 相似文献
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针对橡胶减振器在舰船设备应用中常伴随着不可预见的疲劳失效问题,对舰用BE-300型橡胶减振器疲劳寿命预测方法进行了研究。基于连续介质力学理论,通过开展橡胶材料拉伸疲劳试验,建立了减振器橡胶材料的疲劳寿命预测模型;根据减振器橡胶材料的单轴拉伸和单轴压缩试验数据拟合结果,选择2阶多项式本构模型进行了橡胶减振器的有限元仿真;根据有限元仿真计算结果提取了橡胶减振器的最大主应力分量,结合橡胶材料疲劳寿命模型预测了橡胶减振器的疲劳寿命。研究结果表明:选取不同的疲劳损伤参量所得到的寿命预测结果并不相同,以等效应变为损伤参量对橡胶减振器寿命进行预测得到的结果与实际情况较为符合,该方法可用来预测舰用橡胶减振器的疲劳寿命。 相似文献
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《机械制造与自动化》2019,(5):93-96
以环形橡胶-硅油组合式减振器为研究对象,通过ANSYS开展了其静态刚度特性研究。通过橡胶样件的单轴拉伸试验,基于试验数据拟合确定了多种橡胶超弹性本构模型参数。分别建立了减振器固体有限元模型和流体有限元模型,进行静态刚度仿真。通过试验机开展了该减振器静态刚度试验。对比分析静态仿真与静态试验,选取了Neo-Hookean超弹性本构模型,分析了橡胶外径、橡胶内径和硅油粘度对静态刚度的影响。研究结果为该减振器的应用提供了支持。 相似文献
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为了提高车辆动力学计算机仿真精度,研究抗蛇行减振器力学模型及其对车辆动力学性能的影响,基于可压缩流体的压力?流量特性建立了我国某高速动车组抗蛇行减振器非线性力学模型,并对其进行了试验和动力学仿真分析。结果表明:相比传统分段线性模型,抗蛇行减振器非线性力学模型能够同时体现黏性阻尼力和油液被压缩而产生的回复力,仿真计算结果与试验结果吻合良好;基于抗蛇行减振器非线性力学模型计算的临界速度会随踏面等效锥度的增加而先增大后减小,计算的横向平稳性指标较高,且随速度增加而增加的趋势更显著。研究表明,抗蛇行减振器非线性力学模型能够有效提高动力学仿真精度,对车辆的蛇行运动稳定性和横向平稳性有较大影响,但对垂向平稳性和曲线通过安全性的影响较小。 相似文献
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针对油液泄漏导致的减振器失效问题,以某国产液压减振器为研究对象,通过分析其结构以及工作原理,建立减振器阻尼力的数学表达式以及AMESim一维仿真模型,仿真得到其不同速度下的示功图以及阻尼特性曲线,并与试验结果进行对比,仿真结果与试验结果能够较好的吻合,表明用AMESim所建立的一维仿真模型真实可靠。基于该仿真模型仿真活塞缝隙、底阀、活塞杆与密封圈缝隙的油液泄漏而导致的减振器失效问题,对比不同状态下的阻尼特性曲线,发现仿真模型可以较好的进行减振器失效的仿真分析,表明仿真模型能够指导实际工程设计以及相关的性能预测。 相似文献
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为减少金属橡胶减振器的故障率,降低因金属橡胶减振器损坏而产生的经济损失。通过对金属橡胶减振器的故障原因进行分析,并建立仿真模型进行仿真分析并对金属橡胶减振器进行理论分析,提出金属橡胶减振器的优化方法。建立金属橡胶减振器数学模型,利用遗传算法对金属橡胶减振器进行整体的优化,并结合有限元分析对优化结果进行确定,最终进行实验验证。结果表明:优化后的金属橡胶减振器的刚度有明显的提高,金属橡胶减振器的抗压能力也得到了一定的提高,仿真结果与实验结果存在一定的误差,但优化后的金属橡胶减振器满足运载车辆工作要求,优化达到了预期的目标。 相似文献
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《Mechanical Systems and Signal Processing》2006,20(2):373-388
In this study, a new mathematical dynamic model of shock absorber is proposed to predict the dynamic characteristics of an automotive system. The performance of shock absorber is directly related to the car behaviours and performance, both for handling and ride comfort. Damping characteristics of automotive can be analysed by considering the performance of displacement-sensitive shock absorber (DSSA) for the ride comfort. The proposed model of the DSSA is considered as two modes of damping force (i.e. soft and hard) according to the position of piston. For the simulation validation of vehicle-dynamic characteristics, the DSSA is mathematically modelled by considering the fluid flow in chamber and valve in accordance with the hard, transient and soft zone. And the vehicle dynamic characteristic of the DSSA is analysed using quarter car model. To show the effectiveness of the proposed damper, the analysed results of damping characteristics were compared with the experimental results, which showed similar behaviour with the corresponding experimental one. The simulation results of frequency response are compared with the ones of passive shock absorber. From the simulation results of the DSSA, it can be concluded that the ride comfort of the DSSA increased at the low-amplitude road condition and the driving safety was increased partially at the high-amplitude road condition. The results reported herein will provide a better understanding of the shock absorber. Moreover, it is believed that those properties of the results can be utilised in the dynamic design of the automotive system. 相似文献
