| In order to further optimize the production process of the time fuze for a Type of weather modification projectiles,solve the problems in production,improve the production quality of the product,and determine that the time fuze of the time fuze for a Type of weather modification projectiles is the object of study.The factors affecting the burning time of the drug plate are analyzed by using combustion theory.Based on Matlab software and mathematical statistics,the relationship between static burning time and dynamic burning time is studied,and the empirical formula is derived.By means of ANSYS software,the parts which seriously affect production quality are simulated and analyzed.The factors influencing the burning time of the medicine plate were studied from three aspects:the pressure of the medicine plate,two-sided single-way charge structure of medicine plateand the burning condition of the medicine plate under rotation.The test results were analyzed by means of combustion theory:the pressure of the drug was about 194 MPa,the static combustion time of the drug plate was the highest,and the burning rate of the drug plate was stable.The double-sided single-way charge structure of the medicine plate is beneficial to the stable combustion of the tungsten delay agent;when the drug disk is subjected to a centrifugal speed of 18000 r/min,the drug disk with a pressure pressure of approximately 194 MPa has the highest combustion time accuracy and stability of combustion.In order to intuitively express the relationship between the static burning time and the dynamic burning time of the drug plate,the distribution rules of the static burning time and the dynamic burning time of the drug plate are studied by Matlab software.Both of them obey the normal distribution.The experimental data of the static and dynamic combustion time of the drug plate are grouped and the regression equations of the static and dynamic combustion time of the drug plate are deduced.The hypothesis of regression equation is tested by correlation coefficient test,and it is proved that the equation is available,that is,the static combustion time of the drug plate is linearly related to the dynamic combustion time.The assembly process of fuze is briefly described,the problems arising from the assembly of fuze are analyzed,and the ball holder in the explosive isolation component is determined as the research object.In ANSYS software,nonlinear static analysis method is used to simulate and analyze the damage and deformation of the sphere respectively.The simulation results are compared with the problems in production,and the results show that the preset tightening moment causes the surface of the ball to enter the plastic deformation state.Simplify the deformation of the spherical model and establish a finite element analysis model.The results of simulation are comprehensively analyzed:The preset tightening moment causes the simplified model to have varying degrees of elastic deformation.However,these deformation are not enough for the movable parts to be fixed,but there will be cases where the movable parts can not move flexibly,which will affect the reliability of the Fuze function. |
