CN205262666U - Wave slamming load measuring device - Google Patents
Wave slamming load measuring device Download PDFInfo
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- CN205262666U CN205262666U CN201520997766.1U CN201520997766U CN205262666U CN 205262666 U CN205262666 U CN 205262666U CN 201520997766 U CN201520997766 U CN 201520997766U CN 205262666 U CN205262666 U CN 205262666U
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Abstract
The utility model relates to a wave slamming load measuring device, the device is including fixed casing to and locate the internal force plate of set casing respectively and singly divide force transducer, singly divide force transducer to be a plurality of, a plurality of lists divide force transducer along the axial in the internal equipartition setting of set casing, force plate is supporting the contact that a plurality of lists divide force transducer, it is regional to be equipped with the cavity of settling force plate on the fixed casing. Compared with the prior art, the utility model discloses an atress condition of singly dividing force transducer to detect force plate comes micrometric measurement arbitrary area wave, water column to act on the slamming load on marine structure, test model surface, has advantages such as measurement accuracy height, simple to operate, with low costs, convenient operation.
Description
Technical field
The utility model relates to ocean engineering and mechanical engineering field, especially relates to a kind of wave slamming load and surveysAmount device.
Background technology
For the design of ocean engineering structure in severe sea condition, can measure accurately it under wave actionSlamming load is very crucial. In some sea area, offshore structures is the extreme environment of even meeting for 10000 years based on thousandDesign, part and General load that so extreme wave slamming produces are used as emphasis characteristic parameter conventionally, thusCan provide a slamming load aspect rationally to assess accurately the safe design of ocean engineering structure heavy to closingWant.
Up to now, also do not exist any reliable numerical forecast algorithm to measure the slamming of cleaving to offshore structuresImpact. This method of model test is still for determining the industrial practice of wave slamming on offshore structures impact.
The model test of measuring exactly wave slamming load is very challenging, to pressure sensor and cloth thereofPut and require harshness. Not only require that sensor size size is suitable, range is enough, sample rate is high, truly reflect slammingDynamic characteristic in process, more needs the resonant frequency of package unit enough large, can at utmost weaken resonant beltThe interference coming.
Chinese patent CN1458506A discloses a kind of measuring method of ocean wave load, comprises the following steps:A. be set with a rigid cylinder in ocean platform conduit appropriate location with hang; B. between rigid cylinder and conduit,Be provided with at least two group force cells along the suitable distance of its axially spaced-apart; C. force cell detects ocean wave pairThe active force of rigid cylinder, and the data that detect are passed to existing data processing equipment process. SimultaneouslyThis patent also discloses a kind of suspension type ocean wave load device for measuring force, comprise rigid cylinder, force cell andSome jockeys. This patent adopts suspension type metering system, is vulnerable to other vibration influences such as wind-force, causes surveyingAmount result is inaccurate.
Utility model content
The purpose of this utility model be exactly provide in order to overcome the defect that above-mentioned prior art exists a kind of wave bangHit load-measuring device, reaching micrometric measurement arbitrary region wave, water column acts on marine structure, test model tableThe slamming load of face.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of wave slamming load measurement mechanism comprises stationary housing, and is located at respectively the dynamometry in stationary housingPlate and single component sensor, described single component sensor is multiple, multiple single component sensors are vertically at set casingUniform setting in body, described force plate is against the contact of multiple single component sensors, and described stationary housing is provided with peacePut the hollow region of force plate.
The quantity of described single component sensor is four integral multiple.
Described stationary housing is embedded on ocean platform by built-in fitting, described force plate outer surface and ocean platformThe outer surface in region to be measured is concordant.
Described force plate outer surface is coated with the rubber film for waterproof.
Described stationary housing comprises shell, be fixed on base in shell and lid is located at the top cover of outer casing top surface, instituteStating base is hollow structure, and described force plate and single component sensor are located at respectively in the cavity of base, described hollowRegion is located on top cover.
In the cavity of described base, be provided with the holddown groove of multiple fixing single component sensors, the inwall of described holddown grooveBe provided with side direction fixed screw holes and miniature leading screw, described miniature leading screw is located in side direction fixed screw holes and in side directionUpper fixing single component sensor.
