Patent Grant
10494059
The present invention relates to a system for controlling an impact load resulting from a fluid under an internal/external force in a specific environment interworking with environmental external monitoring. More specifically, the present invention relates to a system for controlling an impact load resulting from a fluid under an internal/external force in a specific environment applicable to fluid existing in the river, lake, sea and transportation devices, etc., which can minimize impact load of a fluid under internal/external force including sloshing, slamming, and ice collision, in consideration of the environmental external force and movement of maritime structure or transportation devices.
In general, in order to transport fluid cargos, various forms of vessels are manufactured.
For example, in order to transport fluid or fuel such as LNG, LPG, hydrate, crude oil, etc., transportation devices are manufactured reflecting the characteristic of each transportation material and effect of internal/external force in the environment. In this regard, transportation devices or fuel storage tanks of a particular shape are applied so as to seal or keep the transportation material at extremely low temperature, low temperature or high temperature, etc. in the transportation device.
When manufacturing such transportation devices or fuel storage tanks, one of the important load conditions is sloshing.
Here, sloshing means a behavior of the fluid causing strong impact to an inner wall of a transportation device while radically shaking the fluid having a free surface by continuously receiving kinetic energy due to the movement of transportation devices such as a hull. The sloshing problem needs to be considered from an initial stage of manufacturing a maritime structure or transportation device.
Thus, the maritime structure or transportation device is designed to minimize the sloshing by a fluid while sufficiently standing the expected sloshing load.
Also, during this process, in order to avoid sloshing load which is difficult to stand structurally, ship owners had to accept conditional shipping conditions limiting the cargo load.
Nevertheless, due to the uncertainty of the sloshing load, there are many problems relating to damage on unexpected cargo holds.
In order to solve the above, Korean Patent No. 1043622 discloses a device for inhibiting sloshing including a plurality of buoyant bodies floating on the surface of liquid cargo.
However, since the conventional technologies cannot block sloshing occurring inside liquid cargo, the sloshing load occurring on the surface of the liquid cargo is very irregular, and the sloshing load is too big, and thus there is a limitation in blocking sloshing.
Thus, a system for controlling an impact load resulting from a fluid under an internal/external force in a specific environment applicable to fluid existing in the river, sea or transportation means, which can minimize the impact load resulting from a fluid under an internal/external force including sloshing, slamming, or ice collision, in consideration of the effect of internal/external force in a specific environment such as inside a transportation device or natural environment, is required.
The task of an embodiment of the prevent invention is to provide a system for controlling an impact load resulting from a fluid under an internal/external force in a specific environment, which can efficiently attenuate impact load including sloshing, slamming, and ice collision against fluid under an internal/external force while detecting impact fluid including sloshing, slamming, and ice collision against fluid under an internal/external force in a specific environment such as natural environments such as river, lake, sea, etc. or sealed transportation means such as a container, fuel tank, etc.
Another task of the present invention is to provide a system for controlling an impact load resulting from a fluid under an internal/external force in a specific environment, which allows a simple and quick process of the work of connecting a plurality of mat members and maintenance thereof through a detachable member fixed to the cover of the mat member.
The system for controlling an impact load resulting from a fluid under an internal/external force in a specific environment according to an embodiment of the present invention includes a floating means 300 arranged horizontally inside a predetermined amount of fluid 200 existing in an open space or in a space having a sealed interior; a position adjustment means 400 vertically connected to the floating means 300 and arranged in a preset position inside the fluid; a sensing means 500 selectively installed inside the fluid 200, on the floating means 300, on the position adjustment means 400, or on a structure positioned in the periphery to sense a physical change of at least one preset measurement object; and a control means 600 for predicting/monitoring and predicting/controlling fluid dynamics-related environment internal/external forces, hull stress, six-degree-of-freedom movements, and positions in connection with a transportation means 100 or a maritime structure, on which the floating means 300, the position adjustment means 400, and the sensing means 500 are installed, using the physical change value related to the measurement object transmitted from the sensing means 500.
According to a system for controlling an impact load resulting from a fluid under an internal/external force in a specific environment according to the present invention, the impact load and boil off gas (BOG) of the fluid can be minimized while efficiently sensing the impact load of various fluids including sloshing, slamming, ice collision, etc. by arranging the mat member inside the fluid varying the specific gravity of the floating body installed vertical to the mat member.
