CN112706944B - Wave water surface model water-landing test device and method - Google Patents
Wave water surface model water-landing test device and method Download PDFInfo
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- CN112706944B CN112706944B CN202011451223.1A CN202011451223A CN112706944B CN 112706944 B CN112706944 B CN 112706944B CN 202011451223 A CN202011451223 A CN 202011451223A CN 112706944 B CN112706944 B CN 112706944B
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- 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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Abstract
The application provides a wave surface of water model test device and method of catching water, the device includes motion control mechanism (1), vertical motion system (2), puts in trigger mechanism (3), heaving pole (4), airworthiness appearance (5), vertical displacement sensor (6), ejector pin (7), six component balance (8), wave height appearance (9), testpieces (10), direct current circuit (11), trailer (13), coaster (14), acceleration sensor (15), pressure sensor (16), wherein: a motion control mechanism (1), a vertical motion system (2) and a trigger mechanism (3) are arranged in the trailer (13), and a seaworthiness instrument (5) is arranged at the lower end of the trailer (13); a pulley (14) is arranged in the middle of the airworthiness instrument (5); the front end part of the airworthiness instrument (5) is provided with a wave height instrument (9); the vertical motion system (2) is connected with the motion control mechanism (1), and the vertical motion system (2) is controlled by the motion control mechanism (1).
Description
Technical Field
The invention relates to the field of dampening test, in particular to a dampening test device and method for a wave water surface model.
Background
At present, for the water surface aircraft and land-based aircraft wave water surface towing tank model water landing tests, a mode that a trailer drives a model to move and the model is released at a proper position is basically adopted, the model and the water surface move simultaneously, the encountering position of waves and the model cannot be obtained and controlled, and only multiple repeated tests can be adopted for obtaining the maximum water landing load, and then the statistical mode is utilized for analysis; meanwhile, the test method does not have the function of accurately judging the water landing time, and the sinking speed confidence level of the water landing time is low.
Disclosure of Invention
The application provides a wave water surface model water landing test device and method, which are used for monitoring and controlling the encountering positions of the model and waves, so that the test times are reduced, and the test cost is reduced; the method has the advantages that the water landing time of the model is accurately recorded, the sinking speed of the model at the water landing time is accurately measured, accurate input is provided for the water landing load test of the wave water surface, and the water landing impact torque test is realized.
In a first aspect, the application provides a wave surface of water model test device that wets, the device includes motion control mechanism (1), vertical motion system (2), puts in trigger mechanism (3), heaving pole (4), airworthiness appearance (5), vertical displacement sensor (6), ejector pin (7), six component balance (8), wave height appearance (9), testpieces (10), direct current circuit (11), trailer (13), coaster (14), acceleration sensor (15), pressure sensor (16), wherein:
a motion control mechanism (1), a vertical motion system (2) and a trigger mechanism (3) are arranged in the trailer (13), and a seaworthiness instrument (5) is arranged at the lower end of the trailer (13); a pulley (14) is arranged in the middle of the airworthiness instrument (5); the front end part of the airworthiness instrument (5) is provided with a wave height instrument (9); the vertical motion system (2) is connected with the motion control mechanism (1), and the vertical motion system (2) is controlled by the motion control mechanism (1); the lower end of the vertical motion system (2) is fixedly connected with the throwing trigger mechanism (3); the lower end of the throwing trigger mechanism (3) is connected with the heave rod (4); the lower end of the heave rod (4) is connected with the test piece (10), and the heave rod (4) can move up and down in the vertical direction; the heave rod (4) is connected with the airworthiness instrument (5) through a pulley system (14); the lower end of the pulley system (14) is provided with a vertical displacement sensor (6) and a six-component balance (8), and the six-component balance (8) is arranged on a test piece (10) through a mandril (7); a direct current circuit (11), an acceleration sensor (15) and a pressure sensor (16) are arranged in the test piece (10).
Preferably, the six-component balance (8) is used for measuring the pitching moment of the test piece (10) in the process of water.
