CN111521062B - Test method for simulating influence of cannonball launching recoil on stability of patrol boat - Google Patents
Test method for simulating influence of cannonball launching recoil on stability of patrol boat Download PDFInfo
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- CN111521062B CN111521062B CN202010357595.1A CN202010357595A CN111521062B CN 111521062 B CN111521062 B CN 111521062B CN 202010357595 A CN202010357595 A CN 202010357595A CN 111521062 B CN111521062 B CN 111521062B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
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Abstract
The invention relates to a test method for simulating the influence of the recoil force of shell launching on the stability of a patrol boat, belonging to the field of patrol boat tests. In order to solve the problem that the transverse stability of the patrol boat stays in a zero-speed still water stage, the model weight, the towing speed, the magnitude of the simulated recoil force and the acting time are converted according to the Froude similarity before a test, the configuration of the patrol boat model (2) is ensured to be similar to that of a real boat, the test speed of the model is controlled by a high-speed hydrodynamic test trailer system in the test, the instantaneous simulated recoil force is transversely applied to the patrol boat model (2) through an electromagnetic emission control system after the model slides at a stable speed, the model resistance, the pitch angle, the roll angle and the gravity center heave are collected through a test data collection system, and the real boat resistance, the pitch angle, the roll angle and the gravity center heave are converted so as to forecast the motion stability of the real boat which is disturbed by external force in the sailing process. Therefore, the motion stability of the real patrol boat ship, which is influenced by the recoil force of the projectile is accurately forecasted.
Description
Technical Field
The invention belongs to the field of patrol boat tests, and particularly relates to a test method for simulating the influence of recoil force generated by projectile launching on the stability of a patrol boat.
Background
The ship stability is a performance which needs to be researched for each ship model, and for a patrol boat, when a large-caliber shell is launched in a battle, the generated recoil inevitably applies a tilting moment to the patrol boat, so that the balance state of the ship is damaged. In a high-speed sliding state, the coupling effect of rolling and other freedom degree motions can increase the possibility of overturning of the patrol boat, and particularly after the gun and gun system continuously shoots, the nonlinear rolling of the ship can cause great threat to the safety of personnel and the safety of the ship. In the design stage of the ship, the stationarity of the ship body generally needs to be researched, and the analysis method is complex and difficult to realize for the stability of the ship body subjected to the instantaneous impact force in the motion state.
At present, the transverse stability of the patrol boat mainly stays in a zero-speed still water stage, and a practical stability test method for applying instantaneous external force to the patrol boat in motion does not exist. Therefore, research on a simulation test method for the instantaneous impact of the sliding patrol boat by external force needs to be carried out, data related to the stability of the patrol boat under the influence of the recoil force of the projectile is accurately tested, the motion stability of the real ship of the patrol boat under the influence of the recoil force of the projectile is accurately forecasted, and the design of the real ship line and the gun system of the patrol boat is well verified.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problem of how to provide a test method for simulating the influence of the recoil force of shell launching on the stability of a patrol boat, so as to solve the technical problem that the transverse stability of the prior patrol boat mainly stays in a zero-speed hydrostatic stage.