Described force plate is provided with the corresponding close-fitting groove of contact of multiple and single component sensor.
Compared with prior art, the utlity model has following advantage:
1, the utility model device detects by multiple single component sensors are set the wave slamming that force plate is subject toLoad, the uniform setting of multiple single component sensor, the single component synthetic by single component numerical value can accurately react with joint effortsWave slamming load, simple in structure, be easy to utilization and extention.
2, the utility model device is identified (under the qualification of the power that impulses hammer and sphenoid are free by the advanced standard in the worldQualification falls), can effectively capture slamming power more than 3 microsecond intervals, reflect the most real physical characteristic. LogicalCross in RAO (responseamplitudeoperator, response amplitude operator) curve and can find out, be arranged on floatingAfter formula ocean structure object model, still can ensure that response amplitude operator approaches 1 under the vibration frequency of 1000Hz, obviouslyHigher than the characteristic frequency of wave slamming, thereby avoid occurring the excessive situation of resonance dynamometry, ensure the slamming power standard measuringReally true.
3, the utility model device also can precise determination pulse water jet etc. all produce institute in slamming hydrodynamic force phenomenonsThe pressure producing, for basic research work facilitates, applied range.
4, force plate outer surface is coated with the rubber film for waterproof, and preventing affects after single component sensor water inletMeasure the accuracy of structure.
5, stationary housing adopts split-type design, and each parts closely cooperate, reliable in structure, and easy processing and fabricating,Effectively reduce manufacture difficulty and cost.
Brief description of the drawings
Fig. 1 is the explosive view of the utility model apparatus structure;
Fig. 2 is the structural representation of base;
Wherein, (2a) be the schematic perspective view of base, (2b) for the master of base looks schematic diagram; (2c) be figure (2b)Middle C-C is to cross-sectional schematic;
Fig. 3 is the power that the impulses hammer qualification test schematic diagram of the utility model device;
Fig. 4 is percussion power numerical value and the single component correlation curve figure that makes a concerted effort;
Fig. 5 is that the utility model device is arranged on the response amplitude operator curve signal obtaining after the wooden model of testFigure;
Fig. 6 is the partial enlarged drawing in Fig. 5 medium and low frequency region.
In figure: 1, force plate, 2, top cover, 3, rubber film, 4, single component sensor, 5, base, 6,Shell, 7, built-in fitting, 8, the power that impulses hammer, 9, test sphenoid, 10, cylinder groove, 11, logical line opensMouthful groove, 12, side direction fixed screw holes, 13, miniature leading screw.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated. The present embodiment is with this practicalityNew technique scheme is that prerequisite is implemented, and has provided detailed embodiment and concrete operating process, but this realityBe not limited to following embodiment with novel protection domain.
As shown in Figure 1, a kind of wave slamming load measurement mechanism comprises that stationary housing, force plate 1 and single component passSense, force plate 1 and single component sensor 4 are located at respectively in stationary housing, and single component sensor 4 is multiple, manyThe uniform setting in stationary housing vertically of individual single component sensor 4, force plate 1 is against multiple single component sensors4 contact, stationary housing is provided with the hollow region of settling force plate 1, wherein:
Single component sensor 4 is high-precision strain gauge transducer, the integral multiple that its number is four, for example 4,8 etc., the active force of each single component sensor 4 on detecting axially, the making a concerted effort of all single component sensors 4React force plate 1 and be subject to the situation of wave slamming.
Force plate 1, employing acrylic board or the material that other density is little, resonant frequency is high, can be well by itThe wave slamming power transmission being subject to is to single component sensor 4, and force plate 1 is provided with multiple and single component sensor 4The corresponding close-fitting groove of contact, both closely cooperate, and ensure in measuring process single component sensor 4 and surveyCan there is not axial slip in power plate.
Stationary housing comprises shell 6, is fixed on the base 5 in shell 6 and covers the top cover 2 that is located at shell 6 end faces,Base 5 is hollow structure, and force plate 1 and single component sensor 4 are located at respectively in the cavity of base 5, hollow areaTerritory is located on top cover 2. As shown in Figure 2, in the cavity of base 5, be provided with consolidating of multiple fixing single component sensors 4Determine groove, the inwall of holddown groove is provided with side direction fixed screw holes 12 and miniature leading screw 13, and miniature leading screw 13 is located atSide direction fixed screw holes 12 is interior and in side direction, fix single component sensor 4, and the laterally fixing of miniature leading screw 13 canAvoid longitudinally walking about of single component sensor 4, further guarantee the precision of measuring.
