Real-time prediction method and simulation system for wave force borne by motion load

Abstract

The invention provides a real-time prediction method and simulation system for wave force borne by a motion load. The method comprises: establishing a numerical wave pool and a solver; by utilizing the solver, solving the interaction between two-dimensional and three-dimensional floating bodies with different shapes and waves with different parameters, and calculating to obtain the motion attitude of the floating bodies along with the waves and the stress information at each moment; and training a neural network by using the calculated motion posture and stress information, and predicting the wave force borne by the floating body in a specific environment on line by using the trained neural network. A controller can be designed in the numerical wave pool, a controller interface is preset in the numerical pool, that is, a control equation can be added into a configuration file, in the simulation calculation process, control force is obtained through feedback information calculation and then applied to a controlled object, and object control is achieved to stabilize object movement. The numerical wave pool can conveniently simulate floating body movement conditions of different objects under different sea conditions, and has great flexibility and practicability.

Description

technical field [0001] The invention belongs to the technical field of real-time prediction of wave force, and in particular relates to a real-time prediction method and simulation system of a moving load subjected to wave force. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] In the case of harsh sea conditions, it is an extremely important issue in marine engineering to hoist cargo safely and smoothly into seawater for project construction. [0004] Since the deep-sea crane is fixed to a moving platform such as a ship, the ship will produce heave, roll and other motions under the influence of waves. When the hoisted load touches the seawater, the load will also be affected by the waves to produce a series of nonlinear and irregular movements, which may cause the load to collide with the hull, resulting in damage to the load or breakage ...

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Problems solved by technology

[0005] The inventor found in the research that the time lag phenomenon is a phenomenon that often occurs in actual engineering. The network transmission speed and the long sampling time of the sensor will cause the time lag phenomenon of data feedback. Therefore, no matter for the load on the hull or in the water, timely It is difficult to obtain their motion and force data, especially when the load is far away from the crane, and its force information cannot be fed back to the crane's control system in time

These factors will increase the difficulty of deep sea crane controller design

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