CN104118532B - Hydrodynamic performance measuring mechanism in ship model wave in stability test device - Google Patents
Hydrodynamic performance measuring mechanism in ship model wave in stability test device Download PDFInfo
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- CN104118532B CN104118532B CN201410362454.3A CN201410362454A CN104118532B CN 104118532 B CN104118532 B CN 104118532B CN 201410362454 A CN201410362454 A CN 201410362454A CN 104118532 B CN104118532 B CN 104118532B
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Abstract
Hydrodynamic performance measuring mechanism in ship model wave in stability test device, comprise the pedestal be supported on slidably on trailer survey bridge, bracing frame is through pedestal and affixed with pedestal, the pulley of bracing frame upper end is wound with steel rope, steel rope one end connects counterweight, the other end connects heave bar, and heave bar also can slide up and down through pedestal; The middle bracing wire external part of heave bar and stay-supported type displacement sensor is affixed; Heave bar bottom is equipped with three points of force snesor, supporting seats successively, the two side of supporting seat is provided with axis of pitch, axis of pitch and axis of roll form cross profile shaft, axis of roll is erected on the permanent seat of supporting seat both sides, axis of pitch and axis of roll are all connected with rotational potentiometer, and the axis of roll other end is connected with rolling moment sensor and rolling latching device in turn.The present invention can realize ship model longitudinal force, transverse force, yawing moment, pitching displacement, hang down and swing the measurement of displacement, by locking or the release of rolling motion, can also realize the measurement of yawing moment or rolling displacement.
Description
Technical field
The present invention relates to hydrodynamic performance technical field of measurement and test, be specifically related to for the hydrodynamic performance measuring mechanism in the model experiment of stability research in boats and ships wave, particularly relate to longitudinal force in ship model wave, transverse force, yawing moment, pitching displacement, hang down and swing the measuring mechanism of displacement, rolling moment or rolling displacement.
Background technology
Stability of Ship, refer to that boats and ships depart from its balance position and tilting of top-uping by External Force Acting, the ability of former balance position can be returned to after external force disappears, the ship with this ability is stable, otherwise be unstable or neutral equilibrium, Stability of Ship is one of most important performance of boats and ships, is the basic guarantee of marine operation safety.Model test is the main method of boats and ships intact stability research.In existing ship model wave, stability test belongs to two-dimensional measurement, namely only longitudinal force can be measured, pitching displacement and hang down swing displacement, and be only suitable in the test of the rapidity seaworthiness in wave of heading sea, but, the measurement of lever arm of stability is carried out in wave, except the simulation of ship model navigation and wave in rough water quality model test must be considered, more importantly the simulation of movement of ship model attitude and the Measurement accuracy of moment, except the motion of needs ship model band yaw angle, also need ship model can be free-moving in vertical and pitching direction, also want to carry out change heel hydrodynamic test simultaneously, so that can measure Stability of Ship research in relate to longitudinal force, transverse force, the measurement of yawing moment and rolling moment, pitching displacement can also be measured simultaneously, hang down and swing displacement even rolling displacement, also there is no the measurement mechanism of stability test in this ship model wave at present.
Summary of the invention
The applicant improves for above-mentioned shortcoming of the prior art, hydrodynamic performance measuring mechanism in stability test device in a kind of ship model wave is provided, it can realize ship model longitudinal force, transverse force, yawing moment, pitching displacement, hang down and swing the measurement of displacement and rolling displacement, also can realize determining longitudinal force, transverse force, yawing moment, pitching displacement under angle of heel, hang down and swing the measurement of displacement and rolling moment.
