CN104118532A - Hydrodynamic performance measuring mechanism in stability testing device for ship model in waves - Google Patents
Hydrodynamic performance measuring mechanism in stability testing device for ship model in waves Download PDFInfo
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- CN104118532A CN104118532A CN201410362454.3A CN201410362454A CN104118532A CN 104118532 A CN104118532 A CN 104118532A CN 201410362454 A CN201410362454 A CN 201410362454A CN 104118532 A CN104118532 A CN 104118532A
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Abstract
The invention discloses a hydrodynamic performance measuring mechanism in a stability testing device for a ship model in waves. The hydrodynamic performance measuring mechanism comprises a base supported by a trailer measuring bridge in a sliding mode, a supporting frame penetrates through the base and is fixedly connected with the base, a pulley at the upper end of the supporting frame is provided with a steel wire rope in a winding mode, one end of the steel wire rope is connected with a balance weight, and the other end of the steel wire rope is connected with a heaving rod. The heaving rod penetrates through the base and can slide up and down, the heavy rod is fixedly connected with a middle bracing wire extending end in a bracing wire type sensor, the bottom end of the heavy rod is sequentially provided with a three-component force sensor and a supporting seat, the two side walls of the supporting seat are provided with pitching shaft, and the pitching shaft and a rolling shaft form a cross-shaped shaft. The rolling shaft is arranged on fixed seats on the two sides of the supporting seat in an erected mode, and the pitching shaft and the rolling shaft are connected with rotational potentiometers. The other end of the rolling shaft is sequentially connected with a rolling torque sensor and a rolling locking device. According to the hydrodynamic performance measuring mechanism, the longitudinal force, the transverse force, the yawing torque, the pitching displacement and the heaving displacement of the ship model can be measured, and the yawning torque or the rolling displacement can be measured through locking or unlocking of rolling movement.
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 boats and ships wave stability research, relate in particular 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 are subject to External Force Acting to depart from it and top-up balance position and tilt, after disappearing, external force can return to the ability of former balance position, the ship with this ability is stable, otherwise be unsettled 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, only can measure longitudinal force, pitching displacement and hang down and to swing displacement, and be only suitable for the rapidity seaworthiness test in the wave of heading sea, yet, in wave, carry out the measurement of lever arm of stability, simulation except ship model navigation and wave in necessary consideration rough water quality model test, 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 needing ship model can be free-moving in vertical and pitching direction, can also to become heel hydrodynamic test simultaneously, to can measure the transverse force that relates in Stability of Ship research, transverse force, the measurement of yawing moment and rolling moment, simultaneously can also side porch pitching displacement, hang down and swing even rolling displacement of displacement, the measurement mechanism that also there is no at present stability test in this ship model wave.
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 be realized ship model longitudinal force, transverse force, yawing moment, pitching displacement, hang down and swing the measurement of displacement and rolling displacement, also can realize longitudinal force, transverse force, yawing moment, pitching displacement, the vertical measurement of swinging displacement and rolling moment determined under angle of heel.
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 slidably trailer and survey the pedestal on bridge, 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, on pulley, be 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 are affixed, the lower end of weight linear meter is installed with pallet, pallet is used for placing counterweight, on pedestal, be fixed with stay-supported type displacement sensor, the bracing wire external part of stay-supported type displacement sensor is fixed on heave bar, and described bracing wire is vertical layout, three component sensors are equipped with in the bottom of heave bar, and three component sensor belows are connected with supporting seat, on the two side of supporting seat, by bearing arrangement, have set up axis of pitch, 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 on the permanent seat of supporting seat both sides by bearing arrangement, 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:
Described supporting seat is U-shaped structure, on the two side of U-shaped supporting seat, by bearing arrangement, has set up axis of pitch, and the two ends of axis of roll are erected on the permanent seat of the U-shaped opening of U-shaped supporting seat both sides by bearing arrangement.
Described guiding mechanism comprises the vertical lines guideway being located on bracing frame, and the slide block in heave bar and vertical lines guideway is affixed.
Described three component sensors are combined sensor structure, comprise separate longitudinal force sensor, yawing torque sensor and the transverse force sensor of arranging successively from top to bottom, three independently connect by butt flange between sensor, longitudinal force sensor and heave bar are affixed, and transverse force sensor and U-shaped supporting seat are 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 adopt four directions to etc. load linear rolling guide.