Preferably, an acceleration sensor (15) for measuring the acceleration of the test piece (10) during the water-dropping process;
using a pressure sensor (16) for measuring the pressure of the test piece (10) during the water application process;
and a vertical displacement sensor (6) is used for measuring the vertical displacement of the test piece (10) in the process of water absorption.
Preferably, the direct current circuit (11) is used for sending a contact signal to the motion control mechanism (1) when contacting the water surface.
In a second aspect, the present application provides a wave water surface model damping test method, which is applied to the wave water surface model damping test apparatus described above, and the method includes:
the wave height instrument (9) measures the wave height y of the position of the wave height instrument in real time0；
According to the waveHigh y0Calculating the horizontal coordinate x of the wave height meter (9) position0；
According to the formula xi＝x0+ d, combining the wave height instrument (9) and the horizontal distance d of the lowest point of the test piece (10), and calculating the horizontal coordinate x of the water landing point of the test piece (10)i；
According to the formula y (x) acos (kx), the vertical coordinate y of the water point of the test piece (10) is calculatediIn the formula, y-vertical wave surface coordinate, x-horizontal wave surface coordinate, A-is wave amplitude, and k-is wave parameter.
Preferably, the method further comprises:
by measuring the wave height y at different times0And (3) putting the test piece (10) downwards, and controlling the encountering position of the test piece (10) and the wave surface (12).
Preferably, the method further comprises:
measuring the pitching moment of the test piece (10) in the process of catching water by using a six-component balance (8);
measuring the acceleration of the test piece (10) in the process of water absorption by using an acceleration sensor (15);
measuring the pressure of the test piece (10) in the process of water application by using a pressure sensor (16);
and measuring the vertical displacement of the test piece (10) in the process of catching water by using a vertical displacement sensor (6).
Preferably, the method further comprises:
differentiating the vertical displacement measured by the vertical displacement sensor (6);
and determining the vertical speed of the test piece (10) at the time of water catching by combining the triggering time recorded by the data acquisition system.
In conclusion, the invention has the advantages that:
1) can realize the control of the model and the wave meeting point
The water landing time is determined according to a feedback signal of the direct current circuit 11, the water landing position can be accurately measured through the real-time wave height measured by the wave height instrument 9 and the geometric relation between the lowest point of the test piece 10 and the wave height instrument, and then the encountering position of the test piece 10 and the wave water surface 12 is controlled by throwing the test piece 10 under different real-time wave height values.
2) Can realize accurate measurement and control of the water speed
The vertical motion system 2 transmits motion to the test piece 10, the vertical speed is calibrated by combining the vertical displacement data measured by the vertical displacement sensor 6 and the feedback signal of the direct current circuit 11, and the control program of the vertical motion system 2 is adjusted to accurately control the vertical speed of the test piece 10.
3) Can realize accurate judgment of the water-landing time of the model
The direct current circuit 11 is used for contacting water to form a circuit closed loop, and the signal is fed back to the data acquisition system, so that the water facing time can be accurately recorded.
4) The method is easy to realize and simple to operate.
Drawings
Fig. 1 is a schematic diagram of a wave water surface model water landing test method provided in the present application;
fig. 2 is a schematic structural diagram of a wave water surface model damping test device provided by the present application;
the device comprises a motion control mechanism 1, a vertical motion system 2, a throwing trigger mechanism 3, a heave rod 4, an airworthiness instrument 5, a vertical displacement sensor 6, a mandril 7, a six-component balance 8, a wave height instrument 9, a test piece 10, a direct current circuit 11, a wave water surface 12, a trailer 13, a pulley 14, an acceleration sensor 15 and a pressure sensor 16.
Detailed Description
The invention belongs to a method for carrying out a water landing test, which can be used for model water landing tests of amphibious airplanes, ground effect wing airplanes, cross-medium aircrafts, land-based airplanes forced landing on water and the like, and relates to a model and wave water landing point monitoring and controlling technology, a water landing time monitoring technology, a sinking speed measuring technology, posture adjustment and the like. The test method is successfully applied to the wave water surface water-landing test of the amphibious aircraft model, and the load and motion tests under different encountering positions, different postures, different speeds and different weights are realized.
