The restoring force of the mooring line is primarily generated by the hanging weight and pretension in the line. Lines may also be made from a combination of wire rope and synthetic materials, in which case the line is referred to as a hawser. The component 2 comprises a plurality of elongate flexible elements 6. The elements 6 are formed from elastomeric materials and have a variety of lengths, as shown in FIG. FIG. 30 shows a further embodiment of a mooring component 2 according to the present invention. FIG. 32 shows that, as the tide flows, the floating body 3 drifts in one direction from equilibrium to a maximum offset point at high tide. In one embodiment, the fixed member is a ring arranged to float approximately 3 meters below the point where the moveable member of the WEC device sits in the water.
Dolor De Garganta
FIG. 16 is a cutaway perspective view of the WEC device of FIG. FIG. 21 shows a surface floating WEC device 211 comprising two floating members 213 and 214 which are designed to float on the water surface. FIG. 10 shows a WEC device 101 of the point absorber type, comprising a damping structure 102 according to the present invention. The damping member (or members) desirably applies counter forces having both lateral and vertical components and thus automatically acts to straighten the moveable member, thus maintaining an optimal alignment to the waves when in use, that is, generally perpendicular to the direction of travel of the waves. In tidal flow regions, that is, where a moored body is acted on by tidal streams or tidal turning, the drift forces can pull the mooring sizeable distances in one direction (horizontally) and then the other as the tide changes. In certain environments, wave heights, drift lengths or tidal changes can easily exceed 25% of the water depth.
The problem lies in the relationship between the size of the waves, drift lengths and/or tidal changes, which are encountered in these environments and the inability of traditional mooring systems to flex with the forces and extension such conditions apply to the mooring, without resorting to large footprints or over-engineered solutions. For normal waves, the dampening counterforce is very low as shown in FIG. Another drawback of this type of system is that, in order to deal with large waves, the chain or cable lifts as the water depth increases and the floater moves both vertically and horizontally to a new position.
Thus, a large space envelope is required to allow horizontal movement as water depths rise. Ejercicios dolor de espalda alta . Thus, the deformable element or elements must be designed and modified to meet the desired or required curve. Failure to achieve this results in significant loads being applied to the mooring system, which must either be designed for (which may result in overengineering of the mooring system) or the system risks breakages. This means that more material, or higher-grade material, must be used, thereby increasing cost. In many mooring applications, there is a requirement for this counterforce to be non-zero, thereby providing a restoring force to return the moored body to its original location. The size of the ring may be selected to ensure a balance between a large vertical component of the counter force (smaller ring) to limit heave as well as sufficient lateral force to correct surge (larger ring).
The size and profile of the fixed member are selected to maximise the downthrust provided by the ring. According to a first aspect, the present invention relates to a damping structure for a wave energy conversion device, comprising a first member, and a damping member having a reversible non-linear stress-strain response, wherein the damping member is connectable to the first member and to a second member or float of a wave energy conversion device. Thus, the stress-strain response of the damping structure in each direction may be tailored to the expected conditions. Dolor lumbar y cadera . 7, there is illustrated an alternative embodiment of the damping structure of the present invention. The damping member may comprise a composite material.
Typically, these elastomeric solutions comprise a multi-strand elastomeric component. Similarly, the damping member could comprise a plurality of components of different lengths, materials or thicknesses. There are a number of disadvantages associated with this damping apparatus. There are several disadvantages associated with known energy absorbing devices. A further disadvantage associated with known wave energy converters is poor efficiency of energy capture. In contrast, the moveable member or float of the WEC moves in an oscillatory manner in response to wave motion of the ocean. A further damping member, arranged to damp heave (vertical) forces (between components of the WEC device), may be used to limit the maximum vertical extension of the device. In another embodiment, the damping member is provided with a plurality of electronic teeth. In a preferred embodiment, the component is relatively short. 28 a and 28 b, in one embodiment, the mooring component 2 of the present invention is provided in the form of a hawser.
In one embodiment, the present invention relates to a damping structure for a wave energy conversion device, comprising a fixed member, and a damping member having a reversible non-linear stress-strain response, wherein the damping member is connectable to the fixed member and to a moveable member or float of a wave energy conversion device. In one embodiment, the damping member could vary in thickness along its length. FIG. 18 shows a WEC device 181 comprising a damping structure 182. The WEC device is similar to that shown in FIGS. FIG. 29 shows another embodiment of a mooring component 2 according to the present invention. Dolor lumbar por la noche . In all such cases, the overall stress-strain response of the damping member is a composite of the individual responses of the component parts. The alignment and/or design of each damping member may allow the damper or damping structure to provide different stress-strain responses along different axes.
Tecnicas De Relajacion
Several WEC devices may be interconnected to form a raft-like structure. This arrangement allows the damping structure to work in a single direction only, leaving the float free to move in other directions. Each damping member may have an individual stress-strain response. Thus, the deformable element may have a complex non-linear stress-strain response within its normal operating range. This pair of dampers could alternatively be attached between the upper end of the shaft and the top of the float.
Dolor Espalda Cáncer Pulmón
Tidal cycles last approximately 12 hours and 25 minutes in most locations and the tidal cycles involves the following sea level changes. The dampers may be tensile or compressive, or a mixture of both. Both compressive and tensile damping members can be provided as indeed can a combination of compressive and tensile damping members. According to an aspect of the invention, a plurality of damping members may be provided, wherein each damping member is arranged to damp the movement of the device substantially along one axis only.
As an ocean wave 10 approaches the device 1, the buoyancy of the moveable member causes it to move upwards with the surface of the ocean. In some embodiments, the first member and the second member exhibit different frequency responses to wave motion, causing relative motion therebetween when waves are incident upon them.
As shown in the drawing, two pairs of dampers are arranged to correct pitch and surge of the device. This reduces the risk of damage to the coupling system 5 of the WEC device 1 caused by stress from angular differences between the moveable member 3 and fixed members 4 of the WEC device. Pitch forces from the waves cause the float 103 to rotate above this point. This allows undesired or excessive forces in a particular direction to be counteracted without impacting on perpendicular forces and with lower impact on non-perpendicular forces. The counterforce exerted on the moveable member by the damping member is non-linearly related to the applied force and the rate of application of that force. When the float moves downwards due to wave motion, these dampers exert an upward damping force on the float. Suitably, the component is connectable between a floating body, such as a floating fish farm, a floating platform, a wave energy conversion device or a floating wind farm, and the sea bed.
- Extrae el cristal de una hoja de aloe y procésalo en la licuadora junto con un vaso de agua
- Comer alimentos viscosos
- Párate con los pies separados a la anchura de los hombros y el tronco bien derecho
- Ayuda a acelerar la curación
- Infecciones respiratorias
- Actividad deportiva inapropiada y excesiva
- Elevación de la pierna extendida. SLR
- Disminuir el dolor crónico
For example, the member may have sufficient inherent inertia to prevent substantial movement thereof by wave motion. It is appreciated that certain features of the invention, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. However, these mooring solutions that are suitable for deep water or dock mooring are not suitable for low scope or small footprint mooring applications, where some devices, particularly renewable energy devices, need to operate.