塔式起重机起吊全过程力学特性研究

兰州理工大学学报 ›› 2024, Vol. 50 ›› Issue (4): 55-59.

塔式起重机起吊全过程力学特性研究

张堆学^*

兰州路域产业综合开发有限公司, 甘肃兰州 730000

收稿日期:2024-01-11 出版日期:2024-08-28 发布日期:2024-08-30
通讯作者: 张堆学(1975-),男,甘肃庄浪人,高级工程师.Email:740445512@qq.com

Mechanical characterization of the whole lifting process of the tower crane

ZHANG Dui-xue

Lanzhou Luyu Industrial Comprehensive Development Co. Ltd., Lanzhou 730000, China

Received:2024-01-11 Online:2024-08-28 Published:2024-08-30

摘要/Abstract

摘要： 针对塔式起重机起吊过程中稳定性问题,以某型号平头塔式起重机为研究对象,对起吊全过程的静力学和瞬时动力学展开了研究.利用有限元静力学,探究了在静风工况和正常工况下塔式起重机不同起吊位置和不同起吊重量与位移响应的关系.结果表明,静力学分析时塔式起重机在静风工况和正常工况下具有相近的变化幅值和趋势,且风载荷对塔式起重机的位移响应影响显著.同时,在惯性力作用下,基于瞬态动力学分析了起吊加速度不同时塔式起重机的位移响应.结果表明:在60 m幅度处与30 m幅度处起吊时最大位移响应相差71.8 mm,平均位移响应相差63.4、63.6、64和64.1 mm,二者具有相近的波动幅值和变化趋势,说明缓慢起吊时位移响应对起吊位置不敏感;此外,二者位移响应均呈现起伏趋势,说明在起吊过程中明显存在塔机晃动现象.

关键词: 塔式起重机, 风载荷, 静力学分析, 瞬态动力学分析

Abstract: Aiming at the stability of tower crane lifting process, this study takes a certain type of flat-top tower crane as the research object, and carries out the static mechanics and transient dynamics research of the whole lifting process. Firstly, the finite element static analysis is used to solve the relationship between the tower crane’s displacement response at different lifting positions and different lifting weights under the static wind condition and normal working condition, and the results show that: the static analysis shows that the tower crane has similar amplitude and trend of change under the static wind condition and normal working condition, and the wind load has a greater contribution to the tower crane's displacement response; under the consideration of the inertial force of tower crane, based on the transient dynamics analysis, the tower crane's mechanical performance is affected by the transient dynamics analysis, which is the most important factor in the mechanical performance of tower crane. Under the action of tower crane inertia force, based on the transient dynamics analysis, the maximum deformation response of the tower crane under different lifting acceleration is unfolded, and the results show that: the difference of the maximum displacement response is 71.8 mm between the lifting at 60 m amplitude and 30 m amplitude, and the difference of the average displacement response is 63.4 mm, 63.6 mm, 64 mm, and 64.1mm, both of which have similar fluctuation amplitude and trend, indicating that the tower displacement response under the slow lifting condition has a similar change amplitude and trend. Both of them have similar fluctuation amplitude and change trend, indicating that the tower displacement response is not sensitive to the lifting position in the case of slow lifting; in addition, both of them show the undulation trend, which indicates that there is an obvious shaking phenomenon of the tower crane in the process of lifting.

Key words: tower crane, wind load, statics analysis, dynamics analysis

中图分类号:

TH212

张堆学. 塔式起重机起吊全过程力学特性研究[J]. 兰州理工大学学报, 2024, 50(4): 55-59.

ZHANG Dui-xue. Mechanical characterization of the whole lifting process of the tower crane[J]. Journal of Lanzhou University of Technology, 2024, 50(4): 55-59.

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