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| Simulation and tests for aeroelasticity of a fully moving rudder surface with bilinear nonlinearity |
| LI Zhitao1,2,3, HAN Jinglong3, YUAN Haiwei3 |
1. No.713 Research Institute, China Shipbuilding Industry Corporation, Zhengzhou 450015, China;
2. Henan Provincial Key Lab of Underwater Intelligence Equipment, Zhengzhou 450015, China;
3. State Key Lab for Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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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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Received: 28 April 2019
Published: 28 September 2020
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