Dynamic Substructure Method For The Coupling Vibration Analysis Between Well Tower Structure And Hoisting System

As an important part of colliery, well tower structure and main hoisting system are very important equipments which linked underground and above-ground. Hoisting system will produce violent vibration in the upgrading process, and well tower structure is influenced greatly by the vibration. Also, the quality characteristics、the stiffness characteristics and the damping characteristics of well tower structure have a very important influence on the vibration of hoisting system. Hence, well tower structure and main hoisting system are inseparable complete unity. At present, in our country and abroad, the researches on coupled vibration have been becoming more and more mature. However, due to the complexity of well tower structure and hoisting system, the calculation cost is very large when ansysing the vibration performance of tower structure and hoisting system. If the dynamic simulation software is used to simulate the vibration process, the computation difficulty is too great to realize.Based on ANSYS and ADAMS, the dynamic substructure method is used to analyze the coupling vibration of the well tower and hoisting system. The dynamic responses of well tower structure and hoist system are obtained and the results are compared with the actual measured values to evaluate effectiveness of dynamic substructure method in the coupling vibration analysis of well tower and hoisting system. Firstly, the finite element model of well tower structure is established in ANSYS, the equivalent stiffness matrix associated to hoisting system is given by the multi-step static analysis of the well tower structure, and the damping coefficients are calculated based on Rayleigh damping theory from the modal analysis of well tower structure. Then, an ADAMS model of hoisting system is established based on the equivalent stiffness matrix and Rayleigh damping coefficients. The reaction forces applied to the well tower structure are abtained from the dynamic simulation of upgrading process of hoisting system. Finally, the dynamics responses of well tower structure are calculated by actiong the forces calculated on the well tower structure.