Technique effect of the present invention:
In measuring mechanism of the present invention, ship model is free-moving in vertical and pitching direction, can also become heel hydrodynamic test simultaneously, by the setting of many component force transducer, can in Obtaining Accurate wave, act on the three kinds of hydrodynamic performances of longitudinal force, transverse force, yawing moment on ship model, by the setting of axis of pitch and rotational potentiometer, casterangle can be measured, by the setting of zip mode displacement pickup, the heave displacement except massage can be measured, the present invention arranges rolling positioning seat and rolling calibration locking plate, and can lock or unclamp between the two, thereby motion in rolling direction is tied or unfettered, thus when rolling motion is tied, can carry out determining angle of heel hydrodynamic test, except measuring the longitudinal force acting on ship model, transverse force, heave displacement and the casterangle of yawing moment and ship model, can also act on the rolling moment on ship model by rolling moment sensor measurement, when rolling motion is unfettered, except measuring the longitudinal force acting on ship model, transverse force, heave displacement and the casterangle of yawing moment and ship model, can also be by the angle of heel of measuring ship model that arranges of axis of roll and rotational potentiometer.The measurement that is measured as lever arm of stability in ship model wave of multiple hydrodynamic performance provides more perfect side Lijing basis, and then provides more perfect basic guarantee for the pure stability research of boats and ships.
The present invention has adopted trailing type weight balancing structure in the measurement process of carrying out hydrodynamic performance, the impact that the own wt that has overcome the measurement components such as heave bar, three component sensors, U-shaped supporting seat produces heave displacement measurement, and the displacement of counterweight has adopted guide holder guiding, in process of the test, can not rock with trailer high-speed motion, thereby improve the stability of measuring; In process of the test, the catenary motion of heave bar by the four directions on bracing frame to etc. load linear rolling guide lead, its load-carrying capacity is large, guiding accuracy is high, in the time of can preventing from testing trailer accelerate and retaining segment because the heavy load that acceleration/deceleration produces causes damage to measuring equipment and tested model.
The present invention adopts longitudinal force sensor, yawing torque sensor and three of transverse force sensor independently between sensor, to be combined to form three component sensors, described three independently sensor all adopt strain gauge transducer, the sensor of this sectional construction not only overload capacity is large, 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 component sensor lower ends.
Fig. 4 is the lateral plan of Fig. 3.
Fig. 5 is the structural representation of three component sensors 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 component sensors; 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, trailer is surveyed bridge; 28, locking jaw; 29, ear seat; 30, mount pad two; 31, mount pad three; 32, connecting bolt.
The specific embodiment
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 slidably trailer and survey the pedestal 1 on bridge 27, particularly, pedestal 1 can be slidably connected at trailer by line slideway auxiliary and survey on bridge 27, pedestal 1 is provided with locking jaw 28, the locking of surveying bridge 27 for pedestal 1 and trailer, bracing frame 2 is through pedestal 1 and affixed with pedestal 1, pedestal 1 upper end is installed with a pair of mount pad 1, mount pad 1 is equipped with pulley 4 by bearing arrangement, on pulley 4, be 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 one sides is for the heave bar 7 of balance rope 5 opposite sides and with the weight of the measurement mechanism of heave bar 7 dipping and heaving, on pedestal 1, be 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 component sensors 12 are equipped with in the bottom of heave bar 7, three component sensor 12 belows are connected with supporting seat 13, see Fig. 3, Fig. 4, described supporting seat 13 is U-shaped structure, on the two side of U-shaped supporting seat 13, by bearing arrangement, set up axis of pitch 14, axis of pitch 14 one end pass 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 on the permanent seat 17 of U-shaped supporting seat 13U type opening both sides by bearing arrangement, axis of roll 16 one end are 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 ends are 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, between rolling moment sensor 19 and rolling positioning seat 20, all by butt flange, realize and being connected, 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 heads connect and rolling calibration locking plate 21 form rolling catch gear, by locking or release connection between rolling positioning seat 20 and rolling calibration locking plate 21, lock or discharge rolling motion, particularly, between rolling positioning seat 20 and rolling calibration locking plate 21, be provided with connecting bolt 32, 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 being located on bracing frame 2, heave bar 7 is affixed with the slide block 24 in vertical lines guideway 23, wherein, then calibration location on rolling calibration locking plate 21 is fixed with fix screw with positioning lock adjustment by calibration knock hole on rolling calibration locking plate 21, belongs to prior art.
Particularly, see Fig. 5, described three component sensors 12 are combined sensor structure, comprise the separate longitudinal force sensor 121 of arranging successively from top to bottom, yawing torque sensor 122 and transverse force sensor 123, described three independently connect by butt flange between sensor, described three independently sensor all adopt strain gauge transducer, the sensor of this sectional construction not only overload capacity is large, 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, while preventing from testing trailer accelerate and retaining segment because the heavy load that acceleration/accel produces causes damage to measuring equipment and tested ship model, described vertical lines guideway 23 adopt cubic to etc. load linear rolling guide.
