CN117989918A - Extreme impact load loading device - Google Patents

Extreme impact load loading device Download PDF

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Publication number
CN117989918A
CN117989918A CN202410091298.5A CN202410091298A CN117989918A CN 117989918 A CN117989918 A CN 117989918A CN 202410091298 A CN202410091298 A CN 202410091298A CN 117989918 A CN117989918 A CN 117989918A
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gas
impact load
pressure
load loading
extreme impact
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张龙
钱林方
佟明昊
陈光宋
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Northwest Institute Of Mechanical & Electrical Engineering
Nanjing University of Science and Technology
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Northwest Institute Of Mechanical & Electrical Engineering
Nanjing University of Science and Technology
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41AFUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A31/00Testing arrangements

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  • General Engineering & Computer Science (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention discloses an extreme impact load loading device, comprising: the gas-sealed latch body is arranged at the bottom of the gas chamber, the charging structure is arranged in the gas chamber and is adjacent to the gas-sealed latch body, the driving force generating device is used for generating extreme impact load with transient action under the action of high-pressure gas, the load loading connector is arranged in the gas chamber and is connected with the tested stress device through the load loading connector, and the extreme impact load is transmitted to the tested device according to the required load loading direction.

Description

一种极端冲击载荷加载装置Extreme impact load loading device

技术领域Technical Field

本发明属于火炮发射冲击载荷技术领域,具体为一种极端冲击载荷加载装置。The invention belongs to the technical field of artillery launch impact loads, and in particular relates to an extreme impact load loading device.

背景技术Background technique

火炮发射时,火药燃气作用于弹丸上推动弹丸高速运动的同时,其反作用的炮膛合力也同时作用于炮身上,对其产生巨大的冲击载荷,该极端冲击载荷的作用过程及其规律对火炮的摇架、反后坐装置、上架、大架等结构设计至关重要,是决定火炮发射稳定性、可靠性、安全性等的关键。因此,研究可快速构建且试验条件要求低的火炮发射过程冲击载荷作用试验方法和装置,是支撑火炮高效设计与验证的重要手段。When the gun is fired, the gunpowder gas acts on the projectile to push the projectile to move at high speed, and the reactionary force of the barrel also acts on the gun body, generating a huge impact load. The action process and law of this extreme impact load are crucial to the structural design of the gun's cradle, recoil device, upper frame, and main frame, and are the key to determining the stability, reliability, and safety of the gun firing. Therefore, studying the test method and device for the impact load effect during the gun firing process that can be quickly constructed and has low test conditions is an important means to support the efficient design and verification of guns.

传统的火炮冲击载荷的试验研究方法主要是采用火炮实际发射进行验证,该方法能够真实、准确的验证火炮极端冲击的作用过程及其对结构的影响。但是,由于其必须构建完整的火炮发射装置才能进行相应的试验验证,装置构建周期长、成本高,且需要发射弹丸,试验条件复杂、试验场地要求高,且存在安全性风险,难以满足前期原理验证要求,特别是无法为初步设计提供试验验证条件,制约火炮的优化设计。The traditional test research method for artillery impact load is mainly to verify by actual artillery firing. This method can truly and accurately verify the action process of artillery extreme impact and its impact on the structure. However, since it is necessary to build a complete artillery launch device to carry out the corresponding test verification, the device construction cycle is long and the cost is high, and it is necessary to launch projectiles. The test conditions are complex, the test site requirements are high, and there are safety risks. It is difficult to meet the requirements of early principle verification, especially it is impossible to provide test verification conditions for the preliminary design, which restricts the optimization design of the artillery.

