Finite Element Analysis And Experimental Study For Tower Crane Under Inclined Pull Force Working Condition

Tower crane is widely used in the large construction projects with the advantages of large working range and high lifting height,such as, the large venues, the high-rise buildings, the water conservancy and hydropower, the thermal power and nuclear power, the elevated bridges, etc. In order to ensure the tower crane is operated rightly and safely, the national standard of “Design rules for cranes”(GB/T 3811-2008) regulates that all cranes must be installed the corresponding safety devices. The torque limiter is the most critical safety device for guaranteeing the stable and safe operation of the cranes.However, the tower crane accidents have being often occurred in the actual usage stage, even if the torque limiter and other safety devices has militated significant protective effect. In case of accidents, the light will lead to equipment structural damage, and will lead to the plane crash tragedy. Therefore, this paper will to carry out the theoretical and experimental research work about the formation causes and damage impact of the tower cable-stayed phenomenon based on ABAQUS, taking the TC6012-6A tower crane manufactured by Zoomlion as the research object. It is important for putting forward the prevention measures of tower crane accidents, reducing the incidence of accidents, and ensuring the safety in production.The composition and the loading features of the TC6012-6A is analyzed, the various components of the unit type and ma terial properties is defined based on the equivalent structure simplification principle, and the ABAQUS finite element analysis model of the TC6012-6A tower crane is established at last. According to the test outline, the stress data of selected point under different operating conditions is measured, and the finite element model is verified by the compare of the actual stress data with the calculation at the same position under the same conditions.Combined with the analysis of the trolley travelling and the rotational movement, the causes of the tower cable-stayed is found, at the same time, the analysis model is established. According to the lifting performance and the technical parameters of trolley travelling and slewing mechanism of the TC6012-6A, the theoretical maximum output traction of the trolley mechanism and slewing mechanism is calculated.The stiffness coefficient curve of the "tower crane-wire rope" system is acquired through the finite element calculation and stress analysis. The effect on the structure damage caused by the cable-stayed phenomenon of the horizontal movement is analyzed and the experimental research is carried out under the different working conditions. Lastly, this paper puts forward the solution for preventing the luffing torque and weight from increasing when cable-stayed phenomenon is occurred, so we can reduce the incidence of accidents effectively.