Mechanical characterization of the whole lifting process of the tower crane

Abstract

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

CLC Number:

TH212

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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