摘要
针对磁流变减振器会随工作温度变化阻尼力发生改变，进而降低磁流变悬架系统性能的问题，基于传热学方程和参数慢变非线性振动理论研究温度变化对磁流变非线性悬架系统的主共振动力学行为的影响。根据传热学理论建立磁流变阻尼器工作区域能量微分方程，用数值方法求出温度变化规律,用改进的Bingham模型计算磁流变阻尼力；建立慢变参数磁流变非线性悬架系统动力学方程，利用平均法求解主共振激励下的动行程稳态幅值响应。研究表明，随着磁流变阻尼器运行时间增加，温度逐渐升高，阻尼器输出阻尼力大幅降低，悬架动行程稳态振幅变化量也越大，导致悬架系统性能偏离设计目标。
Abstract
The output damping force of the magneto-rheological (MR) damper will be reduced with the increment of working temperature. As a result, the performance of the MR suspension system will be degraded. On the basis of the theory of heat transfer and nonlinear vibration, the main resonance of the MR suspension dynamic system with slowly varying parameters will be analyzed in this study. The energy differential equations at the working area of an MR damper were established and solved by the numerical method. The modified Bingham model was applied to calculate the output damping force of the MR damper. The nonlinear dynamic equation of the MR suspension system with a slowly varying parameter was formulated. The steady amplitude response of the MR suspension system under the excitation of main resonance was deduced by the averaging method. The calculated results show that the working temperature will be increased with the increment of running time of the MR damper. Consequently, the output damping force of the MR damper will be significantly reduced and the vibration amplitude variation of the suspension system will also be increased. Therefore, the performance of the MR suspension will be degraded.
关键词
慢变参数 /
磁流变阻尼器 /
温度 /
非线性振动
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Key words
slowly varying parameter /
MR damper /
temperature /
nonlinear vibration
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董小闵 王小龙 古晓科.
参数慢变非线性磁流变悬架系统主共振研究[J]. 振动与冲击, 2014, 33(23): 122-126
DONG XiaoMin WANG XiaoLong.
Main resonance analysis for magneto-rheological suspension system with slowly varying parameter[J]. Journal of Vibration and Shock, 2014, 33(23): 122-126
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