CN111874261A - Test platform suitable for free surface movement measurement is striden to model - Google Patents
Test platform suitable for free surface movement measurement is striden to model Download PDFInfo
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- 238000005259 measurement Methods 0.000 title claims abstract description 26
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
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- B64F5/60—Testing or inspecting aircraft components or systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
- B63B71/20—Designing vessels; Predicting their performance using towing tanks or model basins for designing
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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
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Abstract
The invention relates to the field of free surface crossing motion tests, in particular to a test platform suitable for free surface crossing motion measurement of a model, which is arranged on a water pool and comprises a sliding seat, a lifting mechanism, an installation mechanism and a force measuring mechanism, wherein the sliding seat is used for carrying the lifting mechanism, the installation mechanism and the force measuring mechanism and can horizontally slide on the water pool; the lifting mechanism is used for driving the model to vertically move, and can enable at least one part of the model to be immersed in the water tank, and one part of the model is higher than the water tank; the mounting mechanism is used for mounting a model and is arranged on the lifting mechanism; the force measuring mechanism is used for measuring the stress of the model, is arranged on the lifting mechanism and is connected with the mounting mechanism through a connecting wire; the model is installed on the installation mechanism, the model is driven to vertically move through the lifting mechanism, the model is carried to horizontally move through the sliding seat, the vertical movement and the horizontal movement are carried out simultaneously, and the stress of the model moving across the free surface is measured by the force measuring mechanism.
Description
Technical Field
The invention relates to the field of free surface crossing motion tests, in particular to a test platform suitable for free surface crossing motion measurement of a model.
Background
Nowadays, the development of airplanes, ships, shallows and related technologies thereof is changing day by day, and the shallows and the related technologies are widely applied to the fields of exploration, search and rescue, communication and the like, but the working and moving states of the equipment are all in the same medium or do not depart from the free surface. With the development of science and technology and higher social requirements, a single-medium space aircraft is difficult to develop in a multidimensional complex environment, so that the research of a multi-medium environment-adaptive cross-medium aircraft which can gracefully cross a free surface like certain fishes or can penetrate into water at a high speed like certain birds becomes an important development direction.
The water-air cross-medium motion needs the cross-medium aircraft to keep the optimal performance in different medium environments, can cross a medium interface for multiple times and fly in the air or sail underwater for a long time, and breaks through the limitation of the traditional single-medium aircraft on the use environment. However, when the aircraft crosses the air-water interface, huge impact load is generated at the initial stage, the aircraft is easy to generate elastic-plastic deformation, and the suddenly increased load also affects the motion state of the aircraft; when the aircraft crosses the water-air interface, the attachment mass force, buoyancy and resistance borne by the aircraft are rapidly reduced, and the speed is rapidly changed, so that the surface pressure distribution of the aircraft is severely changed, a considerable disturbance force and moment are formed, and severe impact and vibration are generated.
In order to better explore and solve the technical key points of the cross-medium aircraft, a test platform suitable for simulating the water entering and exiting of an aircraft model and a biological model is particularly necessary to be built based on a bionic design concept.
Disclosure of Invention
The invention aims to overcome at least one defect of the prior art and provides a test platform suitable for measuring the motion of a model across a free surface, which is used for measuring the stress of an aircraft model or a biological model in the process of simulating water in and out.
The invention adopts the technical scheme that the test platform suitable for measuring the motion of a model across a free surface is arranged on a water pool and comprises a sliding seat, a lifting mechanism, an installation mechanism and a force measuring mechanism,
the sliding seat is used for carrying the lifting mechanism, the mounting mechanism and the force measuring mechanism and can horizontally slide on the water pool;
the lifting mechanism is used for driving the model to vertically move, and can enable at least one part of the model to be immersed in the water tank, and one part of the model is higher than the water tank;
the mounting mechanism is used for mounting a model and is arranged on the lifting mechanism;
the force measuring mechanism is used for measuring the stress of the model, is arranged on the lifting mechanism and is connected with the mounting mechanism through a connecting wire;
the model is installed on the installation mechanism, the model is driven to vertically move through the lifting mechanism, the model is carried to horizontally move through the sliding seat, the vertical movement and the horizontal movement are carried out simultaneously, and the stress of the model moving across the free surface is measured by the force measuring mechanism.