(II) technical scheme
In order to solve the technical problem, the invention provides a test method for simulating the influence of the recoil force of projectile launching on the stability of a patrol boat, which comprises the following steps:
a) installation of a patrol boat stability test model:
fixedly installing an electromagnetic target plate (1) on a patrol boat model (2), and installing the patrol boat model (2) on an airworthiness instrument (4) below a high-speed hydrodynamic test trailer system (3) to keep fixed; a front navigation piece (5) and a rear navigation piece (6) are respectively arranged on the bow and the stern of the patrol boat model (2), a front navigation rod (7) on the airworthiness instrument (4) is inserted into the front navigation piece (5), a rear navigation rod (8) is inserted into the rear navigation piece (6), and yawing can be avoided in the test process of the patrol boat model (2); a towing wheel rod (9) is installed at the front end of the airworthiness instrument (4), a towing wheel (10) is installed at the bottom of the towing wheel rod (9), a single-component force measuring sensor (11) is connected with a towing point (12) of the patrol boat model (2) through a steel wire rope towing line (13), and the towing line (13) is ensured to be positioned in a longitudinal section of the patrol boat model (2), so that the high-speed hydrodynamic test towing system (3) tows the patrol boat model (2) to move forwards in a test; after the patrol boat model (2) is submerged, adjusting and recording the fore-aft draught at two sides of the patrol boat model (2) to ensure that the reading of the patrol boat model is consistent with the theoretical value under the test state; the electromagnetic launching control system (19) is arranged in the high-speed hydrodynamic test trailer system (3), the electromagnetic block (20) is arranged at the bottom of the electromagnetic launching support frame (21), the electromagnetic launching control system (19) controls acting force and acting time between the electromagnetic block (20) and the electromagnetic target plate (1), and after the electromagnetic launching control system is electrified, the electromagnetic target plate (1) is subjected to instantaneous transverse magnetic force to simulate recoil force generated after the patrol boat model (2) launches a cannonball;
b) installing test equipment:
the equipment related to the patrol boat model (2) test comprises a video recorder (14), a video recording control system (15), a single-component force measuring sensor (11), a test data acquisition system (16), an inclination angle sensor (17), a stay wire type displacement sensor (18) and an electromagnetic emission control system (19); the video recorder (14) is installed in front of the patrol boat model (2), and the video recording control system (15) is installed in the high-speed hydrodynamic test trailer system (3) and used for controlling the video recorder (14) to be opened and closed and to be started and stopped; mounting the video recorder (14) below the high speed hydrodynamic test trailer system (3) using a video recorder mounting bracket (22) and ensuring that the video recorder (14) does not vibrate significantly during the test; the test data acquisition system (16) and the stay wire type displacement sensor (18) are installed in the high-speed hydrodynamic test trailer system (3), the tilt angle sensor (17) is installed at the bow position of the patrol boat model (2), and the test data acquisition system (16) is connected with the single-component force measuring sensor (11), the tilt angle sensor (17) and the stay wire type displacement sensor (18) through data transmission cables; the electromagnetic target plate (1) and the electromagnetic block (20) are connected with the electromagnetic emission control system (19) in the high-speed hydrodynamic test trailer system (3) through a special cable;
c) the experiment of simulating the impact of the recoil force of shell launching on the stability of the patrol boat:
before the test, recording the weight, the water temperature and the humidity of the patrol boat model (2); putting the patrol boat model (2) into a pool dock, and adjusting and recording the fore-aft draught at two sides of the patrol boat model (2); starting the test data acquisition system (16), and setting initial values measured by the single-component force measuring sensor (11), the inclination angle sensor (17) and the stay wire type displacement sensor (18) to be zero by using the test data acquisition system (16) under the condition of stable water surface after the state debugging of the patrol boat model (2) is completed;
during testing, the test data acquisition system (16) starts to acquire the model resistance of the patrol boat model (2) measured by the single-component force measuring sensor (11), the model pitch and roll angles of the patrol boat model (2) measured by the tilt sensor (17) and the linear displacement data measured by the stay wire type displacement sensor (18) in real time, and the video recorder (14) is started through the video recording control system (15); then the high-speed hydrodynamic test trailer system (3) starts to operate to drive the patrol boat model (2) to move forwards in an accelerated manner on the water surface, and when the trailer accelerates to reach the running speed required by the test, the constant speed is kept, and the speed of the trailer is recorded; when the patrol boat model (2) starts to stably slide, the electromagnetic emission control system (19) is started, and based on specified parameters, the electromagnetic target plate (1) is subjected to theoretical repulsive magnetic force and action time exerted by the electromagnetic block (20) to simulate the instantaneous recoil force of the patrol boat model (2) in sliding after shells are emitted; when the electromagnetic launching control system (19) finishes launching impact, the patrol boat model (2) can generate certain-angle transverse inclination, and the high-speed hydrodynamic test trailer system (3) continues to operate at a constant speed until the transverse inclination of the patrol boat model (2) is basically finished; after each test is finished, recording the position of a time axis corresponding to the video in each video recorder; after the whole test is finished, analyzing the model resistance, the pitch angle, the roll angle and the gravity center heave of the patrol boat model (2) during sliding according to the data recorded by the test data acquisition system (16) and measured by the single-component force cell sensor (11), the roll angle sensor (17) and the stay wire type displacement sensor (18), analyzing the time history curves of the model pitch angle and the roll angle of the patrol boat model (2), and forecasting the motion stability of the actual boat disturbed by external force in the sailing process.
