Simulation and tests for aeroelasticity of a fully moving rudder surface with bilinear nonlinearity

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (19) : 234-242.

LI Zhitao1,2,3, HAN Jinglong3, YUAN Haiwei3

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Abstract

Based on non-coupling of structure stiffness, a fully moving rudder surface with bilinear nonlinearity in torsional direction was designed, and numerical simulation and wind tunnel tests were done for it. Using contact pair to simulate bilinear nonlinearity, a numerical simulation model based on CFD/CSD coupling for this control surface was established considering initial contact stiffness, contact point chattering and contact friction force, etc. factors. The study results showed that change of initial contact stiffness has little effect on the limit cycle amplitude obtained using numerical simulation; using contact time control can effectively solve contact point chattering, and make the fluid-structure interaction simulation process be numerically stable;with increase in contact friction force, the limit cycle amplitude obtained using numerical simulation decreases;the varying law of the limit cycle amplitude obtained using numerical simulation with variation of dynamic pressure agrees well with that obtained using wind tunnel tests.

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aeroelasticity / wind tunnel test / bilinear nonlinearity / fluid-structure interaction

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LI Zhitao1,2,3, HAN Jinglong3, YUAN Haiwei3. Simulation and tests for aeroelasticity of a fully moving rudder surface with bilinear nonlinearity[J]. Journal of Vibration and Shock, 2020, 39(19): 234-242

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