液压人工后坐试验系统是一种模拟火炮复进试验装置,该系统将液压油缸装到火炮复进机前段,利用高压液体推动复进机内带活塞的复进杆向后移动带动火炮后坐,当火炮后坐到预定位置后,液压系统快速卸载,炮身在复进机内受压缩的气体的作用下自动开始复进。该方法虽然能够使火炮后坐并模拟复进过程,但是由于其采用液压加载,无法模拟火炮发射过程中的冲击载荷,只能用于复进机的设计验证。The hydraulic artificial recoil test system is a device for simulating the recoil test of artillery. The system installs the hydraulic cylinder to the front section of the recoil mechanism of the artillery, and uses high-pressure liquid to push the recoil rod with a piston in the recoil mechanism to move backward to drive the artillery to recoil. When the artillery recoils to the predetermined position, the hydraulic system is quickly unloaded, and the gun body automatically begins to recoil under the action of the compressed gas in the recoil mechanism. Although this method can make the artillery recoil and simulate the recoil process, it cannot simulate the impact load during the artillery firing process because it uses hydraulic loading, and can only be used for the design verification of the recoil mechanism.

发明内容Summary of the invention

本发明提出了一种极端冲击载荷加载装置,利用炮口制退器作用原理,采用反向安装的炮口制退器,通过高压火药燃气作用与反向炮口制退器模拟火炮发射时的炮膛合力,加载于火炮结构上,实现极端载荷动态加载。The present invention proposes an extreme impact load loading device, which utilizes the working principle of a muzzle brake and adopts a reversely installed muzzle brake. The device simulates the combined force of the gun barrel when the gun is fired through the action of high-pressure gunpowder gas and the reverse muzzle brake, and loads it on the gun structure to achieve extreme load dynamic loading.

实现本发明目的的技术方案为:一种极端冲击载荷加载装置,包括:气体密闭闩体、装药结构、燃气腔室、推动力产生装置、载荷加载连接器,所述气体密闭闩体设置在燃气腔室的底部,所述装药结构设置在燃气腔室内,且与气体密闭闩体相邻,所述推动力产生装置用于在高压燃气作用下产生瞬态作用的极端冲击载荷,所述载荷加载连接器设置在燃气腔室,通过载荷加载连接器与被测试的受力装置连接,将极端冲击载荷按要求的载荷加载方向传递到被测试装置上。The technical solution for achieving the purpose of the present invention is: an extreme impact load loading device, comprising: a gas-tight latch body, a charge structure, a gas chamber, a driving force generating device, and a load loading connector, wherein the gas-tight latch body is arranged at the bottom of the gas chamber, the charge structure is arranged in the gas chamber and is adjacent to the gas-tight latch body, the driving force generating device is used to generate a transient extreme impact load under the action of high-pressure gas, and the load loading connector is arranged in the gas chamber and is connected to the force-bearing device being tested through the load loading connector to transfer the extreme impact load to the tested device according to the required load loading direction.

优选地,所述推动力产生装置采用冲击式或反作用式炮口制退器结构,且用前端挡板封闭制退器的中央弹孔,只留有侧孔,用于在高压燃气作用下产生瞬态作用的极端冲击载荷。Preferably, the propulsion force generating device adopts an impact type or reaction type muzzle brake structure, and uses a front end baffle to close the central bullet hole of the muzzle brake, leaving only side holes, which are used to generate transient extreme impact loads under the action of high-pressure gas.

优选地,所述装药结构包括药筒、固体发射装药、压力释放孔,所述药筒设置在燃气腔室内部,与气体密闭闩体相邻,所述固体发射装药设置在药筒内,所述压力释放孔设置在药筒远离密闭闩体的一端。Preferably, the charge structure includes a cartridge, a solid propellant charge, and a pressure release hole. The cartridge is arranged inside the gas chamber, adjacent to the gas-tight latch body, the solid propellant charge is arranged in the cartridge, and the pressure release hole is arranged at one end of the cartridge away from the gas-tight latch body.

优选地,通过对固体发射装药和压力释放孔进行调节,形成期望的加载力曲线。Preferably, a desired loading force curve is formed by adjusting the solid propellant charge and the pressure release holes.