Further, the cannonball launching recoil simulating device of the patrol boat stability test model comprises the electromagnetic launching control system (19), the electromagnetic launching support frame (21) and the electromagnetic block (20), wherein the electromagnetic launching control system (19) is installed on the high-speed hydrodynamic test trailer system (3), the electromagnetic launching support frame (21) is fixedly connected with the aeronautical instrument (4) and the high-speed hydrodynamic test trailer system (3) respectively, and the electromagnetic block (20) is installed at the bottom of the electromagnetic launching support frame (21).
Furthermore, the cannonball launching recoil simulating device and the patrol boat model (2) are installed in a separated mode.
Further, the step c) of analyzing the model resistance, the pitch angle, the roll angle and the gravity center heave of the patrol boat model (2) during taxiing, and analyzing the time history curves of the pitch angle and the roll angle of the patrol boat model (2), so as to forecast the motion stability of the real ship disturbed by external force during the sailing process specifically comprises the following steps:
analyzing to obtain the model resistance, the pitch angle, the roll angle and the gravity center heave of the patrol boat model (2) during sliding; and then analyzing the collected resistance, the pitch angle, the roll angle and the gravity center heave effectiveness of the patrol boat model (2) by a data analysis processor, eliminating failure data, finally determining the model resistance, the pitch angle, the roll angle and the gravity center heave of the patrol boat model (2) in a series of test states, analyzing the model pitch angle and the roll angle time history curve of the patrol boat model (2), and forecasting the motion stability of the actual boat disturbed by external force in the sailing process.
Further, after the failure data are removed, the following steps are further included before model resistance, a pitch angle, a roll angle and gravity center heave of the patrol boat model (2) under a series of test states are finally determined: and comparing and analyzing the model resistance, the pitch angle, the roll angle and the gravity center heave of the patrol boat model (2) with expected results, and preliminarily judging the validity and the reliability of the results.
Further, before the test, according to the actual ship weight of the patrol boat, the water skiing speed of the actual ship, the recoil force of the actual cannonball and the acting time, the model weight, the towing speed and the simulated recoil force and the acting time are converted according to the Froude similarity, and the configuration of the patrol boat model (2) is ensured to be similar to that of the actual ship; in the test, the test speed of the patrol boat model (2) is controlled by the high-speed hydrodynamic test trailer system (3), instantaneous simulated recoil force is transversely applied to the patrol boat model (2) through the electromagnetic emission control system after the patrol boat model (2) slides at a stable speed, model resistance, a pitch angle, a roll angle and gravity center heave of the patrol boat model (2) are collected through the test data collection system (6), and real ship resistance, the pitch angle, the roll angle and the gravity center heave are converted through the instantaneous simulated recoil force, so that the motion stability of the real ship disturbed by external force in the sailing process is forecasted.
(III) advantageous effects
The invention provides a test method for simulating the influence of the recoil force of shell launching on the stability of a patrol boat, which is characterized in that before a test, the model weight, the towing speed, the magnitude of the simulated recoil force and the acting time are converted according to the Froude similarity according to the actual ship weight, the actual ship water-skiing speed, the recoil force magnitude and the acting time of the actual shell, and the configuration of a patrol boat model (2) is ensured to be similar to that of the actual ship. In the test, the test speed of the patrol boat model (2) is controlled by a high-speed hydrodynamic test trailer system, instantaneous simulated recoil force is transversely applied to the patrol boat model (2) through an electromagnetic emission control system after the model slides at a stable speed, model resistance, a pitch angle, a roll angle and gravity center heave of the patrol boat model (2) are collected through a test data collection system, and the real ship resistance, the pitch angle, the roll angle and the gravity center heave are converted through the instantaneous simulated recoil force, so that the motion stability of the real ship disturbed by external force in the sailing process is forecasted.
According to the method, through developing a research on a test method for simulating the influence of the recoil force of the projectile on the stability of the patrol boat, data related to the stability of the patrol boat under the influence of the recoil force of the projectile are accurately tested, the motion stability of the real ship of the patrol boat under the influence of the recoil force of the projectile is accurately forecasted, and the model selection design of the real ship line and the gun system of the patrol boat is better verified. The method is practical and feasible, is simple to operate, has reliable test results and has wide application range. The method is practical and feasible, is simple to operate, has reliable test results and has wide application range.
