• Title/Summary/Keyword: Fire test

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An Analysis on Confidence Level of Domestic Precision Guided Missile(PGM) based on Live-fire Test Results (국내 정밀유도무기 사격시험 결과 기반 신뢰수준 분석)

  • Seo, Bo-Gil;Yoon, Young Ho;Kim, Bo Ram
    • Journal of Korean Society for Quality Management
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    • v.48 no.1
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    • pp.215-225
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    • 2020
  • Purpose: The purpose of this study was to show current states of domestic Precision Guided Missile(PGM) by analyzing Live-fire test results using general methods to get the Confidence Levels. Methods: Live-fire test results were used to get Confidence Levels of PGM. The Confidence Levels were derived by two general methods. The first method was Binomial distribution and second was convergence of Hypergeometric distribution and Bayes' rule. Results: The results of this study are as follows; The more Live-fire tests of PGM are performed, the higher Confidence Level of PGM will be estimated. And the number of Live-fire tests are related to a unit price of PGM. This results means that the increase of live-fire test, which is useful data for preparation and evaluation of Development Tests / Operation Tests for PGMs, is only way to enhance the Confidence Levels of each PGMs. Conclusion: This study shows the relationship between the Live-fire tests and Confidence Levels of PGMs and it will be used on Live-fire Test & Evaluation of PGMs for reference.

내화피복 강재의 내화성능 평가 예측에 관한 연구

  • Seong, Si-Chang
    • Fire Protection Technology
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    • s.17
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    • pp.5-9
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    • 1994
  • With a rapid development of economy, more high-rise buildings are being constructed in large cities than before. As a result steel members such as beams, columns make a great role of the building construction, and the need of them to be protected to have enough fire resistance is in-creasing . But conducting a real fire test to all the members is almost impossible. So prior to do conduct a real fire test of the protected steel members, evaluating the fire resistant rating of them by means of their specific properties might be economical things. This study is aimed to introduce the fire resistant rating of protected steel members without a real fire test through the related studies and data.

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Fire test for interior material satisfied with the guide for the safety of rail vehicle (철도차량 안전기준을 만족하는 철도차량 내장재의 화재성능 시험)

  • Park, Won-Hee;Lee, Duck-Hee;Jung, Woo-Sung
    • Proceedings of the KSME Conference
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    • 2008.11b
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    • pp.2149-2153
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    • 2008
  • A large-scale fire test was done for interior materials from a vehicle installed within a fire test room. The interior materials are satisfied with the Korean guide for the safety of rail vehicle. The guide has taken effect since December 2004 in Korea. Ignition source (gas burner) was increased in several controlled steps. The objectives of this test are to assess the fire performance in terms of ignition and flame spread on interior lining materials and to provide data on an enclosure fires involving train interior materials that grow to flashover. This data will be used to develop and calibrate an Fire Dynamics Simulator (FDS) model for fire growth on the interior vehicle.

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Hot-Fire Test Facility for Medium-scale Monopropellant Thruster Evaluation (중대형 단일추진제 추력기 성능평가를 위한 진공연소시험설비 개발)

  • Kim, In-Tae;Lee, Jun-Hui;Lee, Jae-Won;Lee, Won-Bok;Kim, Su-Kyum;Chae, Jong-Won;Yu, Myoung-Jong
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2011.11a
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    • pp.336-339
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    • 2011
  • Hot-fire test facility is one of the most important infrastructure for thruster development and evaluation. During the past three years, Korea Aerospace Research Institute (KARI) and Hanwha Corporation have successfully performed the construction of hot-fire test facility for medium-scale monopellant thruster to the maximum 200N thrust level. In general, thruster hot-firing test should be performed in vacuum conditions to simulate space environment. The hot-fire test facility is divided into three subsystems, vacuum system, propellant supply system and data measurement & control system. The goal of this facility is to extend the capability from small thruster for satellite mission to medium-scale thruster for launch vehicle and lunar mission. In this paper, the progress and overview for thruster hot-fire test facility was introduced and test results were also presented.

