KR20190006020A - Marine window assembly - Google Patents

Abstract

The present invention relates to a window assembly (1) mounted on an aperture (5) of an offshore structure, said window assembly (1) comprising a window frame (2) attached to the lateral part (6) And a membrane unit (3) connecting the window frame (2) to the window box (4), wherein the window frame (2) and the window box 4 each comprise attachment means for releasably receiving the membrane unit 3. The invention also relates to a method of mounting a window assembly (1) to an aperture / opening (5) of an offshore structure.

Description

Marine window assembly

The present invention relates to a window assembly mounted in an aperture / opening of an offshore structure,

A window frame attached to the exterior of an offshore structure,

A window box attached to the interior of the offshore structure, and

And a membrane unit connected to the window frame and the window box.

The present invention also relates to a method of mounting a window assembly in an aperture / opening of an offshore structure.

Window assemblies, such as windows and scuttles, made from structures of offshore structures generally consist of window frames and window boxes. The window frame houses the glass and gasket system and is mounted directly on the carving / cutout, i.e., aperture / opening previously formed in the outer hull structure during the initial construction process. Up to now, in the field of window assemblies, the window box is an internal part of the liner, i.e. the internal part of the air, gas and sound isolation connection / membrane between the hull structure and the window frame. And, the window frame is made of aluminum or steel.

During the construction and construction of large ships, platforms and other offshore structures, the window frame is typically installed at an early stage of construction. In the latter part of the construction process, an interior (bulkhead) lining / panel, such as a receiving space and a work space, is installed to mount the window box.

Window assemblies are typically fabricated from glass fiber or thin steel plates and have a three-dimensional prefabricated structure with a width x height x depth (W x H x D) up to 2000 x 3000 x 500 mm.

Window boxes made of glass fiber provide a smooth surface that does not require additional surface treatment. These window boxes can be easily mounted and can adjust / adjust the depth dimension of the window assembly. However, the window box made of glass fiber has a disadvantage that it requires its own mold which can not be prepared until the final specification such as the wall thickness in each window box shape. Also, if the specification changes, the mold must be modified or reconfigured to require resources.

The window box made of steel has a disadvantage that a special welding process is required during manufacturing and mounting so that the steel plate constituting the window box is not shaken. Finishing and surface treatment are also comprehensive.

Common to both types of window boxes described above is the disadvantage in terms of storage and shipping, which must be produced and / or assembled before shipping to each offshore construction site. Thus, such window boxes often result in relatively large shipments, i.e., space occupied by the product during shipment, thus resulting in relatively high shipping costs. Also, due to the size and shape of the assembled window box, handling of offshore structures is difficult. The window box has to be relatively fully fastened to the carving / incision, and thus there is a risk of re-production and / or re-installation using already assembled window boxes.

In the present invention, the term "offshore structure" means any type of ship, fixed, floating or quasi-submersible (oil platform / offshore platform) and fixed on the seabed for oil and gas production and storage, The accommodation facilities are also to be understood as other well-preserved floats or fixtures.

Thus, known window assemblies require large shipping volumes and are difficult and expensive to adjust to various dimensions.

According to the present invention, there is provided a window assembly mounted to an aperture / opening of an offshore structure,

A window frame adapted to be attached to the exterior of the offshore structure,

A window box adapted to be attached to the interior of the offshore structure, and

A membrane unit connecting the window frame and the window frame,

The window frame, window box and membrane unit are three separate elements.

The aperture / opening of the offshore structure may be in the hull structure of the offshore structure and may be a carved / incised portion. In addition, the inside of the offshore structure may be the inside lining of the offshore structure or the hull structure.

The builder of the offshore structure wishes to mount window assemblies of various widths, heights and / or depths. Thus, there is a need for a window assembly, and the dimensions of this window assembly can be easily adjusted / customized to meet various requirements as well as predetermined requirements.

By providing window assemblies that are divided into window frames, window boxes, and membrane units, the window assemblies can be manufactured and mounted to meet yard construction processes and schedules. This provides flexibility in both manufacturing and installation processes. In addition, the components of the window assembly can be shipped step-by-step, requiring minimal available storage space, thus optimizing logistics management on the construction site.

In one embodiment, the window frame and the window box may each comprise attachment means for releasably receiving the membrane unit.