优选地,通过对固体发射装药和压力释放孔进行调节,形成期望的加载力曲线的具体方法为:Preferably, the specific method of forming a desired loading force curve by adjusting the solid propellant charge and the pressure release hole is:

依据发射装药燃烧方程计算发射药燃烧比与产生压力的关系Calculate the relationship between the propellant combustion ratio and the generated pressure based on the propellant charge combustion equation

其中,Ψ为火药已燃百分数,χ,λ,μ为火药形状特征量,Z为火药已燃相对厚度,t为时间,u1为燃速常数,p为燃气压力,n为燃速指数,e1为1/2火药起始厚度;Among them, Ψ is the percentage of gunpowder burned, χ, λ, μ are the characteristics of gunpowder shape, Z is the relative thickness of gunpowder burned, t is time, u 1 is the burning rate constant, p is the gas pressure, n is the burning rate index, and e 1 is 1/2 the initial thickness of gunpowder;

通过控制发射装药药型和压力释放孔的流量控制燃气压力,燃气压力作用于推动力产生装置的火药燃气前端挡板和制退器结构作用面上,产生相应的作用力;The gas pressure is controlled by controlling the propellant charge type and the flow rate of the pressure release hole. The gas pressure acts on the front baffle of the propellant gas of the propulsion force generating device and the action surface of the recoil brake structure, generating corresponding force.

设前端挡板和制退器结构作用面总面积等效到燃气腔室轴向方向上的面积为S,则产生的冲击载荷为F(t)=pa(t)S,其中pa(t)为推动力产生装置口部压力随时间变化值,F(t)为冲击载荷随时间变化值,即加载力曲线。Assuming that the total area of the front baffle and the recoil brake structure is equivalent to the area in the axial direction of the gas chamber as S, the impact load generated is F(t)= pa (t)S, where p a (t) is the pressure change of the propulsion force generating device over time, and F(t) is the impact load change over time, that is, the loading force curve.

本发明与现有技术相比,其显著优点为:Compared with the prior art, the present invention has the following significant advantages:

本发明提供的一种极端冲击载荷加载装置能够实现与火炮弹丸发射真实过程规律一致的冲击载荷加载,相比真实的火炮射击试验,不用发射弹丸,由于没有从火炮身管中飞出的高速弹丸,所以对试验场地没有靶道、弹丸落点控制、掩体等复杂要求,大幅降低了试验组织难度,提升了试验安全性,提高了试验效率。The extreme impact load loading device provided by the present invention can achieve impact load loading that is consistent with the actual process law of artillery projectile firing. Compared with the actual artillery shooting test, there is no need to fire projectiles. Since there are no high-speed projectiles flying out of the artillery barrel, there are no complex requirements for the test site such as target tracks, projectile landing point control, and bunkers, which greatly reduces the difficulty of test organization, improves test safety, and improves test efficiency.

本发明采用的药筒上带有压力释放孔的装药结构,能够实现发射药燃烧过程控制及其压力调节,通过发射药量和压力释放孔大小的调节,可以实现不同极端冲击载荷曲线的加载,相比传统的液压人工后坐试验系统或静态加载试验方法,能够实现与火炮射击过程相吻合的动态载荷加载,加载真实度更高,可调节性更强。The charging structure with pressure release holes on the cartridge adopted by the present invention can realize the control of the propellant combustion process and the pressure regulation. By adjusting the propellant amount and the size of the pressure release hole, the loading of different extreme impact load curves can be realized. Compared with the traditional hydraulic artificial recoil test system or static loading test method, it can realize dynamic load loading consistent with the artillery shooting process, with higher loading authenticity and stronger adjustability.

本发明提供的推动力产生装置带有前端挡板,能够直接与身管喷出的高压燃气作用,大幅增大高压燃气作用面积,产生更大的反向冲击力,相比传统的制退器作用力大幅增加,可以解决极端冲击载荷模拟加载峰值难以提高的问题。The thrust generating device provided by the present invention has a front-end baffle, which can directly react with the high-pressure gas ejected from the barrel, greatly increasing the action area of the high-pressure gas and generating a greater reverse impact force. Compared with traditional muzzle brakes, the force is greatly increased, which can solve the problem that the peak value of extreme impact load simulation loading is difficult to increase.

本发明提供的载荷加载连接器可以根据需要与不同的装置连接,相比真实射击试验或者液压人工后坐试验系统等具有灵活性更高、适用范围更广的优势,可以扩展应用于模拟火箭、导弹等发射过程不同阶段中的大推力载荷作用。The load loading connector provided by the present invention can be connected to different devices as needed. Compared with real shooting tests or hydraulic artificial recoil test systems, it has the advantages of higher flexibility and wider application range, and can be expanded to simulate the high thrust load effects in different stages of the launch process of rockets, missiles, etc.

