冲击载荷下浮放包装件摇摆特性和倾覆风险研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (10) : 30-36.

论文

朱大鹏1，曹兴潇2，祁振民3

作者信息 +

Rocking properties and overturning risk of a freestanding package excited by longitudinal shock

ZHU Dapeng1，CAO Xingxiao2，QI Zhenmin3

Author information +

文章历史 +

摘要

浮放包装件运输过程中，在冲击载荷下可能产生倾覆，严重威胁着运输安全，分析浮放包装件在纵向冲击载荷下的倾覆风险对于确保运输安全十分重要。本文采用基于指数函数的分段函数模拟车辆制动产生的单峰值钟形冲击加速度，构建浮放包装件在纵向冲击载荷下摇摆运动方程式。对于宽高比角度α较小的包装件，线性化运动方程式，分别在β≠pT和β=pT两种情况下推导包装件摇摆运动方程式和倾覆边界条件，分析结果表明，在自由响应阶段，包装件更容易倾覆。对于宽高比角度α较大的包装件，基于对包装件摇摆运动方程式的能量分析，构建包装件非线性摇摆倾覆边界条件，模拟结果表明，该近似分析法具有良好的准确性。

Abstract

In cargo transportation, the large-scale freestanding package may overturn under longitudinal shock condition, this may lead to catastrophic consequences. Therefore, the analysis of overturning risks of freestanding package under longitudinal shock condition is critical to the package transportation safety. In this paper, the 3-parameter piece-wise function based on exponential expression is used to simulate single-lobe bell-shape shock acceleration produced by vehicle braking, the package is modeled by rigid rectangle block, the rocking motion equation of package is formulated. For small width-height ratio package, the rocking motion equation is linearized, the rocking response equation and overturning boundary condition are obtained analytically under β≠pT and β=pT conditions respectively, the analytical results indicate the freestanding package is more prone to overturn in free response phase. For non-slender package, the package rocking motion equation is rewritten in energy representation form, the approximation method for overturning boundary condition estimation is formulated. The numerical simulation results indicate the accuracy of this estimation method is acceptable.

导出引用

朱大鹏1，曹兴潇2，祁振民3. 冲击载荷下浮放包装件摇摆特性和倾覆风险研究[J]. 振动与冲击, 2024, 43(10): 30-36

ZHU Dapeng1，CAO Xingxiao2，QI Zhenmin3. Rocking properties and overturning risk of a freestanding package excited by longitudinal shock[J]. Journal of Vibration and Shock, 2024, 43(10): 30-36

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