12 results about "Tension-leg platform" patented technology

The invention discloses a low-friction implementation method for simulating the dynamic installation process of a tension leg platform, and the method comprises the steps: connecting a floating platform, a tower cylinder and a floating cylinder to form a platform main body structure, and arranging a deck lifting point at one side, facing the floating cylinder, of the floating platform, the deck lifting point is connected with a steel wire rope; the anchoring device is used for leading out one end of the steel wire rope away from the deck lifting point through a fairlead arranged on the buoy and fixing to the bottom of the pool; the cable guide hole is provided with a circular ring guide piece, and the steel wire rope penetrates through the circular ring guide piece so as to avoid clamping stagnation or sudden sliding of the steel wire rope in the dynamic loading process. According to the low-friction implementation method for simulating the dynamic installation process of the tension leg platform, the guide function of the steel wire rope and the structure of the floating body of the platform are functionally decoupled through the design of the ring guide piece with the separated structure, path adjustment, configuration change and parameter iteration can be conveniently carried out in the test process, and it is guaranteed that the steel wire rope is evenly stressed in the sliding process.

The utility model belongs to the field of offshore wind power, and discloses a tension leg platform system with a tendon balancing device, which comprises a tension leg platform, a plurality of tendons are annularly distributed on the periphery of the lower end of the tension leg platform, and the lower ends of the tendons are connected with a suction cylinder, and is characterized in that the tension leg platform is connected with the tendons through the tendon balancing device; the tendon balancing device comprises a telescopic assembly and a driving assembly, the telescopic assembly comprises a telescopic fixed part and a telescopic movable part which are in telescopic sliding fit, the telescopic fixed part is connected with the tension leg platform, the telescopic movable part is connected with the tendon, and the driving assembly drives the telescopic movable part to stretch out and draw back relative to the telescopic fixed part. According to the tension leg platform, the stress of the tendons is dynamically adjusted through the tendon balancing device, the stress state of the platform is adjusted in real time, and the problem of inclination and vibration caused by environmental factors such as wind waves and flow is solved.

This invention discloses a modular offshore wind turbine tension leg foundation structure and its construction method, aiming to provide a modular offshore wind turbine tension leg foundation structure and its construction method that can effectively reduce the cost of offshore wind power projects and the installation risk of tension leg foundation structures, while effectively shortening the construction time. A modular offshore wind turbine tension leg foundation structure includes: a platform body, including a central column and several buoys evenly distributed around the central column, the central column and each buoy being connected as a whole by a support; a suction cylinder foundation module, including several suction cylinders, each suction cylinder being connected as a whole by a connecting beam; a tension leg mooring module, including several mooring devices, each mooring device including a mooring cable and a mooring cable deployment and retrieval device located on the platform body, the lower end of the mooring cable being connected to the suction cylinder foundation module; the mooring cable deployment and retrieval device can release the mooring cable, allowing the suction cylinder foundation module to separate from the platform body and be lowered to the seabed.

The invention discloses a tension leg platform tension tendon real-time tension measuring device which comprises a rocker arm, a first shackle and a second shackle, the first shackle and the second shackle are connected to the two ends of the rocker arm respectively, the first shackle is connected to a platform, the second shackle is connected to a tension tendon, and the first shackle and the second shackle are connected to the rocker arm. The rocker arm is arranged between the platform and the tension tendon; the rocker arm is connected with a first fixing block and a second fixing block, a tension adjusting arm is connected between the first fixing block and the second fixing block through a connecting rod, and the tension adjusting arm is connected with an optical fiber force transducer, so that when the rocker arm slightly deforms, the tension adjusting arm deforms synchronously, and the optical fiber force transducer outputs a signal through a cable. Therefore, the tension value of the tension tendon is obtained. The real-time tension measuring device for the tension tendon of the tension leg platform is provided with two sets of measuring systems for respective measurement and mutual verification, and meanwhile, the real-time tension measuring device is simple in structure and convenient to operate, maintain and replace.

This invention provides a gravity-based multi-tension-leg floating wind turbine platform, comprising: a wind turbine and its tower, a buoyancy chamber, a tensioning mooring system, and a gravity foundation. The wind turbine and its tower are mounted on top of the buoyancy chamber; the buoyancy chamber is connected to the gravity foundation arranged on the seabed via the tensioning mooring system to form a tension leg restraint system. The tensioning mooring system, by significantly increasing the number and rationally distributing the cables, distributes the platform's tension under the influence of wind, waves, and currents among more tensioning components, thereby reducing the tensile force and fatigue load requirements of a single tensioning mooring member and its end connecting components, and reducing the engineering implementation difficulty caused by excessive stress on the tension legs. The gravity foundation is fixed to the seabed by its own weight, eliminating the need for piling operations required for traditional tension-leg platforms, significantly reducing the difficulty and cost of offshore construction.

