摘要
通过瞬态动力学模拟和对比泵送混凝土试验,分析了柔性超长混凝土泵车臂架系统振动机理。研究发现,臂架系统振动的主要因素为管道内混凝土脉动载荷。基于振动机理,提出了振动机理混凝土脉动速度的优化模型。分析结果表明,随着速度梯度值增加,应力幅值和末端振幅降低。基于双泵送模块的流量补偿对比测试结果显示,开启流速补偿后,末端振幅降低70%,应力幅值减少60%,臂架系统振动情况得到了改善,这为改善柔性超长混凝土泵车臂系统的振动稳定性提供了新的解决方案。
Through transient dynamic simulation and comparative pumping concrete test,the vibration mechanism of the boom system of flexible ultra-long concrete pump truck is analyzed.It is found that the main factor of boom system vibration is the pulsating load of concrete in the pipeline.Based on the vibration mechanism,an optimization model of concrete pulsation velocity is proposed.The analysis results show that with the increase of velocity gradient,the stress amplitude and terminal amplitude decrease.The comparative test results of flow compensation based on double pumping modules show that the end amplitude is reduced by 70%and the stress amplitude is reduced by 60%after the flow compensation is turned on,and the vibration of the boom system is improved,which provides a new solution for improving the vibration stability of the flexible and super-long concrete pump truck boom system.
作者
郭松
章艺嵩
王佳茜
李鹏
谭明
周围
GUO Song;ZHANG Yisong;WANG Jiaqian;LI Peng;TAN Ming;ZHOU Wei(National Engineering Research Center for Concrete Machinery,Changsha 410205,Hunan,China;Zoomlion Heavy Industry Science&Technology Co.,Ltd.,Changsha 410013,Hunan,China)
出处
《中国工程机械学报》
北大核心
2025年第4期611-616,共6页
Chinese Journal of Construction Machinery
基金
湖南省自然科学基金资助项目(2023JJ40688)。
关键词
振动机理
振动优化
瞬态动力学模拟
流速补偿
混凝土泵车
vibration mechanism
vibration optimization
transient dynamic analysis
velocity compensation
concrete pump truck