Stationary housing is embedded on ocean platform by built-in fitting 7, and force plate 1 outer surface and ocean platform are to be measuredThe outer surface in region is concordant, thereby simulation ocean platform is subject to the situation of wave slamming. Built-in fitting 7 adopt aluminium sheet orSteel plate, built-in fitting 7 is rigidly connected with the bottom surface of shell 6, for the base 5 that is furnished with single component sensor 4 providesEnough rigidity. The corresponding shell of built-in fitting 76 installation places are provided with bolt hole and the logical line three-way hole for installing.
In the time of wave slamming force plate 1, may there is the situation of sensor internal water inlet, the flowing of internal liquidThe accuracy that can affect measurement result, therefore, force plate 1 outer surface is coated with the rubber film 3 for waterproof,These rubber film 3 good springiness, thin and difficult broken, watertightness is good.
In the present embodiment, single component sensor 4 is chosen for four, and base 5 and shell 6 are rectangular-shaped simultaneously,The cavity cross section of base 5 is rectangle, and the area of force plate 1 is less than the cavity cross section of base 5 and is positioned at itMiddle and upper part arranges respectively four holddown grooves on four jiaos of the cavitys of base 5, and this holddown groove is divided into the circle being communicated with up and down11, four single component sensors 4 of cylinder groove 10 and logical line open slot are positioned over respectively a cylinder groove 10In, and fix its data wire by logical line open slot 11, the both sides, top of shell 6 are stepped, for oceanPlatform, to test wooden model or marine structure closely fixing.
While utilizing the utility model device to carry out wave slamming load measuring method, comprise the following steps:
1) the wave slamming load measurement mechanism after assembling is carried out to index qualification, is specially:
11) the wave slamming load measurement mechanism after two assemblings is symmetrically set in test sphenoid 9, and closelyCoordinate, these test sphenoid 9 bottom surfaces are provided with two symmetries, form the inclined plane of wedge angle, difference on two inclined planesOffer the square aperture with rounded corner corresponding with top cover 2, the outer surface of force plate 1 and the outer surface on inclined planeConcordant;
The inclination angle on inclined plane is 10 ° of left and right, and the existing widely analytic solutionand numerical solution of accreditation of this gradient is convenientThe reasonability of contrast calibration equipment design, has 10 ° of inclination angles to be beneficial to the certainty of measurement of verification measurement mechanism, in realityIn model measurement, wave not necessarily vertically acts on model.
12) carry out index qualification by impulse power hammer qualification test and sphenoid free-falling qualification test, by inspectionTest and demarcate to ensure measurement mechanism reliable operation.
The power that impulses hammer qualification test is: as shown in Figure 3, utilize the power hammer 8 that impulses to knock single wave slamming load and surveyMeasure the force plate 1 of device, and hammer the percussion power number of 8 instantaneous outputs by the high speed acquisition system Real-time Collection power of impulsing into shapeSingle component numerical value that value and multiple single component sensor 4 detect, by contrast percussion power numerical value with by single component numerical valueSynthetic single component is proofreaied and correct and is demarcated wave slamming load measurement mechanism with joint efforts, as shown in Figure 4, measures dressPut the synthetic percussion power numerical value rear and the power hammer 8 that impulses of interior four single component numerical value and carry out data comparison, can find out fourThe synthetic single component of individual single component numerical value is consistent with percussion power numerical value, and real-time is good with joint efforts.
Sphenoid free-falling qualification test is: adopt freely falling body test mode, test sphenoid 9 is freely fallenEnter in water, single component numerical value that the multiple single component sensors 4 of Real-time Collection detect, by contrasting two wave slammingsSingle component that load-measuring device is measured makes a concerted effort to carry out the symmetry verification of wave slamming load measurement mechanism structure,Whether the result that verification obtains has symmetry, is conducive to ensure that structure is strictly symmetrical, single component is made a concerted effort simultaneously withNumerical simulation result of calculation contrasts, performance and the accuracy of checking wave slamming load measurement mechanism.
