CN116772654A - Barrel life prediction method - Google Patents
Barrel life prediction method Download PDFInfo
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- CN116772654A CN116772654A CN202210230805.XA CN202210230805A CN116772654A CN 116772654 A CN116772654 A CN 116772654A CN 202210230805 A CN202210230805 A CN 202210230805A CN 116772654 A CN116772654 A CN 116772654A
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- squat
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- recoil
- gun
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000006073 displacement reaction Methods 0.000 claims abstract description 96
- 238000012360 testing method Methods 0.000 claims abstract description 70
- 230000008569 process Effects 0.000 claims abstract description 9
- 230000009471 action Effects 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 6
- 238000004364 calculation method Methods 0.000 claims abstract description 5
- 238000005094 computer simulation Methods 0.000 claims abstract description 4
- 238000005299 abrasion Methods 0.000 claims description 7
- 238000004088 simulation Methods 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 2
- 230000007423 decrease Effects 0.000 claims 2
- 239000008188 pellet Substances 0.000 description 5
- 238000010304 firing Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A31/00—Testing arrangements
- F41A31/02—Testing arrangements for checking gun barrels
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a barrel life prediction method, which is an implementation method for predicting the barrel life by testing recoil displacement in the gun shooting process. 1) And obtaining the maximum recoil displacement allowable value of the recoil part under the action of the resultant force of the bore through computer simulation calculation by adopting a finite element method. 2) The artillery is arranged at a gun position, a laser displacement sensor is fixed on the upper surface of the cradle, and a reflecting plate is fixed on the upper surface of the gun tail. The reflecting plate can linearly move back and forth relative to the laser displacement sensor. 3) And shooting by using the gun, testing the squat displacement of the squat part by using the laser displacement sensor, and obtaining the maximum squat displacement through data processing. And continuously tracking and testing to obtain the total projectile number and the maximum recoil displacement test value. 4) Comparing the squat section maximum squat displacement test value to the squat section maximum squat displacement allowed value, and if the squat section maximum squat displacement test value is less than the squat section maximum squat displacement allowed value, ending the gun barrel life.
Description
Technical Field
The invention relates to a barrel life prediction method, in particular to a barrel life prediction implementation method by testing recoil displacement in the gun shooting process.
Technical Field
The development of modern high technology warfare places higher demands on weapons. Currently, artillery is moving toward increasing power, firing rate, and zone adaptability, which subjects the barrel to more severe ablative wear and heat. The barrel is an important part of the gun, and the service life of the barrel can limit the development of the gun. The barrel life refers to the time that the gun fires at the maximum allowable firing rate under normal conditions until the barrel falls to an allowable value at the ballistic index or the minimum number of projectiles that are fired at the instant the barrel is scrapped. Various nationists have established different terms defining the life of the barrel, such as the ballistic life, fatigue life, ultimate life, useful life, economic life, etc., from different angles. The gun firing process is very complex, the service life of the gun is difficult to be directly predicted during working, and a theoretical prediction method is often adopted to estimate the service life at present; therefore, the predicted result of the theoretical prediction method directly influences the combat effectiveness of the cannon.
At present, the method for evaluating the life of the gun barrel mainly comprises the steps of initial speed and rifling pressure reduction, obviously increases the density of a vertical target, has high fuze blind fire rate, cuts off a bullet belt, and exceeds the standard of rifling abrasion quantity. The initial speed traditional testing method is carried out by adopting a speed measuring radar with high price, and the cost is high. The measurement of the density of the vertical targets is organized by special test experiments, and the same cost is high. The phenomenon of belt light cutting can only be judged by recovering the pellets, but the recovery of the pellets is difficult, high in cost and low in efficiency. The rifling abrasion loss is measured by a special instrument after one shot, and the efficiency is low and the cost is high. How to obtain the characteristic quantity which can represent the life of the barrel by adopting a simple, convenient and efficient method so as to predict the pursuit target of the art of the gun for the life of the barrel.
