CN106436672A - Water level adaptive anti-ship collision device for offshore wind turbines based on single pile foundation - Google Patents

Abstract

The self-adaptive ship collision preventing device for the water level of the offshore wind turbine with the single pile foundation mainly comprises an outer-layer thin-wall steel plate structure, a soft rubber spacer structure and a self-weight balance floating body structure. The ship collision preventing device is a gravity and buoyancy self-balancing combined structure and can generate self-adaptive adjustment vertical motion along the single-pile foundation of the wind turbine along with the change of water level. The beneficial effects are that: the outer layer thin-wall steel plate structure can dissipate the collision energy of the ship by utilizing the plastic deformation of the structure; the soft rubber spacer layer structure can effectively reduce the ship collision force transmitted to the tower structure; the arrangement height range of the ship collision preventing device in the area with large tidal level change can be effectively saved by utilizing the water level self-adaptive design scheme of the self-weight balance floating body structure; the device has reasonable structural design and convenient construction, does not influence the structural design of the original wind turbine, and is suitable for the ship collision prevention design of the single-pile offshore wind turbine foundation structure which is built and planned to be newly built.

Description

Water level adaptive anti-ship collision device for offshore wind turbines based on single pile foundation

technical field

The invention belongs to the field of ocean energy utilization, and in particular relates to the protection design of offshore wind turbine structures.

Background technique

With the continuous expansion of the distribution of offshore wind farms, accidental collisions of various ships at sea have become an unavoidable major safety hazard. At present, the wind turbine foundation structures of offshore wind farms that have been built and are under construction mainly include fixed support platform structures such as single pile, multi-pile, gravity, jacket, and high pile caps. Among them, the single pile foundation is in the form of Its better cost performance has become the most widely used foundation form of offshore wind turbines. However, due to the fact that the horizontal rigidity of the monopile foundation is relatively weak, it is more dangerous in the face of unexpected ship collisions. An offshore wind turbine is a typical high-rise structure with a concentrated mass on the top. The large deformation of the bottom of the collision can easily cause a strong dynamic response of the top structure-eventually leading to the instability and collapse of the whole structure. The top structure (blades, hub and nacelle) is accelerated by gravity and falls back against the hull, with necessarily disastrous results.

Many scholars at home and abroad have further pointed out the importance of research on protection devices for ship collision offshore wind turbines. Although some scholars have proposed some effective measures to avoid ship collision with offshore wind turbines, in the face of complex and changeable marine environments, how to comprehensively Structurally improving the ability of offshore wind turbines to resist ship collisions has a more important safety significance. Some scholars have studied the design of protective devices for ship collision bridges, ships and other offshore structures, and achieved good protection effects, but there is still a lack of design and engineering application plans for offshore wind turbine anti-ship collision devices.

Contents of the invention

The object of the present invention is to propose a single-pile foundation offshore wind turbine water level self-adaptive anti-ship collision device.

The object of the present invention is achieved like this: the water level self-adaptive anti-ship collision device of a single-pile foundation offshore wind turbine comprises a single-pile foundation offshore wind turbine structure and a combined structure of an anti-ship collision device; the single-pile foundation offshore wind turbine structure includes a wind turbine , a tower structure, a single pile foundation, characterized in that the combined structure of the anti-ship collision device includes a thin-walled steel plate structure, a soft rubber spacer structure and a self-weight balancing floating body structure, and the thin-walled steel plate structure is set on the single pile foundation The casing at the waterline, the casing has a fitting hole corresponding to the monopile foundation on the upper and lower parts of the waterline, and there is a gap between the fitting hole and the monopile foundation. A rubber pad that matches the set hole on the steel plate structure. The outer peripheral surface of the rubber pad is flat. The outer peripheral planes of the rubber pad with two soft rubber spacer structures are respectively fixedly connected with the upper and lower set holes of the thin-walled steel plate structure. The soft rubber spacer The inner peripheral surface of the structure is an arc surface, which is opposite to the single pile foundation. There is a gap between the arc surface and the surface of the single pile foundation, and the gap is 10-20mm. Can move vertically; the self-weight balance floating body structure is an annular box made of medium-density polyethylene material, the annular box is arranged along the lower part of the inner surface of the thin-walled steel plate structure shell, and is fixedly connected with the thin-walled steel plate structure.

The water level self-adaptive anti-ship collision device for a single-pile foundation offshore wind turbine of the present invention is characterized in that the vertical height of the thin-walled steel plate structure is 4m-6m, and the thickness of the steel plate is 5mm-10mm.

