王永旭,朱大鹏,周燕.浮放运输货物在冲击载荷下倾覆风险研究[J].包装工程,2024,45(7):281-288.
WANG Yongxu,ZHU Dapeng,ZHOU Yan.Capsizing Risk of Floating Cargo under Impact Load[J].Packaging Engineering,2024,45(7):281-288. |
| 浮放运输货物在冲击载荷下倾覆风险研究 |
| Capsizing Risk of Floating Cargo under Impact Load |
| 投稿时间：2023-12-29 |
| DOI：10.19554/j.cnki.1001-3563.2024.07.035 |
| 中文关键词: 刚性质量块 冲击载荷 摇摆特性 倾覆风险 加速度频谱 |
| 英文关键词: rigid mass block impact load rocking characteristic capsizing risk acceleration spectrum |
| 基金项目:甘肃省教育厅青年博士支持项目(2023QB-037);天津大学-兰州交通大学自主创新基金合作项目(2022063) |
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| 中文摘要: |
| 目的 对浮放运输货物在车辆冲击载荷下摇摆特性进行分析和其倾覆风险评价。方法 将浮放运输的货物或包装件简化为刚性质量块，载运车辆建模为具有一定水平加速度载荷的刚性支座，推导出刚性质量块在加速度载荷下的摇摆运动控制方程，通过试验设计测取车辆减速制动工况下冲击载荷波形，建立冲击载荷波数学表达式，采用理论分析方法在近似线性化范围内分析冲击载荷下刚性质量块的动态摇摆特性与倾覆风险。结果 刚性质量块在正向加速度载荷下进入摇摆，响应初始摇摆角度小于0并且倾覆是发生在自由振动状态下;绘制了刚性质量块在半正弦波冲击载荷下最小倾覆加速度频谱，存在一条边界线将频谱划分为安全区和倾覆区;刚性质量块的宽高比和稳定性呈正相关。结论 通过转变为刚性质量块摇摆响应系统问题线性近似研究了浮放运输货物的摇摆特性和倾覆风险。 |
| 英文摘要: |
| The work aims to analyze the rocking characteristics of floating transport cargoes under vehicle impact load and evaluate their capsizing risks. The floating cargo or package was simplified into a rigid mass block, and the carrying vehicle was modeled as a rigid support with a certain horizontal acceleration load. The governing equation of the rocking motion of the rigid mass block under the acceleration load was derived. The impact load waveform of the vehicle under the deceleration braking condition was measured through the test design, and the mathematical expression of the impact load wave was established. The dynamic rocking characteristics and capsizing risks of rigid mass blocks under impact loads were analyzed by the theoretical analysis method in the approximate linearization range. When the rigid mass entered the rocking response under the forward acceleration load, the initial rocking angle was less than 0 and it was capsized in the free vibration state. The minimum capsizing acceleration spectrum of the rigid mass block under the impact load of half sine wave was plotted. There was a boundary line to divide the spectrum into the safe zone and the capsizing zone. The aspect ratio of the rigid mass block was positively correlated with its stability. The rocking characteristics and capsizing risk of floating cargoes are studied by linear approximation of the rocking response system problem transformed into a rigid mass block. |
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