下面结合附图对本发明做进一步详细的描述。The present invention is described in further detail below in conjunction with the accompanying drawings.

附图说明BRIEF DESCRIPTION OF THE DRAWINGS

图1为本发明实施例提供的极端载荷加载装置示意图。FIG1 is a schematic diagram of an extreme load loading device provided in an embodiment of the present invention.

图2为本发明实施例提供的一种火炮反后坐装置极端冲击载荷加载试验示意图。FIG2 is a schematic diagram of an extreme impact load loading test of a gun recoil device provided in an embodiment of the present invention.

图3为本发明实施例提供的一种火炮反后坐装置极端冲击载荷作用力随时间变化的曲线。FIG3 is a curve showing the change of the extreme impact load force of a gun recoil device over time provided by an embodiment of the present invention.

具体实施方式Detailed ways

下面结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述。显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

本发明的构思为:一种极端冲击载荷加载装置,包括气体密闭闩体、药筒、固体发射装药、压力释放孔、燃气腔室、推动力产生装置、载荷加载连接器。The concept of the present invention is: an extreme impact load loading device, including a gas-tight latch body, a cartridge, a solid propellant charge, a pressure release hole, a combustion gas chamber, a propulsion force generating device, and a load loading connector.

其中,密闭闩体位于燃气腔室底端,打开时用于发射装药的装填,关闭时密封高压燃气;药筒、固体发射装药、压力释放孔组成用于产生高压燃气的装药结构,击发后固体发射装药燃烧产生高压燃气,高压燃气通过压力释放孔控制流量进入燃气腔室内;燃气腔室是高压燃气压力膨胀和流出的空间;推动力产生装置原理与火炮炮口制退器相同,可以采用冲击式或反作用式炮口制退器结构,且用前端挡板封闭制退器的中央弹孔,只留有侧孔,用于在高压燃气作用下产生瞬态作用的极端冲击载荷;载荷加载连接器用于与被测试的受力装置连接,将极端冲击载荷按要求的载荷加载方向传递到被测试装置上,其作用力方向与高压燃气出口方向相同。Among them, the closed latch body is located at the bottom of the gas chamber. When it is opened, it is used to load the propellant charge, and when it is closed, it seals the high-pressure gas. The cartridge, solid propellant charge, and pressure release hole constitute a charge structure for generating high-pressure gas. After firing, the solid propellant charge burns to generate high-pressure gas, and the high-pressure gas enters the gas chamber through the pressure release hole to control the flow rate; the gas chamber is the space for the pressure expansion and outflow of the high-pressure gas pressure; the principle of the propulsion force generating device is the same as that of the artillery muzzle brake, and an impact type or reaction type muzzle brake structure can be adopted, and the central bullet hole of the brake is closed with a front end baffle, leaving only side holes for generating transient extreme impact loads under the action of high-pressure gas; the load loading connector is used to connect with the force-bearing device being tested, and transfer the extreme impact load to the tested device according to the required load loading direction, and its force direction is the same as the high-pressure gas outlet direction.

由药筒、固体发射装药、压力释放孔组成的装药结构是以发射药为能量源,击发后发射装药燃烧产生高压燃气,为了使高压燃气以适当的压力和流速作用于推力产生装置上,药筒前端设计了一组压力释放孔,用来控制燃气流量以达到燃气腔室压力可控的目的。The charge structure consisting of a cartridge, solid propellant, and pressure release holes uses propellant as the energy source. After firing, the propellant burns to produce high-pressure combustion gas. In order to make the high-pressure combustion gas act on the thrust generating device with appropriate pressure and flow rate, a group of pressure release holes are designed at the front end of the cartridge to control the gas flow rate so as to achieve the purpose of controllable gas chamber pressure.

