内嵌黏性流体欧拉梁的自适应减振模式研究

Adaptive Vibration Suppression Mode for Euler Beam with Interior Inlay Viscous Fluid

基于内嵌式黏性流体单元自适应减振方法(IVFUM),研究了一种新的内嵌式黏性流体单元(IVFU)减振模式.在简谐定频激励下,通过构建流体活动边界条件,将流固耦合模型近似简化为充液腔的纯流体动力学问题,并应用CFD软件FLUENT对内嵌流体欧拉梁在主振动下腔内流体的流动进行了数值模拟,结果表明:两种IVFU在一、二阶主振动下的自由表面形状、速度、相对压强及压力分布等流动性态对欧拉梁减振具有自适应和有效性;梁内流道水平比流道倾斜更具有减振的工程应用价值.

Based on the interior inlay viscous fluid unit method（IVFUM）, the method of adaptive vibration suppression, a new vibration suppression pattern of interior inlay viscous fluid unit（IVFU）, is investigated. Under the sinusoidal excitation with fixed frequency, the liquid-solid coupling model is approximately simplified into a total hydrokinetics one in a fluid filled cavity by constructing fluid dynamic boundary conditions （FDBC）, and the numerical simulation of interior fluid field in the inclined cavity of Euler beam under principal vibration is carried out with CFD software FLUENT. The shape of fluid free surface, velocity, relative pressure and press field of two kinds of IVFU under first-order and second-order principal vibration show the availability and adaptability of vibration suppression on the Euler beam. The horizontal fluid path in the beam remarkably facilitates suppressing vibration compared with the inclined one.