The gun composition is simply classified into a barrel, a cradle, a recoil part, a landing part, a cradle, and the like. In the gun shooting process, the barrel generates recoil and recoil movements along the cradle guide rail, the barrel is the main body of the recoil part, and the recoil and recoil movements of the barrel can represent the recoil and recoil movements of the recoil part. Under the action of the resultant force of the bore, the recoil part sits first and then carries out the recoil movement under the action of the recoil force. When the gun is shot, as the number of projectiles increases, the diameter of the barrel bore increases under the action of ablative abrasion. The engineering practice statistics rule of the artillery shows that the barrel inner chamber is blown away about 20 g of metal substances by high-speed fuel gas every time the large-caliber artillery emits a bullet. If a gun fires 1000 shots, the barrel bore will lose about 20kg of metal mass. The result of this phenomenon is an enlarged barrel bore and an enlarged drug chamber. Under the condition of a certain loading amount, the chamber is increased, the chamber pressure is reduced, and the resultant force of the chamber is reduced. The recoil movement of the recoil portion is a result of the effect of the resultant force of the bore and, after the resultant force of the bore has fallen, the recoil displacement of the recoil portion is reduced.
Disclosure of Invention
In order to solve the problem of gun barrel life prediction, a barrel life prediction method is particularly provided, and the method for realizing the prediction of the barrel life by testing the recoil displacement of the gun in the shooting process is provided. The method comprises 1) obtaining the maximum recoil displacement of the recoil part under the action of the bore resultant force when the barrel chamber is expanded to an allowable value due to ablative abrasion by adopting a finite element method through computer simulation calculation. The squat section maximum squat displacement simulation value is defined as the squat section maximum squat displacement allowed value. 2) The artillery is arranged at a gun position, a laser displacement sensor is fixed on the upper surface of the cradle, and a reflecting plate is fixed on the upper surface of the gun tail. The reflecting plate can linearly move back and forth relative to the laser displacement sensor. 3) And shooting by using the gun, testing the squat displacement of the squat part by using the laser displacement sensor, and obtaining the maximum squat displacement through data processing. And continuously tracking and testing to obtain the test result of the total projectile number and the maximum recoil displacement. The squat section maximum squat displacement test result of the shooting test is defined as the squat section maximum squat displacement test value. 4) Comparing the squat section maximum squat displacement test value with the squat section maximum squat displacement allowed value, and if the squat section maximum squat displacement test value is less than or equal to the squat section maximum squat displacement allowed value, ending the gun barrel life. As the number of projectiles increases, the erosion wear of the chamber gradually expands, so does the resultant force of the bore, and the maximum recoil displacement of the recoil portion.
A barrel life prediction method has significant advantages. 1) A barrel life prediction solution is proposed which is different from the traditional method; 2) When the life of the barrel is predicted, a special test is not required to be organized, and only the recoil displacement is required to be monitored when the gun shoots; 3) The prediction process of the invention does not influence the normal shooting process of the gun, does not need redundant bullet consumption, and has high efficiency, low cost and ensured prediction precision; 4) The method has profound significance for improving the design level of the artillery weapon in China.
