Evaluating Flutter Derivatives of the Thin Plate by Applying the Numerical Simulation Method
Evaluating Flutter Derivatives of the Thin Plate by Applying the Numerical Simulation Method
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发表时间：
2005
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通讯作者：
Chen Zheng-qing
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作者：
Chen Zheng-qing
建立了基于计算流体力学（CFD）的流线型截面颤振导数数值模拟模型。该数值模型基于粘性不可压缩Navier-Stokes方程和有限体积法，旨在求解受规定振动的截面周围的流场，得到气动力级数，最终目的是提取截面的颤振导数。将该模型应用于薄板，并对其颤振导数进行了计算。将所得结果与风洞试验结果和理想平板的Theodorsen解析解进行了比较，结果吻合较好，验证了所提数值方法的有效性。该数值模型可用于识别桥梁截面的颤振导数。
A numerical simulation model based on Computational Fluid Dynamics(CFD) was presented to evaluate the flutter derivatives of streamlined section. This numerical model, derived from viscid incompressible Navier-Stokes equations and finite volume method, aimed to solve the flow field around section undergoing prescribed vibration, and obtained aerodynamic forces series, with the ultimate objective to extract the flutter derivatives of the section. The proposed model was applied to the thin plate, and its flutter derivatives were assessed . The results were compared with those obtained in wind tunnel tests and Theodorsen analytic solutions of the ideal flat plate, and better agreements were found, which confirmed the effectiveness of the proposed numerical method. This numerical model can be applied to identify the flutter derivatives of bridge sections.