Technical scheme of the present invention is as follows:
Hydrodynamic performance measuring mechanism in ship model wave in stability test device, comprise across and be supported on the pedestal on trailer survey bridge slidably, bracing frame is through pedestal and affixed with pedestal, pedestal upper end is installed with mount pad one, mount pad one is equipped with pulley by bearing arrangement, pulley is laterally wound with steel rope, one end of steel rope connects weight linear meter, the other end of steel rope connects heave bar, heave bar and weight linear meter are positioned at the both sides of bracing frame, heave bar also can slide up and down through pedestal, weight linear meter is set in guide holder, guide holder and bracing frame affixed, the lower end of weight linear meter is installed with pallet, pallet is for placing counterweight, pedestal is fixed with stay-supported type displacement sensor, and the bracing wire external part of stay-supported type displacement sensor is fixed on heave bar, and described bracing wire is vertical layout, three points of force snesor are equipped with in the bottom of heave bar, are connected with supporting seat below three points of force snesor, and there is axis of pitch the two side of supporting seat by bearing arrangement erection, and axis of pitch one end is connected with rotational potentiometer one, arrange vertical with axis of roll of axis of pitch forms cross profile shaft, the two ends of axis of roll are erected at by bearing arrangement on the permanent seat of supporting seat both sides, axis of roll one end is connected with rotational potentiometer two, the axis of roll other end is connected with rolling moment sensor, rolling positioning seat and rolling calibration locking plate in turn, rolling positioning seat and permanent seat are all fixedly supported on connecting panel, and connecting panel is connected with ship model, bracing frame is provided with the guiding mechanism of the heave movement of heave bar.
Its further technical scheme is:
The U-shaped structure of described supporting seat, there is axis of pitch the two side of U-shaped supporting seat by bearing arrangement erection, and the two ends of axis of roll are erected on the permanent seat of the U-shaped opening both sides of U-shaped supporting seat by bearing arrangement.
Described guiding mechanism comprises the vertical lines guideway be located on bracing frame, and the slide block in heave bar and vertical lines guideway is affixed.
Described three points of force snesor are combined sensor structure, comprise the separate longitudinal force sensor arranged successively, yawing torque sensor and transverse force sensor from top to bottom, three are independently connected by butt flange between sensor, longitudinal force sensor and heave bar affixed, transverse force sensor and U-shaped supporting seat affixed.
Described axis of pitch is connected by coupler one with the projecting shaft of rotational potentiometer one, and axis of roll is connected by coupler two with the projecting shaft of rotational potentiometer two.
Described vertical lines guideway adopts the load linear rolling guides such as four directions.
Technique effect of the present invention:
In measuring mechanism of the present invention, ship model is free-moving in vertical and pitching direction, change heel hydrodynamic test can also be carried out simultaneously, by the setting of multi dimension force transducer, longitudinal force, transverse force, the yawing moment three kinds of hydrodynamic performances on ship model can be acted in Obtaining Accurate wave, by the setting of axis of pitch and rotational potentiometer, can casterangle be measured, by the setting of zip mode displacement pickup, the heave displacement of ship model can be measured, the present invention arranges rolling positioning seat and rolling calibration locking plate, and can lock or unclamp therebetween, thus the motion on rolling direction is tied or unfettered, thus when rolling motion is tied, can carry out determining angle of heel hydrodynamic test, except the longitudinal force acted on ship model can be measured, transverse force, the heave displacement of yawing moment and ship model and casterangle, the rolling moment on ship model can also be acted on by rolling moment sensor measurement, when rolling motion is unfettered, except the longitudinal force acted on ship model can be measured, transverse force, the heave displacement of yawing moment and ship model and casterangle, the angle of heel measuring ship model can also be set by axis of roll and rotational potentiometer.The measurement being measured as lever arm of stability in ship model wave of multiple hydrodynamic performance provides more perfect Fundamentals of Measurement, and then provides more perfect basic guarantee for the research of boats and ships pure stability.
The present invention have employed trailing type weight balancing structure in the measurement process of carrying out hydrodynamic performance, overcome heave bar, impact that the own wt of three points of measurement components such as force snesor, U-shaped supporting seat produces heave displacement measurement, and the displacement of counterweight have employed guide holder guiding, can not rock with trailer high-speed motion in process of the test, thus improve the stability of measurement; In process of the test, the catenary motion of heave bar is led by load linear rolling guides such as four directions on bracing frame, its load-carrying capacity is large, guiding accuracy is high, causes damage when can prevent from testing in the heavy load that trailer accelerates and retaining segment produces due to acceleration/deceleration to measuring equipment and tested model.
