CN-122021392-A - Double-ship back-wall motion simulation analysis method and system under random sea wave action

CN122021392ACN 122021392 ACN122021392 ACN 122021392ACN-122021392-A

Abstract

The invention discloses a simulation analysis method and a system for double ship back-side motions under the action of random sea waves, wherein the method comprises the steps of constructing a random ocean current digital model according to the relation between wave inclination angles and wave energy spectrums under different sea conditions; the method comprises the steps of establishing a ship double-platform motion simulation model according to platform motion parameters of a supplied ship and platform motion parameters of a task ship based on a random ocean current digital model, establishing an offshore double-acting platform side backing motion model based on the random ocean current digital model and the ship double-platform motion simulation model, and carrying out simulation analysis on double-ship side backing motion under the action of random ocean waves through the offshore double-acting platform side backing motion model. On the basis of the sea wave motion mathematical model and the ship platform motion model, the motion model of the double-acting offshore platform is established by analyzing the relative motion condition during the operation of the double-acting offshore platform, so that the double-ship side-leaning motion simulation under the random sea wave action is realized, and the safety analysis of the double-acting offshore platform side-leaning motion is further completed.

Inventors

XIAO JINSHI
LIU XIN
LI BIFENG
WU PENGFEI
YAN YI
YUE ZHEN
ZHANG CHONGHUI

Assignees

中国人民解放军海军工程大学

Dates

Publication Date: 20260512
Application Date: 20251223

Claims (10)

1. The double ship back side motion simulation analysis method under the random sea wave action is characterized by comprising the following steps of: Performing three-dimensional wave spectrum simulation according to wave simulation parameters under different sea conditions to obtain a relation between a wave inclination angle and a wave energy spectrum; constructing a random ocean current digital model according to the relation between the wave inclination angle and the wave energy spectrum; Based on the random ocean current digital model, constructing a ship double-platform motion simulation model according to the platform motion parameters of the replenishment ship and the platform motion parameters of the mission ship; Respectively setting observation points on the replenishment vessel and the mission vessel; based on the random ocean current digital model and the ship double-platform motion simulation model, constructing an offshore double-acting-platform back-side motion model according to coordinates of each observation point; And simulating and analyzing the double-ship back-up motion under the random sea wave action through the marine double-acting platform back-up motion model.
2. The method of claim 1, wherein the performing three-dimensional ocean wave spectrum simulation according to ocean wave simulation parameters under different ocean conditions comprises: P-M wave spectrum simulation is carried out on wave simulation parameters under different sea conditions; Constructing a three-dimensional wave spectrum function based on the simulated two-dimensional wave spectrum by a ITTC method; and carrying out three-dimensional wave spectrum simulation through the three-dimensional wave spectrum function.
3. The method of claim 1, wherein the random ocean current digital model is: In the formula, For the wave inclination angle, For the ith ocean wave circle frequency, The acceleration of the gravity force, For the wave energy spectrum corresponding to the ith wave circle frequency, The i-th wave phase difference, In order to be able to take time, Is the heave height of a single wave.
4. The method of claim 1, wherein the constructing a ship double-platform motion simulation model based on the random ocean current digital model according to the platform motion parameters of the replenishment ship and the platform motion parameters of the mission ship comprises: obtaining a motion simulation constraint condition of a platform; based on the random sea wave digital model, respectively constructing a ship platform rolling model and a ship platform pitching model according to the platform motion parameters of the supply ships and the platform motion parameters of the mission ships through the platform motion simulation constraint conditions; And building a ship double-platform motion simulation model according to the ship platform rolling model and the ship platform pitching model.
5. The method of claim 4, wherein the vessel platform roll model is: In the formula, For the roll angle of the platform, In the form of a frequency ratio, For the amplitude of the wave tilt angle, In order for the phase difference to be a phase difference, In order to damp the coefficient of attenuation, For the ith ocean wave circle frequency, Is time.
6. The method of claim 4, wherein the vessel platform pitch model is: In the formula, For the pitch angle of the platform, In the form of a frequency ratio, For the maximum amplitude of the pitch angle of the pitch direction wave, In order for the phase difference to be a phase difference, In order to damp the coefficient of attenuation, For the ith ocean wave circle frequency, Is time.
7. The method of claim 1, wherein the constructing an offshore double-acting platform upper motion model based on the random ocean current digital model and the ship double-platform motion simulation model according to coordinates of the observation point comprises: establishing a corresponding motion coordinate system according to the gravity centers of the replenishment vessel and the mission vessel respectively; Acquiring coordinates of each observation point according to the motion coordinate system; Based on the random ocean current digital model and the ship double-platform motion simulation model, respectively establishing a longitudinal relative displacement formula, a transverse relative displacement formula and a vertical relative displacement formula among all the observation points through a geometric pushing algorithm according to coordinates of all the observation points; and constructing an offshore double-acting platform back-side motion model according to the longitudinal relative displacement formula, the transverse relative displacement formula and the vertical relative displacement formula.
8. The method of claim 7, wherein the marine double-acting platform highwall motion model is: Wherein X r is the longitudinal relative displacement between the observation points, Y r is the transverse relative displacement between the observation points, Z r is the vertical relative displacement between the observation points, (X a ,y a ,z a ) is the coordinates of the observation points on the task platform, (X b ,y b ,z b ) is the coordinates of the observation points on the replenishment platform, In the form of a roll angle or a pitch angle, In order to supplement the roll angle of the platform, For the roll angle of the task platform, In order to supplement the pitch angle of the platform, The pitch angle of the task platform is defined, and S is the distance.
9. The method of claim 1, wherein the simulating analysis of the double vessel back motion under random sea wave action by the marine double-acting platform back motion model comprises: Respectively determining longitudinal and transverse shaking movement angles of the complementary ships and the mission ships under different sea conditions; Obtaining double-platform distance change information under different sea conditions through the marine double-acting-platform backup motion model according to the coordinates of the observation points on the replenishment ships, the coordinates of the observation points on the mission ships and the longitudinal and transverse shaking motion angles; Generating a direction distance change curve graph and a linear distance change curve graph according to the double-platform distance change information; and performing simulation analysis on the double-ship back side motion under the random sea wave action based on the direction distance change curve graph and the linear distance change curve graph.
10. A dual vessel back-up motion simulation analysis system under the action of random sea waves, the system comprising: the analysis module is used for carrying out three-dimensional wave spectrum simulation according to wave simulation parameters under different sea conditions to obtain the relation between the wave inclination angle and the wave energy spectrum; The construction module is used for constructing a random ocean current digital model according to the relation between the wave inclination angle and the wave energy spectrum; The building module is also used for building a ship double-platform motion simulation model according to the platform motion parameters of the replenishment ship and the platform motion parameters of the mission ship based on the random ocean current digital model; the setting module is used for setting observation points on the replenishment vessel and the mission vessel respectively; the construction module is also used for constructing an offshore double-acting-platform back-side motion model according to the coordinates of each observation point based on the random ocean current digital model and the ship double-platform motion simulation model; The analysis module is also used for carrying out simulation analysis on the double-ship back-up motion under the action of random sea waves through the marine double-acting platform back-up motion model.

