The Simulation Analysis For The Body Of The Self-erected Tower Crane On The Folding Process Based On Virtual Prototype

The self-erected tower crane plays an important role in the construction of the new urbanization due to the characteristics of the convenient and rapid installation, favorable adaptability for the whole transportation and so on, the crane is an important equipment to improve the efficiency of construction and ensure the safety in production. Improving its design level has an important significance on promoting development of the tower crane industry in our country. The dynamics and structural strength analysis of the body of tower crane on the folding process are completed by using the Pro/E, ADAMS, ANSYS based on the virtual prototype technology. The research can provide the theory basis for the design and optimization of the self-erected tower crane. The main research of the thesis includes:(1) Based on the introduction of the structure of the self-erected tower crane, the theory of working and erecting are discussed in detail. The 3D model of tower crane is created and the modeling method of the key parts including crane jib is introduced.(2) The simulation models of motion stages as the inner tower body take back and the tower body pull down are created, the kinematics and dynamics analysis of the models about the two stages is finished, the displacements, velocities, accelerations of the main parts and the forces about each hinge point have been obtained. At last, the theoretical statics analysis about each hinge point is finished, which verifies the reliability of the simulation models.(3) The static stress and strain of the tower body under three working conditions are obtained by ANSYS. The results show that the stiffness and strength can meet the design requirement. The theoretical method of material mechanics is used to calculate the strength of the tower body, the results verify the accuracy of the finite element model.(4) Based on ADAMS and ANSYS, the rigid-flexible coupling models are built by using the flexible link of tower body. The differences of the kinematics and dynamics on the rigid and flexible tower body are also discussed. Finally, the structure strength of linkage of tower body is discussed, The results show the strength is enough.Based on the simulation analysis with the tower crane’s body on folding process, the research way that includes the kinemics, dynamics and the finite element analysis of structure on the self-erected tower crane is obtained. The research will help to improve the level of design and to decrease the development cost of the self-erected tower crane, it also play an important promoting roles for the industry of the self-erected tower crane.