CN-122016272-A - Pool test method for simulating tension leg floating fan installation operation

CN122016272ACN 122016272 ACN122016272 ACN 122016272ACN-122016272-A

Abstract

The invention discloses a pool test method for simulating tension leg floating fan installation operation, which can be applied to basic design and detailed design stages of a floating fan. The invention provides a method for simulating the installation operation of a tension leg floating fan, which is characterized in that when the current tension leg floating fan installation operation simulation test method is generally limited in inaccurate adjustment, uncontrollable response, difficulty in reproducing an actual nonlinear installation process and the like and fails to consider time-varying effect and dynamic posture adjustment behavior in the tension applying process, a motor driving system is used for applying continuously adjustable tension to a tension leg installation cable, and the floating state of a platform is actively adjusted and continuously adjusted according to the posture change condition of a floating body in the installation process simulation, so that the operation process reproduction under multiple working conditions is realized, and the system is coupled with a load simulation and environment simulation device, and can comprehensively reflect the mechanical response and the operation behavior under complex boundary conditions in actual engineering.

Inventors

DENG SHI
CHEN FENG
WANG JIALE
LI SHUAI
ZHANG SHIYUAN
YANG XIAOLONG
ZHANG FAFU
LI JINGHUI
LIU XUPING
ZHANG GUANGLEI

Assignees

海洋石油工程股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260120

Claims (9)

1. A pool test method for simulating tension leg floating fan installation operation constructs a comprehensive test platform consisting of a tension leg platform, a model tower, a pneumatic load simulator, an electric loading device, a posture adjustment system and a mooring component, and is characterized by mainly comprising the following steps: S1, comprehensively considering geometric dimensions, time scales and mass distribution, determining a reduction ratio strictly according to Froude similarity, and ensuring that motion response frequency and vibration mode are kept consistent; S2, manufacturing a high-precision test model, and enabling the gravity center and the inertia radius of the model to be consistent with theoretical design values by adjusting a counterweight system in the platform model; s3, adjusting the wall thickness and the diameter of a tower model tube to enable the first-order natural frequency and the second-order natural frequency of the tower to be similar to the prototype, and installing a force sensor and an acceleration sensor on the tower top and the tower bottom; S4, the tension leg system adopts a high-strength steel wire rope, combines a multistage spring series structure to realize rigidity equivalence, and adopts a lead wire winding method to accurately simulate the wet weight of the tension leg; s5, connecting a single component sensor in series at the upper end of each tension leg, and sensing tension change and platform response in real time by combining a six-degree-of-freedom motion measurement system of the platform; S6, a set of tension leg floating fan installation simulation test platform based on electric loading and based on a platform posture active posture adjustment system is established, an independent servo motor is arranged at the joint of the platform and each tension leg, the winch is provided with two control modes of constant speed and constant length, and the winch can be flexibly switched to meet the requirements of different test stages and platform states to cover the whole process of tension loading, posture adjustment and dynamic response test.
2. The pool test method for simulating the installation operation of the tension leg floating fan according to claim 1, wherein in the step S6, the test platform realizes the tension and gesture double-dimensional data feedback through a non-contact six-degree-of-freedom motion monitoring system and a single-component sensor, a manual closed loop cooperative regulation mechanism consisting of four core steps of gesture judgment, strategy selection, action execution and result feedback is constructed, and the platform gesture change can be dynamically responded under the disturbance background of wind and wave flow, so that the continuous and stable gesture regulation capability is realized.
3. The pool test method for simulating the installation operation of the tension leg floating fan according to claim 1, wherein a high-precision programmable wave generator and a flow generating system are combined and controlled integrally, so that the multisource disturbance reproduction capability of a real environment is realized.
4. The pool test method for simulating the installation operation of the tension leg floating fan according to claim 1, wherein a set of multi-channel pneumatic load reproducer system is established at the top end of the tower cylinder model, and the system consists of six groups of high-rotation-speed controllable rotors and power control modules thereof, so that the combined application of loads in different space directions can be realized, and the stress state between the top of the tower cylinder and the floating body is ensured to be close to the actual working condition.
5. The pool test method for simulating the floating fan installation operation of the tension leg according to claim 1 is characterized in that the system acquires the motion information of the platform in real time through a non-contact six-degree-of-freedom motion monitoring system, simultaneously, a single component sensor on each tension leg synchronously records tension data, and a panoramic view of the current mechanical state of the platform is constructed.
6. The pool test method for simulating a tension leg floating fan installation operation according to claim 1, wherein the tightening steel wire performs a platform installation operation simulation, when the platform deviates from a target state in the tightening process, a cable to be adjusted is selected, and a constant speed mode or a constant length mode is selected for adjustment. After the adjustment is completed, the system acquires new tension and attitude data again, performs deviation judgment, and enters the next round of fine adjustment cycle if the target attitude state is not reached yet.
7. The pool test method for simulating a floating fan installation operation with tension legs according to claim 6, wherein the posture adjustment and the tension loading are not independently performed, but continuously run in a wind, wave and current disturbance environment, and the cooperative control is performed in a real-time coupling and dynamic mutual feedback mode. The attitude change of the platform interacts with the stress of the tension cable, and the system has dynamic adaptability under strong interference, so that the platform has stable, continuous and controllable attitude adjustment capability.
8. The pool test method for simulating the installation operation of the tension leg floating fan according to claim 1, wherein when the platform heave motion approaches the set gesture threshold, the tightening speed of all cable motors is reduced, and whether the platform realizes force balance and gesture horizontal stability in all directions is judged by combining tension distribution information fed back by a single component sensor on the tension leg.
9. The pool test method for simulating the installation operation of the tension leg floating wind turbine according to claim 1, wherein when both judging conditions are met, the platform can be considered to reach the set installation target state, the whole process of tension loading and posture adjustment is completed, and the complete simulation and verification of the installation operation of the tension leg floating wind power platform are realized.

