Simulation Analysis Of The Performance Of Cabin Segment Separation Mechanism

The cabin segment separation mechanism is a device applied in the field of spacecraft,rocket or missile separation.In this paper,the UG three-dimensional drawing software was used to model the cabin separation mechanism.MATLAB simulation software was used to study the separation characteristics of the single chamber cabin separation mechanism and the dual chamber cabin separation mechanism.The structural strength of the two separation mechanisms was analyzed,and the shell thickness of the two separation mechanisms was optimized using response surface methodology and direct optimization methods.The main research contents are as follows:Firstly,the simulation calculation method was used to study the separation characteristics of the single-chamber cabin segment separation mechanism,and the secondary work correction coefficient in the working process of the separation mechanism was determined by the golden section method.The programming of MATLAB software was used to obtain the relationship between the separation speed,separation time of the piston rod of the single-chamber cabin segment separation mechanism and the initial volume of the grain chamber and other factors.The research results showed that: the piston rod separation speed was approximately linearly negatively correlated with the initial volume of grain chamber,and was approximately linearly positively correlated with the quality of grain;the separation time was non-linearly positively correlated with the initial volume of grain chamber,and was non-linearly negatively correlated with the quality of grain;the change of the thickness of grain had little effect on the separation characteristics of the single-chamber cabin segment separation mechanism.Secondly,the model of the double-chamber cabin segment separation mechanism was established,and the ballistic characteristics and separation characteristics of theseparation mechanism were studied.The results showed that the initial volume of low-pressure chamber,the quality of grain,and the thickness of the grain were the main factors that affected the separation characteristics of the double-chamber cabin segment separation mechanism.The change in the initial volume of the high-pressure chamber had little effect on the separation characteristics of the double-chamber cabin segment separation mechanism.The separation speed of the piston rod of the double-chamber cabin segment separation mechanism was non-linearly negatively correlated with the initial volume of the low-pressure chamber and the thickness of the charge,and was approximately linearly positively correlated with the quality of grain;the separation time was approximately linearly positively correlated with the initial volume of the low-pressure chamber,and was non-linearly negatively correlated with the quality of grain,and was non-linearly positively correlated with the thickness of grain.Thirdly,ANSYS finite element analysis software was used to analyze the strength of single-chamber cabin segment separation mechanism and double-chamber cabin segment separation mechanism,and optimized the shell thickness of the two separation mechanisms.The research results showed that: the maximum stress of the single-chamber cabin segment separation mechanism shell was 232.39 MPa and the maximum strain was 0.039;the maximum stress of the double-chamber cabin segment separation mechanism shell was 295.44 MPa and the maximum strain was 0.017.After the optimization of the shell of the single-chamber cabin segment separation mechanism,the total mass was reduced by 9.4%;after the optimization of the double-chamber cabin segment separation mechanism,the total mass was reduced by 6.12%.