The Finite Element Analysis And Optimization Design For The Upper Structure And Portal Of Bucket Wheel Stacker-Reclaimer

As a type of continuous handling machinery, bucket wheel stacker-reclaimer is mainly applied in stacking, digging and homogenizing the bulk material in the stockyard. As a typical large non-standard equipment, whether the design parts of main structure is reasonable related to whether the safe and steady operation of stacker-reclaimer. This article is based on a DQL1000/2000.38.5-type bucket wheel stacker-reclaimer newly developed by an enterprise, design and optimization analysis of the upper structure and portal has been carried out based on the CAD design and CAE optimization techniques.1. The overall layout of bucket wheel stacker-reclaimer is introduced, and its performance parameter is determined based on technical requirements. The composition of upper structure and portal is described in detail.2. The working conditions and loads under the working conditions are analysed and calculated in detail. The finite element analysis model of upper structure is established based on ANSYS. Statical analysis with finite element method under different working condition is performed. The distributing of displacement and Von Mises stress of upper structure as a whole and its components under different working condition are obtained, and stiffness and strength is checked according to correspond assessment rules. The location of centre of gravity and ground force of upper structure under different working condition are calculated, and the stability of bucket wheel stacker-reclaimer is analysed based on the calculation results. The loads of portal under different working condition are calculated, and the finite element analysis model of portal is established based on ANSYS. Statical analysis with finite element method under the worst working condition is performed, and the distributing of displacement and Von Mises stress of portal are obtained. The weak load bearing location of portal is determined.3. The basic theory of modal analysis is described. The finite element model of modal analysis of upper structure is established based on ANSYS, and the first ten natural frequencies and mode shapes are obtained. By comparing the vibration frequency and natural frequency, it is verified that the resonance of bucket wheel stacker-reclaimer will not occur.4. The weak structure of load bearing of portal is improved, and mathematical model of size optimization of portal is established on the basis. Size optimization analysis is carried out, and bearing capacity of portal is further improved. The finite element analysis model of fatigue life of portal is established based on structure optimization, and the fatigue life is calculated. The results showed that the improved portal structure satisfies the requirements of design fatigue strength.