This can be achieved by adjusting the dimensions of the window assembly such that the depth of the window assembly can be adjusted when a new inner lining is installed or the dimensions of the window assembly can be adjusted such that parts of the window assembly can be easily separated and re- It is advantageous if another window assembly is to be installed if it is detached by a releasable attachment. The attachment means may be a rabbet, a flange, a groove, a tape-like means (such as Velcro) having the ability to reattach several times, or a means having magnetic properties.

Thus, the present invention provides a solution that is easy to manufacture, mount, and detach and provide logistics optimization.

In one embodiment, the window box may comprise a plurality of side panels, each side panel being connected to at least one other side panel, wherein the side panels form a window box when connected to each other.

The window box may include a plurality of side panels that together form a window box. Thus, each side panel forms a side / edge of the window box such that, for example, the four side window box is formed by four side panels, each side panel is connected to two other side panels, Three window boxes are formed by three side panels or the like.

The side panels can be manufactured by forming long side panels from which side panels of the required length are cut. Thus, any dimension of the aperture / opening in an offshore structure can be used because the window box is easily customized to the required dimensions. Also, the side panels are easy to manufacture and manufacture, and the production of the side panels can be delayed until needed in the construction process.

An expensive mold with a fixed dimension is not needed to make the window box one member.

In addition, if the side panels arrive at the offshore structure and are produced as individual side panels and assembled panel panels when the window box is installed, the window box is packed and shipped / densely packed. As a result, transportation costs are reduced and the amount of storage is reduced compared to when a window box is assembled and molded / molded into a single piece before packaging and shipment.

In a single chamber, the membrane unit comprises a plurality of membranes.

The membrane unit may comprise a plurality of membranes forming a membrane unit. Thus, each membrane may form a side / edge of the membrane unit, e.g., a four-sided membrane unit is formed by four membranes, and a three-sided membrane unit is formed by three membranes or the like.

The membrane is formed, for example, by cutting the individual membranes in one or more large membranes. Thus, any size carving / incision in the marine structure can be used because the membrane unit is easily customized to the required dimensions. Thus, the membrane is easy to manufacture and manufacture, and the production of the membrane unit can be delayed until needed in the construction process.

An expensive mold having a fixed dimension for producing the membrane unit is not required.

If the membrane arrives at an offshore structure and is manufactured with multiple membranes or simply assembled when the membrane unit and window box are installed, the membrane unit can be packed and shipped / transported in low shipping volume. As a result, the storage volume is reduced and the shipping cost is reduced compared to when the membrane unit is assembled before being shipped or manufactured / molded into one member.

In one embodiment, each membrane may be disposed adjacent to at least one other membrane such that the membrane may together form a closed structure defining an interior volume of the window assembly when connecting the window frame to the window box.

As discussed above, each membrane may form side / edges of the membrane unit, e.g., a four-sided membrane unit is formed by four membranes, and similarly for a three-sided membrane unit or a multi- . Thus, each membrane may be disposed adjacent to at least one other membrane, for example, where the edges of two membranes are adjacent to each other or in contact with each other, or the edge of one membrane is adjacent to or adjacent to the surface of another membrane Or the surface of one membrane may be disposed or contacted adjacent the surface of the other membrane.

Membranes of various shapes and sizes can be combined to form a membrane unit. Thus, the cross-sectional shape of the membrane unit may, for example, be the same as the shape of the window frame and / or the window box at the entire length of the membrane unit or at the end of the membrane unit, do.

In one embodiment, the attachment means can be adapted to adjust the distance between the window box and the window frame.

The attachment means can be adapted to adjust the distance between the window box and the window frame so that the depth of the window assembly can be easily adjusted if needed. Adjustment may be appropriate since the distance between the outer and inner portions of the hull structure may be set only with a constant tolerance. Also, adjustments may be involved if new internal components are installed and the depth of the window assembly is changed.

The adjustment may vary depending on the type of attachment means. Thus, the attachment means can be in the form of, for example, a groove for receiving and holding the membrane unit, the distance being adjustable while the membrane unit is attached to the attachment means. On the other hand, if the attachment means is, for example, a tape-like means, the membrane unit may have to be separated before the distance can be adjusted.

In one embodiment, the attachment means may comprise first and second arms adapted to receive / engage the membrane.

In one embodiment, at least a portion of the extensions of the first and second arms may be configured to tightly tighten the membrane.

The attachment means includes first and second arms configured to receive / couple / support a membrane unit or membrane such that the membrane unit or membrane is secured (at least temporarily) to the attachment means. One or both ends of the arm may contact the membrane / membrane unit during attachment. One or both sides of the arm may contact the membrane / membrane unit during attachment.

