A method and system for measuring hydrodynamic response of a floating body under wave action

Abstract

The invention discloses a method and system for measuring the hydrodynamic response of a floating body under the wave action. The method comprises the following steps of establishing a floating body geometric model and determining a calculation domain; meshing the boundary and storing the node information of the mesh; establishing boundary integral equation and rigid body motion equation; solvingthe boundary integral equation and rigid body motion equation at the initial time, and obtaining the velocity potentials of each node on the solid boundary at the initial time, the velocity potentialderivatives of each node on the free surface boundary, the wave forces on the floating body and the displacement, velocity and acceleration of the floating body motion; according to the parameters ofeach node at the initial time, calculating the velocity potential of each node on the solid boundary at the next time, the velocity potential derivative of each node on the free surface boundary, thewave force on the floating body and the displacement, velocity and acceleration of the floating body motion. The present invention solves the problem of insufficient consideration of nonlinearity in the process of interaction between wave and structure in the prior art, and improves the calculation accuracy.

Description

technical field [0001] The invention belongs to the technical field of marine hydrodynamics, in particular to a method and system for measuring the hydrodynamic response of a floating body under the action of waves. Background technique [0002] For the development of deep-sea oil and gas resources, it is very important to design and construct marine structures safely, rationally and economically. Accurate prediction of environmental loads, especially wave loads, is the first prerequisite to ensure safe design and reliable operation of marine structures. In the 28 years from 1954 to 1982, 36 oil drilling platforms in the world capsized due to the attack of strong winds and waves. The shipwrecks caused by strong winds and waves still account for more than 60% of the world's total number of shipwrecks on the ocean. The actual ocean environment is very complex and harsh. With the development of ocean development, the ocean working environment is getting worse and worse, and th...

AI Technical Summary

Problems solved by technology

Traditional analysis methods are based on the assumption that the wave nonlinearity is small, which will inevitably lead to calculation failure or insufficient calculation accuracy

Using the perturbation expansion method to approximate the waves into linear, second-order or even third-order methods, the calculated wave loads can no longer meet the accuracy requirements of today's coastal engineering and ocean engineering fields.

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