EP3568345A1 - Verfahren zur bestimmung von hydrodynamischen koeffizienten bei unterseebooten - Google Patents
Verfahren zur bestimmung von hydrodynamischen koeffizienten bei unterseebootenInfo
- Publication number
- EP3568345A1 EP3568345A1 EP17818505.4A EP17818505A EP3568345A1 EP 3568345 A1 EP3568345 A1 EP 3568345A1 EP 17818505 A EP17818505 A EP 17818505A EP 3568345 A1 EP3568345 A1 EP 3568345A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- trim
- depth
- acceleration
- speed
- free
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000001133 acceleration Effects 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000002474 experimental method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
- B63G8/00—Underwater vessels, e.g. submarines; Equipment specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B79/00—Monitoring properties or operating parameters of vessels in operation
- B63B79/30—Monitoring properties or operating parameters of vessels in operation for diagnosing, testing or predicting the integrity or performance of vessels
Definitions
- the invention relates to a method for determining hydrodynamic coefficients in submarines.
- the z-direction is the direction perpendicular to the longitudinal axis of the submarine, with positive values pointing downwards.
- the y-direction is the direction transverse to the longitudinal axis of the submarine, with positive values pointing to starboard.
- hydrodynamic coefficients can be theoretically calculated or experimentally determined in a model experiment. However, this is extremely complex and can not be performed precisely for the current loading situation of the submarine, so that you have to work with approximate values. The exact knowledge of these parameters allows a precise prediction of the boat behavior. Thus, maneuvers can be controlled very precisely if these parameters are known exactly. The calculated or model hydrodynamic coefficients are therefore generally too inaccurate for accurate boat behavior prediction. Therefore, the hydrodynamic coefficients are usually verified or corrected by evaluating large-scale execution experiments, but the large-scale implementation tests used today represent only elaborate approximation methods.
- the object of the invention is to provide a method with which these hydrodynamic coefficients on a real submarine can be detected or determined simply and precisely by measurement.
- the method according to the invention for determining hydrodynamic coefficients in submarines with an anterior depth rudder and a rear rudder comprises the following steps:
- steps a) to I) are carried out in any order.
- the step m) is carried out after the steps a) to I).
- a tamping angle ⁇ of the submarine of, for example, is particularly preferred
- the ramming angle is the angle between the longitudinal axis of the submarine and the projection of the longitudinal axis of the submarine into the plane and thus reflects the inclination in the z-direction.
- Under an oblique keel is a particular pitch angle ⁇ of the submarine of
- Acceleration-free travel is understood to mean an operating mode in which the boat moves at a constant speed, wherein constant is to be regarded as constant within the scope of the detection accuracy and control accuracy. Because the ride is done at a constant depth, the vertical forces, so the gravitational or the lift acceleration compensate each other so that there is no up or down.
- the various first speeds and second speeds are indicated by the index /.
- / 1 for the first first speed and the first second speed and for the second first speed and the second second speed.
- the measured values are evaluated separately for journeys at even keel and at oblique keel separately.
- the measured values for the trips are evaluated with a flat keel.
- regression lines give as limits for the rear depth rudder angle and front depth rudder angle for the so-called buoyancy-free and torque-free ride. Only the limit values are evaluated here.
- the straight line is not relevant, the decision is that for zero and thus for ⁇ ⁇ £ against infinitely extrapolated limit.
- the x-coordinates of trim and control cells and rudder position are known from boat geometry. By subtracting the values determined from the steps a) to d) at different trim and weight states, the rudder angle is measured according to FIG.
- trim and weight states of the submarine characterized by the index k and arise as averages of the values.
- the determination takes place from the measured data by means of multilinear regression using the variables already known from a).
- first speeds in particular a total of five to eight first speeds, particularly preferably six first speeds.
- the first velocities are selected from the range of 4 kn to 25 kn, preferably from the range of 5 kn to 20 kn, more preferably from the range of 6 kn to 15 kn.
- the second velocities are selected from the range of 4 kn to 25 kn, preferably from the range of 5 kn to 20 kn, more preferably from the range of 6 kn to 14 kn.
- an angle of + 15 ° to + 25 °, in particular of + 18 ° to + 22 ° is selected as the first front rudder angle and that as the second front rudder angle an angle of - 15 ° to - 25 °, chosen in particular from -18 ° to -22 °.
- the method is carried out such that the depth is chosen such that at least 25 m, preferably at least 50 m, more preferably at least the length of the submarine, water above the submarine and at least 25 m, preferably at least 50 m Most preferably, at least the length of the submarine is water under the submarine.
- This method determines the hydrodynamic coefficients in the uninfluenced deep water area.
