Abstract: The present disclosure relates to methods (400, 500) for reducing vibrations in parked wind turbines (10), assemblies (82) comprising vibration mitigating devices (300) for wind turbine blades (22) and wind turbines (10). An assembly (82) comprises a vibration mitigating device (300) configured to be arranged around a wind turbine blade (22) of a wind turbine (10) and comprising one or more inflatable bodies (305) and one or more air flow modifying elements (310); and a pressure source (98) configured to inflate and/or deflate one or more of the one or more inflatable bodies (305) based on measurements of a sensor system (97) configured to monitor the wind turbine (10) and/or environmental conditions around the wind turbine (10).

Abstract: The present invention relates to a measuring device for characterising a shape of a surface of an item, such as a wind turbine blade fibre layup, wherein the measuring device comprises: a frame comprising a holding frame, a first set of two or more probes movably held in the holding frame, each probe having a respective probe end for contacting the surface of the item, and electronic sensing means configured to provide for each probe a respective electrical signal representative of a position of the probe relative to the holding frame. A method for calibrating such a device is provided. Further, a method for characterising a shape of a surface of an item is provided.

Abstract: A wind turbine blade (10, 610) for a rotor of a wind turbine (2) having a substantially horizontal rotor shaft is described. A surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770) is attached to a surface of the wind turbine blade (10). The surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770) is attached to the surface of the wind turbine blade (10, 610) via at least a first attachment part (77, 77?), which is connected to a part of the surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770). The attachment part (77, 77?) comprises a flexible housing (80, 80?, 680, 780) that forms a cavity (81, 81?, 681, 781) between at least the housing (80, 80?, 680, 780) and the surface of the wind turbine blade (10, 610). The cavity (80, 80?, 680, 780) is filled with an adhesive that provides an adhesive bonding to the surface of the wind turbine blade (10, 610).

Abstract: A wind turbine blade (10, 610) for a rotor of a wind turbine (2) having a substantially horizontal rotor shaft is described. A surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770) is attached to a surface of the wind turbine blade (10). The surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770) is attached to the surface of the wind turbine blade (10, 610) via at least a first attachment part (77, 77?), which is connected to a part of the surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770). The attachment part (77, 77?) comprises a flexible housing (80, 80?, 680, 780) that forms a cavity (81, 81?, 681, 781) between at least the housing (80, 80?, 680, 780) and the surface of the wind turbine blade (10, 610). The cavity (80, 80?, 680, 780) is filled with an adhesive that provides an adhesive bonding to the surface of the wind turbine blade (10, 610).

Abstract: The present invention relates to a measuring device for characterising a shape of a surface of an item, such as a wind turbine blade fibre layup, wherein the measuring device comprises: a frame comprising a holding frame, a first set of two or more probes movably held in the holding frame, each probe having a respective probe end for contacting the surface of the item, and electronic sensing means configured to provide for each probe a respective electrical signal representative of a position of the probe relative to the holding frame. A method for calibrating such a device is provided. Further, a method for characterising a shape of a surface of an item is provided.

Abstract: A wind turbine blade (10, 610) for a rotor of a wind turbine (2) having a substantially horizontal rotor shaft is described. A surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770) is attached to a surface of the wind turbine blade (10). The surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770) is attached to the surface of the wind turbine blade (10, 610) via at least a first attachment part (77, 77?), which is connected to a part of the surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770). The attachment part (77, 77?) comprises a flexible housing (80, 80?, 680, 780) that forms a cavity (81, 81?, 681, 781) between at least the housing (80, 80?, 680, 780) and the surface of the wind turbine blade (10, 610). The cavity (80, 80?, 680, 780) is filled with an adhesive that provides an adhesive bonding to the surface of the wind turbine blade (10, 610).