Drawings
FIG. 1 is a schematic diagram of a projectile firing recoil simulator of a patrol boat roll stability test model in accordance with the present invention;
FIG. 2 is a schematic diagram of a test system for simulating the effect of recoil from projectile firing on the roll stability of a patrol boat in accordance with the present invention.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
As shown in figures 1 and 2, the test method for simulating the influence of the recoil force of projectile firing on the stability of the patrol boat comprises the following steps:
a) installation of a patrol boat stability test model:
the method comprises the following steps of (1) installing and fixing an electromagnetic target plate 1 on a patrol boat model 2, installing the patrol boat model 2 on an airworthiness instrument 4 below a high-speed hydrodynamic test trailer system 3, and keeping the patrol boat model fixed; a front navigation piece 5 and a rear navigation piece 6 are respectively arranged on the bow and the stern of the patrol boat model, a front navigation rod 7 on the airworthiness instrument 4 is inserted into the front navigation piece 5, a rear navigation rod 8 is inserted into the rear navigation piece 6, and yawing can be avoided in the test process of the patrol boat model 2; the towing wheel rod 9 is installed at the front end of the seaworthiness instrument 4, the towing wheel 10 is installed at the bottom of the towing wheel rod 9, the single-component force transducer 11 is connected with a towing point 12 of the patrol boat model 2 through a steel wire rope towing line 13, the towing line 13 is ensured to be positioned in a longitudinal section of the patrol boat model 2, and the high-speed hydrodynamic test towing system 3 tows the patrol boat model 2 to move forwards in the test; after the patrol boat model 2 is submerged, adjusting and recording the fore-aft draught at two sides of the patrol boat model 2, and ensuring that the reading of the patrol boat model is consistent with the theoretical value under the test state; the electromagnetic emission control system 19 is arranged in the high-speed hydrodynamic test trailer system 3, the electromagnetic block 20 is arranged at the bottom of the electromagnetic emission support frame 21, the electromagnetic emission control system 19 controls acting force and acting time between the electromagnetic block 20 and the electromagnetic target plate 1, and after the electromagnetic emission control system is electrified, the electromagnetic target plate 1 is subjected to instantaneous transverse repulsive force based on set designated parameters so as to simulate recoil force generated after the patrol boat model 2 emits shells.
b) Installing test equipment:
the equipment related to the test of the patrol boat model 2 comprises a video recorder 14, a video recording control system 15, a single-component force measuring sensor 11, a test data acquisition system 16, a tilt angle sensor 17, a stay wire type displacement sensor 18 and an electromagnetic emission control system 19. The video recorder 14 is installed in front of the patrol boat model 2, so that the movement situation of the patrol boat model 2 in the test process can be visually observed from the video recorder 14, once the patrol boat model 2 has an abnormal movement situation, a tester can determine whether the test needs to be stopped through a video picture to ensure safety, and the video control system 15 is installed in the high-speed hydrodynamic test trailer system 3 and used for controlling the opening and closing, starting and stopping of the video recorder 14; the video recorder 14 is installed below the high-speed hydrodynamic test trailer system 3 by using the video recorder installation bracket 22, and the video recorder 14 is ensured not to vibrate obviously in the test process; the test data acquisition system 16 and the stay wire type displacement sensor 18 are arranged in the high-speed hydrodynamic test trailer system 3, the inclination angle sensor 17 is arranged at the bow position of the patrol boat model 2, and the test data acquisition system 16 is connected with the single component force measuring sensor 11, the inclination angle sensor 17 and the stay wire type displacement sensor 18 through data transmission cables; the electromagnetic target plate 1 and the electromagnetic block 20 are connected with an electromagnetic emission control system 19 in the high-speed hydrodynamic test trailer system 3 through special cables.
c) The experiment of simulating the impact of the recoil force of shell launching on the stability of the patrol boat:
before the test, recording parameters such as the weight, the water temperature, the humidity and the like of the patrol boat model 2; putting the patrol boat model 2 into a pool dock, adjusting and recording the fore-aft draught at two sides of the patrol boat model 2; and starting the test data acquisition system 16, and setting initial values measured by the single component force measuring sensor 11, the inclination angle sensor 17 and the stay wire type displacement sensor 18 to be zero by using the test data acquisition system 16 under the condition of stable water surface after the state debugging of the patrol boat model 2 is completed.
