We describe the space–time finite element techniques we developed for computation of fluid–structure interaction (FSI) problems. Among these techniques are the deforming-spatial-domain/stabilized space–time (DSD/SST) formulation and its special version, and the mesh update methods, including the solid-extension mesh moving technique (SEMMT). Also among these techniques are the block-iterative, quasi-direct and direct coupling methods for the solution of the fully discretized, coupled fluid and structural mechanics equations. We present some test computations for the mesh moving techniques described. We also present numerical examples where the fluid is governed by the Navier– Stokes equations of incompressible flows and the structure is governed by the membrane and cable equations. Overall, we demonstrate that the techniques we have developed have increased the scope and accuracy of the methods used in computation of FSI problems. � 2005 Elsevier B.V. All rights reserved.

Space-time finite element techniques for computation of fluid-structure interactions

Initial and progressive failure analyses for composite laminates using Puck failure criterion and damage-coupled finite element method

Peridynamic modeling of composite laminates under explosive loading

Utilizing fluid-structure interactions to improve energy efficiency of composite marine propellers in spatially varying wake

The structural response of a rectangular cantilevered flexible hydrofoil submitted to various flow regimes is analyzed through an original experiment carried out in a hydrodynamic tunnel at a Reynolds number of 0.75 × 10 6 . The experiment considers static and transient regimes. The latter consists of transient pitching motions at low and fast pitching velocities. The experiments are also performed for cavitating flow. The structural response is analyzed through the measurement of the free foil tip section displacement using a high speed video camera and surface velocity vibrations using a laser doppler vibrometer. In non cavitating flows, it is shown that the structural response is linked to the hydrodynamic loading, which is governed by viscous effects such as laminar to turbulent transition induced by Laminar Separation Bubble (LSB), and stall. It is also observed that the foil elastic displacement depends strongly on the pitching velocity. Large overshoots and hysteresis effect are observed as the pitching velocity increases. Cavitation induces a large increase of the vibration level due to hydrodynamic loading unsteadiness and change of modal response for specific frequencies. The experimental results presented in this paper will help to develop high fidelity fluid–structure interaction models in naval applications.

/pdf/an-experimental-analysis-of-fluid-structure-interaction-on-a-23m661qwyc.pdf

An experimental analysis of fluid structure interaction on a flexible hydrofoil in various flow regimes including cavitating flow

Free vibration of cantilevered composite plates in air and in water

In this paper, Taylor floating air-backed plate (ABP) model is extended to the case of a submerged water-backed plate (WBP) within the acoustic range The solution of the WBP is cast into the same format as that of the ABP with a modified fluid-structure interaction (FSI) parameter, which allows a unified analysis of the ABP and WBP using the same set of formulas The influence of back conditions on fluid and structural dynamics, including fluid cavitation, is systematically investigated Asymptotic limits are mathematically identified and physically interpolated Results show that the WBP experiences lower equivalent pressure loading, reduced structural response, and hence lower peak momentum gaining The time to reach peak momentum is shorter for the WBP than for the ABP Cavitation is found to be almost inevitable for the ABP, while relevant to the WBP only for a small range of the FSI parameter Implications to shock response of submerged structures are briefly discussed

Transient Response of Submerged Plates Subject to Underwater Shock Loading: An Analytical Perspective

Static divergence of self-twisting composite rotors

A technique provides for stimulating or otherwise treating multiple intervals/zones of a well by controlling flow of treatment fluid via a plurality of flow control devices. The flow control devices are provided with internal profiles and flow through passages. Mechanical darts are designed for engagement with the internal profiles of specific flow control devices, and each mechanical dart may be moved downhole for engagement with and activation of the specific flow control device associated with that mechanical dart.

Completion method for stimulation of multiple intervals

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