The water level self-adaptive anti-ship collision device of the single-pile foundation offshore wind turbine of the present invention is characterized in that the shell surface of the thin-walled steel plate structure is not provided with openings or is provided with openings. If there are openings, the openings are located at Evenly arranged on the shell, the hole diameters are the same or different, the hole diameter is 10cm-20cm, and the distance between two adjacent holes is 50cm-100cm.

The water level self-adaptive anti-ship collision device for a single-pile foundation offshore wind turbine of the present invention is characterized in that the soft rubber spacer structure has a radial thickness of 0.5m-1.0m and a vertical height of 1.0m-1.5m.

The water level self-adaptive anti-ship collision device of the single-pile foundation offshore wind turbine of the present invention is characterized in that the rubber material of the soft rubber spacer structure is a rubber material subjected to anti-seawater corrosion treatment.

The beneficial effects of the present invention are:

1. The structure design of the device is reasonable, the construction is convenient, it does not affect the original wind turbine structure design, and it is suitable for the anti-ship collision design of the built and planned new single pile offshore wind turbine foundation structure.

2. The water level adaptive design scheme of the device can effectively save the deployment height range of the anti-ship collision device in areas with large tidal level changes, and save the cost of the protective device.

3. The outer thin-walled steel plate structure can use its own plastic deformation to dissipate the collision energy of the ship, especially the open-hole design can effectively reduce the cost of steel, reduce the wave force load acting on the protective device and facilitate the plastic deformation of the protective thin-walled steel plate The absorption of ship collision energy better protects the safety of the main structure of the wind turbine.

4. The soft rubber spacer layer can effectively reduce the ship collision force transmitted to the tower structure, and its design scheme of upper and lower layers is also convenient for the plastic deformation energy consumption of the outer thin-walled steel plate (no rubber contact part) after impact , can also save the height of the rubber material vertically arranged along the tower.

5. The self-weight balance floating body structure can balance the self-gravity and buoyancy of the protection device, and realize the vertical movement of the protection device along the single pile foundation of the wind turbine with the change of water level and self-adaptive adjustment.

6. The present invention can be widely applied to the anti-ship collision design of related other basic forms of offshore wind turbine structures.

Description of drawings

Figure 1 is a schematic diagram of a water level adaptive anti-ship collision device for a single-pile foundation offshore wind turbine

Figure 2 is a schematic cross-sectional view of an adaptive anti-ship collision device

Figure 3 is a schematic diagram of the top view of the self-adaptive anti-ship collision device

In the figure, 1. Wind turbine, 2. Tower structure, 3. Single pile foundation, 4. Water level adaptive anti-ship collision device, 5. Thin-walled steel plate structure, 6. Soft rubber spacer structure, 7. Self-weight balancing floating body structure.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Single pile foundation offshore wind turbine water level adaptive anti-ship collision device, including single pile foundation offshore wind turbine structure and anti-ship collision device combination structure; single pile foundation offshore wind turbine structure includes wind turbine 1, tower structure 2, single pile The foundation 3; the combined structure 4 of the anti-ship collision device includes a thin-walled steel plate structure 5, a soft rubber spacer structure 6 and a self-weight balance floating body structure 7; the thin-walled steel plate structure 5 is a shell set on the waterline of the single pile foundation 3, The casing has a fitting hole corresponding to the monopile foundation 3 on the upper and lower parts of the waterline. There is a gap between the fitting hole and the monopile foundation 3. The vertical height of the thin-walled steel plate structure 5 is 4m-6m, and the thickness of the steel plate is 5mm-10mm, thin-walled steel plate structure 5 without openings or openings 8 on the surface of the shell, if there are openings, the openings 8 are evenly arranged on the shell, and the diameters of the openings 8 are the same or different 10cm to 20cm, and the distance between two adjacent holes is 50cm to 100cm. The soft rubber spacer structure 6 is a rubber pad matched with the upper hole of the thin-walled steel plate structure 5. The outer peripheral surface of the rubber pad is a plane. A set of holes is fixedly connected, the inner peripheral surface of the soft rubber spacer structure 6 is an arc surface, the arc surface is opposite to the single pile foundation 3, the radial thickness of the soft rubber spacer structure 6 is 0.5m-1.0m, and the vertical height is 1.0 m-1.5m, the rubber material of the soft rubber spacer structure 6 is a rubber material that has been treated to prevent seawater corrosion. There is a gap between the arc surface and the surface of the single pile foundation 3, and the gap is 10-20mm. The soft rubber spacer layer changes with the water level. 6. It can move vertically along the single pile foundation 3 of the wind turbine. The self-weight balance floating body structure 7 is an annular box made of medium density polyethylene material. The annular box is arranged along the lower part of the inner surface of the thin-walled steel plate structure 5 and is fixedly connected with the thin-walled steel plate structure 5 .