The present invention adopts longitudinal force sensor, yawing torque sensor and transverse force sensor three to be independently combined to form three points of force snesor between sensor, described three independently sensor all adopt strain gauge transducer, not only overload capacity is large for the sensor of this sectional construction, and antijamming capability is strong, survey precision is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is side-looking structural representation of the present invention, semi-sictional view in figure.
Fig. 3 is the part-structure schematic diagram of the present invention three points of force snesor lower ends.
Fig. 4 is the lateral plan of Fig. 3.
Fig. 5 is the structural representation of three points of force snesor of the present invention.
Wherein: 1, pedestal; 2, bracing frame; 3, mount pad one; 4, pulley; 5, steel rope; 6, weight linear meter; 7, heave bar; 8, guide holder; 9, pallet; 10, counterweight; 11, stay-supported type displacement sensor; 12, three points of force snesor; 121, longitudinal force sensor; 122, yawing torque sensor; 123, transverse force sensor; 13, supporting seat; 14, axis of pitch; 15, rotational potentiometer one; 16, axis of roll; 17, permanent seat; 18, rotational potentiometer two; 19, rolling moment sensor; 20, rolling positioning seat; 21, rolling calibration locking plate; 22, connecting panel; 23, vertical lines guideway; 24, slide block; 25, coupler one; 26, coupler two; 27, bridge surveyed by trailer; 28, locking jaw; 29, ear seat; 30, mount pad two; 31, mount pad three; 32, connecting bolt.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
See Fig. 1, Fig. 2, the present invention includes across and be supported on the pedestal 1 on trailer survey bridge 27 slidably, particularly, pedestal 1 is slidably connected at trailer by line slideway auxiliary and surveys on bridge 27, pedestal 1 is provided with locking jaw 28, surveys the locking of bridge 27 for pedestal 1 and trailer, bracing frame 2 is affixed with pedestal 1 through pedestal 1, pedestal 1 upper end is installed with a pair mount pad 1, mount pad 1 is equipped with pulley 4 by bearing arrangement, pulley 4 is laterally wound with steel rope 5, one end of steel rope 5 is connected with weight linear meter 6 by suspension hook and earrings assembly, the other end of steel rope 5 is connected with heave bar 7 by suspension hook and earrings assembly, heave bar 7 and weight linear meter 6 are positioned at the both sides of bracing frame 2, heave bar 7 also can slide up and down through pedestal 1, weight linear meter 6 is set in guide holder 8, guide holder 8 is affixed with bracing frame 2, the lower end of weight linear meter 6 is installed with pallet 9, pallet 9 is for placing counterweight 10, the counterweight 10 of steel rope 5 side is for the weight of the heave bar 7 of balance rope 5 opposite side and the measurement mechanism with heave bar 7 dipping and heaving, pedestal 1 is fixed with stay-supported type displacement sensor 11, the bracing wire external part of stay-supported type displacement sensor 11 is fixed on heave bar 7 by ear seat 29, and bracing wire is vertical layout, three points of force snesor 12 are equipped with in the bottom of heave bar 7, supporting seat 13 is connected with below three points of force snesor 12, see Fig. 3, Fig. 4, the U-shaped structure of described supporting seat 13, the two side of U-shaped supporting seat 13 there is axis of pitch 14 by bearing arrangement erection, axis of pitch 14 one end passes supporting seat 13, and be connected with the projecting shaft of rotational potentiometer 1 by coupler 1, rotational potentiometer 1 is fixed on supporting seat 13 by mount pad 2 30, arrange vertical with axis of roll 16 of axis of pitch 14 forms cross profile shaft, the two ends of axis of roll 16 are erected at by bearing arrangement on the permanent seat 17 of U-shaped supporting seat 13U type opening both sides, axis of roll 16 one end is connected with the projecting shaft of rotational potentiometer 2 18 by coupler 2 26, rotational potentiometer 2 18 is fixed on permanent seat 17 by mount pad 3 31, axis of roll 16 other end is connected with rolling moment sensor 19 in turn, rolling positioning seat 20 and rolling calibration locking plate 21, between axis of roll 16 and rolling moment sensor 19, all realize being connected by butt flange between rolling moment sensor 19 with rolling positioning seat 20, rolling positioning seat 20 and permanent seat 17 are all fixedly supported on connecting panel 22, connecting panel 22 is connected with ship model, the rolling positioning seat 20 that axis of roll 16 axle head connects and rolling calibration locking plate 21 form rolling catch gear, namely by the locking between rolling positioning seat 20 and rolling calibration locking plate 21 or release connection, lock or discharge rolling motion, particularly, connecting bolt 32 is provided with between rolling positioning seat 20 and rolling calibration locking plate 21, bracing frame 2 is provided with the guiding mechanism of the heave movement of heave bar 7, described guiding mechanism comprises the vertical lines guideway 23 be located on bracing frame 2, heave bar 7 is affixed with the slide block 24 in vertical lines guideway 23, wherein, calibration on rolling calibration locking plate 21 is located through calibration knock hole positioning lock adjustment on rolling calibration locking plate 21 and is then fixed with fix screw, belongs to prior art.
