CN103033314A - Torsion calibration device and method for measurement beam used for ship model wave load test - Google Patents
Torsion calibration device and method for measurement beam used for ship model wave load test Download PDFInfo
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- CN103033314A CN103033314A CN2012105648929A CN201210564892A CN103033314A CN 103033314 A CN103033314 A CN 103033314A CN 2012105648929 A CN2012105648929 A CN 2012105648929A CN 201210564892 A CN201210564892 A CN 201210564892A CN 103033314 A CN103033314 A CN 103033314A
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- 238000012360 testing method Methods 0.000 title claims abstract description 26
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- 239000011888 foil Substances 0.000 claims abstract description 18
- 238000007405 data analysis Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
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Abstract
The invention provides a torsion calibration device for a measurement beam used for a ship model wave load test. The torsion calibration device for the measurement beam used for the ship model wave load test comprises a measurement beam. A beam surface of a measurement profile of the measurement beam is provided with a foil gage. One end of the measurement beam is fixed on a support, and the other end of the measurement beam is fixedly connected with a rod piece. The rod piece is vertical to the axis of the measurement beam. A tray is hung on one end of the rod piece through steel wire ropes, and weights can be placed on the tray. The distance between one end of the rod piece and a hanging end is equal to the distance between the other end of the rod piece and the hanging end. The torsion calibration device for the measurement beam used for the ship model wave load test provides a torsion calibration method for a measurement beam used for a ship model wave load test. According to the torsion calibration method for the measurement beam used for the ship model wave load test, by independently conducting gradation loading and weight unloading on two ends of the rod piece, the strain of each measurement profile is collected, fitting coefficients of the weight acting force and the strain are obtained, and a coefficient factor of the strain of each measurement profile of the measurement beam and a torsion in the wave load which is actually suffered by each measurement profile of the ship model is counted. The coefficient factor between the strain of each measurement profile of the measurement beam and a torsion in the sea load which is actually suffered by each measurement profile of the ship model can be demarcated through the torsion calibration device and the method for the measurement beam used for the ship model wave load test.
Description
Technical field
The present invention relates to sectional type ship model seaway load technical field of measurement and test, be specifically related to for respectively measuring the device and method that the relation between the seaway load that section suffers is demarcated to measuring the strain of respectively measuring section on the beam and ship model, relate in particular to strain and ship model that the measurement beam is respectively measured section and respectively measure the device and method that the relation between the actual moment of torsion that suffers of section is demarcated.
Background technology
The seaway load test macro is mainly used in measuring wave shearing, moment of flexure, moment of torsion and slamming pressure, relate to the design of ship model self structure and Design of Test System two aspects, the ship model structural design that present stage is used for test mainly comprises these three kinds of continuous type ship model, sectional type ship model and integral, flexible ship models, and wherein, the design of sectional type ship model more can be fit to the test objective of seaway load.Utilizing the sectional type model to carry out in the method for seaway load test, can utilize resistance or seakeeping test model, the place, transverse section of measuring wave bending moment in wish disconnects, and measure beam with the metal of certain bending stiffness and firmly connect each segmentation that ship model is vertically cut apart, by foil gauge and the external strain instrument of pasting on the beams of metal corresponding with ship model segmentation otch, this moment of flexure that suffers in wave reflects with the form of strain with ship model, calculates wave bending moment and moment of torsion by the series of computation formula again.Above-mentioned method of testing is based on the strain that measures on the beams of metal and ship model and respectively measures between the actual seaway load that suffers of section and exist certain corresponding relation, therefore before test, be about to measure beam be installed to test on the ship model before, need to determine the strain that each measures section and the corresponding relation coefficient that ship model is respectively measured the actual seaway load that suffers of section, and be used at present determining that also there is very large research space in the apparatus and method of described corresponding relation coefficient.
Summary of the invention
The applicant improves for above-mentioned shortcoming of the prior art, provide the test of a kind of ship model seaway load with torque calibrating device and the method for measuring beam, it can respectively be measured the coefficient of relationship that the strain of section and ship model respectively measure between the moment of torsion in the actual seaway load that suffers of section and demarcate measuring beam.
Technical scheme of the present invention is as follows:
The present invention's the ship model seaway load test torque calibrating device of measuring beam, comprise the measurement beam, the beam surface of measuring the measurement section place of beam is provided with foil gauge, measuring Liang Yiduan is fixed on the support, the other end is connected with rod member, and rod member is vertical with the axis of measuring beam, and an end of rod member has pallet by steel wire hang, can place counterweight on the pallet, the rod member two ends equate with the distance of described suspended end.
Its further technical scheme is:
Described measurement beam is round metal tube.
Described foil gauge is uniform with 90 ° along the beam surface of measuring beam measurement section place, and four corresponding foil gauges are that full-bridge connects on the measurement section.