Abstract: A wind turbine blade (10, 610) for a rotor of a wind turbine (2) having a substantially horizontal rotor shaft is described. A surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770) is attached to a surface of the wind turbine blade (10). The surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770) is attached to the surface of the wind turbine blade (10, 610) via at least a first attachment part (77, 77?), which is connected to a part of the surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770). The attachment part (77, 77?) comprises a flexible housing (80, 80?, 680, 780) that forms a cavity (81, 81?, 681, 781) between at least the housing (80, 80?, 680, 780) and the surface of the wind turbine blade (10, 610). The cavity (80, 80?, 680, 780) is filled with an adhesive that provides an adhesive bonding to the surface of the wind turbine blade (10, 610).

Abstract: A wind turbine blade (10, 610) for a rotor of a wind turbine (2) having a substantially horizontal rotor shaft is described. A surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770) is attached to a surface of the wind turbine blade (10). The surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770) is attached to the surface of the wind turbine blade (10, 610) via at least a first attachment part (77, 77?), which is connected to a part of the surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770). The attachment part (77, 77?) comprises a flexible housing (80, 80?, 680, 780) that forms a cavity (81, 81?, 681, 781) between at least the housing (80, 80?, 680, 780) and the surface of the wind turbine blade (10, 610). The cavity (80, 80?, 680, 780) is filled with an adhesive that provides an adhesive bonding to the surface of the wind turbine blade (10, 610).

Abstract: A serrated panel (70) for a wind turbine blade is disclosed. The panel (70) is configured to be attached to the trailing edge of a blade to form a plurality of serrations (71) at the trailing edge of the blade. The serrated panel comprises a base part (72) for attaching the panel (70) to the trailing edge of the blade. An exterior surface (78) of the base part comprises a corrugated surface in direction between longitudinal ends of the panel such that the exterior surface comprises crests (82) aligned substantially with midpoints of bases (80) of the serrations (71) and valleys (83) aligned substantially between serrations (71).

Abstract: A wind turbine blade bushing system for arrangement in a root end of a wind turbine blade is described. The wind turbine blade bushing system comprises a threaded element for retaining a mounting bolt for a wind turbine blade, the threaded element being formed from a first material; and an anchor element for arrangement at the root end of the wind turbine, wherein the anchor element acts to at least partly retain the threaded element in the wind turbine blade, the anchor element being formed from a second material. The first material has a higher strength and higher fracture toughness than the second material.

Abstract: A serrated panel (70) for a wind turbine blade is disclosed. The panel (70) is configured to be attached to the trailing edge of a blade to form a plurality of serrations (71) at the trailing edge of the blade. The serrated panel comprises a base part (72) for attaching the panel (70) to the trailing edge of the blade. An exterior surface (78) of the base part comprises a corrugated surface in direction between longitudinal ends of the panel such that the exterior surface comprises crests (82) aligned substantially with midpoints of bases (80) of the serrations (71) and valleys (83) aligned substantially between serrations (71).

Abstract: A wind turbine blade having a surface mounted device attached thereto via at least a first attachment part, which is connected to a part of the device. The first attachment part comprises an outer attachment part providing a first bonding connection between the device and the surface of the blade, wherein the first bonding connection is an elastic bond, and an inner attachment part providing a second bonding connection between the device and the surface of the blade, wherein the second bonding connection has a structural bond. The structural bond prevents the surface mounted device from creeping and the elastic bond region relieves stresses on the bond line, such as peel stresses, whereby the surface mounted device is less likely to be ripped off the surface of the blade due to forces affecting the device or the blade.

Abstract: This invention relates to a bulkhead unit, a wind turbine blade comprising the bulkhead unit, a lifting device and methods of assembling and installing the bulkhead unit in the wind turbine blade. The bulkhead unit comprises a bulkhead element substantially extending in a radial direction and a frame structure attached to the bulkhead element. The frame structure provides support for the bulkhead element and additional components mounted to the frame structure. The frame structure comprises a plurality of frame elements which are interconnected to form a number of areas that are aligned with corresponding openings in the bulkhead element. The lifting device is used to lift the bulkhead unit into position and fix the bulkhead unit relative to the blade shell.

