Structural Design And Optimization Simulation Of A Small Cuboid Flat Constant Volume Combustion Bomb

It is difficult to study all the boundary conditions directly in the combustion chamber environment of the internal combustion engine.Generally,combustion simulation devices are used to study the combustion process of internal combustion engines.This paper designs and optimizes a small constant volume burner for premixed gas combustion.The rectangular window is used to observe the entire combustion process after the spark plug is ignited.Based on the existing literature of equal volume incendiary bombs,combined with the research needs of this paper,a small flat equal volume incendiary bomb of 20mm×20mm×100mm cuboid is proposed.Ignition device,intake and exhaust device,pressure sensor,temperature sensor are specially designed.The 3D modeling software was used to model the fixed-volume incendiary bomb model and check the structural interference,which laid the foundation for finite element analysis and structural optimization.Use the finite element method to carry out structural mechanical analysis on the model parts,and judge the strength of the analysis results based on the strength theory.According to the simulation results of equivalent stress,total displacement and safety factor,the optimal parameters of each part can be determined in turn.The response surface analysis of the part model determines the optimizable space of each part parameter,and the individual parts meet the safety requirements after optimization.Finally,according to the finite element analysis of the fixed-volume incendiary bomb assembly,the safety factor of the optimized steel material structure is above 5 and the safety factor of the copper flexible gasket is about 1.4;the total displacement of the overall structure is reduced from 0.020102 to 0.018587,and the deformation of the upper and lower walls of the combustion chamber is concentrated Partial reduction;the overall mass was reduced from 18.03272 kg to 11.9751 kg,a reduction of 33.6%.