Particularly, see Fig. 5, described three points of force snesor 12 are combined sensor structure, comprise the separate longitudinal force sensor 121 arranged successively from top to bottom, yawing torque sensor 122 and transverse force sensor 123, described three are independently connected by butt flange between sensor, described three independently sensor all adopt strain gauge transducer, not only overload capacity is large for the sensor of this sectional construction, and antijamming capability is strong, survey precision is high, wherein, longitudinal force sensor 121 is affixed with heave bar 7, transverse force sensor 123 is affixed with U-shaped supporting seat 13.
Further, in order to reduce driving error, coupler 1 and coupler 2 26 all adopt gapless elastic clutch; In order to improve the guiding accuracy to heave bar heave movement, cause damage in the heavy load that trailer accelerates and retaining segment produces due to acceleration/accel to measuring equipment and tested ship model when preventing from testing, described vertical lines guideway 23 adopts the load linear rolling guides such as four directions.
Operation scheme of the present invention is as follows:
Before measurement, by affixed to ship model (also can be the water surface model of other types) and connecting panel 22, and the two fixing position is as far as possible near the center-of-gravity position of ship model, guarantee that the course of ship model is consistent with the working direction of towing tank trailer, the weight of counterweight 10 (comprises three points of force snesor 12 according to heave bar 7 and the measurement mechanism that is packed in heave bar 7 lower end, axis of pitch 14, axis of roll 16, supporting seat 13, permanent seat 17, rotational potentiometer 1, rotational potentiometer 2 18, two coupler, the mount pad of two rotational potentiometers, rolling positioning seat 20 and rolling calibration locking plate 21) weight summation and determine.After on-test, towing dolly drives tested ship model to survey bridge 27 along trailer and moves, and concrete measurement process is as follows:
Determine the hydrodynamic measurement under angle of heel: regulate the calibration location on rolling calibration locking plate 21, tested ship model is made to be adjusted to required angle of heel, and by connecting bolt 32, rolling positioning seat 20 and rolling calibration locking plate 21 are locked, axis of roll 16 is locked, thus the rolling motion of constraint ship model, ship model trailer drive under in Motion Waves, can be measured by three points of force snesor 12 and under this gait of march, act on the longitudinal force on tested ship model determining ship model under angle of heel, transverse force and yawing moment, the rolling moment acted on ship model can be measured by rolling moment sensor 19, by the change of gait of march, the longitudinal force of tested ship model under different gait of march can be measured, transverse force, rolling moment and yawing moment, in motion process, when tested ship model generation heave change, tested ship model drives heave bar 7 to move up and down, stay-supported type displacement sensor 11 is pulled by the ear seat 29 of heave bar 7 lower end, measure the heave movement track of heave bar 7, gathered the output signal of stay-supported type displacement sensor 11 by corresponding data collection and analysis process control system, thus record the heave displacement of tested ship model, when tested ship model generation trim, ship model drives connecting panel 22, rotational potentiometer 2 18, permanent seat 17, mount pad 3 31, rolling moment sensor 19, rolling positioning seat 20, rolling calibration locking plate 21, two butt flanges of axis of roll 16 other end, the entirety that axis of pitch 14 and axis of roll 16 are formed is around the center axis thereof of axis of pitch 14, axis of pitch 14 rotates, under the transmission effect of coupler 1, the resistance of rotational potentiometer 1 changes, the resistance variations of rotational potentiometer 1 is gathered by data collection and analysis process control system, thus record the trim angle of tested ship model.