At least a portion of the extension of the arms may be tightly coupled to the membrane / membrane unit so as to provide stability during attachment so as to prevent the membrane / membrane unit from shaking or moving against the attachment means in advance.

In one embodiment, the window assembly may dampen the level of sound passing through the window assembly and / or may comprise refractory material, or may provide an airtight seal between the exterior and the interior of the offshore structure .

Thus, the window assembly effectively attenuates the level of sound and can be tailored to include one or more functions such as fire resistance and / or confidentiality. Whether or not to apply more than one function will depend on the various climate / environmental requirements for the offshore structure, in particular the location of the window assembly relative to the offshore structure, the type of offshore structure, aesthetic requirements and sound, fire and gas composition.

The level of sound can be attenuated, for example, by installing a removable window in the window box or applying a membrane material that prevents attenuation of the sound level.

In one embodiment, the membrane unit may be adapted to attenuate the level of sound passing through the interior volume of the window assembly.

Thus, the membrane unit may comprise materials and / or shapes and / or structures that facilitate attenuation of the level of sound passing through the inner volume of the window assembly. The membrane unit may include a plurality of holes, such as through holes or blind holes, that are adapted to absorb a portion of the sound pressure within the interior volume. The membrane unit may include elastic and / or flexible materials adapted to provide and reduce sound pressure within the interior volume by moving / vibrating against the sound pressure.

Providing a membrane unit comprising a plurality of membranes has the additional advantage that the membrane unit is at least partially protected from reverberation when compared to when the membrane unit is fabricated as a unit, i. E. Does not comprise a separate membrane.

Providing a membrane unit comprising a plurality of membranes provides a window assembly that is easy to combine / configure with other standards solutions. In addition, it is easy to add additional effects / characteristics or characteristics to the membrane unit such as a sound-absorbing feature, for example a special color system marking for emergency escape.

In one embodiment, the window box may comprise aluminum.

Aluminum provides good and aesthetic surface treatment, and possible anodizing of aluminum provides a solid surface.

Aluminum is lighter in weight than steel, which means that lighter weight reduces shipping costs and reduces shipping costs to offshore structures. Weight reduction also makes the window assembly easier to handle.

According to the present invention, there is further provided a method of mounting a window assembly in an aperture / opening of an offshore structure,

Providing a window frame, a window box and a membrane unit;

Mounting a window frame within said aperture / aperture;

Attaching the window frame to the exterior of the offshore structure;

- connecting the membrane unit to the window frame using a detachably receiving window frame attachment means;

Connecting the window box to the membrane unit using attachment means of the window box releasably receiving the membrane unit; And

And attaching the window box to an interior portion of the offshore structure.

In one embodiment, the step of connecting the membrane unit to the window frame comprises the step of connecting each of the membranes of the membrane unit to the window frame by use of an attachment means of the window frame releasably receiving the membrane, Thereby forming a closed structure defining the interior volume of the window assembly.

In one embodiment, the method may further comprise connecting each side panel of the window box to at least one other side panel to form the window box when the side panels are connected.

In one embodiment, the window box and / or membrane unit may be collected in the field.

Window assemblies can be collected / assembled on site in offshore structures. Thus, window frames, window boxes, and membrane units can be shipped as separate, unassembled units. Thus, total shipments, shipping costs, and required storage facilities are reduced compared to shipping window assemblies after assembly. This is further reduced by providing the window box and / or membrane unit as separate side panels and membranes, respectively.

In one embodiment, the window assembly may include a blind, e.g., a window box, for holding the blind and / or means for connecting the blind to the window box. Such blades may be roller blinds or venetian blinds or others. By providing the window assembly including the blind, the user can visually block the window assembly.

According to the present invention, it is possible to provide a solution that solves the problems of the prior art, and that facilitates manufacture, mounting and disassembly, and provides logistics optimization.

The structure and function of the window assembly and the window assembly and mounting method will be described in more detail with reference to the exemplary embodiments shown in the drawings.
1 is an exploded perspective view of a window assembly;
2 is a front view of the window box.
3 is a view showing a window frame viewed from the front.
Figure 4 is a side view of the assembled window assembly.
Figure 5 is a top view of an assembled window assembly mounted on an offshore structure.
Fig. 6 is an enlarged view showing a partial cross-sectional view of a portion A in Fig. 5. Fig.
Fig. 7 is an enlarged partial cross-sectional view of part B in Fig.

