Topic
Added mass
About: Added mass is a research topic. Over the lifetime, 2849 publications have been published within this topic receiving 47899 citations.
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TL;DR: In this paper, an energy finite element analysis (EFEA) formulation for computing the high frequency behavior of plate structures in contact with a dense fluid is presented, where heavy fluid loading effect is incorporated in the derivation of the EFEA governing differential equations and in the computation of the power transfer coefficients between plate members.
61 citations
TL;DR: In this article, the authors considered infinite and periodic arrays of porous disks in oscillatory flow perpendicular to their planes, and derived added mass and damping coefficients, as functions of the relative spacings between the disks, and of the parameter (A/a)(1−τ)/(2 μτ2), where A is the flow motion amplitude, a the disks radii, τ the porosity, or open-area ratio, andμ a discharge coefficient, close to 0.5.
61 citations
TL;DR: A robust control scheme using a multilayer neural network with the error backpropagation learning algorithm to control a robot manipulator operating under the sea which has large uncertainties such as the buoyancy, the drag force, wave effects, currents, and the added mass/moment of inertia.
Abstract: Presents a robust control scheme using a multilayer neural network with the error backpropagation learning algorithm. The multilayer neural network acts as a compensator of the conventional sliding mode controller to improve the control performance when initial assumptions of uncertainty bounds of system parameters are not valid. The proposed controller is applied to control a robot manipulator operating under the sea which has large uncertainties such as the buoyancy, the drag force, wave effects, currents, and the added mass/moment of inertia. Computer simulation results show that the proposed control scheme gives an effective path way to cope with those unexpected large uncertainties.
61 citations
TL;DR: In this article, a simplified procedure is developed to evaluate the added hydrodynamic mass for towers of arbitrary cross section, having two axes of symmetry and dimensions varying along the height, and demonstrated that the added mass associated with surrounding (outside) water or inside water can be determined to a useful degree of accuracy without rigorous three-dimensional analysis of the two fluid domains.
Abstract: For the preliminary phase of design or safety evaluation of intake‐outlet towers, the hydrodynamic interaction effects can be most simply represented in earthquake response analysis by added hydrodynamic mass distributed over the height of the tower. A simplified procedure is developed to evaluate the added hydrodynamic mass for towers of arbitrary cross section, having two axes of symmetry and dimensions varying along the height. It is demonstrated that the added mass associated with surrounding (outside) water or inside water can be determined to a useful degree of accuracy without rigorous three‐dimensional analysis of the two fluid domains. Standard data are presented for convenient implementation of the simplified procedures developed in this paper.
61 citations
TL;DR: The lattice Boltzmann method with the Bhatnagar–Gross–Krook linear collision operator is used to study the flow physics induced by a rigid lamina undergoing moderately large harmonic oscillations in a viscous fluid to compute the complex hydrodynamic function that describes the added mass and hydrod dynamic damping experienced by the lamina.
Abstract: In this paper, we use the lattice Boltzmann method with the Bhatnagar–Gross–Krook linear collision operator to study the flow physics induced by a rigid lamina undergoing moderately large harmonic oscillations in a viscous fluid. We propose a refill procedure for the hydrodynamic quantities in the lattice sites that are in the vicinity of the oscillating lamina. The numerically estimated flow field is used to compute the complex hydrodynamic function that describes the added mass and hydrodynamic damping experienced by the lamina. Results of the numerical simulations are validated against theoretical predictions for small amplitude vibrations and experimental and numerical findings for moderately large oscillations.
61 citations