Regular wave impact onto an elastic plate |
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Authors: | A A Korobkin T I Khabakhpasheva |
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Affiliation: | (1) Lavrentyev Institute of Hydrodynamics, Novosibirsk, 630090, Russia |
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Abstract: | A computational analysis of an elastic plate dropped against regular long waves is presented. The problem is considered within
the linear potential-flow theory. The liquid flow is two-dimensional and the plate is modelled by an Euler beam. The analysis
is based on the normal-mode method with hydroelastic behavior of the plate being of main interest. Different impact conditions
are considered to study the dependence of the total energy of the plate–liquid system on impact geometry and plate properties.
The contributions of kinetic and potential energies to the total energy are analyzed. It is shown that the kinetic part of
the system energy is small at the instant of time when bending stresses in the beam approach their maximum values. Estimations
of both the total energy and the maximum of bending stresses are presented. Most of the calculations are performed for the
conditions of experiments carried out in MARINTEK. A range of the problem parameters is also considered, to reveal peculiarities
of the unsteady interaction between a falling elastic plate and surface waves. |
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Keywords: | energy-conservation law hydroelasticity maximal bending stresses normal-mode method water impact |
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