Research On Analysis Method Of Deformation Characteristics Of Center Body Of Rubber Matrix Composite Particle Separator

Particle separator is the key component of helicopter engine intake system.In order to meet the different operating conditions and intake requirements of helicopter,researchers put forward the scheme of deformable particle separator.Rubber matrix composites have the characteristics of flexible deformation and elastic recovery,which can realize the flexible deformation of particle separator.At present,there are few reports on the deformation behavior of the centrosome of particle separator.In this paper,experimental and numerical simulation methods are used to study the deformation characteristics of the centrosome of particle separator,which has important theoretical significance and engineering practical value.The main research work and conclusions are as follows:(1)The rubber constitutive theory and the mechanical properties of cord/rubber composites were studied.The constitutive theory of rubber was studied.The material parameters of Neo-Hookean model,Mooney-Rivlin model and Yeoh model were fitted.The three constitutive model function curves were compared.It was found that the Mooney-Rivlin model function curves were close to the experimental results.Therefore,the Mooney-Rivlin model was chosen to analyze the mechanical properties of various cord/rubber composites.Methods The finite element model was established and the tensile test was carried out by using the model analysis method of reinforcing bars.The experimental results show that when the strain is less than 20%,the experimental results are in good agreement with the finite element simulation results,which verifies the rationality of the finite element model.(2)The deformation characteristics of the balloon bulge in the central body of the particle separator are analyzed.Based on the analysis method of reinforcing rib model and using ABAQUS,the finite element model of central airbag bulge is established.The simulation rules are analyzed from five aspects: uniform load,laying angle,cord type,cord spacing and backpack length.The simulation results show that the radial stiffness of the balloon bump decreases with the increase of the angle of the cord laying;the radial stiffness of the balloon bump increases with the increase of the elastic modulus of the cord;the radial stiffness of the balloon bump decreases with the increase of the cord spacing;and the radial stiffness of the balloon bump decreases with the change of the length of the anti-cladding.(3)The scheme design of the center body and the test of the analysis method of the deformation characteristics of the balloon bulge have been completed.The frame material of the center body is nylon cord,and the structural parameters of the center body are determined by using the deformation characteristics of the balloon bump,and the structural design and preparation scheme of the center body are given.Based on the analysis method of reinforcing rib model,the finite element model of the balloon of the center body is established.The deformation curve of the outer contour of the balloon bump is measured by schlieren system,and the schlieren test results are given.Compared with the results of finite element analysis,the test points are distributed around the simulation analysis curve,which verifies the accuracy of the deformation characteristics of the center body.