During testing, the test data acquisition system 16 starts to acquire the model resistance of the patrol boat model 2 measured by the single-component force-measuring sensor 11, the model pitch and roll angles of the patrol boat model 2 measured by the tilt sensor 17 and the linear displacement data measured by the stay wire type displacement sensor 18 in real time, and the video recorder 14 is started through the video control system 15; then the high-speed hydrodynamic test trailer system 3 starts to operate to drive the patrol boat model 2 to move forwards on the water surface in an accelerated manner, and when the trailer accelerates to reach the operation speed required by the test, the constant speed is kept, and parameters such as the speed of the trailer are recorded; when the patrol boat model 2 starts to stably slide, the electromagnetic emission control system 19 is started, based on the specified parameters, the electromagnetic target plate 1 is subjected to the application of theoretical repulsive magnetic force and action time of the electromagnetic block 20, and the instantaneous recoil force of the patrol boat model 2 in sliding after shells are emitted is simulated; after the electromagnetic launching control system 19 finishes launching impact, the patrol boat model 2 can generate certain-angle transverse inclination, and the high-speed hydrodynamic test trailer system 3 continues to operate at a constant speed until the transverse inclination of the patrol boat model 2 is basically finished; after each test is finished, recording the position of a time axis corresponding to the video in each video recorder; after the whole test is finished, analyzing and obtaining model resistance, a longitudinal inclination angle, a transverse inclination angle and gravity center heave of the patrol boat model 2 during sliding according to data measured by the single component force measuring sensor 11, the inclination angle sensor 17 and the stay wire type displacement sensor 18 recorded by the test data acquisition system 16; and then, the data analysis and processing personnel need to analyze the effectiveness of the collected resistance, the pitch angle, the roll angle and the gravity center heave of the patrol boat model 2 and reject failure data. Finally, model resistance, a pitch angle, a roll angle and gravity center heave of the patrol boat model 2 under a series of test states are determined, time history curves of the pitch angle and the roll angle of the patrol boat model 2 are analyzed, and the motion stability of the actual boat disturbed by external force in the process of sailing is forecasted.
And (3) evaluating test results:
and (4) the test data analysis processor judges the effectiveness of the model resistance, the pitch angle, the roll angle and the gravity center heave of the patrol boat model 2 obtained by testing, and eliminates failure data. And comparing and analyzing the model resistance, the pitch angle, the roll angle and the gravity center heave of the patrol boat model 2 with expected results, and preliminarily judging the validity and the reliability of the results. And analyzing and processing the abnormal data and giving a processing result.
The cannonball launching recoil simulating device is composed of an electromagnetic launching control system 19, an electromagnetic launching support frame 21 and an electromagnetic block 20, wherein the electromagnetic launching control system 19 is installed on the high-speed hydrodynamic test trailer system 3, the electromagnetic launching support frame 21 is fixedly connected with the aeronautical instrument 4 and the high-speed hydrodynamic test trailer system 3 respectively, and the electromagnetic block 20 is installed at the bottom of the electromagnetic launching support frame 21.
The cannonball launching recoil simulating device and the patrol boat model are installed in a separated mode.
