CN105758608B - A kind of ship pond collision test method - Google Patents
A kind of ship pond collision test method Download PDFInfo
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- CN105758608B CN105758608B CN201610286487.3A CN201610286487A CN105758608B CN 105758608 B CN105758608 B CN 105758608B CN 201610286487 A CN201610286487 A CN 201610286487A CN 105758608 B CN105758608 B CN 105758608B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
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Abstract
The present invention relates to a kind of ship pond collision test method, specific steps include: that collided ship model 1) is moved into impingement position, and two root systems pool rope is straightened, makes collided ship model to be in static floating state by breakhead degree, loosen two root systems pool rope；2) with trailer traction hit ship model reach after predetermined stroke speed with collided ship model collision, at this time, hitting two wirerope of ship model posture for control and be broken in end-rack is connected to before trailer truss, trailer brakes are until stop, the data of force snesor and acceleration transducer after acquisition shock, analysis obtain impact force time-history curves and collided ship model acceleration response time-history curves in knockout process；3) adjustment hits ship model speed, collided ship model floading condition, by breakhead degree and fore body form, carries out bump test again.Method of the invention can carry out the collision effect verifying under the conditions of different stroke speeds, preferably reflect marine true shock environment, risk is small, at low cost, flexible and convenient operation.
Description
Technical field
The invention belongs to shipbuilding technical field, in particular to a kind of ship pond collision test method.
Background technique
Since earlier 1960s, it has been successively performed many ship collision tests all over the world.1960 to
1976, the researcher of Italy, Germany and Japan carried out a series of model tests, and main purpose is for nuclear-powered ship
Design, so that nuclear power unit is protected against collsion damage.
The German impact test (Woisin, 1979) for successively completing 12 ship models, model scale is from 1/12 to 1/
17.5 etc., stem is hit under inclination rail free skating.Test result discovery hits stem and is subject to serious collsion damage
Deformation, being primarily due to collided ship ship side structure is designed as safeguard structure, and rigidity is considerably beyond hitting stem.
Italy has carried out 24 model tests altogether, resists different type ship collision to detect different type ship side structure
Effective percentage.It hits stem to glide along an inclined ramp, then collide with the ship side structure model on trolley, trolley can edge
Horizontal rail moves freely.In order to consider the influence of water around collided ship, fin is set up on trolley, fin then immerses left and right sides
Sink in.Model scale used by testing is 1/15 and 1/10.
Japan completes the research project for lasting 7 years (1991-1997), seminar oil carrier structure in the nineties
Collision fracture failure and its caused petroleum leak problem.The research focuses on two aspects, first is that hull
The dynamic process of structural collision (or stranded) damage；Second is that petroleum leaks or the process of Analyses for Seawater Intrusion damage.In November, 1997, day
Originally, Holland and German tripartite cooperate to have carried out new ship-ship collision test, and participate in impact test is two 1500 tons of oil carriers,
It hits bow and uses " hard " ball nose, the topside duplex shell structure model of installation standard VLCC in the middle part of collided ship.
Tan Zhong China, the current country has carried out the pond collision and the research of air impact test of ship's physical scale model, and the experiment is simultaneously
Shock between non-ship and ship, and the force snesor for being installed in ship bow portion hits rigid plate, it is main to inquire into two kinds of collisions
The difference of impact force under mode.
Due to ship collision phenomenon and its complexity, many details can not be expressed with theoretical model, so carry out examination
Research is tested to be necessary.Available reliable data, obtain correct conclusion from test.Although real foul test is ship
Most accurately and reliably method in oceangoing ship Study on Crash Safety, but it is a kind of extremely expensive failure test, it is difficult to implement.Condition
And the strong nonlinearity feature of collision problem itself and the uncertainty of impact conditions also determine test result in the presence of very big
Limitation.Ship collision is a strong nonlinearity problem, and the law of similitude is extremely important in the model test of ship collision, and small ruler
The coverboard of coverboard rupture and real ship in degree scale model ruptures and does not meet similarity rules, some components in scaled model again
Usually it is deleted, so, the test result of scaled model is generally difficult to be directly used in the real foul process of simulation.
Summary of the invention
Goal of the invention of the invention is to provide a kind of ship pond collision test method, can carry out different stroke speeds,
Collision effect verifying under the conditions of projected angle of impact, fore body form, preferably reflect it is marine true hit environment, risk is small,
It is at low cost, flexible and convenient operation.