The invention relates to a test platform suitable for measuring the motion of a model across a free surface, in particular to a technology for superposition combination of motion systems, which is used for researching the stress change condition of the model in the motion across the free surface, wherein the model can be a bionic model so as to explore the phenomenon that organisms go out of and enter water, and can also be an aircraft model so as to verify the hydropneumatic performance of an aircraft. The main structure of the test platform is as follows: the device comprises a sliding seat, a lifting mechanism, an installation mechanism and a force measuring mechanism, wherein the sliding seat is arranged above a water pool and horizontally slides on the water pool by carrying the lifting mechanism, the installation mechanism and the force measuring mechanism; the lifting mechanism is connected with the mounting mechanism and the force measuring mechanism and can drive the mounting mechanism and the force measuring mechanism to vertically move in the water tank, so that at least one part of the model can be immersed in the water tank, and one part of the model is higher than the water tank; the mounting mechanism is used for mounting the model and is arranged on the lifting mechanism, so that the model can be fixedly connected in the lifting mechanism; and the force measuring mechanism is arranged on the lifting mechanism and is connected with the mounting mechanism through a connecting wire.
The working process of the test platform suitable for measuring the model cross-free surface motion comprises the following steps: when the model is installed on the installation mechanism, the lifting mechanism drives the model on the installation mechanism to vertically move up and down the pool, so that the model can move across the free surface, meanwhile, the sliding seat carries the model to horizontally slide on the horizontal plane, so that the model can horizontally move, and when the model moves across the free surface, the stress condition of the model can be measured through the traction effect of the connecting line. The invention can realize the superposition combination of two motion states of horizontal motion and vertical motion through the test platform suitable for the measurement of the motion of the model across the free surface, and when the model is installed in the test platform, the simulation bionic model researches the hydro-pneumatic performance of an organism outlet-inlet or an aircraft model through the horizontal motion and the vertical motion of the test platform at a water pool, thereby realizing the measurement of the stress condition of the motion of various models across the free surface.
Further, the lifting mechanism comprises a fixing mechanism, wherein the fixing mechanism is connected with the sliding seat and the lifting mechanism and is used for fixedly connecting the lifting mechanism to the sliding seat.
The lifting mechanism of the invention is not directly connected with the sliding seat, but the sliding seat is connected with the lifting mechanism through the fixing mechanism of the intermediate connecting medium, when the sliding seat realizes the horizontal movement of the model and the lifting mechanism realizes the vertical movement of the model, if the lifting mechanism is directly connected with the sliding seat, the movement condition of the model is the superimposed and combined state of the horizontal movement and the vertical movement, the stress of a single movement state can not be judged, and the test platform is influenced by external factors such as pressure resistance and the like inevitably when moving across the free surface to cause the unstable condition of the test platform, therefore, the fixing mechanism is used as a bridge for connecting the sliding seat and the lifting mechanism, the analysis of the stress condition of the horizontal movement or the vertical movement or the superimposed movement of the model can be realized, and the stability of the test platform can also be ensured, ensuring the accuracy of the measurement.
Further, the sliding seat includes:
a sliding plate for sliding horizontally on the pool;
and the connecting part is arranged on the sliding plate, is connected with the fixing mechanism and is used for carrying the fixing mechanism, the lifting mechanism, the mounting mechanism and the force measuring mechanism.
The sliding seat carries the lifting mechanism, the mounting mechanism and the force measuring mechanism to horizontally slide on the pool, so that the horizontal movement of the model is realized, and the horizontal movement trend of a biological or an aircraft is truly simulated, wherein the sliding seat comprises two parts: the sliding plate can slide on a pool provided with a guide rail through a pulley; the connecting part is arranged on the sliding plate and is used for connecting the fixing mechanism, so that the lifting mechanism connected to the fixing mechanism and the mounting mechanism and the force measuring mechanism arranged on the lifting mechanism jointly realize horizontal movement. The invention can carry the whole test platform to move above the water pool along the track through the sliding plate with the pulley and the connecting part connected with the fixing mechanism, so that the model arranged in the test platform realizes the trend of horizontal movement when moving across the free surface.