2) even embedded multiple indexs after qualified successively from high to low on the region to be measured of ocean platformWave slamming load measurement mechanism, force plate 1 outer surface is concordant with the outer surface in ocean platform region to be measured.
3) single component sensor 4 detects the single component numerical value of wave to force plate 1, by the single component detectingNumerical value obtains wave slamming load.
Taking a round table-like wooden model of test as example, with the wooden modeling ocean platform of this test, built-in fitting 7The installed surface of upper stationary housing keeps same distance with the outer surface of the wooden model of test, and then ensures on stationary housingHollow region is concordant with the outer surface of the wooden model of test, puts into water at the wooden model of test, simulation ocean platformBe subject to the situation of wave slamming, through the data acquisition of high speed acquisition system, the amplitude that can meet with a response operator curve, asShown in Fig. 5 and Fig. 6, at low-frequency region, particularly under the vibration frequency (Frequency) of 1000Hz,Response amplitude operator approaches 1, and apparently higher than the characteristic frequency of wave slamming, thereby it is excessive to avoid occurring resonance dynamometrySituation, ensures to survey slamming power accurately true.
Claims (7)
1. a wave slamming load measurement mechanism, is characterized in that, comprises stationary housing, and is located at respectivelyForce plate (1) in stationary housing and single component sensor (4), described single component sensor (4) is multiple,Multiple single component sensors (4) uniform setting in stationary housing vertically, described force plate (1) is against multipleThe contact of single component sensor (4), described stationary housing is provided with the hollow region of settling force plate (1).
2. a kind of wave slamming load measurement mechanism according to claim 1, is characterized in that described listThe integral multiple that the quantity of component sensor (4) is four.
3. a kind of wave slamming load measurement mechanism according to claim 1, is characterized in that, described solidFixed shell is embedded on ocean platform by built-in fitting (7), and described force plate (1) outer surface and ocean platform are treatedThe outer surface of measured zone is concordant.
4. a kind of wave slamming load measurement mechanism according to claim 1, is characterized in that described surveyPower plate (1) outer surface is coated with the rubber film (3) for waterproof.
5. a kind of wave slamming load measurement mechanism according to claim 1, is characterized in that, described solidFixed shell comprises shell (6), be fixed on base (5) in shell (6) and lid is located at shell (6) end faceTop cover (2), described base (5) is hollow structure, described force plate (1) and single component sensor (4) pointBe not located in the cavity of base (5), described hollow region is located on top cover (2).
6. a kind of wave slamming load measurement mechanism according to claim 5, is characterized in that the described endIn the cavity of seat (5), be provided with the holddown groove of multiple fixing single component sensors (4), on the inwall of described holddown grooveBe provided with side direction fixed screw holes (12) and miniature leading screw (13), described miniature leading screw (13) is located at side direction and is fixedIn screw hole (12) and fix single component sensor (4) in side direction.
7. a kind of wave slamming load measurement mechanism according to claim 1, is characterized in that described surveyPower plate (1) is provided with the corresponding close-fitting groove of contact of multiple and single component sensor (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520997766.1U CN205262666U (en) | 2015-12-03 | 2015-12-03 | Wave slamming load measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520997766.1U CN205262666U (en) | 2015-12-03 | 2015-12-03 | Wave slamming load measuring device |
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| CN205262666U true CN205262666U (en) | 2016-05-25 |
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| CN201520997766.1U Active CN205262666U (en) | 2015-12-03 | 2015-12-03 | Wave slamming load measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105444939A (en) * | 2015-12-03 | 2016-03-30 | 上海交通大学 | Wave slamming load measuring device and method |
| US11155324B2 (en) | 2017-09-13 | 2021-10-26 | Hefring ehf. | Methods and systems for wave slam monitoring of water vessels |
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2015
- 2015-12-03 CN CN201520997766.1U patent/CN205262666U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105444939A (en) * | 2015-12-03 | 2016-03-30 | 上海交通大学 | Wave slamming load measuring device and method |
| US11155324B2 (en) | 2017-09-13 | 2021-10-26 | Hefring ehf. | Methods and systems for wave slam monitoring of water vessels |
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