Ship wind wave load and dynamic response analysis method and system under short peak wave sea condition

By establishing a short peak wave wind and wave model and a multi-wave superimposed wave pressure model, the problem of inaccurate ship dynamic response prediction under complex sea conditions is solved, and more accurate wind and wave load and dynamic response analysis is achieved, which improves the evaluation accuracy of take-off and landing safety of carrier-based helicopters.

CN119647332AActive Publication Date: 2025-03-18BEIHANG UNIV
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Patent Information

Application Number
CN202411742089.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-29
Publication Date
2025-03-18
Estimated Expiration
2044-11-29

AI Technical Summary

Technical Problem

The prior art is difficult to accurately predict ship dynamic response and its impact on ship-based helicopter takeoff and landing under complex sea conditions, and the calculation results are not accurate enough to fully consider the impact of wind and waves on ships.

Method used

By establishing a short peak wave wind and wave model, based on the characteristic parameters of the wind and wave and the motion state parameters of the ship, a specific calculation method and coordinate conversion method are used to obtain the wave surface equation and multi-wave superimposed wave pressure model, and then the interference force and interference torque are calculated.

Benefits of technology

It achieves more accurately predicting the dynamic response of ships in wind and waves, and more accurately assessing the take-off and landing safety of carrier-based helicopters under high sea conditions, improving calculation accuracy.

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Abstract

The invention provides a ship storm load and dynamic response analysis method and system under a short-peak wave sea condition, and the method comprises the steps: building a long-peak wave model based on storm characteristic parameters under different sea conditions and motion state parameters of a ship, and carrying out the calculation under ground coordinates to obtain a first wave surface equation; a first wave surface equation located in a ground coordinate system is converted into a ship body stable coordinate system through a coordinate and frequency conversion method, a second wave surface equation suitable for the surrounding environment of the ship is obtained, then a fluctuation pressure model caused by sea waves is established, the fluctuation pressure model is corrected through an exponential decay method, and the ship body stable coordinate system is obtained. A multi-wave superposition fluctuation pressure model is obtained through a coordinate and frequency conversion method and a harmonic superposition analysis method; finally, the disturbance force and the disturbance torque are calculated through a specific calculation method, the dynamic response of a ship in stormy waves can be predicted more accurately, the take-off and landing safety of a ship-borne helicopter under the high sea condition can be evaluated more accurately, and the calculation precision is effectively improved.
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