Further, at least one part of the sliding plate is a hollow area, and the hollow area enables the fixing mechanism, the lifting mechanism, the mounting mechanism and the force measuring mechanism to penetrate through the sliding plate to move up and down.
At least one part of the sliding plate is a hollow area, the fixing mechanism, the lifting mechanism, the mounting mechanism and the force measuring mechanism are mounted at the hollow area of the sliding plate and can horizontally move through the sliding plate, and the lifting mechanism, the mounting mechanism and the force measuring mechanism are mounted at the hollow area because the sliding plate is higher than the horizontal plane, so that the mounting mechanism and the force measuring mechanism can be controlled to move up and down on the horizontal plane, and the model can horizontally move under the action of the sliding plate and vertically move through the sliding plate under the action of the lifting mechanism.
Further, the lifting mechanism includes:
the connecting rods are movably connected with the fixing mechanism;
the lower end face of the lifting driving column is fixedly connected with the connecting rod, and the upper end of the lifting driving column is connected with the connecting motor and used for driving the lifting mechanism to lift.
The lifting mechanism of the invention realizes the free surface crossing movement of the model by vertical movement up and down in the pool, the lifting mechanism is connected with the fixing mechanism, and the structure of the lifting mechanism mainly comprises: the connecting rod is movably connected with the fixing mechanism, so that the lifting mechanism can keep stable movement in the fixing mechanism along the vertical direction; the lower end of the lifting driving column is fixedly connected with the connecting rod, the upper end of the lifting driving column is connected with the linear motor, and the lifting mechanism is controlled to move up and down through the traction force of the linear motor. The invention realizes the cross-free surface movement of the model above and below the water surface through the lifting mechanism consisting of the connecting rod and the lifting driving column, and the assembly is simple and easy to realize and has wide application prospect.
Further, the mounting mechanism includes: and the cross-shaped mounting bracket is used for mounting inside the model.
The mounting mechanism is mounted in the lifting mechanism and is used for mounting and fixing the model, and particularly comprises a cross mounting bracket which is mounted in the test model and can move along with the front-back movement and rolling of the model. According to the invention, the model is fixed in the lifting mechanism through the cross-shaped mounting bracket, so that the model can vertically move and horizontally move in the test platform.
Further, the installation mechanism further comprises a sliding sleeve rod, and the left end and the right end of the cross-shaped installation support are installed on the connecting rod through the sliding sleeve rod.
The installation mechanism also comprises a sliding sleeve rod, the left end and the right end of the cross-shaped installation support are installed on the connecting rod through the sliding sleeve rod, so that the freedom of horizontal front-back movement of the model can be ensured when the model is installed on the cross-shaped installation support, and the treatment direction and the lateral movement of the model are restrained, thereby being convenient for measuring the stress condition of the model in the test process.
Further, the dynamometer includes first dynamometer and second dynamometer, first dynamometer and second dynamometer installation are fixed on the connecting rod, and pass through the upper and lower both ends horizontally connect of connecting wire and cross installing support respectively.
Aiming at the stress of a model in the water inlet and outlet motion process, the test platform mainly comprises two moment measuring points, namely an upper measuring point and a lower measuring point which are respectively arranged at the upper end and the lower end of a cross mounting bracket, two dynamometer security points are correspondingly arranged facing the two measuring points, the security points are arranged on a connecting rod of a lifting mechanism, and a first dynamometer and a second dynamometer are arranged on the security points, wherein the first dynamometer is horizontally connected with the upper end point of the cross mounting bracket through a connecting wire, the upper stress of the rolling model when the model is impacted by incoming flow can be measured, and the motion stress condition of the model can be analyzed by combining the measuring result of the second dynamometer; the second dynamometer is horizontally connected with the lower end point of the cross mounting bracket through a traction rope, the lower stress of the room when the model is impacted by incoming flow can be measured, and the motion stress condition of the model can be analyzed by combining the measurement result of the first dynamometer.
