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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30 Sep 2012
TL;DR: In this paper, the authors describe solutions for heaving, surging, pitch-bridging, and wave-following in a wave energy converter with variable angle fins, locking and unlocking segments of the floating body or using gravity as the restoring force.
Abstract: Wave energy converter efficiency is improved by dynamic tuning over periods from 5 to 15 seconds. Tuning methods are: for heaving, mass is varied by locking and unlocking neutrally buoyant masses or by trapping and releasing seawater; for surging, water-plane area is varied by force; for rotational variants of heaving and surging and for pitching, the radius of gyration is varied. Fixed mass is reduced by using materials and structures with high ratios of strength to weight. Fixed added mass is reduced by streamlining, by constant radius body profiles and by keeping moving structures out of the water. Added mass is varied continuously by using variable angle fins: effectiveness is enhanced by enclosure. In pitching, wave-bridging is addressed by limiting length, using locking and unlocking segments of the floating body or by using gravity as the restoring force. Solutions are described for heaving, surging, pitching and wave-following.
13 citations
TL;DR: In this article, a numerical simulation using the CFD-ACE+ commercial software, which employs a finite volume method for the discretization of the Navier-Stokes equations (NSE), is combined with a finite perturbation method applied to the equivalent journal of the damper.
13 citations
TL;DR: In this paper, a new theoretical approach based on an Helmholtz expansion and a bipolar coordinate system is presented to estimate the fluid forces acting on the two bodies, through viscous fluid added coefficients.
13 citations
TL;DR: The propagation of surface acoustic Love modes along ZnO/glass-based structures was modeled and analysed with the goal of designing a sensor able to detect changes in the environmental parameters, such as liquid viscosity changes and minute amounts of mass supported in the viscous liquid medium.
13 citations
TL;DR: In this article, the authors apply the theory of nonlinear normal modes to investigate the nonlinear vibrations of a discrete two-degree-of-freedom conceptual model of an offshore compliant articulated tower.
13 citations