• 한국군사과학기술학회지
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• 제16권5호
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• pp.590-597
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• 2013

For a lower tier defense, the distance between a launcher and an engagement control station is quite important to estimate the proper defense area and to effectively arrange missile launchers. In this paper, we have analyzed an effectiveness of anti-ballistic missile launcher arrangement for the lower tier defense against the ballistic missile. The operation concept, specific configuration and aerodynamic characteristics of the ballistic missile such as SCUD-B/C, Nodong are considered in order to develop a realistic engagement simulation. The diverse engagement results through numerical simulations are provided to conduct the effectiveness analysis of anti-ballistic missiles.

• 시스템엔지니어링학술지
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• 제16권2호
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• pp.131-140
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• 2020

The characteristics of ballistic missiles are changing rapidly but studies have mostly focused on fragmentary flight trajectory analysis estimating the changing characteristics of some types, while there is a lack of research on comprehensive and efficient ballistic search, detection and prediction for missiles including the new types that have been gaining attention lately. This paper analyzes the flight trajectory characteristics of ballistic missiles at various ranges considering flight path angle adjustment, specific impulse and drag force with altitude based on the optimized equations of motion reflecting the parameters of North Korea's general and new types of ballistic missiles. The flight trajectory characteristics of representative ranges for each ballistic missile were analyzed by adjusting the flight path angle in the minimum energy method, lofted method, and depressed method. In addition, High value target can attacked by ballistic missiles considering flight path angle adjustment at various points. It's expected to be used to Threat Evaluation and Weapon Allocation, and deployment of defense systems by interpreting the analysis of the latest Iskander-class ballistic missiles and the new multiple rocket launcher.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2017년도 제48회 춘계학술대회논문집
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• pp.1176-1179
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• 2017

본 연구에서는 이종추진제를 적용한 이중추력형 고체 추진기관의 내탄도 해석 이론을 정립하였고 이 이론을 바탕으로 내탄도 해석 모델을 개발하였다. 이종추진제를 적용한 이중추력형 고체 추진기관의 내탄도 해석은 임의의 값의 이종추진제를 적용하여 수행하였고 그 결과를 분석하였다. 이를 통해 본 해석 모델이 이종추진제를 적용한 이중추력형 고체 추진기관의 내탄도 해석에 적용 가능성을 확인하였다.

• Structural Engineering and Mechanics
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• 제60권5호
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• pp.829-849
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• 2016

In this paper, experimental as well as numerical analysis of Glass Fiber Reinforced Polymer (GFRP) laminated composite has been presented under ballistic impact with varying projectile nose shapes (conical, ogival and spherical) and incidence velocities. The experimental impact tests on GFRP composite plate reinforced with woven glass fiber ($0^{\circ}/90^{\circ}$)s are performed by using pneumatic gun. A three dimensional finite element model is developed in AUTODYN hydro code to validate the experimental results and to study the ballistic perforation characteristic of the target with different parametric variations. The influence of projectile nose shapes, plate thickness and incidence velocity on the variation of residual velocity, ballistic limit, contact force-time histories, energy absorption, damage pattern and damage area in the composite target have been studied. The material characterization of GFRP composite is carried out as required for the progressive damage analysis of composite. The numerical results from the present FE model in terms of residual velocity, absorbed energy, damage pattern and damage area are having close agreement with the results from the experimental impact tests.

• Steel and Composite Structures
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• 제23권2호
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• pp.153-160
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• 2017

It is extremely important to be aware of the ballistic performances of engineering materials in order to be able to choose the lightest armor providing full ballistic protection in civil and military applications. Therefore, ballistic tests are an important part of armor design process. In this study, ballistic performance of plates made of carbon steel and cold worked tool steel against 7.62 mm AP (armor-piercing) bullets was examined experimentally and numerically in accordance with NIJ standards. Samples in different sizes were prepared to demonstrate the effect of target thickness on ballistic performance. Some of these samples were coated with titanium nitride using physical vapor deposition (PVD) method. After examining all successful and unsuccessful samples at macro and micro levels, factors affecting ballistic performance were determined. Explicit non-linear analyses were made using Ls-Dyna software in order to confirm physical ballistic test results. It was observed that the ballistic features of steel plates used in simulations comply with actual physical test results.

• 한국군사과학기술학회지
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• 제19권6호
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• pp.712-720
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• 2016

The purpose of this study was to inspect ballistic match of copper bullet at 4 points by analyzing vertical deviation about shot group of the 5.56 mm common bullets and copper bullets. The 5.56 mm bullet with new copper core material was developed for mitigation of environmental pollution and harmfulness to human body. The results of this study are as follows; using the regression analysis, estimated reference value of ballistic match were 51.6 mm, 64.9 mm, 87.3 mm and 99.6 mm at 25 m, 100 m, 200 m and 250 m range respectively. When analyzing the shooting test data, alternative hypothesis(The vertical deviations are less than the reference value) was adopted as the result of analyzing data using t-test. And the values of data through tool(PRODAS) and standard trajectory equation meet requirements of estimated ballistic match respectively. In conclusion, the level of ballistic match of 5.56 mm copper bullets meets the estimated reference level through regression analysis at 4 points.