Further, the fixing mechanism includes:
the fixed bracket is fixedly connected with the connecting part and is used for connecting the fixed mechanism with the sliding seat;
the fixing column is fixedly connected with the fixing support;
the upper surface of the fixing plate is fixedly connected with the lower end of the fixing column; ,
further, the fixing mechanism further includes: and the lower end face of the guide rod is connected with the upper surface of the fixed plate, is parallel to the fixed column, is movably connected with the lifting mechanism and is used for the vertical movement of the lifting structure on the guide rod.
The fixing mechanism comprises a fixing support, a fixing column, a fixing plate and a guide rod, wherein the fixing support is connected with a connecting part on a sliding seat, and the whole fixing mechanism, an installation mechanism and a force measuring mechanism are connected on the sliding seat; the upper part of the fixing column is connected with the fixing bracket, and the lower end of the fixing column is connected with the upper surface of the fixing plate, so that the stability of the test platform can be ensured; the fixed plate is arranged in parallel with the horizontal plane, the upper surface of the fixed plate is provided with a fixed column and a guide rod, and the lifting mechanism, the mounting mechanism and the force measuring mechanism vertically move above the fixed plate; the guide rod is vertically connected with the fixed plate and movably connected with a connecting rod in the lifting mechanism, so that the lifting mechanism can move vertically under the guide action of the guide rod. The fixing mechanism can be fixedly connected with the sliding seat or movably connected with the sliding seat, when the fixing mechanism is fixedly connected with the sliding seat, a fixing support in the fixing mechanism is higher than a water tank, the upper parts of a fixing column and a guide rod are higher than the water tank, the lower parts of the fixing column and the guide rod are immersed in the water tank, and the lower parts of the fixing column and the guide rod are immersed in the water tank, so that the lifting mechanism is ensured to realize the free surface crossing movement of water entering when vertically moving in the fixing mechanism; when the fixing mechanism is movably connected with the sliding seat, all parts of the structure in the fixing mechanism can move up and down on the water surface.
Compared with the prior art, the invention has the beneficial effects that:
the invention can realize the superposition combination of two motion states of horizontal motion and vertical motion through the test platform suitable for the measurement of the motion of the model across the free surface, and when the model is installed in the test platform, the simulation bionic model researches the hydro-pneumatic performance of an organism water outlet or an aircraft model through the horizontal motion and the vertical motion of the test platform in a water pool, thereby realizing the measurement of the stress condition of the motion of various models across the free surface.
Drawings
FIG. 1 is a three-view and isometric view of a test platform suitable for measurement of model motion across a free surface.
Figure 2 is a schematic view of the sliding panel sliding over the sink.
Fig. 3 is a schematic view of the mounting structure of the fixing mechanism.
FIG. 4 is a schematic view of a water discharging process of a test platform suitable for measuring the motion of a model across a free surface.
FIG. 5 is a schematic view of a test platform water inlet process suitable for measuring the motion of a model across a free surface.
Detailed Description
The drawings are only for purposes of illustration and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
The water-air cross-medium motion requires that a cross-medium aircraft can keep the optimal water-air performance under different medium environments, can cross a medium interface for multiple times and fly in the air or sail underwater for a long time, and breaks through the limitation of the traditional single-medium aircraft on the use environment. In order to better explore and solve the technical key points of the cross-medium aircraft, the invention builds a test platform suitable for measuring the cross-free-surface motion of the model, and the test model of the platform can be a bionic model so as to explore the phenomenon that the creatures go out of and enter water, and can also be an aircraft model so as to verify the hydro-pneumatic performance of the aircraft. The model is installed on the installation mechanism, the model is driven to vertically move through the lifting mechanism, the model is carried to horizontally move through the sliding seat, the vertical movement and the horizontal movement are carried out simultaneously, and the stress of the model moving across the free surface is measured by the force measuring mechanism.
