In this study,a human-sensitive frequency band vibration isolator(HFBVI)with quasi-zero stiffness(QZS)characteristics for heavy-duty truck seats is designed to improve the comfort of heavy-duty truck drivers on uneven...In this study,a human-sensitive frequency band vibration isolator(HFBVI)with quasi-zero stiffness(QZS)characteristics for heavy-duty truck seats is designed to improve the comfort of heavy-duty truck drivers on uneven roads.First,the analytical expressions for the force and displacement of the HFBVI are derived with the Lagrange equation and d'Alembert's principle,and are validated through the prototype restoring force testing.Second,the harmonic balance method(HBM)is used to obtain the dynamic responses under harmonic excitation,and further the influence of pre-stretching on the dynamic characteristics and transmissibility is discussed.Finally,the experimental prototype of the HFBVI is fabricated,and vibration experiments are conducted under harmonic excitation to verify the vibration isolation performance(VIP)of the proposed vibration isolator.The experimental results indicate that the HFBVI can effectively suppress the frequency band(4-8 Hz)to which the human body is sensitive to vertical vibration.In addition,under real random road spectrum excitation,the HFBVI can achieve low-frequency vibration isolation close to 2 Hz,providing new prospects for ensuring the health of heavy-duty truck drivers.展开更多
机电馈能悬挂系统是一种新型悬挂系统,在实现装甲车辆车身减振同时回收地面传递给车身的振动能量。根据摆臂式机电馈能悬挂系统工作原理,建立了相应数学物理模型,基于Adams和AMEsim搭建了减振系统与馈能系统联合仿真模型,分析了行星变...机电馈能悬挂系统是一种新型悬挂系统,在实现装甲车辆车身减振同时回收地面传递给车身的振动能量。根据摆臂式机电馈能悬挂系统工作原理,建立了相应数学物理模型,基于Adams和AMEsim搭建了减振系统与馈能系统联合仿真模型,分析了行星变速器传动比、电池电阻和扭转缓冲器刚度对系统阻尼特性和馈能性能的影响。结果表明:在车速为45 km/h的铺面路、戈壁路、起伏路、砂石路4种路面工况下,车身加速度均方根值平均为4.11 m/s 2,平均馈能功率为1411.57 W,机电馈能悬挂系统有良好的减振性能和可观的馈能功率;随着行星变速器传动比增大,悬挂系统阻尼力矩和馈能功率逐渐增大,且影响显著;随着电池电阻增加,阻尼力矩和馈能功率逐渐降低;扭转缓冲器刚度变化对悬挂系统性能影响较小。展开更多
基金supported by the National Natural Science Foundation of China(No.12172226)。
文摘In this study,a human-sensitive frequency band vibration isolator(HFBVI)with quasi-zero stiffness(QZS)characteristics for heavy-duty truck seats is designed to improve the comfort of heavy-duty truck drivers on uneven roads.First,the analytical expressions for the force and displacement of the HFBVI are derived with the Lagrange equation and d'Alembert's principle,and are validated through the prototype restoring force testing.Second,the harmonic balance method(HBM)is used to obtain the dynamic responses under harmonic excitation,and further the influence of pre-stretching on the dynamic characteristics and transmissibility is discussed.Finally,the experimental prototype of the HFBVI is fabricated,and vibration experiments are conducted under harmonic excitation to verify the vibration isolation performance(VIP)of the proposed vibration isolator.The experimental results indicate that the HFBVI can effectively suppress the frequency band(4-8 Hz)to which the human body is sensitive to vertical vibration.In addition,under real random road spectrum excitation,the HFBVI can achieve low-frequency vibration isolation close to 2 Hz,providing new prospects for ensuring the health of heavy-duty truck drivers.
文摘机电馈能悬挂系统是一种新型悬挂系统,在实现装甲车辆车身减振同时回收地面传递给车身的振动能量。根据摆臂式机电馈能悬挂系统工作原理,建立了相应数学物理模型,基于Adams和AMEsim搭建了减振系统与馈能系统联合仿真模型,分析了行星变速器传动比、电池电阻和扭转缓冲器刚度对系统阻尼特性和馈能性能的影响。结果表明:在车速为45 km/h的铺面路、戈壁路、起伏路、砂石路4种路面工况下,车身加速度均方根值平均为4.11 m/s 2,平均馈能功率为1411.57 W,机电馈能悬挂系统有良好的减振性能和可观的馈能功率;随着行星变速器传动比增大,悬挂系统阻尼力矩和馈能功率逐渐增大,且影响显著;随着电池电阻增加,阻尼力矩和馈能功率逐渐降低;扭转缓冲器刚度变化对悬挂系统性能影响较小。
