摘要
货物在物流运输过程中常常以堆码形式存在,为获取堆码货物在物流随机振动下的响应,考虑堆码货物与车辆之间的耦合作用,建立19自由度车辆-堆码货物耦合模型。根据实际道路的统计特征并考虑随机路面障碍物合成非平稳路面激励,得出非平稳路面激励下的系统响应,结果表明:车辆响应的峰值频率主要在1~3 Hz和10~20 Hz两个区间,与实测的车辆响应峰值频率接近;随着上层货物刚度的增大,上层货物的响应有减小趋势,而下层货物的响应逐渐变大,两层货物响应的加速度均方根(Grms)逐渐接近;在相同的激励下,上层货物响应的Grms大于下层货物;两层货物质量比大于0.6时,上层货物的侧倾和俯仰响应较大,堆码货物稳定性较差。当两层货物质量比小于0.6且两层货物刚度比大于0.8时,两层堆码货物的稳定性最佳。研究结果可为堆码货物的运输包装设计提供参考。
Cargo often exists in the form of stacking in the process of logistics transportation.To obtain the response of stacked goods under the random vibration of logistics,a 19-DOF vehicle-stacked cargo coupling model was established.According to the statistical characteristics of the actual road and considering the random road obstacles,the system response under the non-stationary road excitation was obtained.The results show that the peak frequency of the vehicle response is mainly in 1-3 Hz and 10-20 Hz,close to the measured peak frequency of the vehicle response.With the increase of the stiffness of the upper layer cargo,the response of the upper layer cargo decreases,while the response of the lower layer cargo gradually increases,and the acceleration root mean square(Grms)of the response of the two layers of cargo gradually approaches.Under the same excitation,the response of the upper layer cargo Grms is larger than that of the lower layer cargo.When the mass ratio of two layers of cargo is greater than O.6,the response of the upper layer cargo to roll and pitch is larger,and the stability of the stacked cargo is poor.When the mass ratio of the two layers of cargo is less than O.6 and the rigidity ratio of the two layers of cargo is larger than O.8,the stability of cargo stacked by the two layers of cargo is the best.The research results provide a reference for the design of transportation package of stacked cargo.
作者
欧阳日上
王志伟
OUYANG Rishang;WNAG Zhiwei(College of Packaging Engineering,Jinan University,Zhuhai 519070,Guangdong,China;Key Laboratory of Product Packaging and Logistics,Guangdong Higher Education Institutes,Jinan University,Zhuhai 519070,Guangdong,China;Packaging Engineering Institute,Jinan University,Zhuhai 519070,Guangdong,China)
出处
《噪声与振动控制》
北大核心
2025年第6期40-45,51,共7页
Noise and Vibration Control
基金
国家自然科学基金资助项目(50775100)。
关键词
振动与波
非平稳
加速度响应
车辆货物耦合系统
堆码货物
vibration and wave
non-stationary
acceleration response
vehicle-cargo coupling
stacked cargo
作者简介
欧阳日上(1998-),男,江西省九江市人,硕士研究生,专业方向为运输包装。E-mail:oy1693262098@126.com;通信作者:王志伟(1963-),男,博士生导师,专业方向为工程力学和产品包装工程。E-mail:wangzw@jnu.edu.cn。