Fig. 1 is a top view, a front view, a left view and an axonometric view of a test platform suitable for measuring the movement of a model across a free surface, wherein the test platform is arranged on a water pool and comprises a sliding seat, a fixing mechanism, a lifting mechanism, an installing mechanism and a force measuring mechanism,
the sliding seat is used for carrying the lifting mechanism, the fixing mechanism, the mounting mechanism and the force measuring mechanism and can horizontally slide on the water pool.
Preferably, the sliding seat includes: the sliding plate is used for carrying the lifting mechanism, the mounting mechanism and the force measuring mechanism and horizontally sliding on the water pool; and the connecting part is arranged on the sliding plate, is connected with the fixing mechanism, and is used for connecting the fixing mechanism to the sliding plate to carry the lifting mechanism, the mounting mechanism and the force measuring mechanism.
Preferably, at least one part of the sliding plate is a hollow area, and the hollow area enables the fixing mechanism, the lifting mechanism, the mounting mechanism and the force measuring mechanism to penetrate through the sliding plate to move up and down.
Specifically, the sliding seat controls the horizontal movement of the whole test platform, and one of the cases of the sliding seat is exemplified in the embodiment of the present invention, but not limited to the case in the embodiment of the present invention:
as shown in fig. 2, the schematic diagram of the sliding plate with pulleys in the sliding seat sliding on the pool with guide rails is shown, the sliding seat is a trailer platform and can move above the pool along the rails, and the sliding seat comprises the sliding plate with pulleys and a connecting part, wherein the sliding plate is of a partially hollowed rectangular structure and is used for connecting a fixing mechanism, a lifting mechanism, an installation mechanism and a force measuring mechanism, so that the model can vertically move up and down on the horizontal plane through the sliding plate; the connecting parts are two rectangular mounting and connecting structures which are higher than the edges of the hollow areas which are mounted on the sliding plate and are respectively mounted on the sliding plate, and the connecting parts are connected with the fixing mechanism, so that the fixing mechanism, the lifting mechanism, the mounting mechanism and the force measuring mechanism are mounted in the hollow areas of the sliding plate and penetrate through the sliding seat to move up and down.
The fixing mechanism is connected with the sliding seat and the lifting mechanism and is used for fixedly connecting the lifting mechanism to the sliding seat.
Preferably, the fixing mechanism includes: the fixed bracket is fixedly connected with the connecting part; the fixing column is fixedly connected with the fixing support; the upper surface of the fixing plate is fixedly connected with the lower end of the fixing column; the guide rod is installed on the upper surface of the fixing plate, is installed in parallel with the fixing column, is connected with the connecting rod and is used for enabling the lifting structure to vertically move on the guide rod.
Specifically, the embodiment of the present invention specifically recites an installation structure of a fixing mechanism:
fig. 3 shows a schematic diagram of the mounting structure of the fixing mechanism in the left part, wherein the fixing mechanism includes two fixing posts 1, two guide rods 4, a fixing plate 3 and a fixing bracket 2: the fixed bracket 2 is of a rectangular structure and is connected with the connecting part on the sliding seat 5; two fixed columns 1 are respectively connected at the inner side of the opposite side of a fixed support 2, two guide rods 4 are connected at the inner side of the same side of the fixed support 2, the two fixed columns 1 and the two guide rods 4 are parallel to each other, the lower end face of the two fixed columns is connected and fixed on the upper surface of a fixed plate 3, the fixed columns 1 serve as main support columns to ensure the stability of a test platform, the guide rods 4 serve as the guide of a lifting mechanism to ensure the movement of the lifting mechanism along the vertical direction, the fixed mechanism in the embodiment can be fixedly connected with a sliding seat 5, namely the fixed mechanism is in an immovable state, and the upper half part of the fixed mechanism is higher than a water pool and the.
The lifting mechanism is used for driving the model to vertically move, and can enable at least one part of the model to be immersed in the water tank, and one part of the model is higher than the water tank;
preferably, the lifting mechanism includes: the connecting rods are movably connected with the fixing mechanism; the lower end of the lifting driving column is fixedly connected with the connecting rod, and the upper end of the lifting driving column is connected with the connecting motor and used for driving the lifting mechanism to lift.
