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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference: Residual Stress, Fitness - for - Service and Manufacturing Processes; 20030720-20030724; Cleveland,OH; US >DAMPING EFFECT IN FLUID-STRUCTURE INTERACTION: APPLICATION TO SLAMMING PROBLEM
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DAMPING EFFECT IN FLUID-STRUCTURE INTERACTION: APPLICATION TO SLAMMING PROBLEM

机译：流体-结构相互作用的阻尼效应：在Slamming问题中的应用

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摘要

During a high velocity impact of a structure on an incompressible fluid, impulse loads with high pressure peaks occur. This physical phenomenon called 'slamming' is a concern in the shipbuilding industry because of the possibility of hull damage. Shipbuilding companies are carrying out several studies on the slamming modeling using FEM software. This paper presents the prediction of the local high pressure load on a wedge striking a tree surface. The fluid-structure interaction is simulated by a fluid-structure coupling algorithm. This method of coupling, which makes it possible to transmit the efforts in pressure from the Eulerian grid to the Lagrangian grid and vice versa, is a relatively recent algorithmic development It was successfully used in many scientific and industrial applications: the modeling of the bird strike on the fuselage of a Jet for the Boeing Corporation, underwater explosion shaking the oil platforms, and airbag simulation in automotive industry... Predicting the local pressure peak on the structure requires an accurate fluid-structure interaction algorithm. Thus, some penalty coupling enhancements make the slamming modeling possible. The main improvement is a numerical damping factor which permits to smoothing of the pressure signal.
机译：在结构对不可压缩流体的高​​速撞击过程中，会产生具有高压峰值的脉冲负载。由于船体损坏的可能性，这种被称为“撞击”的物理现象是造船业关注的问题。造船公司正在使用FEM软件对撞击模型进行多项研究。本文介绍了撞击树木表面的楔形上局部高压载荷的预测。通过流固耦合算法模拟流固耦合。这种耦合方法可以将压力的作用力从欧拉网格传递到拉格朗日网格，反之亦然，这是一种相对较新的算法开发方法，已成功用于许多科学和工业应用中：鸟击的建模在波音公司的一架喷气式飞机的机身上，水下爆炸震动了油平台，并在汽车工业中模拟了安全气囊。要预测结构上的局部压力峰值，就需要一种精确的流固耦合算法。因此，一些惩罚耦合的增强使撞击模型成为可能。主要的改进是数值阻尼因数，它可以使压力信号平滑。

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