• 한국군사과학기술학회지
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• 제18권2호
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• pp.173-180
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• 2015

North Korea has developed ballistic missiles over the past 30 years. It is believed that they have a variety of ballistic missiles more than 1,000. Because these ballistic missiles threaten South Korea directly, accurate analysis of them is essential. Flight trajectories of the ballistic missiles are generally changed by means of adjusting payload weight, Isp, flight path angle, and cut-off time. The flight path angle is widely used to control the missile range. However it is difficult to predict the missile trajectory exactly in real operational environment because the missile could be launched according to its intention and purpose. This work analyzed the 1,000 km range MRBM's trajectory characteristics from adjusting flight path angle which is depressed as well as lofted method. The analysis of missile trajectory characteristics is based on the simulation of the missile trajectory model developed by KNDU research team.

• International journal of advanced smart convergence
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• 제12권2호
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• pp.117-126
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• 2023

To improve the overall performance and realism of your game, it is important to calculate the trajectory of a projectile accurately and quickly. One way to increase realism is to use a ballistic model that takes into account factors such as air resistance, density, and wind when calculating a projectile's trajectory. However, the more these factors are taken into account, the more computationally time-consuming and expensive it becomes, creating a trade-off between overall performance and efficiency. Therefore, we present an optimal solution to find a balance between ballistic model accuracy and computation time. We perform ballistic calculations using numerical methods such as Euler, Velocity Verlet, RK2, RK4, and Akima interpolation, and measure and compare the computation time, memory usage (RSS, Resident Set Size), and accuracy of each method. We show developers how to implement more accurate and efficient ballistic models and help them choose the right computational method for their numerical applications.

• 한국항행학회논문지
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• 제20권2호
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• pp.134-140
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• 2016

본 연구는 항력을 고려한 탄도미사일의 비행궤적 특성에 대한 해석이다. 탄도미사일은 대부분 대기권 밖에서 초고속으로 비행하고 RCS가 작기 때문에 요격이 어렵다. 특히 부스트 및 종말단계에서는 급격한 항력의 변화에 따라 속도의 변화가 매우 커진다. 따라서 성공적인 탄도미사일 방어체계를 구축하기 위해서는 탄도미사일의 비행궤적 해석 시 항력 특성을 반드시 고려해야 한다. 이러한 관점에서 본 연구는 항력에 대한 특성을 분석하고, 이를 고려하여 스커드 B, C 및 노동미사일의 비행궤적 특성을 도출하였다. 탄도미사일의 비행궤적 모델은 지구 자전에 의한 코리올리힘과 원심력을 반영하였으며, 탄도미사일의 제원은 공개된 자료를 활용하였다.

• 한국시뮬레이션학회논문지
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• 제32권3호
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• pp.55-66
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• 2023

최근 해군 함정은 다양한 최첨단 장비와 ICT 기술이 탑재되어 다종의 임무를 수행할 수 있도록 개발되고 있다. 우리나라 해군 함정의 주요 임무 중 하나는 급증하고 있는 탄도탄의 위협으로부터 아군의 주요 유닛과 지역을 방어하는 대탄도탄전이다. 대탄도탄전의 경우 탐지에서 요격까지 이루어지는 과정이 복잡한 반면 실패에 대한 피해가 크기 때문에, 대탄도탄전을 효과적으로 수행하기 위한 많은 준비가 필요하다. 본 논문에서는 미래 해군 함정에 탑재될 전투체계 및 장비를 활용한 대탄도 탄전 시뮬레이션 모델을 제안한다. 특히, 대탄도탄전에 필요한 특성을 반영하여 향후 효과도 분석에 활용될 수 있는 시뮬레이션 모델을 제안하고자 한다. 이를 위하여, 시뮬레이션 모델 개발에 DEVS 형식론을 적용하여 모듈러하고 계층적인 모델을 개발하였으며, 다양한 대탄도탄전 상황을 효율적으로 표현할 수 있게 하였다. 제시된 사례 연구 결과에서는 함정의 탐지 체계의 성능 및 의사 결정으로 발생할 수 있는 대탄도탄전의 문제 상황을 시뮬레이션 내용과 그 의미를 설명하였다. 향후 본 연구의 결과가 함정의 대탄도탄전 효과도 분석은 물론 함정의 대탄도탄전의 효과적인 수행을 위한 최적의 전투자원 배치 및 제원 그리고 운용 전술 등을 개발하는데 활용되기를 기대한다.