Drawings
FIG. 1 is a schematic diagram of a method for predicting barrel life. Wherein 1 represents a pellet; 2 represents a barrel; 3 represents a cradle; 4 represents a laser displacement sensor; 5 represents a laser; 6 denotes a reflection plate; 7 denotes a tail; 8 denotes a cradle. The barrel moves linearly relative to the cradle, i.e. the recoil is in the direction of the horizontal arrow in the figure, the tail is fixedly connected to the barrel, and the recoil of the tail is indicative of the recoil of the barrel. The laser displacement sensor is fixedly connected to the upper surface of the cradle, and the reflecting plate is fixedly connected to the upper surface of the tail. When the barrel is in squat, the barrel is driven to be in squat synchronously, meanwhile, the reflecting plate fixedly connected with the upper surface of the barrel is also in synchronous motion, the reflecting plate moves relative to the laser displacement sensor, the laser displacement sensor emits laser, the laser irradiates the reflecting plate, the laser is reflected by the reflecting plate and returns to the laser displacement sensor, and the barrel squat displacement is obtained by utilizing the triangle principle. The barrel and the tail are the main bodies of the recoil part, and recoil movements of the tail, the barrel and the recoil part are the same. The recoil displacement signals sensed by the laser displacement sensor are collected, processed and stored by the data collector and then displayed on a screen of the data collector, and the maximum recoil displacement of the barrel is used as a key parameter of whether the life of the barrel is ended or not. Under the effect of the resultant force of the bore, all the components involved in the recoil movement are called the recoil section, the barrel and the tail being the main bodies of the recoil section, the recoil movement of the barrel and the tail representing the movement of the recoil section, the maximum recoil displacement of the recoil section being its main characteristic quantity. The method of the invention relates to a standard artillery and a test artillery, wherein the standard artillery determines a recoil displacement allowable value, the test artillery determines a recoil displacement test value, and the test value is compared with the allowable value to judge whether the life of a tube of the test artillery is ended. The barrel inner bore is divided into a powder chamber and a pellet guiding section, and the space between the tail of the gun and the tail end of the pellet is the powder chamber and is the space for burning the gun. With the increase of the number of the projectiles, serious ablation and abrasion of the chamber can occur, metal on the inner surface of the chamber is blown away by high-speed fuel gas flow, and the chamber space can be gradually expanded.
Detailed Description
Specific methods of embodiments of the present invention are set forth below.
In order to solve the problem of gun barrel life prediction, a barrel life prediction method is particularly provided, and the method for realizing the prediction of the barrel life by testing the recoil displacement of the gun in the shooting process is provided. A barrel life prediction method relates to a standard gun and a test gun, wherein the standard gun determines a maximum recoil displacement allowable value of a recoil part, the test gun determines a maximum recoil displacement test value of the recoil part, and the maximum recoil displacement test value of the recoil part is compared with the maximum recoil displacement allowable value of the recoil part to judge whether the life of the barrel of the test gun reaches an end state or not. The squat section maximum squat displacement allowed value and the squat section maximum squat displacement test value are determined at an angle of 0 degrees. The barrel life prediction method is realized by the following steps:
step one: a standard gun is selected, and a finite element method is adopted to obtain a maximum recoil displacement simulation value of a recoil part under the action of a bore resultant force when a barrel powder chamber is expanded to a specified value due to ablation and abrasion through computer simulation calculation. The maximum squat displacement simulation value of the squat section when the barrel chamber is enlarged to a prescribed value is defined as the maximum squat displacement allowable value of the squat section. When the barrel chamber is enlarged to a predetermined value, it indicates that the life of the barrel has been terminated. The ablative wear causes not only the barrel chamber to expand, but also the barrel pilot section inner diameter, particularly the initial pilot section inner diameter. The enlarged barrel pilot section inner diameter also reduces the bore force. When the standard gun is in a new gun, shooting 3 shots, testing the squat displacement of the squat part, and correcting the calculation accuracy of the finite element simulation model by using the test result.
The second method for obtaining the maximum squat displacement allowable value of the squat section is to use a shooting method, select a standard gun, shoot the gun, and always monitor the squat displacement of the squat section. The gun is continuously shot until the barrel bore is ablated and worn until the life of the barrel is finished, and the maximum squat position at this time is determined as the maximum squat position allowable value.
Step two: the test cannon is arranged at a gun position, a laser displacement sensor is fixed on the upper surface of the cradle, and a reflecting plate is fixed on the upper surface of the gun tail. The reflecting plate can linearly move back and forth relative to the laser displacement sensor. The laser displacement sensor is connected to the data acquisition device through the signal wire, and the data acquisition device has the functions of signal acquisition, storage, processing and display. The data collector is arranged on the test vehicle.
