| 非线性能量阱对汽车车身垂向振动的抑制效果 |
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| 引用本文： | 甄冬,李堃,刘晓昂,张佳琪.非线性能量阱对汽车车身垂向振动的抑制效果[J].中国机械工程,2022,33(1):24-33. |
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| 作者姓名： | 甄冬 李堃 刘晓昂 张佳琪 |
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| 作者单位： | 1.河北工业大学机械工程学院，天津，300130
2.天津市新能源汽车动力传动及安全技术重点实验室，天津，300130 |
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| 基金项目： | 国家自然科学基金（52175084，51705128，U20A20331）；
河北省自然科学基金（E2019202169） |
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| 摘 要： | 为控制动力总成激励引起的车身垂向振动，建立了车身增加立方刚度非线性能量阱和负刚度非线性能量阱的动力总成-车身-轮胎的三自由度汽车模型。基于复变量平均法分别推导了两个系统的慢变方程，研究了系统鞍结分岔边界条件，并对平衡点稳定性进行了分析。数值分析表明，优化后的立方刚度非线性能量阱能有效减小车身在其固有频率处的振动；与立方刚度非线性能量阱相比，负刚度非线性能量阱具有更好的减振效果。
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| 关 键 词： | 非线性能量阱 复变量-平均法 参数优化 汽车车身 振动抑制 |
Suppression Effectiveness of NES for Vehicle Body Vertical Vibrations |
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| ZHEN Dong,LI Kun,LIU Xiaoang,ZHANG Jiaqi.Suppression Effectiveness of NES for Vehicle Body Vertical Vibrations[J].China Mechanical Engineering,2022,33(1):24-33. |
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| Authors: | ZHEN Dong LI Kun LIU Xiaoang ZHANG Jiaqi |
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| Affiliation: | 1.School of Mechanical Engineering,Hebei University of Technology,Tianjin,300130
2.Tianjin Key Laboratory of Power Transmission and Safety Technology for New Energy Vehicles,Hebei University of Technology,Tianjin,300130 |
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| Abstract: | In order to control the vertical vibrations of the vehicle body caused by the excitation of powertrain, 3-DOF vehicle powertrain-body-tire models with cubic stiffness NES and negative stiffness NES on body were established. Based on the complex-averaging method, the slow-varying equations of the two systems were deduced, the saddle-junction bifurcation boundary conditions of the system were studied, and the stability of the equilibrium point was analyzed. Numerical analysis shows that the optimized cubic stiffness NES may effectively reduce the vibrations of the vehicle body at the natural frequency; the negative stiffness nonlinear energy sink has a better damping effect than that of the cubic stiffness nonlinear energy sink. |
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| Keywords: | nonlinear energy sink(NES) complex-averaging method parameter optimization vehicle body vibration suppression |
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