Lightweight Design Of Mortar Base Plate Structure

As a kind of close combat weapon,the maneuverability of mortar has been paid much attention,and the weight of the base plate of mortar accounted for a large proportion of the total mortar,so its lightweight design is particularly important.This subject combines ANSYS Workbench finite element analysis software to carry out structural optimization and material optimization design on the basis of strength and rigidity analysis of mortar base plate.Firstly,by establishing the finite element model of mortar base plate launching in medium-hard and compact soil,the rigidity and strength of mortar base plate under three typical working conditions are analyzed,and the equivalent stress nephogram,displacement nephogram and low-order natural frequency of mortar base plate are obtained,which provide a comparative basis for subsequent lightweight design.Secondly,the optimization variables are determined according to the optimization weight of each component of mortar base plate,and the preliminary structural optimization of mortar base plate is carried out.In order to narrow the range of variable optimization,a parameterized model of mortar base plate is established.With the allowable stress of mortar base plate as the constraint condition,the size optimization module is used to re-optimize the mortar base plate.The lightweight model of mortar base plate and its equivalent stress and displacement nephograms are obtained,and compared with the original mortar base plate.Finally,based on the simulation results of the former two models,titanium is established by using ACP module.Based on the strength failure criteria of two kinds of materials,the mortar base plate model of alloy-steel frame-composites main sheet is optimized by size optimization module.The lightweight mortar base plate model and its equivalent stress and displacement nephograms are obtained,and then compared with the original mortar base plate.The simulation results show that the original mortar base plate meets the strength requirement under three working conditions and has optimization margin.Its low-order natural frequency is far away from the excitation frequency and has good stiffness;the lightweight mortar base plate reduces 25.2% of the original weight on the basis of meeting the strength requirement,and the structure is more reasonable;on the basis of satisfying the strength requirement,the weight of the lightweight material base plate is 58.4% less than that of the original one,and the distribution of equivalent stress and the stability of the seat plate are good.The research results of this subject have certain theoretical value and reference significance for lightweight design of mortar base plate.