The present invention's the ship model seaway load test moment of torsion scaling method of measuring beam comprises following steps:
The first step, the measurement Liang Yiduan that is pasted with foil gauge is fixed on the support, makes and measure the section foil gauge that directly makes progress and the vertical diameter layout at 45 ° of measuring section, at an end of rod member by the steel wire hang pallet, make i represent to measure section, make L represent the length of rod member;
Second step, behind hierarchical loading counterweight on the pallet, the load shedding counterweight is used external dynamic strainmeter and computer control system collection and is measured the strain output U that beam is respectively measured section again
I0, U
I1..., U
Im, the total progression of m for loading and unloading;
The 3rd step repeated second step, namely repeated hierarchical loading at pallet, unloads counterweight and gathered strain output data, operated n time, and each measurement section of then measuring beam all obtains the strain output data of large group of corresponding n;
The 4th step, data analysis to second step and collection in the 3rd step, counterweight acting force and the strain output data of at first each that measure beam being measured large group of the n of section adopt respectively least square method to carry out match, and then each is measured section and can obtain n fitting coefficient Ft
1i, Ft
2i..., Ft
Ni;
The 5th step was suspended on the other end of rod member with the wire rope in the first step and pallet, repeated second step and the 3rd step, and each that then measure beam is measured the strain output data that section all obtains large group of other n;
The 6th step, to the data analysis that gathers in the 5th step, counterweight acting force and the strain output data of at first each that measure beam being measured large group of the other n of section adopt respectively least square method to carry out match, and then each is measured section and can obtain other n fitting coefficient Ft
1i＇, Ft
2i＇ ..., Ft
Ni＇;
In the 7th step, the fitting coefficient by the 4th step and the 6th step acquisition and the length L of rod member calculate the moment of torsion Mt of each areal survey section of sectional type ship model
iCalibration coefficient Ct
i, i.e. Ct
i=[(Ft
1i-Ft
1i＇)+(Ft
2i-Ft
2i＇)+... + (Ft
Ni-Ft
Ni＇)] * L/n.
Its further technical scheme is:
From described three steps of second step to the, the frequency n of operation is at least three times altogether.
Technique effect of the present invention:
The present invention can realize respectively measuring the coefficient of relationship that the strain of section and ship model respectively measure between the moment of torsion in the actual seaway load that suffers of section and demarcating measuring beam, and simple in structure, easy to operate.
Description of drawings
Fig. 1 is sectional type ship model and the assembling synoptic diagram of measuring beam.
Fig. 2 is the easy structure synoptic diagram that the torque calibrating device of measuring beam is used in the present invention's ship model seaway load test.
Fig. 3 is the measurement section of measurement beam and the layout synoptic diagram of foil gauge.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
Before strain-bending moment coefficients of respectively measuring section 7 to measuring beam 1 is demarcated, to accurately orient according to the areal survey profile position of sectional type ship model 9 first the position of each measurement section 7 of measuring beam 1, the measurement section 7 of namely measuring beam 1 is corresponding with the areal survey section of sectional type ship model 9, see Fig. 1, Fig. 1 is sectional type ship model 9 and the assembling synoptic diagram of measuring beam 1, ship model 9 is divided into 4 sections among the figure, rigidly fix pedestal 10 with each connection segment of ship model 9 by what measure beam 1 below, and measure beam 1 respectively to measure section 7 corresponding one by one with each areal survey profile position of sectional type ship model 9.
See Fig. 2, the present invention's the ship model seaway load test torque calibrating device of measuring beam, comprise and measure beam 1, the beam surface of measuring measurement section 7 places of beam 1 is provided with foil gauge 2, and it is fixed by snap on support 3 to measure beam 1 one ends, and the other end is connected with rod member 8, rod member 8 is vertical with the axis of measuring beam 1, one end of rod member 8 is hung with pallet 5 by wire rope 4, can place counterweight 6 on the pallet 5, and the two ends of rod member 8 equate with the distance of described suspended end.
Preferably, measuring beam 1 is round metal tube, sees Fig. 3, and foil gauge 2 is uniform with 90 ° along the beam surface of measuring beam 1 measurement section 7 places, and four corresponding foil gauges 2 connect for full-bridge on the measurement section 7.
When carrying out timing signal to the moment of torsion Mt that measures beam 1, described caliberating device need to use twice, the two ends that are rod member 8 all will be as the suspended end of wire rope 4 and pallet 5, and the two ends of rod member 8 can not be simultaneously as suspended end, but minute sequencing is independent of suspended end.