Also, the present invention can allow a simple and quick process of the work of connecting a plurality of mat members and maintenance thereof through a detachable member fixed to the cover of a mat member, and thus has an effect of improving the convenience in workability as compared to the conventional method which fixed the mat member using a wire or rope.
11A, 11B, 11C and 12 are perspective views and cross-sectional views illustrating a mat member of a floating means applied to the system for controlling an impact load resulting from fluid under internal/external force in a specific environment according to a preferable embodiment of the present invention;
Hereinafter, the present invention will be described in detail with reference to the drawings.
In the following description, usage of suffixes such as “module” and “part” used for referring to elements is given merely to facilitate explanation of the present invention, and the “module” and “part” may be used interchangeably.
Further, hereinafter, exemplary embodiments of the present invention are described with reference to the accompanying drawings and contents disclosed therein, however, the present invention is not limited thereto or restricted thereby.
The terms used in this specification were selected to include current, widely-used, general terms, in consideration of the functions of the present invention. However, the terms may represent different meanings according to the intentions of the skilled person in the art or according to customary usage, the appearance of new technology, etc. In certain cases, a term may be one that was arbitrarily established by the applicant. In such cases, the meaning of the term will be defined in the relevant portion of the detailed description. As such, the terms used in the specification are not to be defined simply by the name of the terms but are to be defined based on the meanings of the terms as well as the overall description of the present invention.
As shown in
The system for sensing an impact load may be applied to a liquefied natural gas carrier (LNGC), a floating-LNG (F-LNG), a floating storage regasification unit (FSRU), an LNG fueled vessel (LNGFV), an LNG bunkering vessel (LNGBV), an LNG bunkering terminal (LNGBT), etc.
Also, the fluid 200 in a preferable embodiment of the present invention means a condition where raw materials in gas state, liquid state and ice state are mixed in an unspecified form. This may apply in the same manner to all cases where the fluid is in gas state and liquid state, or where fluid ice including gas or other particles is mixed.
Referring to
In this case, preferably, the first floating body 410 of the position adjustment means 400 is formed to have a specific gravity smaller than the fluid 200 and the floating means 300, thus having the highest buoyancy, the second floating body 420 of the position adjustment means 400 is formed to have a specific gravity greater than the fluid 200 and the floating means 300, thus having the smallest buoyancy, and the floating means 300 is formed to have a specific gravity greater than the fluid 200 and the first floating body 410 and smaller than the second floating body 420, thus having a buoyancy therebetween.
As shown in
Also, the floating member 420a may be formed of a plurality of minute holes in the external surface, or formed of an uneven pattern on the side surface in some cases.
In some cases, as shown in
Here, the curtain member 420b may be formed of one single member arranged to surround along a side circumference of the floating means 300, and in some cases, the curtain member 420b may be formed of a plurality of members arranged to surround along a side circumference of the floating means 300.
Here, when there are a plurality of curtain members 420b, adjacent curtain members may be arranged at predetermined intervals.
Also, a surface of the curtain member 420b may be formed of a plurality of holes where the fluid may float around.
Also, the curtain member 420b may be fixed or locked to the floating means 300 using at least one of an adhesive and a locking member.
Alternatively, as shown in
That is, the second floating body 420 of the position adjustment means 400 may be configured to have a floating member 420a locked at an end of the curtain member 420b having a curtain shape.
Referring to
Here, the mat member 310 may be formed using specific materials such as a phenol resin, a melamine resin, and a synthetic resin thereof.
As such, as shown in
Here, the first mat member 311 and the second mat member 312 may be formed in different shapes or in the same shape.
In some cases, adjacent first mat members 311 may be formed in different shapes or in the same shape, and adjacent second mat members 312 may be formed in different shapes or in the same shape.
For example, as shown in
Here, the first mat member 311 and the second mat member 312 may have the same shape.
As another example, as shown in
Here, the first mat member 311 and the second mat member 312 may have different shapes.
As another example, as shown in
As shown in
Here, as shown in
11A, 11B, 11C and 12 are perspective views and cross-sectional views illustrating a mat member of a floating means applied to the system for controlling an impact load resulting from fluid under internal/external force in a specific environment according to a preferable embodiment of the present invention.