当高压燃气通过燃气腔室进入推动力产生装置内,由于装置内的截面大于燃气腔室连接部的截面,其侧面又开有导流通孔,因而气体加速膨胀。其中一部分气体向前流出作用于前端挡板上,产生推动装置运动的作用力,另一部分则改变流动方向进入侧孔,经导流面排出,同样产生推动装置运动的作用力,两者结合生成极端冲击载荷。When high-pressure gas enters the driving force generating device through the gas chamber, the gas expands faster because the cross section inside the device is larger than the cross section of the gas chamber connection part and there are flow guide holes on its side. Part of the gas flows forward and acts on the front baffle, generating a force to drive the device to move, while the other part changes the flow direction and enters the side hole, and is discharged through the flow guide surface, also generating a force to drive the device to move. The combination of the two generates an extreme impact load.

极端冲击载荷的规律可通过对固体发射装药和压力释放孔进行调节,形成期望的加载力曲线。依据发射药燃烧方程可以计算发射药燃烧比与产生压力的关系The law of extreme impact load can be adjusted by adjusting the solid propellant charge and the pressure release hole to form the desired loading force curve. The relationship between the propellant combustion ratio and the generated pressure can be calculated based on the propellant combustion equation.

其中,Ψ为火药已燃百分数,χ,λ,μ为火药形状特征量,Z为火药已燃相对厚度,t为时间,u1为燃速常数,p为燃气压力,n为燃速指数,e1为1/2火药起始厚度。通过药型和压力释放孔的流量可以控制燃气压力,燃气压力作用于推动力产生装置的火药燃气前端挡板和制退器结构作用面上,产生相应的作用力。假设前端挡板和制退器结构作用面总面积等效到燃气腔室轴向方向上的面积为S,则其产生的冲击载荷为F(t)=pa(t)S,其中pa(t)为推动力产生装置口部压力随时间变化值,F(t)为冲击载荷随时间变化值,即加载力曲线。Among them, Ψ is the percentage of gunpowder burned, χ, λ, μ are the characteristics of gunpowder shape, Z is the relative thickness of gunpowder burned, t is time, u1 is the burning rate constant, p is the gas pressure, n is the burning rate index, and e1 is 1/2 of the starting thickness of gunpowder. The gas pressure can be controlled by the flow of the charge type and the pressure release hole. The gas pressure acts on the front baffle of the gunpowder gas of the propulsion generating device and the action surface of the recoil device structure to generate corresponding force. Assuming that the total area of the front baffle and the recoil device structure action surface is equivalent to the area in the axial direction of the gas chamber S, the impact load generated is F(t)= pa (t)S, where pa (t) is the value of the pressure change of the mouth of the propulsion generating device over time, and F(t) is the value of the impact load change over time, that is, the loading force curve.

载荷加载连接器用于与受力装置相连接,高压燃气在燃气腔室内的流动方向即作用力方向,连接时将受力装置的载荷加载方向保持与燃气腔室的轴向平行,紧固连接后即可进行加载试验。The load-loading connector is used to connect to the force-bearing device. The flow direction of the high-pressure gas in the gas chamber is the direction of the force. When connecting, the load-loading direction of the force-bearing device is kept parallel to the axial direction of the gas chamber. After tightening the connection, the loading test can be carried out.

本发明的工作原理是利用多级并联的火箭发动机为动力,通过控制火箭发动机的推力模拟火炮发射时的炮膛合力,加载与火炮结构上,为火炮结构设计提供验证条件。The working principle of the present invention is to utilize multi-stage parallel rocket engines as power, simulate the combined force of the gun barrel when the artillery is fired by controlling the thrust of the rocket engines, load it on the artillery structure, and provide verification conditions for the artillery structure design.

