Research On Optimization Design Of Trough Frame For Rare Earth Extraction Production Line

As one of the major part of the rare earth extraction production line,rack’s structure performance directly affect the mixing and clarification than effect of rare earth extraction solution,thus case an important impact on the rare earth extraction efficiency.Have practical experience shows that rack design by the existing design method have deformation and serious vibration problem,so topology optimization design was to needed to research the rack,to achieve the goal of various aspects performance improvement about rack,this work will make an important influence about ensure the normal operation of the rare earth extraction production line.The main content of article:With 150 L of rare earth extraction production line rack and transmission mechanism as the research object to reseach the existing method about design process of rack and transmission mechanism,analyzes the existing problems of design method,Demonstrates the necessity of introduction the finite element optimization design.get the whole model of rack and transmission mechanism,preparing for the back of the finite element analysis.Make the stress and strain analysis of rack base on Hyper Works,get the contours of equivalent stress and equivalent strain,the results show that the maximum equivalent stress about rack is 245.9MPa,is greater than 156.7MPa about the allowable stress values of rack,and the equivalent strain contours show that largest equivalent deformation of rack is 32.41 mm,belongs to the large deformation.The largest equivalent stress and equivalent strain of rack is too large,topology optimization is needed to reduce the equivalent deformation and stress of rack.Rack is mainly affected by the static effect,the dynamic load is very small,and the motor is running relatively smoothly,but there have practical experience shows that rack have vibration problems,thus determine rack is possible without resonance problem.Use Hyper Works make research of first six modal analysis of the rack,get the first six natural frequency and vibration mode about the rack,through and rack vibration excitation source frequency comparison,found the second-order frequency of rack and motor frequency is very close,rack are at risk of resonance,so optimize of the natural frequency about the rack is needed.Make topology optimization about rare earth extraction rack with minimized flexibility as optimization objective function,with maximum stress rack material allowable stress 156.7 MPa and the volume fraction of 30% before and after optimization design space as constraint conditions,the maximum equivalent stress of rack reduced by 142.5 MPa after optimization,lessthan the allowable stress of material value of 156.7 MPa,the maximum deformation of rack deduced from 32.41 mm to 19.77 mm,within the scope of acceptable deformation of rack.After topology optimization design,the natural frequency of the rack has a certain improvement,but the effect is not obvious,thus further optimization design is the shape of the detailed design stage,and to further improve the natural frequencies of the rack.After the shape optimization design on the natural frequencies of the rack are improved further,effectively solved the problem of the resonance.Through optimum design research,the rack have get improvement in various aspects performance.