Poolvoir to test ship models, primarily, in ice conditions

FIELD: transport, auxiliary ship equipment.

SUBSTANCE: proposed test pool comprises the bottom simulation plant including submerged suspended support made up of assemblage of identical support sections arranged across the channel and distributed over its length. Aforesaid sections are suspended with adjusting tie-rods jointed to their length adjustment devices arranged on the channel walls sides. False bottom is mounted and rigidly attached to the said suspended support. The bottom simulation plant can vary the false bottom inclination towards horizontal plane in both the channel lengthwise direction α° till , and crosswise direction β° till , where L is the length of assembled bottom simulator, B is the bottom simulator width, HB is channel water depth, HD is the deepest bottom point, α° and β° are the angles of inclination of false bottom in lengthwise and crosswise directions, respectively. The total area of sections across the channel of support sections of the bottom simulator makes, at least, 0.05 of false bottom area in plan, while the false bottom width does not exceed 0.75 of the channel width. The false bottom is arranged in the channel symmetrically relative to the channel lengthwise axis.

EFFECT: higher efficiency of using ice test pool.

3 cl, 2 dwg

 

The invention relates to the field of shipbuilding, and more particularly to experimental hydromechanics vehicle, and relates to equipment for carrying out their hydrodynamic and ice research.

Intensive use of icebreakers and ice ships in shallow water in ice conditions, i.e. conditions in which the ratio of the depth of the reservoir to the draught of the vessel is less than 5, creates a wide range of tasks for experimental study in a towing tank basin interactions with ice these objects and predict the resulting loads in different ice conditions, shallow water, characteristic of those areas where they are used.

Known for the water tank for testing models of ships and other marine engineering structures, made by awts of the USSR №1000817, CL G01M 10/00 containing a water-filled channel and a tow Dolly with electric drive and running wheels in contact with the rails laid along the canal, with a device for pinning models, kinematic, torque and recording equipment.

A disadvantage of the known device is the inability to create on the surface of water ice and, therefore, tests of models of icebreakers and vessels in ice conditions.

Known for the water tank for testing models shipbuilding and marine engineering structures, mostly, ice conditions, containing the refrigerating chamber with a water-filled channel on the surface of which is formed by the ice field, the refrigerating machine with cooling system of the ice chamber, palisano attached to the installation with the possibility of its regulation in depth, and a tow Dolly with electric drive and running wheels in contact with the rails laid along the canal, with a device for pinning models, the speed sensor truck, torque and recording equipment (see RF patent №2112689 on application No. 96114824 from 23.07.1996 g)adopted for the prototype. Ice the water tank is widely used for studying the processes of interaction with ice breakers, ice ships and other marine structures and predict the resulting loads in different ice conditions typical of those areas where they operated. These tests have several limitations.

A disadvantage of the known devices is the inability to test models of icebreakers and ships in ice in shallow water conditions, i.e. the design of the pool and the technology to create ice fields do not allow you to change the depth of the water by pumping last more than 5% from nominal, and simulation of shallow water required to drain the t 50% to 90% of the water from the pool, and this is a big expense. False fixed to installation in the channel, has limited dimensions and creates the effect of a shallow water model only attached to the installation over fallstrom, and therefore stationary relative to the model during testing. This type of testing in shallow water is only suitable for marine engineering structures, fixed with respect to the bottom, such as drilling platforms, loading terminals, etc.

In addition, there is provided the possibility to simulate the operational conditions of navigation at the entrance of the vessel in shallow water and, accordingly, the output at depth, as well as when the vessel along the inclined edge of the sea channel.

The claimed invention solves the problem of increasing the efficiency of the ice model basin by providing opportunities model testing of ice-breakers and ice ships in different ice conditions in deep and shallow water and transition with depth in shallow water and Vice versa, and when the presence of the inclined edges of the shipping channel.

For this famous ice the water tank is equipped with installing imitation bottom, including submerged outboard bearing, composed by the same reference sections positioned across the channel and distributed along its length, which hung on R is egulirovannyh rods, located and fixed on a hanging support false and connected with the said rods regulators of their length located and secured on the sides on the walls of the channel. Installing imitation bottom made with the possibility of changing the angle of inclination palsana to the horizontal in the longitudinal direction of the channel α°and in the transverse direction of the channel β°where L is the length of the assembled simulator bottom - width simulator bottom, Hin- water depth in the channel, HDthe depth of the highest point of the bottom of α° β° - angles palsana respectively in the longitudinal and transverse directions. Moreover, the total surface area of the cross sections across the channel of the support sections of the installation simulate the bottom is not less than 0.05 square palsana in the plan, and the width palsana does not exceed 0,75 channel width. This false is located in the channel symmetrically relative to the longitudinal axis of the channel.

In addition, palisano made with the possibility of changing its length.

Along with this false consists of separate, rigidly fastened together sections.

The installation simulate the bottom with the possibility of changing the angle of inclination palsana to the horizontal in the longitudinal direction of the channel allows the modeling of phenomena in the transition vessel with depth at Melk is wodie and Vice versa, and with the possibility to change the angle of palsana to the horizontal in the transverse direction of the channel allows the modeling of phenomena arising from the movement of the vessel along the inclined edges of the seabed.