- the method is carried out such that the depth is chosen so that less than 25 m, preferably less than 15 m, water above the submarine and at least 25 m, preferably at least 50 m, most preferably at least the length of the submarine, are water under the submarine.
- This method determines the hydrodynamic coefficients in the near-surface region and is important, for example, for snorkeling. This method is preferably used in addition to the determination in the uninfluenced deep water area.
- the method is carried out such that the depth is chosen such that at least 25 m, preferably at least 50 m, more preferably at least the length of the submarine, water above the submarine and less than 25 m, preferably less than 15 m, water are under the submarine.
- This method determines the hydrodynamic coefficients in the baseline area and is important, for example, for submerged cruises in shallow water. This method is preferably used in addition to the determination in the uninfluenced deep water area.
- the speed u of the submarine, the front depth rudder angle of the submarine, respectively are determined during the acceleration-free rides rear depth rudder angle the volume change of the trim tanks and the
- the rotational speed n of the screw and the trim angle ⁇ are additionally detected during the acceleration-free travel.
- the roll angle ⁇ and volume change of the ballast tank A Ver are additionally detected during the acceleration-free journeys.
- the weight distribution in the submarine is kept constant until the targeted changes during the process. In particular, care is taken to ensure that the crew does not change their position, as this leads to undetectable mass shifts and thus reduces the measurement accuracy of the method.
- step m) the coefficients the filling volume of the control cell and the Trim cells fillings and and the rudder angles and for buoyancy and
- the first first trim layer and the second first trim layer are selected differently by 500 kNm ⁇ 50 kNm.
- a first second trim layer and a second second trim layer are selected in steps e) and I), wherein the first second trim layer and the second second trim layer are selected differently by 1000 kNm ⁇ 100 kNm.
- step m in step m) the coefficients and and the stability lever arm z GB .
- Fig. 1 the angles and sizes are shown using the example of a submarine with a rudder.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Navigation (AREA)
- Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017200468.1A DE102017200468A1 (de) | 2017-01-12 | 2017-01-12 | Verfahren zur Bestimmung von hydrodynamischen Koeffizienten bei Unterseebooten |
PCT/EP2017/082510 WO2018130360A1 (de) | 2017-01-12 | 2017-12-13 | Verfahren zur bestimmung von hydrodynamischen koeffizienten bei unterseebooten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3568345A1 true EP3568345A1 (de) | 2019-11-20 |
EP3568345B1 EP3568345B1 (de) | 2021-04-07 |
Family
ID=60788583
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17818505.4A Active EP3568345B1 (de) | 2017-01-12 | 2017-12-13 | Verfahren zur bestimmung von hydrodynamischen koeffizienten bei unterseebooten |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3568345B1 (de) |
DE (1) | DE102017200468A1 (de) |
ES (1) | ES2878052T3 (de) |
WO (1) | WO2018130360A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018218231B3 (de) | 2018-10-24 | 2020-02-13 | Thyssenkrupp Ag | Verfahren zum Navigieren eines Unterwasserfahrzeugs und Unterwasserfahrzeug |
CN109766569A (zh) * | 2018-11-23 | 2019-05-17 | 中国船舶重工集团公司第七一九研究所 | 潜艇运动模型简化方法及装置 |
CN111862722B (zh) * | 2020-09-11 | 2022-03-04 | 中国人民解放军海军工程大学 | 一种潜艇操纵运动示教系统 |
CN112487555B (zh) * | 2020-11-29 | 2024-01-09 | 西北工业大学 | 一种水空两栖潜水器无量纲阻力系数辨识方法 |
CN113514224B (zh) * | 2021-05-26 | 2022-10-04 | 浙江大学 | 一种高压海底电缆水动力系数测量装置及其测量方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3052120A (en) * | 1959-05-29 | 1962-09-04 | Goodman Alex | Planar motion mechanism and system |
JPS6343896A (ja) * | 1986-08-11 | 1988-02-24 | Nec Corp | 潜水船自動重量ツリム制御装置 |
JP2004334714A (ja) * | 2003-05-09 | 2004-11-25 | Yamaha Motor Co Ltd | パラメータ最適化方法、パラメータ最適化装置、パラメータ最適化プログラム、及び、航走制御装置 |
-
2017
- 2017-01-12 DE DE102017200468.1A patent/DE102017200468A1/de not_active Withdrawn
- 2017-12-13 WO PCT/EP2017/082510 patent/WO2018130360A1/de unknown
- 2017-12-13 ES ES17818505T patent/ES2878052T3/es active Active
- 2017-12-13 EP EP17818505.4A patent/EP3568345B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
EP3568345B1 (de) | 2021-04-07 |
ES2878052T3 (es) | 2021-11-18 |
DE102017200468A1 (de) | 2018-07-12 |
WO2018130360A1 (de) | 2018-07-19 |
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