Description

Double-ship back-wall motion simulation analysis method and system under random sea wave action Technical Field The invention relates to the technical field of ship back side motion simulation, in particular to a double ship back side motion simulation analysis method and system under the action of random sea waves. Background At present, a task ship is seriously dependent on dock replenishment, on one hand, frequent return to the dock replenishment not only can greatly prolong the task preparation time, but also can cause the ship to face a plurality of risks in the course of returning, such as severe sea conditions and the like, so that the task execution efficiency of the ship is seriously affected, and on the other hand, when the ship is executed in a far sea area far from a local soil base, a reliable offshore replenishment means is lacking, the task duration of the ship is greatly limited, and the requirements of the modern offshore task on quick response and long-time deployment of the ship are difficult to meet. In the prior art, although partial researches focus on the influence of sea waves on the movement of a single ship, systematic researches on the marine double-acting platform back-side supply scene are relatively few. In actual offshore replenishment operation, the actual offshore replenishment operation often depends on the experience and on-site judgment of a crew, lacks scientific and accurate decision basis, and is difficult to cope with complex and changeable sea conditions. Therefore, how to realize the simulation of the motion of the double ship back rests under the random sea wave action so as to complete the analysis of the safety of the motion of the back rests of the double-acting platform on the sea becomes a problem to be solved urgently. The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art. Disclosure of Invention The invention mainly aims to provide a double-ship back-up motion simulation analysis method and system under the action of random sea waves, and aims to solve the technical problem of how to realize double-ship back-up motion simulation under the action of random sea waves so as to finish the safety analysis of the back-up motion of an offshore double-acting platform. In order to achieve the above purpose, the invention provides a method for simulating and analyzing the motion of a double ship back support under the action of random sea waves, which comprises the following steps: Performing three-dimensional wave spectrum simulation according to wave simulation parameters under different sea conditions to obtain a relation between a wave inclination angle and a wave energy spectrum; constructing a random ocean current digital model according to the relation between the wave inclination angle and the wave energy spectrum; Based on the random ocean current digital model, constructing a ship double-platform motion simulation model according to the platform motion parameters of the replenishment ship and the platform motion parameters of the mission ship; Respectively setting observation points on the replenishment vessel and the mission vessel; based on the random ocean current digital model and the ship double-platform motion simulation model, constructing an offshore double-acting-platform back-side motion model according to coordinates of each observation point; And simulating and analyzing the double-ship back-up motion under the random sea wave action through the marine double-acting platform back-up motion model. Optionally, the three-dimensional sea wave spectrum simulation is performed according to sea wave simulation parameters under different sea conditions, including: P-M wave spectrum simulation is carried out on wave simulation parameters under different sea conditions; Constructing a three-dimensional wave spectrum function based on the simulated two-dimensional wave spectrum by a ITTC method; and carrying out three-dimensional wave spectrum simulation through the three-dimensional wave spectrum function. Optionally, the random ocean current digital model is: In the formula, For the wave inclination angle,For the ith ocean wave circle frequency,The acceleration of the gravity force,For the wave energy spectrum corresponding to the ith wave circle frequency,The i-th wave phase difference,In order to be able to take time,Is the heave height of a single wave. Optionally, the constructing a ship double-platform motion simulation model based on the random ocean current digital model according to the platform motion parameters of the replenishment ship and the platform motion parameters of the mission ship includes: obtaining a motion simulation constraint condition of a platform; based on the random sea wave digital model, respectively constructing a ship platform rolling model and a ship platform pitching m