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考慮電動輪轉(zhuǎn)矩波動的汽車懸架液壓襯套設(shè)計
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國家自然科學基金項目(51375343、51305303)


Design of Hydraulic Bushings for Electric Wheel Suspension System Considering Torque Ripple
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    摘要:

    懸架襯套作為汽車振動的重要傳遞部件對于衰減汽車振動有著重要作用,在輪轂電機驅(qū)動電動汽車中,電機的轉(zhuǎn)矩波動會引起車身的寬頻縱向振動,傳統(tǒng)的橡膠襯套因在寬頻范圍內(nèi)阻尼特性變化不大,無法在特定的頻帶上產(chǎn)生大阻尼來迅速衰減振動。引入液壓襯套可以衰減電動輪懸架中特定頻帶的轉(zhuǎn)矩波動激勵,首先建立了能夠準確描述液壓襯套力學性能的有限元模型,然后對液壓襯套進行了力學性能敏感因素分析,最后根據(jù)敏感因素分析結(jié)果和振動傳遞特性對液壓襯套進行結(jié)構(gòu)參數(shù)設(shè)計,結(jié)果表明通過合理設(shè)計液壓襯套的橡膠剪切模量、慣性通道橫截面積和通道數(shù)量等參數(shù),可以顯著減小驅(qū)動電機轉(zhuǎn)矩波動對車身縱向振動的影響,使車身縱向力振動在0~120Hz范圍內(nèi)衰減13.4%。

    Abstract:

    As the important transmission part of the vehicle vibration, the suspension bushing has a significant effect on weakening the vehicle vibration. In the wheel drive electric vehicle, the broadband frequency longitudinal vibration of the vehicle body will be caused by the torque ripple of the hub motor. The traditional rubber bushing has small changes of damping characteristics in broadband frequency ranges and it will not generate high damping to weaken the vibration rapidly on specific frequency band as well. So the hydraulic bushings were used to attenuate the excitation of torque ripple in particular frequency band. Firstly, the accurate finite element model was established and applied to analyze the sensitive factors of mechanical properties of the hydraulic bushing. Then, the design of the hydraulic bushing was performed according to the results of the analyzed sensitive factors. The results illustrated that the hydraulic bushing could substantially decrease the influence on the vehicle body longitudinal vibration by 13.4% whining the range of 0~120Hz through the reasonable parameters design of rubber shear modulus of the hydraulic bushing, the cross section area of the channel and the numbers of channels, which also supplies the reference of the suspension structure design of the distributed driving electric vehicle.

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左曙光,孫曉華,吳旭東,李 凱,馮朝陽,倪天心.考慮電動輪轉(zhuǎn)矩波動的汽車懸架液壓襯套設(shè)計[J].農(nóng)業(yè)機械學報,2016,47(7):354-360. Zuo Shuguang, Sun Xiaohua, Wu Xudong, Li Kai, Feng Zhaoyang, Ni Tianxin. Design of Hydraulic Bushings for Electric Wheel Suspension System Considering Torque Ripple[J]. Transactions of the Chinese Society for Agricultural Machinery,2016,47(7):354-360.

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  • 收稿日期:2016-01-18
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  • 在線發(fā)布日期: 2016-07-10
  • 出版日期: 2016-07-10