Step three: and testing gun shooting, testing the squat displacement of the squat part by using a laser displacement sensor, and obtaining the maximum squat displacement through data processing. And (5) continuously shooting the test gun, and continuously tracking and testing to obtain the test result of the total number of projectiles and the maximum recoil displacement. As the number of projectiles increases, the barrel chamber gradually expands due to ablative wear, so does the resultant force of the bore, and the maximum recoil position of the recoil portion. The squat portion maximum squat displacement test obtained from the test gun firing test was defined as the squat portion maximum squat displacement test value.
Step four: comparing the maximum squat displacement test value of the squat with the maximum squat displacement allowable value of the squat, and if the maximum squat displacement test value of the squat is smaller than or equal to the maximum squat displacement allowable value of the squat, indicating that the life of the test gun barrel is in an end state.
Thus, the prediction of the gun barrel life is realized.
The squat section maximum squat displacement test value and the squat section maximum squat displacement allowed value are compared under the same conditions, and the squat section maximum squat displacement test value and the squat section maximum squat displacement allowed value are compared with full charge conditions.
Claims (1)
1. A barrel life prediction method is characterized by comprising the steps of testing the maximum recoil displacement of a recoil part in the shooting process of an artillery to predict the barrel life; a barrel life prediction method relates to a standard gun and a test gun, wherein the standard gun determines a maximum recoil displacement allowable value of a recoil part, the test gun determines a maximum recoil displacement test value of the recoil part, and the maximum recoil displacement test value of the recoil part is compared with the maximum recoil displacement allowable value of the recoil part to judge whether the life of the barrel of the test gun is in an end state or not; determining a squat portion maximum squat movement allowance value and a squat portion maximum squat movement test value at an angle of 0 degrees; the barrel life prediction method is realized by the following steps:
step one: selecting a standard gun, and obtaining a maximum recoil displacement simulation value of a recoil part under the action of a bore resultant force when a barrel chamber is expanded to a specified value due to ablative abrasion by adopting a finite element method through computer simulation calculation; defining a maximum squat displacement simulation value of the squat part when the barrel medicine chamber is enlarged to a specified value as a maximum squat displacement allowable value of the squat part;
step two: the test cannon is arranged at a gun position, a laser displacement sensor is fixed on the upper surface of the cradle, a reflecting plate is fixed on the upper surface of the gun tail, and the normal direction of the reflecting plate is parallel to the squat direction of the squat part; the reflecting plate can linearly move relative to the laser displacement sensor; the laser displacement sensor is connected to the data acquisition device through a signal wire, and the data acquisition device has the functions of signal acquisition, storage, processing and display; the data collector is arranged on the test vehicle;
step three: testing gun shooting, testing squat displacement of a squat part by a laser displacement sensor, and obtaining the maximum squat displacement of the squat part through data processing; continuously shooting the test cannon, continuously tracking and testing to obtain the test result of the total number of projectiles and the maximum recoil displacement of the recoil part; as the number of projectiles increases, the barrel chamber expands gradually due to ablative wear, the resultant force of the bore also decreases gradually, and the maximum recoil displacement of the recoil section also decreases gradually; the maximum squat displacement of the squat part obtained by the test gun shooting test is defined as a squat part maximum squat displacement test value;
step four: comparing the maximum squat displacement test value of the squat part with the maximum squat displacement allowable value of the squat part, and if the maximum squat displacement test value of the squat part is smaller than or equal to the maximum squat displacement allowable value of the squat part, indicating that the life of the test gun barrel is in an end state; otherwise, testing that the life of the gun barrel is not in an ending state;
in this way, barrel life prediction is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210230805.XA CN116772654A (en) | 2022-03-08 | 2022-03-08 | Barrel life prediction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210230805.XA CN116772654A (en) | 2022-03-08 | 2022-03-08 | Barrel life prediction method |
Publications (1)
| Publication Number | Publication Date |
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| CN116772654A true CN116772654A (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210230805.XA Pending CN116772654A (en) | 2022-03-08 | 2022-03-08 | Barrel life prediction method |
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| Country | Link |
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| CN (1) | CN116772654A (en) |
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2022
- 2022-03-08 CN CN202210230805.XA patent/CN116772654A/en active Pending
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