实施例Example

一种极端冲击载荷加载装置,该装置组成如图1所示,包括气体密闭闩体1、药筒2、固体发射装药3、压力释放孔4、燃气腔室5、推动力产生装置6、载荷加载连接器7。其中密闭闩体1位于燃气腔室5底端,打开时用于发射装药的装填,关闭时密封高压燃气;所述药筒2设置在燃气腔室5内部,固体发射装药3设置在燃气腔室5内,所述压力释放孔4设置在药筒2远离密闭闩体1的一端,所述推动力产生装置6用于在高压燃气作用下产生瞬态作用的极端冲击载荷,所述载荷加载连接器7设置在燃气腔室5,通过载荷加载连接器7与被测试的受力装置连接,将极端冲击载荷按要求的载荷加载方向传递到被测试装置上,极端冲击载荷的作用力方向与高压燃气出口方向相同。An extreme impact load loading device, as shown in FIG1, comprises a gas-sealed latch body 1, a cartridge 2, a solid propellant charge 3, a pressure release hole 4, a gas chamber 5, a driving force generating device 6, and a load loading connector 7. The sealed latch body 1 is located at the bottom of the gas chamber 5, and is used to load the propellant charge when opened, and seals the high-pressure gas when closed; the cartridge 2 is arranged inside the gas chamber 5, the solid propellant charge 3 is arranged in the gas chamber 5, the pressure release hole 4 is arranged at one end of the cartridge 2 away from the sealed latch body 1, the driving force generating device 6 is used to generate a transient extreme impact load under the action of high-pressure gas, the load loading connector 7 is arranged in the gas chamber 5, and is connected to the tested force-bearing device through the load loading connector 7, so as to transfer the extreme impact load to the tested device according to the required load loading direction, and the force direction of the extreme impact load is the same as the direction of the high-pressure gas outlet.

进一步地,药筒2、固体发射装药3、压力释放孔4组成用于产生高压燃气的装药结构,击发后固体发射装药3燃烧产生高压燃气,高压燃气通过压力释放孔4控制流量进入燃气腔室5内;燃气腔室5是高压燃气压力膨胀和流出的空间;推动力产生装置6原理与火炮炮口制退器相同,可以采用冲击式或反作用式炮口制退器结构,且用前端挡板封闭制退器的中央弹孔,只留有侧孔,用于在高压燃气作用下产生瞬态作用的极端冲击载荷。Furthermore, the cartridge 2, the solid propellant charge 3, and the pressure release hole 4 constitute a charge structure for generating high-pressure gas. After firing, the solid propellant charge 3 burns to generate high-pressure gas, and the high-pressure gas enters the gas chamber 5 through the pressure release hole 4 to control the flow rate; the gas chamber 5 is a space for the pressure expansion and outflow of the high-pressure gas; the principle of the propulsion force generating device 6 is the same as that of the muzzle brake of a gun, and an impact type or reaction type muzzle brake structure can be adopted, and the central bullet hole of the brake is closed with a front end baffle, leaving only side holes, which are used to generate transient extreme impact loads under the action of high-pressure gas.

本实施例提供一种极端冲击载荷加载装置用于火炮反后坐装置试验的使用实例,如图2所示。火炮被固定支架10牢固约束于地面上,载荷加载连接器7紧箍于火炮身管8前端,极端冲击载荷通过身管及其支撑结构传递到反后坐装置9上,用于进行试验加载,为了保证试验时身管的稳定性,可以在身管前端加装支撑装置11。This embodiment provides an example of using an extreme impact load loading device for a gun recoil device test, as shown in Figure 2. The gun is firmly restrained on the ground by a fixed bracket 10, and a load loading connector 7 is tightly clamped on the front end of the gun barrel 8. The extreme impact load is transmitted to the recoil device 9 through the barrel and its supporting structure for test loading. In order to ensure the stability of the barrel during the test, a support device 11 can be installed at the front end of the barrel.

试验加载时,以由药筒2、固体发射装药3、压力释放孔4组成的装药结构为能量源,现将装药结构装填入燃气腔室5后端,关闭密闭闩体1,然后击发固体发射装药3,固体发射装药3燃烧产生高压燃气,为了使高压燃气以适当的压力和流速作用于推力产生装置6上,药筒2前端设计了一组压力释放孔4,用来控制燃气流量以达到燃气腔室压力可控的目的。During the test loading, the charge structure consisting of the cartridge 2, the solid propellant charge 3, and the pressure release hole 4 is used as the energy source. The charge structure is now loaded into the rear end of the gas chamber 5, the sealed latch body 1 is closed, and then the solid propellant charge 3 is fired. The solid propellant charge 3 burns to produce high-pressure gas. In order to make the high-pressure gas act on the thrust generating device 6 at an appropriate pressure and flow rate, a group of pressure release holes 4 are designed at the front end of the cartridge 2 to control the gas flow rate so as to achieve the purpose of controllable gas chamber pressure.