The test principle is as follows:
before the test, the model weight, the towing speed, the magnitude of the simulated recoil force and the acting time are converted according to the Froude similarity according to the actual ship weight, the actual ship water-skiing speed, the magnitude of the recoil force and the acting time of the actual cannonball, and the configuration of the patrol boat model 2 is ensured to be similar to that of an actual ship. In the test, the test speed of the patrol boat model 2 is controlled by a high-speed hydrodynamic test trailer system, instantaneous simulated recoil force is transversely applied to the patrol boat model 2 through an electromagnetic emission control system after the model slides at a stable speed, model resistance, a longitudinal inclination angle, a transverse inclination angle and gravity center heave of the patrol boat model 2 are collected through a test data acquisition system, so that real ship resistance, the longitudinal inclination angle, the transverse inclination angle and the gravity center heave are converted, and the motion stability of the real ship disturbed by external force in the sailing process is forecasted.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A test method for simulating the influence of the recoil force of projectile launching on the stability of a patrol boat is characterized by comprising the following steps: the test method comprises the following steps:
a) installation of a patrol boat stability test model:
fixedly mounting an electromagnetic target plate (1) on a patrol boat model (2), and mounting the patrol boat model (2) on an airworthiness instrument (4) below a high-speed hydrodynamic test trailer system (3) to keep fixed; a front navigation piece (5) and a rear navigation piece (6) are respectively arranged on the bow and the stern of the patrol boat model (2), a front navigation rod (7) on the airworthiness instrument (4) is inserted into the front navigation piece (5), a rear navigation rod (8) is inserted into the rear navigation piece (6), and yawing can be avoided in the test process of the patrol boat model (2); a towing wheel rod (9) is installed at the front end of the airworthiness instrument (4), a towing wheel (10) is installed at the bottom of the towing wheel rod (9), a single-component force measuring sensor (11) is connected with a towing point (12) of the patrol boat model (2) through a steel wire rope towing line (13), and the towing line (13) is ensured to be positioned in a longitudinal section of the patrol boat model (2), so that the high-speed hydrodynamic test towing system (3) tows the patrol boat model (2) to move forwards in a test; after the patrol boat model (2) is submerged, adjusting and recording the fore-aft draught at two sides of the patrol boat model (2) to ensure that the reading of the patrol boat model is consistent with the theoretical value under the test state; the electromagnetic launching control system (19) is arranged in the high-speed hydrodynamic test trailer system (3), the electromagnetic block (20) is arranged at the bottom of the electromagnetic launching support frame (21), the electromagnetic launching control system (19) controls acting force and acting time between the electromagnetic block (20) and the electromagnetic target plate (1), and after the electromagnetic launching control system is electrified, the electromagnetic target plate (1) is subjected to instantaneous transverse magnetic force to simulate recoil force generated after the patrol boat model (2) launches a cannonball;
b) installing test equipment:
the equipment related to the patrol boat model (2) test comprises a video recorder (14), a video recording control system (15), a single-component force measuring sensor (11), a test data acquisition system (16), an inclination angle sensor (17), a stay wire type displacement sensor (18) and an electromagnetic emission control system (19); the video recorder (14) is installed in front of the patrol boat model (2), and the video recording control system (15) is installed in the high-speed hydrodynamic test trailer system (3) and used for controlling the video recorder (14) to be opened and closed and to be started and stopped; mounting the video recorder (14) below the high speed hydrodynamic test trailer system (3) using a video recorder mounting bracket (22) and ensuring that the video recorder (14) does not vibrate significantly during the test; the test data acquisition system (16) and the stay wire type displacement sensor (18) are installed in the high-speed hydrodynamic test trailer system (3), the tilt angle sensor (17) is installed at the bow position of the patrol boat model (2), and the test data acquisition system (16) is connected with the single-component force measuring sensor (11), the tilt angle sensor (17) and the stay wire type displacement sensor (18) through data transmission cables; the electromagnetic target plate (1) and the electromagnetic block (20) are connected with the electromagnetic emission control system (19) in the high-speed hydrodynamic test trailer system (3) through a special cable;
c) the experiment of simulating the impact of the recoil force of shell launching on the stability of the patrol boat:
before the test, recording the weight, the water temperature and the humidity of the patrol boat model (2); putting the patrol boat model (2) into a pool dock, and adjusting and recording the fore-aft draught at two sides of the patrol boat model (2); starting the test data acquisition system (16), and setting initial values measured by the single-component force measuring sensor (11), the inclination angle sensor (17) and the stay wire type displacement sensor (18) to be zero by using the test data acquisition system (16) under the condition of stable water surface after the state debugging of the patrol boat model (2) is completed;
during testing, the test data acquisition system (16) starts to acquire the model resistance of the patrol boat model (2) measured by the single-component force measuring sensor (11), the model pitch and roll angles of the patrol boat model (2) measured by the tilt sensor (17) and the linear displacement data measured by the stay wire type displacement sensor (18) in real time, and the video recorder (14) is started through the video recording control system (15); then the high-speed hydrodynamic test trailer system (3) starts to operate to drive the patrol boat model (2) to move forwards in an accelerated manner on the water surface, and when the trailer accelerates to reach the running speed required by the test, the constant speed is kept, and the speed of the trailer is recorded; when the patrol boat model (2) starts to stably slide, the electromagnetic emission control system (19) is started, and based on specified parameters, the electromagnetic target plate (1) is subjected to theoretical repulsive magnetic force and action time exerted by the electromagnetic block (20) to simulate the instantaneous recoil force of the patrol boat model (2) in sliding after shells are emitted; when the electromagnetic launching control system (19) finishes launching impact, the patrol boat model (2) can generate certain-angle transverse inclination, and the high-speed hydrodynamic test trailer system (3) continues to operate at a constant speed until the transverse inclination of the patrol boat model (2) is basically finished; after each test is finished, recording the position of a time axis corresponding to the video in each video recorder; after the whole test is finished, according to data measured by the single-component force measuring sensor (11), the inclination angle sensor (17) and the stay wire type displacement sensor (18) recorded by the test data acquisition system (16), model resistance, a pitch angle, a roll angle and gravity center heave of the patrol boat model (2) during sliding are obtained through analysis, time history curves of the pitch angle and the roll angle of the model are analyzed, and the motion stability of the real boat disturbed by external force in the sailing process is forecasted.