Hydrodynamic measurement when rolling motion is unfettered: unclamp the connecting bolt 32 between rolling calibration locking plate 21 and rolling calibration positioning seat 20, make the rotation of axis of roll 21 unfettered, ship model in Motion Waves, can be measured by three points of force snesor 12 and under this gait of march, act on longitudinal force, transverse force and yawing moment on tested ship model determining ship model under angle of heel under trailer drives, in motion process, when tested ship model generation heave change, tested ship model drives heave bar 7 to move up and down, stay-supported type displacement sensor 11 is pulled by the ear seat 29 of heave bar 7 lower end, measure the heave movement track of heave bar 7, gathered the output signal of stay-supported type displacement sensor 11 by corresponding data collection and analysis process control system, thus record the heave displacement of tested ship model, when tested ship model generation trim, ship model drives connecting panel 22, rotational potentiometer 2 18, permanent seat 17, mount pad 3 31, rolling moment sensor 19, rolling positioning seat 20, rolling calibration locking plate 21, two butt flanges of axis of roll 16 other end, the entirety that axis of pitch 14 and axis of roll 16 are formed is around the center axis thereof of axis of pitch 14, axis of pitch 14 rotates, under the transmission effect of coupler 1, the resistance of rotational potentiometer 1 changes, the resistance variations of rotational potentiometer 1 is gathered by data collection and analysis process control system, thus record the trim angle of tested ship model, when tested ship model generation heel, ship model drives connecting panel 22, rotational potentiometer 2 18, permanent seat 17, mount pad 3 31, rolling moment sensor 19, rolling positioning seat 20, rolling calibration locking plate 21, two butt flanges of axis of roll 16 other end, the entirety that axis of pitch 14 and axis of roll 16 are formed is around the center axis thereof of axis of roll 16, rotational potentiometer 2 18 is around the center axis thereof of axis of roll 16, the resistance of rotational potentiometer 2 18 changes, the resistance variations of rotational potentiometer 2 18 is gathered by data collection and analysis process control system, thus record the angle of heel of tested ship model.
The present invention have employed trailing type weight balancing structure in the measurement process of carrying out hydrodynamic performance, overcome heave bar, impact that the own wt of three points of measurement components such as force snesor, U-shaped supporting seat produces heave displacement measurement, improve the precision of measurement and the stability of measurement.
More than describing is explanation of the invention, and be not the restriction to invention, limited range of the present invention, see claim, within protection scope of the present invention, can do any type of amendment.
