Optimization Design of Clamp Band Joint Considering Separation Characteristics
To solve the high robustness optimization design problem of the clamp band joint(CBJ),a lightweight design method of the CBJ is proposed,which takes into account the connection bearing characteristics and separation impact response.The optimization design is based on the 3D nonlinear finite element parametric model of the CBJ.The radial section size parameters of the connecting frame and the clamp block are taken as the design variables,the structural static bearing performance and the dynamic separation impact are taken as the constraints,and the lightweight is taken as the goal.To solve the difficulty of algorithm convergence caused by the high-dimension and irregularity of design space in optimization of the CBJ,a constrained sequence approximate optimization(CSAO)method is proposed based on approximate model and sequence sampling strategy.The results show that the algorithm can quickly converge to the optimal solution in the design domain under complex constraints,and the mass of the optimized structure is reduced by 5.62%compared with the initial design,while the structural connection stiffness is improved by 19.27%,and the separation impact of the satellite interface is reduced by 18.52%,which is a significant weight reduction under the condition of satisfying the performance constraints and verifies the effectiveness of the proposed method.The optimized configuration takes into account both the connection and separation characteristics,which has a certain engineering application value.
Clamp band jointLightweight designConnection stiffnessShock responseSequence approximate optimization method
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