As shown in fig. 2, the device for testing the water landing of the wave water surface model provided by the application is composed of a motion control mechanism 1, a vertical motion system 2, a throwing trigger mechanism 3, a heave rod 4, a seaworthiness instrument 5, a vertical displacement sensor 6, a top rod 7, a six-component balance 8, a wave height instrument 9, a test piece 10, a direct current circuit 11, a wave water surface 12, a trailer 13, a pulley 14, an acceleration sensor 15 and a pressure sensor 16.
The invention realizes that the model enters water at an accurate angle and speed by the technologies of encountered position control, attitude adjustment, model water-landing time recording and the like of waves and the model, and can realize measurement of pitching moment besides conventional water load.
The implementation mode is as follows:
the test piece 10 is fixedly connected with the heave rod 4, the heave rod 4 is connected with the throwing trigger mechanism 3, the throwing trigger mechanism 3 is fixedly connected with the vertical motion system 2, the vertical motion system 2 is controlled by the motion control mechanism 1, the heave rod 4 is connected with the seaworthiness instrument 5 through the pulley system 14, the motion control mechanism 1, the vertical motion system 2 and the seaworthiness instrument 5 are installed on the trailer 13, and the pulley 14 is installed on the seaworthiness instrument 5 and plays a navigation role for the heave rod 4.
In the test process, the adjustment of different attitude angles is realized through the mandril 7, and the horizontal speed of the test piece 10 is given through the trailer 14; when the trailer 14 runs to a proper position, the vertical motion system 2 starts to work, and the vertical motion speed of the test piece 10 is given; when the lowest point of the model touches water, the direct current circuit 11 arranged at the lowest point is communicated and feeds back a signal to the motion control mechanism 1, the motion control mechanism 1 triggers the throwing trigger mechanism 3 to separate the test piece 10 from the throwing trigger mechanism 3, and the data acquisition system records the moment; the measured value of the vertical displacement sensor 6 is differentiated, the vertical speed of the test piece 10 at the time of water landing can be determined by combining the triggering time recorded by the data acquisition system, and the accurate control of the vertical speed is further realized by adjusting the control program of the vertical movement system 2.
As shown in fig. 1, a position control flow is encountered: the wave height instrument 9 measures the wave height at the corresponding position in real time, the horizontal distance between the wave height instrument and the lowest point of the test piece is d, the wave surface equation can be simplified into sine or cosine wave at a specific moment, and as indicated by equation (1), the wave height y measured in real time according to the wave height instrument 90The horizontal coordinate x of the position can be obtained0So that the horizontal coordinate of the water landing is xi＝x0+ d, brought to wave surface sideThe vertical coordinate y of the water-catching point can be obtained in the processiBy measuring the wave height y at different values0The test piece 10 is placed downwards, and the position of the test piece 10 meeting the wave surface 12 can be controlled.
y(x)＝Acos(kx) (1)
In the formula: y-vertical wave surface coordinates; x-wave horizontal coordinates; a-is the amplitude, known quantity given the wave conditions; k-is a wave parameter, a known quantity given the wave conditions.
In the test process: the pitching moment, the acceleration, the pressure, the vertical displacement and the like of the test piece 10 in the water landing process are respectively measured by using the six-component balance 8, the acceleration sensor 15, the pressure sensor 16 and the vertical displacement sensor 6.