当高压燃气通过燃气腔室5进入推动力产生装置6内,由于装置内的截面大于燃气腔室连接部的截面,其侧面又开有导流通孔,因而气体加速膨胀。其中一部分气体向前流出作用于前端挡板上,产生推动装置运动的作用力,另一部分则改变流动方向进入侧孔,经导流面排出,同样产生推动装置运动的作用力,两者结合生成极端冲击载荷。When the high-pressure gas enters the driving force generating device 6 through the gas chamber 5, the gas expands faster because the cross section inside the device is larger than the cross section of the gas chamber connection part and the side of the device has a guide hole. Part of the gas flows forward and acts on the front baffle, generating a force to drive the device to move, while the other part changes the flow direction and enters the side hole, and is discharged through the guide surface, also generating a force to drive the device to move. The combination of the two generates an extreme impact load.

极端冲击载荷的规律可通过固体发射装药和压力释放孔进行调节,形成如图3所示的加载力曲线。The law of extreme impact load can be adjusted by solid propellant charge and pressure release holes to form a loading force curve as shown in Figure 3.

以上对本发明所提供的一种极端冲击载荷加载装置进行了详细介绍,本文中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想;同时,对于本领域的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本发明的限制。The above is a detailed introduction to an extreme impact load loading device provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in this field, according to the idea of the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims (5)

1. An extreme impact load loading device, comprising: the gas-sealed latch body is arranged at the bottom of the gas chamber, the charging structure is arranged in the gas chamber and is adjacent to the gas-sealed latch body, the driving force generating device is used for generating extreme impact load with transient action under the action of high-pressure gas, the load loading connector is arranged in the gas chamber and is connected with the tested stress device through the load loading connector, and the extreme impact load is transmitted to the tested device according to the required load loading direction.
2. The extreme impact load loading device according to claim 1, wherein the driving force generating device adopts an impact type or reaction type muzzle brake structure, and a front end baffle plate is used for sealing a central bullet hole of the brake, and only a side hole is reserved for generating extreme impact load with transient action under the action of high-pressure gas.
3. The extreme impact load loading device of claim 1, wherein the charge structure comprises a cartridge disposed within the gas chamber adjacent the gas-tight latch, a solid propellant charge disposed within the cartridge, and a pressure relief aperture disposed at an end of the cartridge remote from the gas-tight latch.
4. The extreme impact load loading device of claim 1 wherein the desired loading force profile is created by adjusting the solid propellant charge and the pressure relief orifice.
5. The extreme impact load loading device of claim 1 wherein the specific method of creating the desired loading force profile by adjusting the solid propellant charge and the pressure relief orifice is:
Calculating the relation between the propellant charge combustion ratio and the generated pressure according to the propellant charge combustion equation
Wherein, ψ is the burnt percentage of gunpowder, χ, λ, μ is the shape characteristic quantity of the gunpowder, Z is the burnt relative thickness of the gunpowder, t is time, u 1 is the burning rate constant, p is the gas pressure, n is the burning rate index, e 1 is 1/2 of the initial thickness of the gunpowder;
Controlling the gas pressure by controlling the flow of the powder-filled powder type and the pressure release hole, wherein the gas pressure acts on the powder gas front end baffle plate of the driving force generating device and the acting surface of the brake structure to generate corresponding acting force;
If the total area of the front end baffle and the acting surface of the brake structure is equivalent to the area in the axial direction of the gas chamber as S, the generated impact load is F (t) =p a (t) S, wherein p a (t) is the time-varying value of the mouth pressure of the driving force generating device, and F (t) is the time-varying value of the impact load, namely the loading force curve.
CN202410091298.5A 2024-01-23 2024-01-23 Extreme impact load loading device Pending CN117989918A (en)

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