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CAD/CAE OF THE WORKING CHARACTERISTICS OF A NEW TYPE OF FLUID COUPLING SHOCK ABSORBER 总被引:4,自引:0,他引:4
Yang Ping Zhong Yifang Zhou JiSchool of Mechanical Science Engineering Huazhong University of Science Technology Wuhan ChinaLiu Yong Guilin Institute of Electronic Technology 《机械工程学报(英文版)》2002,15(3):222-227
For purpose of simulation of the working characteristics of a new type of fluid coupling shock absorber for vibration protection of sensitive equipment, a physical model is presented by analyzing the internal fluid dynamic phenomenon with respect to the coupling shock absorber and implemented in MATLAB software package. Using the model it is possible to evaluate the importance of different factors for design of the shock absorber. In the meantime, the key-model machine is designed for coupling dynamic test. Comparisons with experimental results confirm the validity of the model. So the CAD/CAE software has been developed in MATLAB for design and experimental test of the new coupling shock absorber. 相似文献
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In this study, a new mathematical dynamic model of displacement sensitive shock absorber (DSSA) is proposed to predict the
dynamic characteristics of automotive shock absorber The performance of shock absorber is directly related to the vehicle
behaviors and performance, both for handling and ride comfort The proposed model of the DSSA has two modes of damping foice
(i e soft and hard) according to the position of piston In this paper, the performance of the DSSA is analyzed by considering
the transient zone for more exact dynamic characteristics For the mathematical modeling of DSSA, flow continuity equations
at the compression and rebound chamber are formulated And the flow equations at the compression and rebound stroke are formulated,
respectively. Also, the flow analysis at the reservoir chamber is carried out Accordingly, the damping force of the shock
absorber is determined by the forces acting on the both side of piston The analytic result of damping force characteristics
are compared with the experimental results to prove the effectiveness Especially, the effects of displacement sensitive orifice
area and the effects of displacement sensitive orifice length on the damping force are observed, respectively The results
reported herein will provide a better understanding of the shock absorber 相似文献
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液压减振器是通过消耗机械能实现减振目的的装置,但目前其散热效果并不理想,温度升高导致了减振器整体性能下降。利用路面不平度激励模型、悬架系统振动模型、热量传递模型,通过能量守恒定律建立了液压减振器的热力学平衡数学模型。综合考虑油液泄漏特性、密封特性以及液压减振器阻尼性能界定其许用油温。对液压减振器散热参数进行了分析研究,且试验结果表明分析模型与设计方法正确,为减振器的设计提供参考。 相似文献
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为建立减振器参数化数学模型,基于圆薄板大挠曲理论和弹性力学原理,推导出了阀片大挠曲变形与半径的关系式。建立外半径不全相等时环形叠加阀片的力学模型,提出用大挠曲变形解析方法与有限元分析相结合的等效模型求解方式推导出该环形叠加阀片挠曲变形的解析式。根据活塞阀系叠加阀片与复原弹簧同时变形的串联原理,建立了该双筒式减振器在复原与压缩行程中阻尼特性的数学模型。采用NSGA-Ⅱ算法对模型中难以测量的参数进行辨识,辨识后的减振器外特性仿真结果与试验数据基本吻合,说明所建立的参数化模型比较可靠,对减振器的性能调试具有指导意义。 相似文献