Example 1:

Taking the tonnage of a colliding ship as 500t and the collision speed as 2m/s as an example, the main structural parameters of the self-adaptive anti-ship collision device for a single pile wind turbine are as follows: thin-walled steel plate structure 5 with a thickness of 5mm, the layout height is -3m to 3m from the water surface, and The surface of the thin-walled steel plate structure 5 is evenly opened, the opening diameter is 0.1m, and the hole spacing is 0.5m; the soft rubber spacer structure 6 is arranged in two layers, which is consistent with the arrangement height of the thin-walled steel plate structure 5, that is, -3m and +3m respectively, The radial thickness and vertical thickness of the soft rubber spacer structure 6 are both 1m, and the diameter of the arc surface close to the single pile foundation (3) is 1.0m; the self-weight balancing floating body structure 7 is an annular box made of medium-density polyethylene material The volume of the box needs to be designed in combination with the overall weight of the anti-collision device to achieve the self-balancing effect of gravity and buoyancy of the anti-collision device.

The construction and installation process of the water level adaptive anti-ship collision device for offshore wind turbines with single-pile foundation is as follows: firstly, using the existing single-pile platform construction technology, the single-pile foundation 3 is transported to the installation position and fixed on the seabed by piling; secondly, the anti-ship The thin-walled steel plate structure 5, the soft rubber spacer structure 6 and the self-weight balance floating body structure 7 of the combined structure 4 of the ship collision device are assembled on shore, and the assembled protective device 4 is transported to the installation position by a professional construction ship and installed on the single pile support structure 3. Finally, the wind turbine tower structure 2 and the top wind turbine 1 are installed, and the construction and installation of the water level adaptive anti-ship collision device for the offshore wind turbine on the single pile foundation is completed.

Claims (5)

1. single-pile foundation marine windmill water level self-adapting type ship collision prevention device, including single-pile foundation marine windmill structure With ship collision prevention device combinative structure；Single-pile foundation marine windmill structure includes wind energy conversion system (1), pylon structure (2), single pile Basic (3) are it is characterised in that described ship collision prevention device combinative structure (4) includes thin-walled steel plate structure (5), soft rubber dottle pin Structure (6) and dead-weight balanced float structure (7), described thin-walled steel plate structure (5) is the waterline position being sleeved on single-pile foundation (3) Housing, housing respectively has a suit hole corresponding with single-pile foundation (3) in waterline upper and lower, suit hole and single pile base There is space, described soft rubber dottle pin structure (6) is the rubber matching with thin-walled steel plate structure (5) upper suit hole between plinth (3) Pad, the outer peripheral face of rubber blanket is plane, the periphery plane of the rubber blanket of two soft rubbers dottle pin structure (6) respectively with thin-walled steel plate The upper and lower two suit holes of structure (5) are fixedly connected, and the inner peripheral surface of soft rubber dottle pin structure (6) is arc surface, arc surface and single pile Basic (3) relatively, there is gap on arc surface and single-pile foundation (3) surface, and gap is 10～20mm, with SEA LEVEL VARIATION soft rubber dottle pin Layer (6) can catenary motion along wind energy conversion system single-pile foundation (3)；Described dead-weight balanced float structure (7) is medium density polyethylene material The annular casing making, annular casing is along thin-walled steel plate structure (5) housing inner face lower disposed, solid with thin-walled steel plate structure (5) Fixed connection.

2. single-pile foundation marine windmill water level self-adapting type ship collision prevention device according to claim 1, its feature exists It is 4m-6m in the vertical height of described thin-walled steel plate structure (5), steel plate thickness is 5mm-10mm.

3. single-pile foundation marine windmill water level self-adapting type ship collision prevention device according to claim 2, its feature exists Do not set perforate on described thin-walled steel plate structure (5) housing face or be provided with perforate (8), be provided with perforate, perforate (8) is on housing Be evenly arranged, the aperture of perforate (8) is identical or different, spacing between 10cm～20cm, adjacent holes for the aperture be 50cm～ 100cm.

4. single-pile foundation marine windmill water level self-adapting type ship collision prevention device according to claim 1, its feature exists In described soft rubber dottle pin structure (6) radial thickness 0.5m-1.0m, vertical height 1.0m-1.5m.

5. single-pile foundation marine windmill water level self-adapting type ship collision prevention device according to claim 4, its feature exists Elastomeric material in described soft rubber dottle pin structure (6) is by the elastomeric material that anti-seawater corrosion is processed.