The specific technical solution of the present invention is a kind of ship pond collision test method, and the experimental rig of use includes traction
Device, mooring gear and data collection system, which is characterized in that
The towing device includes hitting ship model, traction truss and traction wirerope, the shock ship model packet
The fore body and main hull and guide blot, the isolated fore body and main hull for including separation are connected to one by guide blot
It rises, fore body and main hull can slide on hitting length direction of the ship model along ship, and the traction truss installa-tion is in ship
On the trailer in pond, traction truss has preceding end-rack and rear end-rack, and the main hull for hitting ship model passes through four traction wirerope
It is connect with traction truss, wherein before having two traction wirerope to be symmetrically connected in end-rack, another two traction wirerope are symmetrical
Ground is connected in rear end-rack,
The mooring gear includes collided ship model and mooring rope, and the mooring rope has two, two root systems pool rope
One end is tied up to respectively on collided ship model both ends, and the other end of two root systems pool rope ties up to the two of pond on the bank respectively,
The data collection system includes force snesor and multiple acceleration transducers, and the force snesor is mounted on
Between the isolated fore body and main hull of the shock ship model, multiple sensors are fixed in collided ship model
In mounting base, mounting base is connect with the hull rigidity of collided ship model,
The specific steps of the collision method include:
1) collided ship model is moved into impingement position, two root systems pool rope is straightened, makes collided ship model to be in by breakhead degree
Static floating state loosens two root systems pool rope；
2) with trailer traction hit ship model reach after stroke speed with collided ship model collision, at this point, being connected to traction
In the preceding end-rack of truss two traction wirerope fracture, trailer brakes until stop, acquisition collision front and back force snesor and
The output data of multiple acceleration transducers, when obtaining the impact force time-history curves and collided ship model acceleration in knockout process
Journey curve；
Further, after the step 2), adjustment is hit the speed of ship model, collided ship model floading condition, is hit
Angle and the fore body form for hitting ship model, carry out bump test by step 1) and 2) again.
Further, the traction wirerope is the seizing wire that diameter is 1mm, and material is 60# high-carbon steel, dynamic
Breaking load is less than 20Kgf.
Further, the material of the mooring rope is nylon rope.
The beneficial effects of the present invention are:
1) compared with the test of real scale ship collision, risk is small, at low cost；
2) hitting ship model can require to complete reduced scale design based on real ship size and navigation, and by trailer traction, can
Carry out the collision effect verifying under the conditions of different projected angle of impact, stroke speed, compared with using power drive ship model, flexible operation
It is convenient, it is conducive to ship model pose adjustment；In addition, the traction for hitting ship model at present is fixed using wirerope in the process, hit to two ships
It hits simultaneously, wirerope can be realized automatic fracture, preferably reflect marine true shock environment；
3) collided ship model takes steel construction, can carry out impact force and structure dynamic response measurement, be able to verify that sea
Hit the structural response feature under environmental condition；Meanwhile the mooring scheme of collided ship model can carry out different projected angle of impact items
Collision effect verifying under part, flexible and convenient operation.
Detailed description of the invention
Fig. 1 is the towing device structural schematic diagram that ship pond collision test method of the invention uses；
Fig. 2 is the structural representation of the shock ship model for the towing device that ship pond collision test method of the invention uses
Figure；
Fig. 3 is the mooring gear structural schematic diagram that ship pond collision test method of the invention uses.
Specific embodiment
Technical solution of the present invention is further described with reference to the accompanying drawings of the specification.
As shown in attached drawing 1-2, the experimental rig that ship pond collision test method of the invention uses include towing device,
Mooring gear and data collection system.
The towing device includes hitting ship model 11, traction truss 12 and traction wirerope 13, the shock ship
Model includes isolated fore body 111 and main hull 112 and guide blot 113, and the isolated fore body and main hull passes through
Guide blot links together, and fore body and main hull can slide on hitting length direction of the ship model along ship, and described drags
With truss installa-tion on the trailer in ship pond, traction truss has preceding end-rack and rear end-rack, and the main hull for hitting ship model is logical
Four traction wirerope are crossed to connect with traction truss, wherein before thering are two traction wirerope to be symmetrically connected in end-rack, another two
Root traction wirerope is symmetrically connected in rear end-rack.The form of fore body can be a variety of such as wedge-shaped and spherical, difference
The form of corresponding ship form not, different fore bodies generates different impact effects.It is 1mm's that the traction wirerope, which is diameter,
Seizing wire, material are 60# high-carbon steel, and dynamic Breaking load is less than 20Kgf.Two traction wirerope before being connected in end-rack
Play traction and (is primarily subjected to towed load, pulling force is to hit ship model drag size to be connected to rear end in 10Kgf or less)
Two traction wirerope on frame are not subject to towed load, function only as ensuring to hit ship model in the effect of lateral stability
(giving lesser pretightning force, it is made to be initially tensioning state).
Ship model is hit once hitting collided ship model, and impact force is much larger than 100Kgf (measured result), is also just much larger than
The dynamic Breaking load of traction wirerope, the traction wirerope fracture of front end two, hits ship model in the effect of impact force load
Under, it may occur that backward or the trend of yaw motion, also it is broken in succession so as to cause rear end traction wirerope.
The mooring gear includes collided ship model 21 and mooring rope 22, and the mooring rope has two, two root systems pool
One end of rope is tied up to respectively on collided ship model both ends, and the other end of two root systems pool rope ties up to the two of pond on the bank respectively.It is described
Mooring rope material be nylon rope.
The data collection system includes force snesor 3 and three acceleration transducers, the force snesor installation
Between the isolated fore body and main hull of the shock ship model, three sensors are fixed in collided ship model
Mounting base on, mounting base is connect with the hull rigidity of collided ship model.