Specifically, as shown in the right part of fig. 3, which is a schematic view of the installation of the fixing mechanism, the lifting mechanism, the installation mechanism and the force measuring mechanism, wherein the lifting mechanism is installed inside the fixing mechanism, the connection structure for the lifting mechanism comprises: the lifting mechanism is of a rectangular structure seen from a depression angle, the rectangular structure comprises 2, 3, 1 and 3 connecting rods, two connecting rods are movably connected between two guide rods 4 in the fixing mechanism through lifting sleeve rods 13, three connecting rods are correspondingly connected in the other direction perpendicular to the guide rods, one connecting rod is connected with six connecting rods to form a closed-loop rectangular structure, and all the connecting rods are vertically installed with the guide rods; and the lifting driving column 8 is vertically connected to a connecting rod, and the upper end of the lifting driving column is connected with the linear motor to drive the lifting mechanism to do vertical motion.
The mounting mechanism is used for mounting a model and is arranged on the lifting mechanism;
preferably, the mounting mechanism comprises: and the cross-shaped mounting bracket is used for being mounted inside the test model.
Preferably, the mounting mechanism further comprises a sliding sleeve rod, and two ends of the cross-shaped mounting bracket are mounted on the connecting rod through the sliding sleeve rod.
Specifically, installation mechanism includes cross installing support 6 and slip loop bar 7, and cross installing support 6 installs inside the model for the installation fixed model, and cross installing support 6 both ends are connected on the connecting rod through slip loop bar 7 about, guarantee the freedom of model horizontal fore-and-aft motion, restraint the motion of the vertical direction and the side direction of model.
The force measuring mechanism is used for measuring the stress of the model, is arranged on the lifting mechanism and is connected with the mounting mechanism through a connecting wire, and specifically, the connecting wire is a thin steel cable;
preferably, the force measuring mechanism includes: first dynamometer and second dynamometer, first dynamometer and second dynamometer installation are fixed on the connecting rod, and both ends horizontally connect about through guy cable and cross installing support respectively.
Specifically, an upper force measurement security point 9 and a lower force measurement security point 10 are respectively arranged at the upper end and the lower end of a cross mounting support 6, the left end and the right end of the cross mounting support 6 are mounted inside a lifting mechanism through sliding sleeve rods 7, the force measurement mechanism comprises a first dynamometer 11 and a second dynamometer 12, the first dynamometer 11 and the second dynamometer 12 are respectively mounted on two connecting rods between guide rods and respectively correspond to the upper force measurement security point 9 and the lower force measurement security point 10 at the upper end and the lower end of the cross mounting support 6, the first dynamometer 11 and the second dynamometer 12 are respectively connected with the upper force measurement security point 9 and the lower force measurement security point 10 of the cross mounting support 6 through thin steel cables, the rolling stress of the model when the model is impacted by incoming flow can be measured, and the motion stress condition of the model can be analyzed.
Example 2
As shown in fig. 4, in the water discharging process, in an initial state, the upper half part of the fixing mechanism is higher than the water tank, the lower half part of the fixing mechanism is immersed in the water tank, the lifting mechanism, the mounting mechanism provided with the model and the force measuring mechanism are immersed in the water tank, when the sliding seat starts to move towards the right, the lifting mechanism starts to move upwards to drive the mounting mechanism and the force measuring mechanism to move upwards, and the model also moves upwards, so that the motion stress of the model water can be calculated through the first force measuring machine and the second force measuring machine, the motion of the model can be synthesized into the motion water which is obliquely upwards, and the inclined angle is determined by the ratio of the speed of the sliding seat and the ascending speed of the lifting mechanism.
As shown in fig. 5, a schematic diagram of a water inlet process of a test platform suitable for measuring the motion of a model across a free surface is shown, in the water inlet process, when the fixed structure is in an initial state, the upper half part of the fixed structure is higher than a water tank, the lower half part of the fixed structure is immersed in the water tank, a lifting mechanism, a drilling mechanism provided with the model and a force measuring mechanism are all higher than a horizontal plane, when a sliding seat starts to move towards the right, the lifting mechanism starts to move downwards, a mounting mechanism and the force measuring mechanism are driven to move downwards, and the model moves downwards, so that the motion stress of the model water outlet can be calculated through a first force measuring machine and a second force measuring machine, the motion of the model can be combined into the motion water inlet in an oblique and downward direction, and the inclined angle is determined by the ratio of the speed of.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.