2. A test method for simulating the effect of recoil from projectile firing on the roll stability of a patrol boat as set forth in claim 1, wherein: the cannonball launching recoil simulating device of the patrol boat stability test model comprises an electromagnetic launching control system (19), an electromagnetic launching support frame (21) and an electromagnetic block (20), wherein the electromagnetic launching control system (19) is installed on the high-speed hydrodynamic test trailer system (3), the electromagnetic launching support frame (21) is fixedly connected with the aeronautical instrument (4) and the high-speed hydrodynamic test trailer system (3) respectively, and the electromagnetic block (20) is installed at the bottom of the electromagnetic launching support frame (21).
3. A test method for simulating the effect of recoil from projectile firing on the roll stability of a patrol boat as set forth in claim 2, wherein: the cannonball launching recoil simulating device and the patrol boat model (2) are installed in a separated mode.
4. A test method for simulating the effect of recoil from projectile firing on the roll stability of a patrol boat as set forth in claim 1, wherein: the step c) of analyzing the model resistance, the pitch angle, the roll angle and the gravity center heave of the patrol boat model (2) during sliding, analyzing the time history curves of the pitch angle and the roll angle of the model, and forecasting the motion stability of the actual boat disturbed by external force in the sailing process specifically comprises the following steps:
analyzing and obtaining model resistance, a pitch angle, a roll angle and gravity center heave of the patrol boat model (2) during sliding; and then analyzing the collected effectiveness of model resistance, pitch angle, roll angle and gravity center heave of the patrol boat model (2) by a data analysis processor, removing failure data, finally determining the model resistance, pitch angle, roll angle and gravity center heave of the patrol boat model (2) in a series of test states, analyzing the time history curves of the model pitch angle and roll angle of the patrol boat model (2), and forecasting the motion stability of the actual boat disturbed by external force in the sailing process.
5. A test method for simulating the effect of recoil from projectile firing on the roll stability of a patrol boat as set forth in claim 4, wherein: after the failure data are removed, the following steps are further included before model resistance, a pitch angle, a roll angle and gravity center heave of the patrol boat model (2) under a series of test states are finally determined: and comparing and analyzing the model resistance, the pitch angle, the roll angle and the gravity center heave of the patrol boat model (2) with expected results, and preliminarily judging the validity and the reliability of the results.
6. A test method for simulating the effect of recoil from projectile firing on the roll stability of a patrol boat as set forth in claim 1, wherein: before the test, the model weight, the towing speed, the magnitude of the simulated recoil force and the acting time are converted according to the Froude similarity according to the actual ship weight, the actual ship water-skiing speed and the magnitude of the recoil force and the acting time of the actual cannonball, and the configuration of the patrol ship model (2) is ensured to be similar to that of the actual ship; in the test, the test speed of the patrol boat model (2) is controlled by the high-speed hydrodynamic test trailer system (3), instantaneous simulated recoil force is transversely applied to the patrol boat model (2) through an electromagnetic emission control system after the patrol boat model (2) slides at a stable speed, model resistance, a pitch angle, a roll angle and gravity center heave of the patrol boat model (2) are collected through the test data collection system (16), and real ship resistance, the pitch angle, the roll angle and the gravity center heave are converted through the instantaneous simulated recoil force, so that the motion stability of the real ship disturbed by external force in the sailing process is forecasted.
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