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강국정,이성배,김인우,홍석균 한국군사과학기술학회 2002 한국군사과학기술학회지 Vol.5 No.4
In this paper, we have studied the characteristics of a perforated muzzle brake. The main purpose of a muzzle brake is to reduce the momentum being applied to the recoil system. Muzzle brake redirect a portion of the exiting gases to the side exerting a forward force on the brake, thus reducing recoil. So it also reduces the recoil force which acts on the turret and vehicle. First of all, we analyzed the flow-field characteristics of muzzle brake using RAMPANT software. Then we investigated the influence of design parameters of perforated muzzle brake. Sixteen muzzle brakes were tested and evaluated for analyzing their influence on the muzzle brake efficiency. The muzzle brakes were designed to fit on a 40mm gun barrel. The strong dependent parameters of muzzle brake efficiency were the wall thickness(L/d ratio) and the area ratio AR. We designed the perforated muzzle brakes which have 10-20% efficiency. And we proposed a design method of perforated muzzle brake.
강국정,고성호,곽영균,이덕주,이인철,Kang, Kuk-Jeong,Ko, Sung-Ho,Kwak, Young-Kyun,Lee, Duck-Joo,Lee, In-Cheol 한국군사과학기술학회 2007 한국군사과학기술학회지 Vol.10 No.3
The present work addresses an experimental study on sound attenuation characteristics of silencer by live firing test. When a gun fires, there exists excessive noise which propagates as a form of blast wave. As muzzle energy of the weapon systems increases, the level of impulsive noise also increases. It is well known that the impulsive noise from a gun gives a serious damage to human bodies and structures. The adverse effects of impulsive sound also cause both social and military problems. So it is very important to study the characteristics of the impulsive sound attenuation. The live firing test is performed to evaluate the effect of four different silencers. The test result is compared with the case of bare muzzle which is not installed the silencer. The frequency characteristics are also analyzed to investigate the diminution of sound pressure level. The results of this study will be helpful to the designing silencer for large caliber weapon systems.
강국정,김학인(Gimm Hak Inn) 제어로봇시스템학회 2012 제어로봇시스템학회 합동학술대회 논문집 Vol.2012 No.7
The concept of soft recoil mechanism is to accelerate the recoiling parts forward prior to the firing and to fire the round when the forward momentum of the recoiling parts is attained for the required level. The conventional recoil mechanism for the gun is to provide the retarding force acting on the gun so as to brake the reward motion in the firing cycle. In recent years, the concept of the soft recoil mechanism has been developed. The soft recoil mechanism is introduced for reducing the firing shock and the reaction force due to the forward momentum of the recoiling parts prior to the firing. This paper is to analyze the theory of the soft recoil mechanism and to demonstrate the feasibility for the realistic application for a large caliber gun system. To do this, the numerical simulations for the recoil dynamics and the shock response analysis have been approached.
안상태,강국정,홍석균,Ahn, Sang-Tae,Kang, Kuk-Jung,Hong, Suk-Kyun 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.3
The necessity for harmonically growing of economy and environment has been on the rise late in the twentieth century. Green transformation is defined as efficiency enhancement of conventional guns and ammunitions. We also define green innovation as evolution of fire power systems breaking with conventional methodology. This kind of green innovation could even change a paradigm of warfare in the future. In this paper, we classify the green technology in the field of fire power into five technological groups, and the research and development trend of green technology in the field of fire power is analyzed.
박선영,배재성,황재혁,강국정,안상태,Park, Sun-Young,Bae, Jae-Sung,Hwang, Jai-Hyuk,Kang, Kuk-Jeong,Ahn, Sang-Tae 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.6
A soft-recoil or FOOB (Fire-Out-Of-Battery) system can reduce the recoil force considerably. Its firing sequency is different from that of a conventional or FIB (Fire-In-Battery) system. In FOOB system, the gun is latched and preloaded in its battery position prior to firing. When unlatched, the gun is accelerated to the forward direction and then the forward momentum of the recoil part is generated. Since this momentum reduces the recoil impulse, the recoil force will decrease significantly. When designing the soft-recoil system it is important to design the forward momentum profile of a recoiling part. In the present study, the method to determine the forward momentum has been studied and its optimum value has been obtained theoretically. The numerical simulation of the soft-recoil system is performed to show that the present soft-recoil system works functionally well.
배재성,신철봉,황재혁,강국정,Bae, Jae-Sung,Shin, Chul-Bong,Hwang, Jai-Hyuk,Kang, Kuk-Jeong 한국군사과학기술학회 2008 한국군사과학기술학회지 Vol.11 No.4
In order to reduce the level of recoil force, new recoil technology must be employed. The present study discusses a soft-recoil system that can reduce dramatically the recoil force. The firing sequence of the soft recoil system is radically different from that of a conventional system. The gun is latched and preloaded in its out-of-battery position prior to firing. When unlatched, the gun is accelerated and forward momentum is imparted to the recoiling parts. This momentum is opposed by the ballistic force imparted by firing and the recoil force and stoke will be reduced. In the present study, the soft-recoil system with hydraulic dampers is simulated and its characteristics are investigated theoretically. The results of the simulation show that the soft-recoil system could dramatically reduce the recoil force and the recoil stroke compared to the conventional recoil systems. However, the soft-recoil system was not able to perform well when the firing fault modes like prefire, hang-fire, and misfire happen. Hence, we need to employ a control algorithm to prevent the damage of the recoil system due to these fault mode.