The present invention's ship model seaway load test comprises following steps with the moment of torsion scaling method of measuring beam:
The first step, measurement beam 1 one ends that are pasted with foil gauge 2 are fixed on the support 3, make and measure section 7 the footpaths foil gauge 2 that makes progress and the vertical diameter layout at 45 ° of measuring section 7, hang pallets 5 at an end of rod member 8 by wire rope 4, make i represent to measure section 7, make L represent the length of rod member 8;
Second step, behind hierarchical loading counterweight 6 on the pallet 5, the load shedding counterweight 6 again, use external dynamic strainmeter and computer control system collection and measure the strain output U that beam 1 is respectively measured section 7
I0, U
I1..., U
Im, the total progression of m for loading and unloading;
The 3rd step repeated second step, namely repeated hierarchical loading, unloading counterweight 6 and gathered strain output data at pallet 5, operated n time, and each measurement section 7 of then measuring beam 1 all obtains the strain output data of large group of corresponding n;
The 4th step, data analysis to second step and collection in the 3rd step, counterweight acting force and the strain output data of at first each that measure beam 1 being measured large group of the n of section 7 adopt respectively least square method to carry out match, and then each is measured section 7 and can obtain n fitting coefficient Ft
1i, Ft
2i..., Ft
Ni, Ft
NiFitting coefficient for counterweight acting force and strain output;
The 5th step was suspended on the other end of rod member 8 with the wire rope 4 in the first step and pallet 5, repeated second step and the 3rd step, and each that then measure beam 1 is measured the strain output data that section 7 all obtains large group of other n;
The 6th step, to the data analysis that gathers in the 5th step, counterweight acting force and the strain output data of at first each that measure beam 1 being measured large group of the other n of section 7 adopt respectively least square method to carry out match, and then each is measured section 7 and can obtain other n fitting coefficient Ft
1i＇, Ft
2i＇ ..., Ft
Ni＇;
In the 7th step, the fitting coefficient by the 4th step and the 6th step acquisition and the length L of rod member 8 calculate the moment of torsion Mt of each areal survey section of sectional type ship model 9
iCalibration coefficient Ct
i, i.e. Ct
i=[(Ft
1i-Ft
1i＇)+(Ft
2i-Ft
2i＇)+... + (Ft
Ni-Ft
Ni＇)] * L/n.
Particularly, from described three steps of second step to the, the frequency n of operation is at least the total number of operations that namely loads, unloads at least three times three times altogether.
The present invention can realize respectively measuring the coefficient of relationship that the strain of section 7 and ship model 9 respectively measure between the moment of torsion in the actual seaway load that suffers of section and demarcating measuring beam 1, and simple in structure, easy to operate.
More than describing is explanation of the invention, is not that limited range of the present invention within protection scope of the present invention, can be done any type of modification referring to claim to the restriction of invention.
Claims (5)
1. the ship model seaway load is tested with the torque calibrating device of measuring beam, comprise and measure beam (1), the beam surface that the measurement section (7) of measurement beam (1) is located is provided with foil gauge (2), it is characterized in that: measure beam (1) one end and be fixed on the support (3), the other end is connected with rod member (8), rod member (8) is vertical with the axis of measuring beam (1), one end of rod member (8) is hung with pallet (5) by wire rope (4), can place counterweight (6) on the pallet (5), rod member (8) two ends equate with the distance of described suspended end.
2. by the torque calibrating device of ship model seaway load test claimed in claim 1 with the measurement beam, it is characterized in that: described measurement beam (1) is round metal tube.
3. by the torque calibrating device of ship model seaway load test claimed in claim 2 with the measurement beam, it is characterized in that: the beam surface that described foil gauge (2) is located along measurement beam (1) measurement section (7) is uniform with 90 °, and upper corresponding four foil gauges (2) of measurement section (7) are the full-bridge connection.
4. the test of ship model seaway load is characterized in that with the moment of torsion scaling method of measuring beam, comprises following steps:
The first step, measurement beam (1) one end that will be pasted with foil gauge (2) is fixed on the support (3), make and measure section (7) the footpath foil gauge (2) that makes progress and the vertical diameter layout at 45 ° of measuring section (7), end at rod member (8) hangs pallet (5) by wire rope (4), make i represent to measure section (7), make L represent the length of rod member (8);
Second step, behind the upper hierarchical loading counterweight (6) of pallet (5), load shedding counterweight (6) is used external dynamic strainmeter and computer control system collection and is measured the strain output U that beam (1) is respectively measured section (7) again
I0, U
I1..., U
Im, the total progression of m for loading and unloading;
The 3rd goes on foot, and repeats second step, namely repeats hierarchical loading, unloading counterweight (6) and gathers strain output data at pallet (5), operates n time, and each measurement section (7) of then measuring beam (1) all obtains the strain output data of large group of corresponding n;
The 4th step, data analysis to second step and collection in the 3rd step, counterweight acting force and the strain output data of at first each that measure beam (1) being measured large group of the n of section (7) adopt respectively least square method to carry out match, and then each is measured section (7) and can obtain n fitting coefficient Ft
1i, Ft
2i..., Ft
Ni;
The 5th step was suspended on the other end of rod member (8) with the wire rope in the first step (4) and pallet (5), repeated second step and the 3rd step, and each that then measure beam (1) is measured the strain output data that section (7) all obtains large group of other n;
The 6th step, to the data analysis that gathers in the 5th step, counterweight acting force and the strain output data of at first each that measure beam (1) being measured large group of the other n of section (7) adopt respectively least square method to carry out match, and then each is measured section (7) and can obtain other n fitting coefficient Ft
1i＇, Ft
2i＇ ..., Ft
Ni＇;
In the 7th step, the fitting coefficient by the 4th step and the 6th step acquisition and the length L of rod member (8) calculate the moment of torsion Mt of each areal survey section of sectional type ship model (9)
iCalibration coefficient Ct
i, i.e. Ct
i=[(Ft
1i-Ft
1i＇)+(Ft
2i-Ft
2i＇)+... + (Ft
Ni-Ft
Ni＇)] * L/n.