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An Experimental Study on Piping Feasibility of PE Compound Pipe for Fire Protection Service (PE 이종강관의 소방용 배관 적용성에 관한 실험적 연구)

  • Park, Jeong-Hwa;Oh, Cheon-Young;Kwark, Ji-Heon;Son, Bong-Sei
    • Fire Science and Engineering
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    • v.30 no.3
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    • pp.55-61
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    • 2016
  • In this study, to determine whether it is possible to apply Polyethylene (PE) compound pipe, which was developed to solve the problem caused by the corrosion of the fire protection piping currently in usein water based fire extinguishing systems, we performed an actual mockup fire test. Since no test standard was available related to the developed compound pipe, we compared and analyzed domestic and international technical materials and test standards and selected suitable fire test standards to evaluate the performance of the PE compound pipe. we applied two fire test standards to the PE compound pipe, viz. those for CPVC and metallic pipes, and conducted a total of 6 experiments to evaluate its performance. According to the results of the first and second fire tests based on the test standard for the CPVC pipe, neither the fitting nor the piping was damaged or deformed and no leakage was observed in the pressure test, which was performed for 5 minutes. For the fire test based on the metallic pipe test standard, a total of 4 experiments were conducted. The first two experiments were conducted to simulate the wet piping system. In the results of this fire test, neither leakage nor rupture was observed from the PE compound pipe and no damage was caused, such as the secession of the PE material. However, in the next two experiments, which simulated the dry system, the PE compound pipe suffered damage and rupture, including deformation before the fire fighting water was discharged. Therefore, we found that the piping performance of the PE compound pipe did not undergo any deterioration, including fusion, deformation, or damage, in the wet piping system simulated fire test.

A Study on Fire Alarm Test of IoT Multi-Fire Detector combined Smoke/CO and Smoke/Temperature Sensors (연기/CO 및 연기/열 복합형 IoT 멀티 화재 감지기의 화재감지실험 연구)

  • Son, Geun­Sik;So, Soo­Hyun
    • Journal of the Society of Disaster Information
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    • v.17 no.2
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    • pp.236-244
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    • 2021
  • Purpose: The purpose of this study is to develop IoT multi-fire detectors combined smoke/carbon monoxide/heat and wireless IoT communication and to confirm the detect performance by smoke generator fire test and cotton wicks fire test. Method: The IoT multi-fire detector combined smoke and CO and combined smoke and heat were experimented the detect performance by smoke generator test and fire test of cotton wicks. And the case of fire alarm was checked. Result: The IoT multi-fire detector combined smoke and CO rung the alarm at the fire test of cotton wicks, did not ring the alarm at the smoke generator test. In comparison, the IoT multi-fire detector combined smoke and heat did not ring the alarm both at the smoke generator test and the fire test of cotton wicks. Conclusion: The IoT multi-fire detector combined smoke and CO detected the only smoke including the carbon monoxide and the IoT multi-fire detector combined smoke and heat did not ring the alarm for lack of heat. As a result, when the developed IoT multi-fire detector was detected the signal more than the set point, the fire alarm was sounded through cotton wicks fire test and smoke generator.

Review on Fire Test Section of Fire Protection Coating for Steel Beam (강재보용 내화피복의 내화성능 평가단면에 대한 고찰)

  • Jeon, Soo-Min;Kim, Jae-Jun
    • Fire Science and Engineering
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    • v.30 no.2
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    • pp.49-55
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    • 2016
  • It is necessary to obtain a fire resistance certification in order to use Fire Protection Coating in Korea. According to the fire test standards, columns have four heating sides and beams have three. In comparison with columns which are heated four sides equally, beams have three exposed sides and one unexposed up side. So the question arises as to there were the differences between the temperature of up side and others of beams in fire test. The purpose of this study is to consider the positions of thermocouples for beams through a comparative analysis of the temperature data obtained from fire certification tests.