一种二自由度减振气囊设计及整机运输仿真

Design of Vibration-absorbent Airbag with Two Degrees of Freedom and Transportation Simulation of Complete Machine

目的设计一种二自由度的减振气囊装置,模拟整车运输过程,并计算仿真验证结构的减振性能,为后续研究整车货运包装减振提供基础。方法根据达朗贝尔原理简化被包装易碎件在运输过程中的理论模型,并建立车辆的运动学方程。使用Simulink等软件模拟滤波白噪声时域模型,并进行求解,通过振动模型分析得出与运输安全相关联的3个振动分析图,最后建立合适振动模型的评价机制。结果通过理论模型和仿真演示得到,在常规行驶速度40~50 km/h条件下,减振气囊的振幅为0.02 m,角变化范围为0.004~0.009 rad。结论在相关易碎件运输过程中,基于二自由度的减振气囊系统可靠性较好。

The work aims to design a kind of vibration-absorbent airbag with two degrees of freedom, simulate the transport process of the complete vehicle and calculate the vibration absorption performance of the structure for simulation and verification, so as to lay a foundation for the follow-up study on the vibration absorption of shipping packaging for the complete vehicle. According to the D＇Alembert＇s principle, the theoretical model of packaged fragile parts in the transport process was simplified and the kinematic equations were established. The time domain model of filtered white noise was simulated and solved by Simulink and other software. Three vibration analysis diagrams associated with traffic safety was obtained by vibration model analysis. Finally, the evaluation mechanism suitable for the vibration model was established. The amplitude and the angle change range of vibration-absorbent airbag is 0.02 m and 0.004~0.009 rad when the normal speed of 40~50 km/h. In the transport process of the relevant fragile parts, the vibration-absorbent airbag system based on the two degrees of freedom is of good reliability.