In the figure, the window assembly is shown in a shape with four sides. However, it should be understood that other shapes, such as triangular, polygonal, circular, oval, etc., are also contemplated within the scope of the present invention.

Figure 1 shows an exploded perspective view of a window assembly.

The window assembly 1 may comprise a window frame 2, a membrane unit 3 and a window box 4.

The window frame 2 is already attached / mounted to an aperture 6 such as a carving / cutout at the lateral portion 6 of the hull structure of the offshore structure, i.e. the lateral portion 6 of the offshore structure, such as an outer hull structure .

The window box 4 is attached / mounted to the aperture / opening 7 at the inner side 8, such as the inner lining of the structure, in the inner hull structure of the hull structure of the offshore structure, do. The window box 4 is formed such that the first side panel 4 ', the second side panel 4' ', the third side panel 4' '' and the fourth side panel 4 '' 'together form a rectangle 4 ", 4 ", 4 " " " may comprise at least one other side panel 4 ', 4 " Are connected to one another to form a window box 4. In Figure 1, the side panels 4 ', 4 ", 4 "' and 4 " 4 ", 4 ", 4 " ") may not be straight, while the panels 4 ' The side panels 4 ', 4 ", 4 "' and 4 " " are connected to one another by means of a connecting means such as, for example, an adhesive or bolts or screws. If an angle bracket is used, 4 ", 4 " ', 4 "' " by stamping.

Accordingly, the membrane unit 3 connects the window frame 2 and the window box 4 together. The membrane unit 3 thus forms an interface between the window frame 2 and the window box 4 so that the membrane unit 3 can be removed from the inner space 10 of the window assembly by the hull structure And the space 9 between the inside portion 8 and the outside portion 6 of the housing 10 is separated.

The membrane unit 3 may comprise a plurality of membranes. 1, the membrane unit 3 comprises a first membrane 3 ', a second membrane 3' ', a third membrane 3' '', a fourth membrane 3 '' ' As shown in FIG. As for the window box 4, other shapes are possible. Although the membranes 3 ', 3' ', 3' ', 3' '' are shown as planar, other shapes, such as nonplanar, curved, etc., are possible.

The membrane unit 3 may comprise various materials. The membrane unit 3 may comprise a material which may facilitate the attenuation of the level of sound passing through the membrane unit 3 and / or may have refractory properties and / (6) and the inner side (8). The material prevents thermal coupling, i.e., reduces heat exchange through the membrane unit 3 between the space 9 and the internal volume 10. Thus, the membrane unit 3 comprises a sandwich panel, such as a sandwich construction of aluminum and / or aluminum plate / panel or aluminum composite material (e.g. Dibond®). Applying the sandwich of the aluminum panel will provide a membrane unit 3 that can attenuate the level of sound and reduce heat exchange across the membrane unit 3.

The window assembly 1 may comprise an aluminum material. As such, one or more of the window frame 2, the window box 4 and the membrane unit 3 may comprise an aluminum material, partly or wholly. Applying an aluminum material reduces the weight of the window assembly 1, for example, as compared to when steel is used. In addition, the shipping cost is reduced and it becomes easier to handle and mount the window assembly 1. The application of aluminum has the advantage that no special welding process is required, as in the case of steel. Instead, the portion containing aluminum may be joined by a joint filler. When the window assembly 1 is mounted on an offshore platform, the window frame 2 must withstand a high temperature, for example, 600 < 0 > C or more to withstand a fire, for example. In such a case, at least the outer portion of the window frame 2 may have the advantage of being able to withstand such temperature, among which steel can be used to form the window frame 2.

The side panels 4 ', 4 ", 4", 4 "'" of the window box 4 and / or the membranes 3 ', 3 ", 3" Section, and can be produced by extrusion. By manufacturing the side panels 4 ', 4 ", 4' ', 4"' 'as elongated sections, that is to say the required longer parts, window boxes 4 of various sizes can be produced. Similarly, manufacturing the membranes 3 ', 3' ', 3' ', 3' '' in elongated sections, ie, longer and / or wider than necessary requires that the membrane unit 3 be manufactured in various dimensions . Thus, the fabrication of the side panels 4 ', 4 ", 4' ', 4"' and / or the membranes 3 ', 3 ", 3" Deferred and transported to the site of the production facility or offshore structure.