Claims (7)
1. The utility model provides a wave surface of water model test device that wets, its characterized in that, the device includes motion control mechanism (1), vertical motion system (2), puts in trigger mechanism (3), heaving pole (4), airworthiness appearance (5), vertical displacement sensor (6), ejector pin (7), six component balance (8), wave height appearance (9), testpieces (10), direct current circuit (11), trailer (13), coaster (14), acceleration sensor (15), pressure sensor (16), wherein:
a motion control mechanism (1), a vertical motion system (2) and a throwing trigger mechanism (3) are arranged in the trailer (13), and a seaworthiness instrument (5) is arranged at the lower end of the trailer (13); a pulley (14) is arranged in the middle of the airworthiness instrument (5); the front end part of the airworthiness instrument (5) is provided with a wave height instrument (9); the vertical motion system (2) is connected with the motion control mechanism (1), and the vertical motion system (2) is controlled by the motion control mechanism (1); the lower end of the vertical motion system (2) is fixedly connected with the throwing trigger mechanism (3); the lower end of the throwing trigger mechanism (3) is connected with the heave rod (4); the lower end of the heave rod (4) is connected with the test piece (10), and the heave rod (4) can move up and down in the vertical direction; the heave rod (4) is connected with the airworthiness instrument (5) through a pulley (14); the lower end of the pulley (14) is provided with a vertical displacement sensor (6) and a six-component balance (8), and the six-component balance (8) is arranged on a test piece (10) through a mandril (7); a direct current circuit (11), an acceleration sensor (15) and a pressure sensor (16) are arranged in the test piece (10); the direct current circuit (11) is used for sending a contact signal to the motion control mechanism (1) when contacting the water surface.
2. The device according to claim 1, characterized by a six-component balance (8) for measuring the pitching moment of the test piece (10) during water.
3. The apparatus of claim 1,
an acceleration sensor (15) for measuring the acceleration of the test piece (10) during the water-dropping process;
a pressure sensor (16) for measuring the pressure of the test piece (10) during the water-application process;
and the vertical displacement sensor (6) is used for measuring the vertical displacement of the test piece (10) in the process of water absorption.
4. The method for testing the water landing of the wave water surface model is applied to the device for testing the water landing of the wave water surface model in claim 1, and comprises the following steps:
the wave height instrument (9) measures the wave height y of the position of the wave height instrument in real time0；
According to said wave height y0Calculating the horizontal coordinate x of the position of the wave height instrument (9)0；
According to the formula xi＝x0+ d, combining the wave height instrument (9) and the horizontal distance d of the lowest point of the test piece (10), and calculating the horizontal coordinate x of the water landing point of the test piece (10)i；
According to the formula y (x) acos (kx), the vertical coordinate y of the water point of the test piece (10) is calculatediIn the formula, y-vertical wave surface coordinate, x-horizontal wave surface coordinate, A-is wave amplitude, and k-is wave parameter.
5. The method of claim 4, further comprising:
by measuring the wave height y at different times0And (3) putting the test piece (10) downwards, and controlling the encountering position of the test piece (10) and the wave surface (12).
6. The method of claim 4, further comprising:
measuring the pitching moment of the test piece (10) in the process of catching water by using a six-component balance (8);
measuring the acceleration of the test piece (10) in the process of water absorption by using an acceleration sensor (15);
measuring the pressure of the test piece (10) in the process of water application by using a pressure sensor (16);
and measuring the vertical displacement of the test piece (10) in the process of catching water by using a vertical displacement sensor (6).
7. The method of claim 6, further comprising:
differentiating the vertical displacement measured by the vertical displacement sensor (6);
and determining the vertical speed of the test piece (10) at the time of water landing by combining the triggering time recorded by the data acquisition system.
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| CN114139282B (en) * | 2021-12-02 | 2024-03-29 | 中国空气动力研究与发展中心空天技术研究所 | Water inlet impact load modeling method for cross-medium aircraft |
| CN114323559B (en) * | 2021-12-30 | 2023-12-22 | 中国特种飞行器研究所 | Aircraft water model space motion trail and water point capturing system |
| CN114993613B (en) * | 2022-05-27 | 2023-01-24 | 上海交通大学 | Test method and test system for structure water entering test |
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| KR100343021B1 (en) * | 1998-05-30 | 2002-09-18 | 삼성중공업 주식회사 | 6 degree of freedom movement measuring device |
| CN106644377A (en) * | 2016-11-03 | 2017-05-10 | 中国特种飞行器研究所 | Basin test device and method for wave-resistant capability full-aircraft power-free model of water surface aircraft |
| CN107941459B (en) * | 2017-12-13 | 2019-08-20 | 中国特种飞行器研究所 | A kind of water surface flying device hits wave load basin test system and method |
| CN109612684A (en) * | 2018-12-14 | 2019-04-12 | 中国特种飞行器研究所 | Water surface flying device model dampening load test device and method under fixed pose |
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