The Numerical Simulation And Optimization Design Of Aerospace String Pyrotechnically Actuated Separation Device

Pyrotechnically actuated separation devices are the master parts of aerospace vehicle to complete the task of separation. These devices are related to the success of aerospace mission, as well as the safety of personnel and equipments. For the researches of aerospace string pyrotechnically actuated separation devices, traditional development approach bases on design-test-modification, which requires repeatedly testing and modifying design, and results in increasing project cost and development period.The aerospace string pyrotechnically actuated separation devices have been researched systematically with the numerical simulation technique and structural optimization method. The main contents are included as follows:(1) The two-dimension models and three-dimension models with parameterization program are adopted to simulate the exploding separation behavior and parametric analysis of the aerospace string pyrotechnically actuated separation devices based on finite element software. The response characteristic is described during exploding separation of the device, and the exploding impulse response of separation device was found under different structural parameters.(2) With the tress constraint, the minimum mass of explosive to separate the device is regarded as the objective. An optimization model is created by Response Surface Method, which has been adopted to optimize the loading groove structure of aerospace string pyrotechnically actuated separation device.(3) With the stress constraint before exploding, the structure is separated most easily as the objective. An optimization model is created by the same method as (2), which has been used for optimization about the weakening groove structural parameters of skin in aerospace string pyrotechnically actuated separation device.In summary, the numerical simulation technique and structural optimization method have successfully adopted to research on pyrotechnically actuated separation devices this dissertation. The numerical models and optimization models are established, and can be directly applied to engineering, which is instructional significance to the design and test of engineering.