汽车燃油箱减振元件设计方法研究

Research on the design method of damping element for automotive fuel tank

汽车刹车之后油箱的燃油晃动噪声会引起车内驾驶员和乘客的不适,采用油箱减振元件是降低车内燃油晃动噪声的较为方便的手段。通过理论推导研究燃油晃动时油箱对车身的传递力,得出减振元件的效果主要由车身、油箱的局部机械导纳以及减振元件的柔度确定的结论。根据传递路径分析方法,设计了车身的力和加速度传递函数测量实验和整车制动实验,计算了减振元件工作时车身的受力情况。根据理论研究结果提出了一套油箱减振元件设计方法。

The fuel sloshing noise from the fuel tank after car braking would make driver and passenger uncomfortable. Using damping elements for the tank is a convenient method to reduce the fuel sloshing noise. Through theoretical derivation of the force translated from the tank to the car body when the fuel sloshes, it is concluded that the damping effect of the damping element is mainly determined by the mechanical admittances of the tank and car body as well as the flexibility of the damping element. According to the transfer path analysis method, the transfer function measure- ment experiment and the vehicle braking experiment are designed to calculate the force on the damping element. Based on the result of theoretical research, the design method of damping element for automotive fuel tank is proposed.