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Influence of different parameters on swing angles of payload and structural vibration of tower crane

Published:2023-11-01 author:LIU Fu, YANG Jianwei, XIE Yidong. Browse: 431 Check PDF documents

Influence of different parameters on swing angles of payload and structural

vibration of tower crane

LIU Fu1, YANG Jianwei1,2, XIE Yidong1

(1.School of Mechanical-electronic and Vehicle Engineering, Beijing University of Civil Engineering and Architecture, Beijing

100044, China; 2.Beijing Engineering Research Center of Monitoring for Construction Safety, Beijing 100044, China)

Abstract: Although great achievements have been made in the research on the vibration characteristics of the tower crane structure, many literatures studied the tower crane structure as a rigid structure, or did not consider the impact of the acceleration of the tower crane on the payload swing angles. There are few references on the structural vibration and space swing angle characteristics of the tower crane under the lifting and slewing coupling motion. Aiming at the problem of structural vibration in tower crane caused by nonlinear motion, in order to explore motion law of tower crane, structural vibration characteristics of tower crane were studied by means of theory and simulation analysis under the lifting and slewing coupling motion. First of all, the displacement models of the tower crane were established from acceleration to constant speed to deceleration, which considered the operating characteristics, physical relationship and beam deflection. Then, the dynamic models of the coupling motion were established based on Lagrange dynamics and air resistance. Finally, according to the actual structure and motion characteristics of the tower crane, the test machine of the tower crane was designed, and the tower crane test machine was used to build a test platform, and the effectiveness of the coupled models were verified by the experiment of payload swing angles. As well, effects of different lifting acceleration, slewing acceleration and initial swing angles of tower crane on the spatial swing angles and mast vibration were explored. The results prove that the slewing acceleration has a significant influence on the mast vibration and spatial swing angles. The lifting acceleration has a little effect on the mast vibration and spatial swing angles. When the lifting acceleration is 0.01m/s2, the swing angle θ is the minimum value. When any initial angle is not less than 0.2 rad, the initial angles have a great influence on the vibration of the mast vibration and swing angles.

Key words: tower crane; nonlinear motion; crane mast structural vibration; lifting and slewing coupling motion; swing angle vibration; dynamics model

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