Referring to
As shown in
Here, the body part 301 may be made of a material having a predetermined specific gravity, and for example, aluminum or aluminum alloy may be used.
Next, as shown in
Here, as shown in
In this case, the body part 301 may be formed using a foam member, and the buoyant body 305 may use aluminum or aluminum alloy having a predetermined specific gravity.
Next, as shown in
Next, as shown in
Also, as shown in
Thus, as shown in
Meanwhile, as shown in
Meanwhile, preferably, a predetermined space 309 is formed between the body part 301 and the cover 308, and the position of the space 309 may be controlled so that the floating means 300 floats at a predetermined depth.
Also, as shown in
Referring to
Here, the position adjustment means 400 arranged in the lower direction of the floating means 300 may be arranged at a predetermined interval from the bottom surface of the transportation means. In this case, the position adjustment means 400 may have a specific gravity greater than the fluid 200.
Also, the position adjustment means 400 arranged in the upper direction of the floating means 300 may be arranged at a predetermined interval from the surface of the fluid 200. In this case, the position adjustment means 400 may have a specific gravity smaller than the fluid 200.
When there are a plurality of position adjustment means 400, the plurality of position adjustment means may be connected to one another by a connecting member 430.
For example, with regard to the position adjustment means 400, when a first floating member 401, a second floating member 402, and a third floating member 403 are arranged in order in a downward direction from the surface 201 of the fluid 200, the first floating member 401, the second floating member 402, and the third floating member 403 are formed to have different specific gravity.
For example, the first floating member 401 has the smallest specific gravity, the third floating member 403 has the greatest specific gravity, and the second floating member 402 is formed to have a specific gravity greater than the first floating member 401 and smaller than the third floating member 403.
In some cases, when there are a plurality of position adjustment means, as the position adjustment means gets farther from the floating means 300, the specific gravity of the position adjustment means 400 may get smaller gradually.
Also, as shown in
For example, the first floating member 401 may be the largest, the third floating member 403 may be the smallest, and the second floating member 402 may be smaller than the first floating member 401 and larger than the third floating member 403.
For example, the first floating inlet 103 member 401 may be larger or smaller than the second floating member 402.
In some cases, when there are a plurality of position adjustment means 400, as the position adjustment means gets farther from the floating means 300, the size of the position adjustment means 400 may get smaller or larger gradually.
In some cases, as shown in
As such, the position adjustment means 400 may be produced in various shapes according to their size and specific gravity.
Referring to
Here, when there are a plurality of position adjustment means 400, the plurality of position adjustment means 400 are connected by a locking member 430.
For example, as shown in
In some cases, as shown in
For example, interval d1 between the first floating member 401 and the second floating member 402 may be smaller or larger than interval d2 between the second floating member 402 and the third floating member 403.
In this regard, as the area where sloshing occurs varies according to the depth of the fluid 200, sloshing may be minimized by arranging the position adjustment means 400 only in an area with high sloshing according to the depth of the fluid by controlling the interval between the position adjustment means 400.
Referring to
Here, when there are a plurality of position adjustment means 400, the plurality of position adjustment means 400 may be connected by a locking member 430.
For example, as shown in
In this case, sloshing may be minimized by arranging the position adjustment means 400 to be in contact with each other to be arranged in groups having a large area when sloshing occurring in the fluid occurs over a broad area in the depth direction.
In this case, as shown in
Referring to
As shown in
Next, as shown in
Here, as shown in
Here, the body part 411 may be a foam member, and the buoyant body 413 may be made of a material having a predetermined specific gravity such as aluminum or aluminum alloy.
Next, as shown in
These minute holes 414 may minimize the sloshing of the fluid by increasing the specific gravity.
Next, as shown in
Here, as shown in
Thus, as shown in
Meanwhile, as shown in
Also, as shown in
Referring to
Here, as shown in
In some cases, as shown in
Here, when there are a plurality of members of the position adjustment means 400 having a curtain shape, the adjacent position adjustment means 400 may be arranged at a predetermined interval d.
Also, as shown in
Here, the position adjustment means 400 having a curtain shape may be connected to the mat member 310 by a connecting member 430.
Also, as shown in
Here, the position adjustment means 400 having a curtain shape may include at least one of phenol resin, melamine resin, and synthetic resin thereof.