Description

Pool test method for simulating tension leg floating fan installation operation Technical Field The invention belongs to the technical field of offshore oil engineering, and particularly relates to a pool test method for simulating tension leg floating fan installation operation. Background The tension leg floating fan balances the gravity and buoyancy of the floating body through the vertical mooring ropes which are highly pre-tensioned, so that the system still has good anti-overturning capability and excellent anti-shaking performance under the action of multi-source loads such as wind, waves, currents and the like. But the installation operation involves a plurality of complex links such as floating body water entry, initial mooring rope connection, pretension application, dynamic posture adjustment and the like, the coupling degree among all subsystems is high, the operation window is narrow, errors of any link can possibly cause the whole instability of the system, and great engineering risks exist. At present, systematic research on the installation stage of the tension leg floating fan is obviously lagged, the traditional model test lacks accurate simulation on the installation process, particularly the tension loading and posture changing process, so that the mechanical response and the operation window evaluation of the installation stage lack experimental support and methodology basis, the quasi-static analysis of different draft is adopted in the current installation process, and the dynamic response of a floating body in the installation process is ignored. In the related research, a few attempts are made to approximate the mooring tension by using a spring system or a counterweight adjusting mode, but the method has the limitations of inaccurate adjustment, uncontrollable response, difficulty in reproducing the actual nonlinear installation process and the like, and cannot consider the time-varying effect and the dynamic posture adjustment behavior in the tension applying process. Therefore, there is a need to design a pool test method that simulates the installation operation of a tension leg floating fan, solving the above-mentioned problems. Disclosure of Invention The invention aims to provide a pool test method for simulating tension leg floating fan installation operation, which has the advantages that a motor driving system is used for applying continuously adjustable tension to tension leg simulation, and the level of a platform is actively adjusted and continuously regulated according to the posture change condition of a floating body in installation process simulation, so that the operation process reproduction under multiple working conditions is realized, and the problem that the traditional model test in the background art lacks accurate simulation of the installation process, particularly the tension loading and posture change process is solved. In order to achieve the above purpose, the specific technical scheme of the pool test method for simulating the installation operation of the tension leg floating fan is as follows: A pool test method for simulating tension leg floating fan installation operation is provided, and a comprehensive test platform consisting of a tension leg platform, a model tower, a pneumatic load simulator, an electric loading device, an attitude adjusting system and a mooring component is constructed, and mainly comprises the following steps: S1, comprehensively considering geometric dimensions, time scales and mass distribution, determining a reduction ratio strictly according to Froude similarity, and ensuring that motion response frequency and vibration mode are kept consistent; S2, manufacturing a high-precision test model, and enabling the gravity center and the inertia radius of the model to be consistent with theoretical design values by adjusting a counterweight system in the platform model; s3, adjusting the wall thickness and the diameter of a tower model tube to enable the first-order natural frequency and the second-order natural frequency of the tower to be similar to the prototype, and installing a force sensor and an acceleration sensor on the tower top and the tower bottom; S4, the tension leg system adopts a high-strength steel wire rope, combines a multistage spring series structure to realize rigidity equivalence, and adopts a lead wire winding method to accurately simulate the wet weight of the tension leg; s5, connecting a single component sensor in series at the upper end of each tension leg, and sensing tension change and platform response in real time by combining a six-degree-of-freedom motion measurement system of the platform; S6, a set of tension leg floating fan installation simulation test platform based on electric loading and based on a platform posture active posture adjustment system is established, an independent servo motor is arranged at the joint of the platform and each tension leg, the winch is provided with two cont