约束扭转对汽车车架模态的影响

本文通过三种典型车架模态的实验和计算研究,探讨了约束扭转对汽车车架各阶模态的影响。结果表明:约束扭转对扭转模态影响较大,在研究开口薄壁结构的车架模态时,必需考虑约束扭转的影响,一阶扭转模态对横梁刚度的变化十分敏感。

Effect of Warping Torsion on Vibration Modes of Vehicle Frame

This paper discusses the effect of warping torsion on the vibration modes of vehicle frame. The testing and calculating results that warping torsion provides a relatively large contribution to torsional modes. So the warping torsion should be considered when studying vibration modes of vehicle frame with thin-walled open section. Besides, the first torsional mode of the frame is extremely sensitive to the stiffness of the cross-members.