As shown in
Here, the position adjustment means 400 having a curtain shape may be connected to a mat member 310 using at least one of an adhesive 431 and a locking member 430.
As shown in
In some cases, the connecting member 430 may be locked to a lower surface of the mat member 310, and the other end may be locked to an end of the position adjustment means 400 having a curtain shape.
As shown in
Here, a bumper plate 150 controlling the movement of the impact load of the fluid may be further arranged in an inner wall of the transportation means 100, and a sensing means 500 sensing the movement of the impact load of the fluid may be further arranged in the bumper plate 150.
Here, the acceleration sensor 510 is a sensor generating power when an object with mass receives acceleration and measuring the change in speed (acceleration) of at least one axis. It may measure dynamic power such as acceleration, vibration, impact, etc. of the floating means 300, position adjustment means 400, fluid 200 and bumper plate 150, etc.
Also, the inertia sensor 520 is a sensor detecting inertial force acting on an inertial object by the acceleration applied. It may measure the acceleration, speed, direction, distance, etc. of the measurement object, which is a moving object.
Next, the vibration sensor 530 is a sensor detecting the vibration of mechanical structures and fluid. It may measure vibration generated in the floating means 300, position adjustment means 400, fluid 200, and bumper plate 150, etc., and measure the vibration generated by the impact between the floating means 300 and transportation means 100 such as a container, etc.
Next, the acoustic sensor 540 is a sensor sensing the conversion of particle motion generated by an elastic wave into electric signals. It may receive an acoustic emission wave and convert it into an acoustic emission signal, and detect minute crevice and crack generated in the floating means 300, position adjustment means 400, fluid 200, and bumper plate 150, etc.
The temperature sensor 550 is a sensor detecting the temperature of gas, fluid and solid. It may measure the temperature varying in the floating means 300, position adjustment means 400, fluid 200, bumper plate 150, transportation means 100, etc.
Also, the pressure sensor 560 is a sensor detecting the pressure of gas or fluid. It is a sensor using heat conductivity of molecule density in addition to displacement or deformation. It may measure the change in pressure according to the capacity of fluid 200 within transportation means 100 such as a container, etc.
Next, the shape sensor 570 is a shape recognizing sensor confirming the presence, position and shape of an object. It may detect the presence, position and shape of the floating means 300, position adjustment means 400, fluid 200, bumper plate 150, transportation means 100, etc.
As such, the present invention may precisely measure the predicted occurrence of impact load of the fluid using various sensing means 500.
Referring to
Here, the bumper plate 150 is fixed to a fixed axis connected to the inner wall 120 of the transportation means 100, enabling rotation movement in the up/down/left/right direction so as to change the moving direction of the fluid 200.
That is, as shown in
In this case, the surface of the bumper plate 150 may be inclined in a predetermined angle with respect to the surface of the inner wall 120 of the transportation means 100.
For example, when a plurality of bumper plates 150 are arranged in the height direction of the transportation means 100, the angle between the surface of the bumper plate 150 and the inner wall 120 surface of the transportation means 100 may vary in the height direction of the transpiration means 100.
Also, the surface of the bumper plate 150 may be irregular.
As such, the reason for arranging the bumper plate 150 is to attenuate the sloshing of the fluid 200 facing the inner wall 120 of the transportation means 100 with the irregular surface of the bumper plate 150, and to minimize the sloshing by offsetting the fluids 200 having different moving directions by changing the moving direction of the fluid 200 to be irregular.
Referring to
Here, as shown in
In this case, the surface of the bumper plate 150 may be formed of an irregular uneven pattern 150a.
Also, the surface of the bumper plate 150 may be inclined in a predetermined angle with respect to the inner wall surface of the transportation means 100.
In some cases, as shown in
Here, the bumper plate 150 may be controlled so that the surface facing the inner wall surface of the transportation means 100 is parallel, and the surface opposite to the inner wall surface of the transportation means 100 is inclined at a predetermined angle. That is, the bumper plate 150 is installed to be controllable in a direction selected from up, down, left and right directions by the worker, so as to effectively disperse the power applied to the transportation means 100 or maritime structure by passive fluid dynamics or motion generation of sloshing generated by being set in the up/down direction or left/right direction.
First, referring to
Here, the look-up table records time-serial data by the year, and the look-up table may be modified by comparing the time-serial data by the year accumulated until the previous year with the data measured through the sensing means 500.