The sizes of outboard supports, the total surface area of the cross section of which is across the channel is not less than 0.05 square palsana in the plan chosen from the condition of providing damping their longitudinal vibrations palsana.

The width constraint palsana not exceeding 0,75 channel width, and location palsana symmetrically relative to the longitudinal axis of the channel due to the need to meet the technological and hydrological functions of the systems ice pools in the process of numerazione ice fields on the surface of the water, in particular, to ensure the circulation of water in the space between the channel walls and fallstrom, an effective system of bubbling, etc.

The invention is illustrated by drawings, where figure 1 shows a portion of a water-filled channel of the water tank; figure 2 is a fragment of the cross-section of the water tank.

The device (figure 1 and 2) contains the refrigerating chamber and the refrigerating machine with cooling system of the ice chamber (not shown), concrete channel 1, filled with water 2, on the surface of which is formed by the ice field 3, is laid along the channel d is si 4, which moves through the electric towing truck 5 having a device for securing models, the speed sensor truck, torque and recording equipment (not shown), the simulator bottom with false 6, which is rigidly connected with a set of outboard bearings 7, which are located across the channel and mounted on the adjusting rods 8, which are connected with length Adjusters 9, fixed on the sides along the channel walls.

False 6 is made as a rectangular flat floor, for example, from a sheet material of a width of 0.75 the width of the channel, supported by a set of, for example, of a metal profile, with the purpose of increasing the rigidity of the installation, which is located symmetrically relative to the longitudinal axis of the channel. Design palsana 6 consists of a single, rigidly connected to each other sections, therefore, allows for the installation of the simulator bottom of variable length from one section to the maximum length depending on the given conditions of the experiment.

Outboard bearing 7, which is intended for fastening on her palsana made in the form of a set of beams with considerable rigidity. The number of beams selected from the calculation of the permissible deflections palsana in migration between them.

The adjusting rod 8, designed for positioning palsana on the given conditions of the experiment the depth and at the required angle, made in the form of flexible connections, such as chains, passing through, for example, the blocks 10 in the wall of the channel (figure 2)with a length Adjusters 9, fixed to the walls of the channel, and represents a screw or hydraulic tensioning device, capable of withstanding the weight of the installation simulate the bottom falling on them. Pull - chain 8 are fixed to the length Adjusters 9, for example, lifting shackle or carabiner with lock.

The design of the outboard bearing, the adjusting rods 8 and specifications of length Adjusters 9 provide the ability to adjust the location palsana depth under water in the range from the surface to the bottom of the channel with an accuracy of ±10 mm, and the arrangement of the simulator DNA may be in the horizontal plane, and with a given angle, and the inclination is limited by the dimensions of the channel and palsana:

in the longitudinal direction of the channel -,

in the transverse direction of the channel -.

The weight of the structure simulator bottom as a whole must be sufficient to ensure negative buoyancy installed in a submerged position.

The device operates as follows.

On the outboard bearings 7 collect and fix false 6. The installation Assembly is lowered under the water surface by lengthening the rod 8, for example priceplan the m links of the chains on the length Adjusters 9. Then use the sliders 9 false 6 present at the given experimental conditions, the depth of the required angle with the required accuracy. It should be noted that the depth value and the slope of the bottom for each experiment is different. Using chillers with cooling system of the ice chamber on the surface of the water must be ice field 3 or create other ice formations. To the towing carriage 5 is fixed in position the breaker model or vessel, serves meals on a tow truck 5 and the drive, connect the measuring and recording equipment and test models of the vessel. Model tests are conducted in accordance with the requirements of the technical specifications and approved for the ice model basin methods.

To perform the following tests with another model or other requirements to the conditions of the experiment false 6 with regulators length rods 9 put on some given experimental conditions, the depth and with the required angle, and then install preparation for tests and the tests are performed in the manner described above.

1. The water tank for testing ship models mainly in the ice, including the refrigerating chamber with a channel filled with water, on surfaces of which are formed ice field, refrigeration, machines cooling system of the ice chamber, false under the surface of the water, made with the possibility of its regulation in depth, and a tow Dolly with electric drive and the wheels in contact with the rails laid along the channel containing the fixing device under test models, measuring and recording apparatus, characterized in that the pool is equipped with installing imitation bottom, including submerged outboard bearing, composed by the same reference sections positioned across the channel and distributed along its length, which hung on the adjusting rods and located and fixed on a hanging support false and connected with the said rods regulators of their length, located and secured on the sides on the channel walls, and the installation simulate bottom made with the possibility of changing the angle of inclination palsana to the horizontal in the longitudinal direction of the channel α°and in the transverse direction of the channel β°where L is the length of the assembled simulator bottom; width simulator bottom; HB- water depth in the channel; HDthe depth of the highest point of the bottom; α° β° - angles palsana respectively in the longitudinal and transverse directions, and the total surface area of the cross sections across the channel on the priori partitions installation simulate the bottom is not less than 0.05 square palsana in the plan, width palsana does not exceed 0,75 channel width, while false is located in the channel symmetrically relative to the longitudinal axis of the channel.

2. The water tank according to claim 1, characterized in that false made with the possibility of changing its length.

3. The water tank according to claim 2, characterized in that false consists of separate rigidly fastened together sections.



 

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