Claims (10)
1. A test platform suitable for measuring the motion of a model across a free surface is characterized by being arranged on a water pool and comprising a sliding seat, a lifting mechanism, an installation mechanism and a force measuring mechanism,
the sliding seat is used for carrying the lifting mechanism, the mounting mechanism and the force measuring mechanism and can horizontally slide on the water pool;
the lifting mechanism is used for driving the model to vertically move, and can enable at least one part of the model to be immersed in the water tank, and one part of the model is higher than the water tank;
the mounting mechanism is used for mounting a model and is arranged on the lifting mechanism;
the force measuring mechanism is used for measuring the stress of the model, is arranged on the lifting mechanism and is connected with the mounting mechanism through a connecting wire;
the model is installed on the installation mechanism, the model is driven to vertically move through the lifting mechanism, the model is carried to horizontally move through the sliding seat, the vertical movement and the horizontal movement are carried out simultaneously, and the stress of the model moving across the free surface is measured by the force measuring mechanism.
2. The test platform for measurement of model cross-free surface motion according to claim 1, further comprising a fixing mechanism connecting the sliding seat and the lifting mechanism for fixedly connecting the lifting mechanism to the sliding seat.
3. A test platform suitable for measurement of model cross-free surface motion according to claim 2, wherein the sliding seat comprises:
a sliding plate for sliding horizontally on the pool;
and the connecting part is arranged on the sliding plate, is connected with the fixing mechanism and is used for carrying the fixing mechanism, the lifting mechanism, the mounting mechanism and the force measuring mechanism.
4. The test platform suitable for measurement of model cross-free surface motion as claimed in claim 3, wherein at least a portion of the sliding plate is a hollowed area, and the hollowed area enables the fixing mechanism, the lifting mechanism, the mounting mechanism and the force measuring mechanism to move up and down through the sliding plate.
5. The test platform suitable for measurement of model cross-free surface motion according to claim 2, wherein the lifting mechanism comprises:
the connecting rods are movably connected with the fixing mechanism;
the lower end face of the lifting driving column is fixedly connected with the connecting rod, and the upper end of the lifting driving column is connected with the motor and used for driving the lifting mechanism to lift.
6. A test platform suitable for measurement of model movement across a free surface as claimed in claim 5, wherein said mounting mechanism comprises: and the cross-shaped mounting bracket is used for mounting inside the model.
7. The test platform suitable for measuring the movement of the model across the free surface as claimed in claim 6, wherein the mounting mechanism further comprises a sliding sleeve rod, and the left end and the right end of the cross-shaped mounting bracket are mounted on the connecting rod through the sliding sleeve rod.
8. A test platform suitable for measurement of model motion across a free surface according to claim 6, wherein the force measuring mechanism comprises: first dynamometer and second dynamometer, first dynamometer and second dynamometer are installed on the connecting rod, and pass through the upper and lower both ends horizontally connect of connecting wire and cross installing support respectively.
9. A test platform suitable for measurement of model cross-free surface motion according to claim 2, wherein the fixing mechanism comprises:
the fixed bracket is fixedly connected with the connecting part and is used for connecting the fixed mechanism with the sliding seat;
the upper end of the fixing column is fixedly connected with the fixing support, and the lower end face of the fixing column is fixedly connected with the upper surface of the fixing plate;
and the fixing plate is arranged in parallel with the horizontal plane.
10. The test platform for measurement of model cross-free surface motion according to claim 9, wherein the fixing mechanism further comprises:
and the lower end face of the guide rod is fixedly connected with the upper surface of the fixed plate, is parallel to the fixed column, is movably connected with the lifting mechanism and is used for the vertical movement of the lifting structure on the guide rod.
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