Hereinafter, the operation of the control means is explained referring to
First, the sensor measuring part 610 receives change in acceleration, inertia, vibration, sound, temperature, pressure, shape, strain, etc. of the sensed object sensed by the sensing means 500 in the fluid 200, floating means 300 and position adjustment means 400 and converts it into digital signal that may be measured (S110, S120).
The processor part for analysis and comparison algorithm 620 structurally interprets, compares and analyzes the impact load resulting from non-periodic coupled energy and response thereto occurring in the fluid 200, floating means 300 and position adjustment means 400, transportation means 100 or maritime structure by using data measured by the sensing means 500 transmitted to the sensor measuring part 610 (S130).
Next, the processor part for analysis and comparison algorithm 620 makes a look-up table with FEA (Finite Element Analysis) based simulation reflecting empirical data measured in real-time at the database 630 by making an algorithm of the analyzed result by using comparative algorithm and predictive control signal algorithm (S140, S150).
Here, making an algorithm in S140 includes backing up FEA-based simulation reflecting empirical data measured in real-time (S141), conducting FEA-based simulation storing and default setting (S143), making a database for situation recognition of external conditions of the environment and measurement results (S145), generating and storing modified log (S147), and generating report and backing up electronic file (S149).
Also, the predictive control signal algorithm in S150 includes backing up the predictive control simulation reflecting empirical data (S151), conducting FEA-based simulation storing and default setting (S153), making a database for situation recognition of driving the predictive control device (S155), generating and storing modified log (S157), and generating report and backing up electronic file (S159).
The remote monitoring and controlling part 640 remotely-controls the driving of the control target device (for example, ballast tank, tensioner, thruster, rudder, etc.) in the transportation means 100 by using a predictive control signal algorithm stored in the database 630 (S170).
Thus, the remote monitoring and controlling part 650 may control the posture or navigation path of the transportation means 100 or maritime structure using data on the predicted response of the transportation means 100 or maritime structure (S180).
The system for controlling an impact load resulting from a fluid under an internal/external force in a specific environment according to the present invention as explained in the above can minimize the impact load and boil off gas (BOG) of the fluid while efficiently sensing the impact load of various fluids including sloshing, slamming, ice collision, etc., and allow a simple and quick process of the work of connecting a plurality of mat members and maintenance thereof through a detachable member fixed to the cover of a mat member.
It will be apparent that, although the preferred embodiments have been shown and described above, the present specification is not limited to the above-described specific embodiments, and various modifications and variations can be made by those skilled in the art to which the present invention pertains without departing from the gist of the appended claims. Thus, it is intended that the modifications and variations should not be understood independently of the technical spirit or prospect of the present specification.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2014-0026086 | Mar 2014 | KR | national |
This is a continuation application of International Application No. PCT/KR2015/002148 filed on Mar. 5, 2015, which claims priority to Korean Application No. 10-2014-0026086 filed on Mar. 5, 2014. The applications are incorporated herein by reference.
| Number | Name | Date | Kind |
|---|---|---|---|
| 20110278305 | Chun | Nov 2011 | A1 |
| 20130112693 | Shin | May 2013 | A1 |
| 20150020604 | Lee | Jan 2015 | A1 |
| Number | Date | Country |
|---|---|---|
| 2008213886 | Sep 2008 | JP |
| 101162469 | Jul 2012 | KR |
| 20130012857 | Feb 2013 | KR |
| 20130060482 | Jun 2013 | KR |
| Entry |
|---|
| English Translation: Lee, KR 101162469 B1, dated Jul. 2012, Korean Patent Office Publication (Year: 2012). |
| English Translation: Jeon, KR 20130012857 A, dated Feb. 2013, Korean Patent Office Publication (Year: 2013). |
| English Translation: Imamura, JP 2008213886 A, dated Sep. 2008, Japanese Patent Office Publication (Year: 2008). |
| English Translation: Lee Jae Kang, KR 20130060482 A1, dated Jun. 2013, Korean Patent Office Publication (Year: 2013). |
| Number | Date | Country | |
|---|---|---|---|
| 20160229492 A1 | Aug 2016 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/KR2015/002148 | Mar 2014 | US |
| Child | 14965218 | US |
