Vibration Control Analysis of Modular Steel Structures of Trestles with Vibration Reduction Substructures
In order to analyze the horizontal vibration damping control of modular steel structures of trestles,a new type of structural system—a modular trestle structure with a shock absorber substructure is proposed.In the design,the conveyor is connected to the main structure of the trestle with semi-rigid nodes.A viscous damper is set between the bottom of the conveyor and the main structure of the trestle.The conveyor is transformed into a shock absorber structure to form the modular trestle structure containing a shock absorber substructure.Using the method of finite element analysis,the parameter analysis of the stiffness and damping coefficients of the semi-rigid node is carried out in the frequency domain so as to control the vibration response of the main structure of the trestle and the conveyor in the horizontal direction.The calculation results show that there exist optimal parameters so that the horizontal vibration of the module trestle can be controlled.Finally,setting the trestle structure with shock absorbers is as the optimal parameter in the time domain,its vibration-damping effect under the wind load is analyzed.The results show that this system can better control the wind vibration response of the structure.The optimal stiffness coefficient of semi-rigid joint and damping coefficient of the damper can obviously reduce the wind-vibration dynamic response of the trestle main structure and the belt conveyor.
vibration and wavemodular steel structure of trestlevibration-damping controlfinite element analysisvibration damper structurewind vibration response
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