Claims (6)
1. the hydrodynamic performance measuring mechanism in ship model wave in stability test device, comprise across and be supported on the pedestal (1) on trailer survey bridge (27) slidably, it is characterized in that: bracing frame (2) is with pedestal (1) affixed through pedestal (1), pedestal (1) upper end is installed with mount pad one (3), mount pad one (3) is equipped with pulley (4) by bearing arrangement, pulley (4) is upper is laterally wound with steel rope (5), one end of steel rope (5) connects weight linear meter (6), the other end of steel rope (5) connects heave bar (7), heave bar (7) and weight linear meter (6) are positioned at the both sides of bracing frame (2), heave bar (7) is through pedestal (1) and can slide up and down, weight linear meter (6) is set in guide holder (8), guide holder (8) is affixed with bracing frame (2), the lower end of weight linear meter (6) is installed with pallet (9), pallet (9) is for placing counterweight (10), pedestal (1) is fixed with stay-supported type displacement sensor (11), the bracing wire external part of stay-supported type displacement sensor (11) is fixed on heave bar (7), and described bracing wire is vertical layout, three points of force snesor (12) are equipped with in the bottom of heave bar (7), three points of force snesor (12) belows are connected with supporting seat (13), there is axis of pitch (14) two side of supporting seat (13) by bearing arrangement erection, and axis of pitch (14) one end is connected with rotational potentiometer one (15), arrange vertical with axis of roll (16) of axis of pitch (14) forms cross profile shaft, the two ends of axis of roll (16) are erected on the permanent seat (17) of supporting seat (13) both sides by bearing arrangement, axis of roll (16) one end is connected with rotational potentiometer two (18), axis of roll (16) other end is connected with rolling moment sensor (19), rolling positioning seat (20) and rolling calibration locking plate (21) in turn, rolling positioning seat (20) and permanent seat (17) are all fixedly supported on connecting panel (22), and connecting panel (22) is connected with ship model, bracing frame (2) is provided with the guiding mechanism of the heave movement of heave bar (7).
2. by the hydrodynamic performance measuring mechanism in stability test device in ship model wave according to claim 1, it is characterized in that: described supporting seat (13) U-shaped structure, there is axis of pitch (14) two side of U-shaped supporting seat (13) by bearing arrangement erection, and the two ends of axis of roll (16) are erected on the permanent seat (17) of the U-shaped opening both sides of U-shaped supporting seat (13) by bearing arrangement.
3. by the hydrodynamic performance measuring mechanism in stability test device in ship model wave according to claim 1, it is characterized in that: described guiding mechanism comprises the vertical lines guideway (23) be located on bracing frame (2), heave bar (7) is affixed with the slide block (24) in vertical lines guideway (23).
4. by the hydrodynamic performance measuring mechanism in stability test device in ship model wave according to claim 1, it is characterized in that: described three points of force snesor (12) are combined sensor structure, comprise the separate longitudinal force sensor (121) arranged successively, yawing torque sensor (122) and transverse force sensor (123) from top to bottom, three are independently connected by butt flange between sensor, longitudinal force sensor (121) is affixed with heave bar (7), and transverse force sensor (123) is affixed with U-shaped supporting seat (13).
5. by the hydrodynamic performance measuring mechanism in stability test device in the ship model wave described in claim 1 or 2, it is characterized in that: described axis of pitch (14) is connected by coupler one (25) with the projecting shaft of rotational potentiometer one (15), axis of roll (16) is connected by coupler two (26) with the projecting shaft of rotational potentiometer two (18).
6., by the hydrodynamic performance measuring mechanism in stability test device in ship model wave according to claim 3, it is characterized in that: described vertical lines guideway (23) adopts the load linear rolling guides such as four directions.
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| CN201410362454.3A CN104118532B (en) | 2014-07-28 | 2014-07-28 | Hydrodynamic performance measuring mechanism in ship model wave in stability test device |
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| CN105222960B (en) * | 2015-11-13 | 2018-04-06 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of wind-tunnel support system bascule |
| CN106289722A (en) * | 2016-09-12 | 2017-01-04 | 哈尔滨工程大学 | Ship model cross force and horizontal righting moment measuring instrument |
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| CN112093002B (en) * | 2020-09-27 | 2021-08-24 | 中国船舶科学研究中心 | Forced rolling test device for water surface model |
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| CN113401305B (en) * | 2021-07-20 | 2022-05-20 | 华中科技大学 | Device and method for measuring hydrostatic property of ship model |
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