5. by the moment of torsion scaling method of ship model seaway load test claimed in claim 4 with the measurement beam, be characterised in that: from described three steps of second step to the, the frequency n of operation is at least three times altogether.
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| CN103743540A (en) * | 2014-01-02 | 2014-04-23 | 哈尔滨工程大学 | Sectional wave load testing model for air cushion vehicle |
| CN104296900A (en) * | 2014-11-04 | 2015-01-21 | 苏州精创光学仪器有限公司 | Hollow circular tube primary stress measuring device |
| CN104359602A (en) * | 2014-11-28 | 2015-02-18 | 中国船舶重工集团公司第七○二研究所 | Rigidity-adjustable type ship model sea load vertical bending moment measuring device |
| CN105241606A (en) * | 2015-11-26 | 2016-01-13 | 重庆理工大学 | Gear selecting and shifting force transducer calibration method |
| CN105355132A (en) * | 2015-10-22 | 2016-02-24 | 江苏科技大学 | Torsion experiment device for large-opening ship unbalanced in cargo loading and simulation method |
| CN106546408A (en) * | 2016-11-04 | 2017-03-29 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Ship wave loads test measurement beam caliberating device |
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| CN103743540A (en) * | 2014-01-02 | 2014-04-23 | 哈尔滨工程大学 | Sectional wave load testing model for air cushion vehicle |
| CN104296900A (en) * | 2014-11-04 | 2015-01-21 | 苏州精创光学仪器有限公司 | Hollow circular tube primary stress measuring device |
| CN104359602A (en) * | 2014-11-28 | 2015-02-18 | 中国船舶重工集团公司第七○二研究所 | Rigidity-adjustable type ship model sea load vertical bending moment measuring device |
| CN105355132A (en) * | 2015-10-22 | 2016-02-24 | 江苏科技大学 | Torsion experiment device for large-opening ship unbalanced in cargo loading and simulation method |
| CN105355132B (en) * | 2015-10-22 | 2016-12-14 | 江苏科技大学 | Goods loads uneven ship with large hatch openings torsion experiment device and analogy method |
| CN105241606B (en) * | 2015-11-26 | 2018-02-02 | 重庆理工大学 | A kind of shifting force sensor caliberating method |
| CN105241606A (en) * | 2015-11-26 | 2016-01-13 | 重庆理工大学 | Gear selecting and shifting force transducer calibration method |
| CN106546408B (en) * | 2016-11-04 | 2018-08-14 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Ship wave loads test measurement beam caliberating device |
| CN106546408A (en) * | 2016-11-04 | 2017-03-29 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Ship wave loads test measurement beam caliberating device |
| CN106768853A (en) * | 2017-03-31 | 2017-05-31 | 武汉理工大学 | Structural collapse response test method and device of the hull beam under wave |
| CN106768853B (en) * | 2017-03-31 | 2019-03-08 | 武汉理工大学 | Structural collapse response test method and device of the hull beam under wave |
| CN108197415A (en) * | 2018-02-06 | 2018-06-22 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of optimum design method of the vertical beam type axial force component structure of rod-type balance |
| CN108197415B (en) * | 2018-02-06 | 2021-02-19 | 中国空气动力研究与发展中心超高速空气动力研究所 | Optimized design method for vertical beam type axial force element structure of rod type balance |
| CN109655229A (en) * | 2018-05-11 | 2019-04-19 | 中国船舶工业集团公司第七0八研究所 | A kind of design of small-waterplane-area catamaran hull seaway load test model and test method |
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| CN111658163B (en) * | 2020-05-06 | 2021-04-30 | 河南省人民医院 | Calibration device and calibration method for loading coefficient of force feedback bone awl for spinal surgery |
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