The inner surface (12) of the inner side (8) of the hull structure and the inner surface (12) of the window assembly (1) are provided in order to ensure a firm attachment between the window box (4) and the inner side (8) A window box sealing portion 11 is applied between the first and second openings 4 and can enter the inside of the offshore structure. Similarly, a window frame seal (not shown) is applied between the outer surface 13 of the outer portion 6 of the hull structure and the window frame 2 to achieve a sufficient attachment and sealing condition.

A first membrane seal 14 and a second membrane seal 15 may be applied between the membrane unit 3 and the window box 4 and between the membrane unit 3 and the window frame 2, respectively. The first membrane seal 14 and the second membrane seal 15 allow sufficient adhesion between the membrane unit 3 and the window box 4 and between the membrane unit 3 and the window frame 2, / Harmful gas from bypassing the membrane unit 3 and from the space 9 between the inner part 8 and the outer part 6 of the hull structure to the inner volume 10 of the membrane unit 3 prevent.

Means for mounting / maintaining the blinds may be provided on the inner surface 16 of the window box 4. The means may include a rail for guiding the blind itself.

Fig. 2 is a front view of the assembled window box 4. Fig. The window box 4 includes a first side panel 4 ', a second side panel 4', a third side panel 4 '', and a fourth side panel 4 '' ' . The window box 4 may support a window (not shown) in a space 17 formed by the side panels 4 ', 4 ", 4' ', 4"'. The window may comprise a glass that can reduce the level of sound passing through the membrane unit 3 from the environment of the offshore structure to the interior of the offshore structure. The window, including the heat resistant coating, prevents the interior of the marine structure from reaching a higher temperature than required.

Fig. 3 is a front view of the assembled window frame 2. Fig. The window frame 2 may have a rectangular shape and the window frame 2 may include a first frame portion 2 ', a second frame portion 2', and a third frame portion 2 '"), and a fourth frame portion 2 " ". The window frame 2 can be shipped as separate frame parts 2 ', 2' ', 2' ', 2' '' like the window box 4 and the membrane unit 3, Reducing shipping costs and improving logistics at the construction site will reduce shipping costs. However, the window frame 2 can be manufactured integrally.

The outer window 18 may be mounted to the window frame 2. The outer window 18 may comprise a glass material. The outer window 18 may comprise a sandwich structure comprising, for example, glass, polyvinyl butyral (pvb), air and glass, and may be a refractory material, and may be an inflow from the periphery of the offshore structure into the interior of the offshore structure Can be attenuated.

Figure 4 shows a side view of the assembled window assembly 1. The window assembly 1 is shown as including the window box 4 and the window frame 2. [ The window frame 2 includes an outer window 18 which is attached to the window frame 2 as a plurality of bolts 19 and nuts 20 using the attachment means shown in Fig. / RTI > The membrane unit 3 is attached to the window frame 2 by the attachment means 21 of the window frame 2 and attached to the window box 4 by the attachment means 22 of the window box 4 . Accordingly, the membrane unit 3 is shown as connecting the window frame 2 and the window box 4.

5 is a top view of a window assembly 1 assembled and mounted to an offshore structure. The outer portion 6 of the hull structure is shown as including an aperture / opening 5, such as a carving / cutout 5. In Fig. 5, the aperture / opening 5 is shown as being formed by the beam structure 23 of the outer side 6. The inner side 8 of the hull structure (ocean structure) is shown to include an aperture / opening 7 for receiving the window box 4 of the window assembly 1. The outer portion 6 of the hull structure separates the periphery 24 of the offshore structure from the space 9 between the inner portion 8 and the outer portion 6 of the hull structure. The inner portion 8 of the hull structure separates the interior 25 of the offshore structure from the space 9 between the inner portion 8 and the outer portion 6 of the hull structure.

4, the window frame 2 and the window box 4 may each comprise attachment means 21, 22 for removably receiving the membrane unit 3. The distance between the window frame 2 and the window box 4 can then be adjusted / adjusted such that, for example, a better sound reduction condition emerges, new elements are found which lead to better sound reduction, When other features such as the installation of the controller are required.

The attenuation of the sound can be performed by the window 18 and / or the window installed in the window box 4, and / or the membrane unit 3. The membrane unit 3 may comprise a plurality of holes that pass through the on-going or blinds for additional attenuation of the sound level through the window assembly 1. The hole may have a diameter of 0.1 mm, but may have a diameter of less than 1 mm or less than 5 mm. A porous material such as a rockwool may be disposed in the space 9 and thus disposed on the outer surface 26 of the membrane unit 3 for additional damping.

