離散はり要素を用いたすきま流れによって発生するシートのフラッタ解析(機械力学,計測,自動制御)
離散はり要素を用いたすきま流れによって発生するシートのフラッタ解析(機械力学,計測,自動制御)
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使用离散梁单元对缝隙流引起的板材颤振进行分析（机械动力学、测量、自动控制）
DOI：
10.1299/kikaic.68.3314
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
小山 呉
中科院分区：
文献类型：
--
作者：
成彦 金子;小山 呉
本文研究了狭窄通道中流固耦合引起的板片颤振。片材被认为是无质量梁单元、弹簧和离散质量粒子的组合，其中每个粒子的质量和弹簧系数是根据梁模型计算的。通过计算作用在围绕其平衡点振动的每个元件上的流体动力和摩擦力，获得系统的运动方程。线性化运动方程产生特征值分析。特别是，我们将入口处的脉动流量视为一个新变量，以消除对特征方程系数的频率依赖性。因此，该方法无需迭代，可直接由特征函数求得特征值。然后，将计算结果与先前报道的实验结果进行比较，验证了所提方法的有效性。
In this paper, sheet flutter in a narrow passage caused by fluid-structure interaction is studied. The sheet is considered as a combination of mass less beam elements, springs and discrete mass particles, in which the mass of each particle and spring coefficient are calculated based on the beam model. Equation of motion of the system is obtained by the calculation of fluid-dynamic and frictional forces acting on each element vibrating around its equilibrium point. The linearized equation of motion results in an eigenvalue analysis. In particular, we consider the fluctuating flow rate at the inlet as a new variable to eliminate frequency dependency on the coefficients of the characteristic equation. Therefore, the eigenvalue can be obtained directly from characteristic function without iteration by this method. Then, calculated results were compared with previously reported experimental results and the validity of the proposed method is verified.