由于加速度范围的原因，无法得到优化结果，意味着传统的薄壁管压缩结构不利于对行人下肢的保护作用。
Because of the scale of acceleration, compressing thin-walled tube is very difficult to achieve the standard of pedestrian protection.
根据试验结果，提出合理的振型、基频建议公式和加速度分布系数建议图形及大圆筒结构适用范围。
Proposals for formulas of mode of vibration and frequency, figures for distribution of acceleration coefficient and scope of application are rationally suggested.
在一定范围内，随着缓冲材料厚度的增加，碰撞时间与接触面积线性增加，最大加速度与损伤体积相应减小。
In a definite scope, the impact time and contact area are linearly increased while the maximum acceleration and bruise volume reduced with the increment of thickness of cushion materials.
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