Operation scheme of the present invention is as follows:
Before measurement, ship model (can be also the water surface model of other types) and connecting panel 22 is affixed, and the center-of-gravity position of the close as far as possible ship model in the two fixing position, the course of guaranteeing ship model is consistent with the working direction of towing tank trailer, the weight of counterweight 10 (comprises three component sensors 12 according to heave bar 7 and the measurement mechanism that is packed in heave bar 7 lower ends, axis of pitch 14, axis of roll 16, supporting seat 13, permanent seat 17, revolve potential device 1, revolve potential device 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, make tested ship model be adjusted to required angle of heel, and make rolling positioning seat 20 and 21 lockings of rolling calibration locking plate by connecting bolt 32, by axis of roll 16 lockings, thereby the rolling motion of constraint ship model, ship model under trailer drives in Motion Waves, by three component sensors 12, can measure 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, by rolling moment sensor 19, can measure the rolling moment acting on ship model, by the change of gait of march, can measure the longitudinal force of tested ship model under different gait of march, transverse force, rolling moment and yawing moment, in motion process, when tested ship model generation heave changes, tested ship model drives heave bar 7 to move up and down, ear seat 29 by heave bar 7 lower ends pulls stay-supported type displacement sensor 11, measure the heave movement track of heave bar 7, by corresponding data collection and analysis process control system, gathered the output signal of stay-supported type displacement sensor 11, thus the heave displacement that records 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 ends, axis of pitch 14 rotates around the central axis of axis of pitch 14 with the integral body that axis of roll 16 forms, axis of pitch 14 rotates, under the transfer function of coupler 1, the resistance of rotational potentiometer 1 changes, by data collection and analysis process control system, gathered the resistance variations of rotational potentiometer 1, thereby record the trim angle of tested ship model.
Hydrodynamic measurement when rolling motion is uncommitted: 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 and under this gait of march, be acted on longitudinal force, transverse force and the yawing moment on tested ship model determining ship model under angle of heel by three component sensors 12 under trailer drives, in motion process, when tested ship model generation heave changes, tested ship model drives heave bar 7 to move up and down, ear seat 29 by heave bar 7 lower ends pulls stay-supported type displacement sensor 11, measure the heave movement track of heave bar 7, by corresponding data collection and analysis process control system, gathered the output signal of stay-supported type displacement sensor 11, thus the heave displacement that records 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 ends, axis of pitch 14 rotates around the central axis of axis of pitch 14 with the integral body that axis of roll 16 forms, axis of pitch 14 rotates, under the transfer function of coupler 1, the resistance of rotational potentiometer 1 changes, by data collection and analysis process control system, gathered the resistance variations of rotational potentiometer 1, thereby 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 ends, axis of pitch 14 rotates around the central axis of axis of roll 16 with the integral body that axis of roll 16 forms, rotational potentiometer 2 18 rotates around the central axis of axis of roll 16, the resistance of rotational potentiometer 2 18 changes, by data collection and analysis process control system, gathered the resistance variations of rotational potentiometer 2 18, thereby record the angle of heel of tested ship model.
The present invention has adopted trailing type weight balancing structure in the measurement process of carrying out hydrodynamic performance, the impact that the own wt that has overcome the measurement components such as heave bar, three component sensors, U-shaped supporting seat produces heave displacement measurement, has improved the precision measured and the stability of measurement.
More than describing is explanation of the invention, is not the restriction to invention, and limited range of the present invention, referring to claim, within protection scope of the present invention, can be done any type of modification.
Claims (6)
1. the hydrodynamic performance measuring mechanism in stability test device in ship model wave, comprise across and be supported on slidably trailer and survey the pedestal (1) on bridge (27), it is characterized in that: bracing frame (2) is through pedestal (1) and affixed with 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, on pulley (4), be 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) 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), on pedestal (1), be fixed with stay-supported type displacement sensor (11), it is upper that 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 component sensors (12) are equipped with in the bottom of heave bar (7), three component sensor (12) belows are connected with supporting seat (13), on the two side of supporting seat (13), by bearing arrangement, set up axis of pitch (14), 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, it is upper that 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 claimed in claim 1, it is characterized in that: described supporting seat (13) is U-shaped structure, on the two side of U-shaped supporting seat (13), by bearing arrangement, set up axis of pitch (14), the two ends of axis of roll (16) are erected on the permanent seat (17) of the U-shaped opening of U-shaped supporting seat (13) both sides by bearing arrangement.
3. by the hydrodynamic performance measuring mechanism in stability test device in ship model wave claimed in claim 1, it is characterized in that: described guiding mechanism comprises the vertical lines guideway (23) being 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 claimed in claim 1, it is characterized in that: described three component sensors (12) are combined sensor structure, comprise separate longitudinal force sensor (121), yawing torque sensor (122) and the transverse force sensor (123) of arranging successively from top to bottom, three independently connect 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 claimed in claim 3, it is characterized in that: described vertical lines guideway (23) adopt four directions to etc. load linear rolling guide.
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