Investigation of end-stop motion constraint for a wave energy converter

Abstract

This work develops a design protocol for wave energy converter motion constraint, endstop systems. It applies the protocol by first using a numerical hydrodynamic wave energy converter (WEC) model to obtain preliminary design loads. Following a definitive set of selection criteria, comprehensive design of a system of load-bearing, helical springs is produced. A preliminary design is modeled with finite element analysis, and compared to analytical results. New dynamical collision models are conceived for impact damping systems based on spring-mass and anisotropic surface friction phenomena, by applying the concept observed on the snake ventral skin. Friction and compressive forces are correlated by classical mechanics. Finally, dimensional analysis is applied to yield design parameterization to directly compare the micro and macro influences within these distinct models, resulting in new knowledge on the physical relationships within contact interfaces and a dimensionless mechanical impedance formulation