Fig. 6 is an enlarged partial cross-sectional view of part A of Fig.

In Figure 6, the mounting means 22 of the window box 4 is shown releasably receiving the membrane unit 3. The attachment means 22 comprises a first arm 27 for receiving / coupling the membrane unit 3 or the membranes 3 ', 3 ", 3"', 3 "'of the membrane unit 3, 2 arm 28. As shown in FIG. At least a portion of the extension of the arms 27, 28 may be tightly coupled to the membrane unit 3. In Figure 6, the arms 27, 28 are shown to be tightly coupled with the membrane unit 3 over a distance d2. However, an additional distance d3 can be fitted to the membrane unit 3 if necessary, which facilitates adjustment of the distance d1 between the window frame 2 and the window box 4.

Fig. 7 is an enlarged partial cross-sectional view of part B in Fig.

In Fig. 7, the attachment means 21 of the window frame 2 are shown as releasably receiving the membrane unit 3. The attachment means 21 comprises a first arm 29 for receiving / connecting the membranes 3 ', 3 ", 3' ', 3"' of the membrane unit 3 or the membrane unit 3, And an arm (30). At least a part of the extension of the arms (29, 30) is fastened to the membrane unit (3). 7, the arms 29, 30 are shown tightly coupled to the membrane unit 3 over a distance d4. However, this distance d4 can be reduced in order to facilitate adjustment of the distance d1 between the window frame 2 and the window box 4.

Variations and combinations of the above principles and designs are contemplated within the scope of the present invention.

1: window assembly
2: window frame
3: Membrane unit
4: Window box
5: aperture
6: lateral side

Claims (10)

A window assembly (1) mounted to an aperture (5) of an offshore structure,
- a window frame (2) attached to the lateral part (6) of the offshore structure;
- a window box (4) attached to the inside part (8) of the offshore structure; And
- a membrane unit (3) connecting said window frame (2) to said window box (4)
Characterized in that the window frame (2), the window box (4) and the membrane unit (3) are three separate elements. The method according to claim 1,
Characterized in that the window frame (2) and the window box (4) each comprise attachment means (21, 22) for releasably receiving the membrane unit (3). 3. The method according to claim 1 or 2,
The window box 4 comprises a plurality of side panels 4 ', 4 ", 4", 4 "', each side panel 4 ', 4", 4 " Is connected to at least one other side panel (4 ', 4 ", 4", 4 "') so that the side panels (4 ', 4", 4 " So as to form a box (4). 4. The method according to any one of claims 1 to 3,
Characterized in that the membrane unit (3) comprises a plurality of membranes (3 ', 3'',3'',3'''). 5. The method of claim 4,
Each membrane 3 ', 3 ", 3'',3''' is disposed adjacent to at least one other membrane 3 ', 3", 3'', 3 " , 3 ", 3 ", 3 "") form a closed structure which forms an internal volume of the window assembly (2) when connecting the window frame (2) to the window box (4) One). 6. The method according to any one of claims 1 to 5,
Characterized in that the attachment means (21,22) adjust the distance between the window box (4) and the window frame (2). 7. The method according to any one of claims 1 to 6,
The attachment means 21,22 comprise a first arm 27,29 and a second arm 28,30 adapted to receive / connect the membranes 3 ', 3 ", 3 & (1). ≪ / RTI > 8. The method according to any one of claims 1 to 7,
The window assembly 1 attenuates the level of sound passing through the window assembly 1 and / or comprises a refractory material and / or the outer side 6 and the inner side 8 of the marine structure, To provide a hermetic seal therebetween. 9. The method according to any one of claims 1 to 8,
Characterized in that the membrane unit (3) attenuates the level of sound passing through the inner volume of the window assembly (1). A method of mounting a window assembly (1) in an aperture (5) of an offshore structure,
- providing a window frame (2), a window box (4) and a membrane unit (3);
- mounting the window frame (2) in the aperture (5);
- attaching the window frame (2) to the lateral part (6) of the offshore structure;
- connecting said membrane unit (3) to said window frame (2) using attachment means of a window frame (2) releasably receiving the membrane unit (3);
- connecting the window box (4) to the membrane unit (3) using attachment means of the window box (4) releasably receiving the membrane unit (3); And
- attaching the window box (4) to the inner side (8) of the offshore structure.

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