The utility model discloses a tension leg type wind wave coupling power generation foundation which comprises a stand column used for installing a wind turbine generator and a fan tower drum, the stand column is fixed to a frame, a buoy is fixed to the bottom of the frame and is moored through tension tendons, the tension leg type wind wave coupling power generation foundation comprises an oscillating floater, and a pulling rope is arranged on the buoy to pull the oscillating floater. A winch, a generator, a storage battery and a motor are arranged in the buoy, the lower end of the traction rope is wound around the winch, the generator and the motor are in transmission connection with the winch, and the storage battery is electrically connected with the generator and the motor. The problem that an offshore power generation platform adopting a floating structure to capture wave energy transmits an overhigh load to the power generation platform under an extreme sea condition to affect safety is solved.

The invention is directed to a reusable tension element for a tendon for tension leg platforms, said tension element comprising a lamella comprising two terminal ends and having an essentially rectangular cross-section with an aspect ratio that is defined as the ratio between the longest side and the shortest side of the rectangle of at least 10, preferably at least 15, wherein said lamella has thickness of at least 1 mm, and a length of at least 20 m, wherein said lamella comprises a material having an elastic modulus of more than 50 GPa. Further aspects of the invention are a tendon comprising said elements, a transportation system to transport said elements, and a tension leg platform that is tethered to a seabed with said tendons.

Systems, devices and methods enable generation and monitoring of support platform structural conditions in a manner that overcomes drawbacks associated with conventional approaches (e.g., load cells) for generating and monitoring similar operating condition information. In preferred embodiments, such systems, devices and methods utilize fiber optic strain gauges (i.e., fiber optic sensors) in place of (e.g., retrofit / data replacement) or in combination with conventional load cells. The fiber optic sensors are strategically placed at a plurality of locations on one or more support bodies of a support platform. In preferred embodiments, the fiber optic strain gauges are placed in positions within a hull and / or one or more pontoons of an offshore platform. Such positions are selected whereby resulting operating condition data generated by the fiber optic strain gauges suitably replaces data received by conventionally constructed and located load cells of an offshore platform (e.g., a TLP).

The application relates to the technical field of offshore wind power generation, in particular to a buoyancy adjusting system and method suitable for a tension leg platform. The system comprises a tension leg platform and a plurality of buoyancy adjusting components. The buoyancy adjusting component comprises a rigid outer wall, a flexible inner wall, a plurality of bionic contraction units, a flow guide unit, a central control unit and an inclination measuring unit. The flexible inner wall is nested on the inner side of the rigid outer wall, and a water cabin is formed inside. The inclination measuring unit is used for detecting the inclination angle of the water cabin corresponding direction. The plurality of bionic contraction units are arranged inside the water cabin and are used for being contracted or expanded under the control of the central control unit. The central control unit is used for controlling the water filling state or the water discharging state of the flow guide unit and the contraction state or the expansion state of the bionic contraction unit according to the inclination angle. The above technical scheme can improve the response speed and the adjusting precision of the tension leg platform buoyancy adjustment.

The invention discloses a pool test method for simulating the installation operation of a tension leg floating fan. The pool test method for simulating the installation operation of the tension leg floating fan can be applied to the basic design stage and the detailed design stage of the floating fan. A current tension leg floating fan installation operation simulation test method generally has the limitations of inaccurate adjustment, uncontrollable response, difficulty in reproducing an actual nonlinear installation process and the like, and when a time-varying effect and a dynamic posture adjusting behavior in a tension applying process are not considered, the time-varying effect is not accurate, and the dynamic posture adjusting behavior is not accurate. Continuous and adjustable tension is applied to the tension leg mounting cable through the motor driving system, the floating state of the platform is actively adjusted and continuously adjusted according to the posture change condition of the floating body in the mounting process simulation, the operation process reproduction under multiple working conditions is realized, and the device is coupled with a load simulation device and an environment simulation device. The system can comprehensively reflect mechanical response and operation behaviors under complex boundary conditions in actual engineering.

The invention provides a quasi-zero-stiffness tension leg type floating foundation and a power generation platform. The quasi-zero-stiffness tension leg type floating foundation comprises a floating foundation body and tension tendons. The floating foundation comprises an annular water tank, a tower and multiple sets of zero-rigidity connecting assemblies. The zero-rigidity connecting assembly comprises a flexible straight beam and a flexible oblique beam, and the flexible straight beam is located above the flexible oblique beam. The flexible straight beam is a positive stiffness beam; when the displacement of the flexible cant beam is in a first displacement interval, the flexible cant beam has positive rigidity; and when the displacement of the flexible cant beam is in a second displacement interval, the flexible cant beam has negative stiffness. The zero-stiffness connecting assembly composed of the flexible straight beam and the flexible oblique beam is arranged to connect the annular water tank and the tower, the zero-stiffness connecting assembly enters a quasi-zero-stiffness state under the action of low-frequency waves, high flexibility is achieved, flexible low-frequency deformation is achieved, and vibration is effectively buffered and isolated.