Abstract: A serrated panel (70) for a wind turbine blade is disclosed. The panel (70) is configured to be attached to the trailing edge of a blade to form a plurality of serrations (71) at the trailing edge of the blade. The serrated panel comprises a base part (72) for attaching the panel (70) to the trailing edge of the blade. An exterior surface (78) of the base part comprises a corrugated surface in direction between longitudinal ends of the panel such that the exterior surface comprises crests (82) aligned substantially with midpoints of bases (80) of the serrations (71) and valleys (83) aligned substantially between serrations (71).

Abstract: A serrated panel (70) for a wind turbine blade is disclosed. The panel (70) is configured to be attached to the trailing edge of a blade to form a plurality of serrations (71) at the trailing edge of the blade. The serrated panel comprises a base part (72) for attaching the panel (70) to the trailing edge of the blade. An exterior surface (78) of the base part comprises a corrugated surface in direction between longitudinal ends of the panel such that the exterior surface comprises crests (82) aligned substantially with midpoints of bases (80) of the serrations (71) and valleys (83) aligned substantially between serrations (71).

Abstract: A serrated panel (70) for a wind turbine blade is disclosed. The panel (70) is configured to be attached to the trailing edge of a blade to form a plurality of serrations (71) at the trailing edge of the blade. The serrated panel comprises a base part (72) for attaching the panel (70) to the trailing edge of the blade. An exterior surface (78) of the base part comprises a corrugated surface in direction between longitudinal ends of the panel such that the exterior surface comprises crests (82) aligned substantially with midpoints of bases (80) of the serrations (71) and valleys (83) aligned substantially between serrations (71).

Abstract: A wind turbine blade having a transition between two reinforcement fiber types is described. A gradual transition is provided by a combined double-tapered thickness section with a first type of reinforcement fibers sandwiched between a second type of reinforcement fibers or vice versa. The double-tapering is provided during layup and the reinforcement material is impregnated with a polymer resin and then cured or hardened so that the two types of reinforcement fibers are embedded in a common polymer matrix.

Abstract: A serrated panel (70) for a wind turbine blade is disclosed. The panel (70) is configured to be attached to the trailing edge of a blade to form a plurality of serrations (71) at the trailing edge of the blade. The serrated panel comprises a base part (72) for attaching the panel (70) to the trailing edge of the blade. An exterior surface (78) of the base part comprises a corrugated surface in direction between longitudinal ends of the panel such that the exterior surface comprises crests (82) aligned substantially with midpoints of bases (80) of the serrations (71) and valleys (83) aligned substantially between serrations (71).

Abstract: A wind turbine blade having a surface mounted device attached thereto via at least a first attachment part, which is connected to a part of the device. The first attachment part comprises an outer attachment part providing a first bonding connection between the device and the surface of the blade, wherein the first bonding connection is an elastic bond, and an inner attachment part providing a second bonding connection between the device and the surface of the blade, wherein the second bonding connection has a structural bond. The structural bond prevents the surface mounted device from creeping and the elastic bond region relieves stresses on the bond line, such as peel stresses, whereby the surface mounted device is less likely to be ripped off the surface of the blade due to forces affecting the device or the blade.

Abstract: A wind turbine blade (10, 610) for a rotor of a wind turbine (2) having a substantially horizontal rotor shaft is described. A surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770) is attached to a surface of the wind turbine blade (10). The surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770) is attached to the surface of the wind turbine blade (10, 610) via at least a first attachment part (77, 77?), which is connected to a part of the surface mounted device (70, 70?, 170, 270, 370, 470, 570, 670, 770). The attachment part (77, 77?) comprises a flexible housing (80, 80?, 680, 780) that forms a cavity (81, 81?, 681, 781) between at least the housing (80, 80?, 680, 780) and the surface of the wind turbine blade (10, 610). The cavity (80, 80?, 680, 780) is filled with an adhesive that provides an adhesive bonding to the surface of the wind turbine blade (10, 610).