| Citation: | LIU Yu, ZHAO Diwen, AI Yanting, et al. Modification of static nonlinear model of thin layer element for aeroengine bolted structure[J]. Journal of Aerospace Power, 2023, 38（6）：1480-1488 doi: 10.13224/j.cnki.jasp.20220899
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A new nonlinear simulation method and model modification method were proposed for the nonlinear stiffness characteristics of bolted structures with notches in aeroengine casings. A nonlinear thin layer element method was proposed to simulate the nonlinear stiffness characteristics of bolted structures, and the simulation results were evaluated. A new dual weighted response surface correction method was also proposed. The modified method was used to modify the static nonlinear model of bolted structures. The results showed that the simplified nonlinear thin layer element model can predict the nonlinear stiffness characteristics of actual bolted structures considering the roughness of the seam contact surface; a dual weighted response surface correction method was proposed to maintain the stiffness error within 3.5% before and after correction, verifying the feasibility of the modeling and correction method.
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