The specific steps of ship pond collision test method of the invention include:
1) collided ship model is moved into impingement position, two root systems pool rope is straightened, makes collided ship model to be in by breakhead degree
Static floating state loosens two root systems pool rope；
2) with trailer traction hit ship model reach after stroke speed with collided ship model collision, at this point, being connected to traction
In the preceding end-rack of truss two traction wirerope fracture, trailer brakes until stop, acquisition collision front and back force snesor and
The output data of three acceleration transducers, the impact force time-history curves and collided ship model acceleration obtained in knockout process pass
The acceleration-time curve of sensor layout points；
3) it adjusts collided ship model attitude and by breakhead degree, carries out bump test again.Specific method is with two nylon
Mooring rope (each one of head and the tail) makes collided ship model be in different postures (0 °, 30 °, 60 ° and 90 °), after the water surface is completely tranquil,
Collided ship model is completely in static floating state, and two nylon mooring ropes are loosened, collided ship model is made to be in free state,
To guarantee that collided ship model is in complete free state when impact test, it is ensured that impact test impact force and acceleration responsive are surveyed
The validity of test result.
Claims (4)
1. a kind of ship pond collision test method, the experimental rig of use includes towing device, mooring gear and data acquisition
System, which is characterized in that
The towing device includes hitting ship model, traction truss and traction wirerope, and the shock ship model includes point
From fore body and main hull and guide blot, the isolated fore body and main hull linked together by guide blot,
Fore body and main hull can slide on hitting length direction of the ship model along ship, and the traction truss installa-tion is in ship pond
Trailer on, traction truss has preceding end-rack and rear end-rack, hits the main hull of ship model by four traction wirerope and drags
Band truss connects, wherein before having two traction wirerope to be symmetrically connected in end-rack, another two traction wirerope symmetrically connect
It connects in rear end-rack,
The mooring gear includes collided ship model and mooring rope, and the mooring rope has two, one end of two root systems pool rope
It being tied up on collided ship model both ends respectively, the other end of two root systems pool rope ties up to the fixing end of pond two sides respectively,
The data collection system includes force snesor and multiple acceleration transducers, and the force snesor is mounted on described
Shock ship model isolated fore body and main hull between, the acceleration transducer is fixed on the peace in collided ship model
It filling on seat, mounting base is connect with the hull rigidity of collided ship model,
The specific steps of the ship pond collision test method include:
1) collided ship model is moved into impingement position, two root systems pool rope is straightened, make collided ship model to be in static by breakhead degree
Floating state loosens two root systems pool rope；
2) with trailer traction hit ship model reach after stroke speed with collided ship model collision, at this point, being connected to traction truss
Preceding end-rack on the fracture of two traction wirerope, trailer brakes are until stop, the force snesor and multiple of acquisition collision front and back
The output data of acceleration transducer obtains the impact force time-history curves and collided ship model acceleration time-histories song in knockout process
Line.
2. a kind of ship pond as described in claim 1 collision test method, which is characterized in that after the step 2),
Speed, collided ship model floading condition, projected angle of impact and the fore body form for hitting ship model of ship model are hit in adjustment, again by step
1) and 2) rapid to carry out bump test.
3. a kind of ship pond collision test method as claimed in claim 2, which is characterized in that the traction wirerope is
Diameter is the seizing wire of 1mm, and material is 60# high-carbon steel, and dynamic Breaking load is less than 20Kgf.
4. a kind of ship pond as claimed in claim 3 collision test method, which is characterized in that the material of the mooring rope
For nylon rope.
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| CN201610286487.3A CN105758608B (en) | 2016-05-03 | 2016-05-03 | A kind of ship pond collision test method |
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| CN108068992B (en) * | 2016-11-10 | 2020-06-02 | 浙江海洋大学 | Hull ultimate strength experimental device |
| CN107607282A (en) * | 2017-08-18 | 2018-01-19 | 浙江海洋大学 | Tanker oceangoing ship collision experiment device and its experimental method |
| CN108195540A (en) * | 2017-11-28 | 2018-06-22 | 浙江海洋大学 | The carrier fluid ship collision experimental rig and test method of Multi-parameter coupling |
| CN108750002B (en) * | 2018-04-12 | 2020-03-31 | 江苏科技大学 | Simplified calculation simulation device and simulation method for ship ice collision in aqueous medium |
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| CN108613788B (en) * | 2018-07-27 | 2020-04-21 | 武汉理工大学 | Ship-ship model collision experiment system and experiment method thereof |
| CN109141800B (en) * | 2018-09-30 | 2019-08-30 | 武汉理工大学 | The ship collision experimental provision and method of controlled speed and angle |
| CN110095254B (en) * | 2019-06-11 | 2020-08-25 | 江苏科技大学 | Ship ice collision pool experimental device |
| CN112572719B (en) * | 2020-12-11 | 2022-10-11 | 中国特种飞行器研究所 | Emergency floating test release control device for underwater vehicle model |
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