Simulation And Finite Element Analysis Of Wind Effect Of Tower Crane Structure

In recent years,with the continuous improvement of China’s urbanization process and the continuous improvement of building technology,China’s demand for high-rise buildings and the demand for construction land have increased.Among them,tower cranes,as an indispensable construction equipment in the construction of high-rise buildings,play an irreplaceable role in the construction process.Due to the high and soft characteristics of the tower crane structure,the wind load is more affected by its force.Wind tunnel test methods for analyzing wind loads in practical projects are widely used,but wind tunnel tests have problems such as high cost and long cycle.With the continuous development of computer level,continuous improvement of capacity and calculation speed,the advantages of CFD simulation have gradually emerged,and it has become a hot spot in the research and application of various universities in recent years.The latter is superior to the wind tunnel test.However,as far as the current situation is concerned,the application technology of the numerical simulation method of wind load is still immature,and it is not directly used in the specification,and it is not much in practical use.Therefore,numerical simulation of high-rise wind loads has extremely important engineering use value.This paper firstly builds the fluid domain model and structural model based on the 1:1 model size,and simulates the dynamic wind load with RNG k-ε and SST k-ωphysical turbulence models,respectively.The bottom shear force value,the bending moment value,the wind load value and the bending moment value of the tower arm are analyzed and calculated,and the wind load of the tower subjected to the shear force station is analyzed.The bending moment value of the tower arm part is 70%～95%of the bending moment value of the whole body,and the variation of the overall shape coefficient value of the tower crane structure at different angles with the wind direction angle is analyzed,and the conclusion is drawn that the tower crane The maximum figure factor appears at a 90° wind direction angle,and the final result is compared with the experimental structure to verify the reliability of the simulation.The ANSYS finite element model is established with a 1:1 model size,and the tower crane structure is analyzed in time domain.The wind speed of the B wind field is generated by the harmonic synthesis method and the wind speed is converted into the node force applied to each key point of the tower crane structure.The kinetic method performs time domain analysis on it.By comparing the wind-induced vibration coefficient,acceleration and displacement response of each section of the tower crane under different wind direction angles of the B-type wind field,the maximum sloshing position and the maximum acceleration position of each section of the tower crane structure are analyzed,and the most unfavorable working angle and the most Fragile segment.