Optimal Design of Loading Program for Static Strength Test of Wing Wind Tunnel Model Based on NSGA-Ⅱ Algorithm
This paper proposes an optimal design method of test loading program based on NSGA-Ⅱ algorithm for the static strength test of wing wind tunnel model,which includes the design of loading layout and multi-objective optimization design of test load.The setting of the constrained sections is introduced in the design of the loading layout,and on whose basis,a multi-objective optimal design model for the test load is established,taking shear force,bending moment and torque errors within the constrained sections as the optimization objectives and the static equivalence principle and the minimum error requirement as the constraints.The multi-objective optimization model is solved based on the NSGA-Ⅱ algorithm by taking the CHN-T1 standard model as an example,and with the algorithm using the feasibility law deals with the constraints to solve the optimal test load program finally and conduct the finite element simulation of the program for verification.The results show that the errors of the maximum equivalent stress,strain value and deformation of the test program and the ideal test under fluid-structure coupling are less than 6%,and the optimized loading program well simulates aerodynamic load.
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