• Title/Summary/Keyword: panel test

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A Study on the development and application of air-passing soundproofing wall (통풍형 방음벽 개발 및 적용에 관한 연구)

  • Yoon, Je-Won;Kim, Young-Chan;Kim, Keum-Mo;Jang, Kang-Seok;Ku, Bon-Sung;Eom, Joo-Yong
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2011.10a
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    • pp.658-663
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    • 2011
  • The purpose of this study is to develop an air-passing soundproofing panel with more improved structure to reduce the $CO_2$ emission and installation cost. To reduce the emission of $CO_2$ ; it is suggested to choose low $CO_2$ emission material relative to the aluminum and to reduce the materials by developing a specially designed air-passing soundproofing panel structure. First of all, we performed the flow analysis to predict the wind pressure according to the open angle of the air-passing soundproofing panel and the noise level analysis at the receiver point. To verify the simulation, a prototype of the soundproofing panel was made. The flow test in the wind tunnel and load test were performed. The economic evaluation for the installation of the air-passing soundproofing panel was performed and specifications of the installation was prepared. As the results of this research, it was verified that the wind load was reduced about 40% to that of the conventional one at 25m/s wind speed in the wind tunnel test. By applying the 4m span soundproofing wall with air-passing soundproofing panel and under the cost of 250 thousand $won/m^2$ instead of the conventional 2m span panel, the installation cost will always be lowered than the conventional one in the combination of (60:40~50:50) conventional to air-passing soundproofing panel from the economic evaluation. The 20% reduction of $CO_2$ was found by changing the 50% of aluminum soundproof panel to air-passing soundproofing panel.

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The Development of Decal Panel for Night Vision Imaging System of Aircraft (항공기 야시조명계통 데칼패널 개발)

  • 권종광
    • Journal of the Korea Institute of Military Science and Technology
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    • v.6 no.2
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    • pp.35-44
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    • 2003
  • A Decal Panel is developed for the Night Vision Imaging System of XKO-1 aircraft. The Decal Panel is a kind of lighting system kits and is installed on each system switch box in crewstation. The Decal Panel consists of upper panel made of polycarbonate and lower panel which is a printed circuit board. This paper includes the design, manufacture, test and evaluation of Decal Panel in addition to items and conditions of environmental test. Besides it is confirmed the Key for manufacturing a decal panel, is depth of paint, dry time period and frequency, and diffusion material for spreading of light.

Effect of the Curved Automotive Panels for NVH Performance Improvement (NVH 성능향상을 위한 복곡 자동차 패널의 효과)

  • Yoo, Hee;Lee, Young-Woo;Choi, Byoung-Ki;Kim, Jong-Kuk;Yum, Young-Jin
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.33 no.7
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    • pp.700-705
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    • 2009
  • In order to enhance the dynamic stiffness of automotive panel, effect of bead and curved surface was investigated. Modal test was performed for principle specimens which have various kinds of beads, holes and curved surfaces. Test was also performed for conventional dash panel assembly and rear floor panel assembly and curved shaped ones. Results showed that curved shape increased the natural frequency of automotive panel more effectively than the bead. Finite element analysis was also performed and yielded good match with the test results.

Color Factor Analysis of in Farnsworth Test Panel D-15 (색각 검사용 Farnsworth Test Panel D-15의 칼라 인자 연구)

  • Kim, Yong-Geun;Park, Sang-An
    • Journal of Korean Ophthalmic Optics Society
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    • v.5 no.1
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    • pp.31-37
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    • 2000
  • In order to color analyze of in Farnsworth Test Panel D-15 using a Protan, Deutan and Tritan test, we introduced the CIE system so that measured the reflectance light spectrum intensity in the 380~780 nm wavelength regions. The color difference of Panel D-15 was depended on the intensity of reflectance ratio in the 400~450 nm, 500~600 nm and more than 650 nm wavelength regions. From the reflectance spectra, we obtained the tristimulus X, Y, Z values, the $L^*a^*b^*$ and $L^*ab$ values of the 3-Dimension CIELAB system in a complement plane and light-darkness axis, the $U^*V^*$ values and the x, y values of chromaticity coordinates.

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Experimental Studies on PSC Airpit-Slab with Fire Resistance Panel under Static and Dynamic Loads (내화패널이 부착된 프리캐스트 PSC 풍도슬래브의 정적/동적하중에 관한 실험연구)

  • Kim, Tae Kyun;Bae, Jeong;Choi, Heon;Min, In Gi
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.32 no.4A
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    • pp.245-253
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    • 2012
  • In the longway tunnel and underground traffic road, the structure of transverse ventilation system is constructed by the airpit slab. In this study, the full scale specimens of the PSC airpit slab that attached fire resistance panel are performed the static and dynamic loading tests for evaluation of bending capacity. The first of all, it confirmed the evaluations about the fundamental efficiency of the fire resistance panel and PSC slab by the 3-point bending test and pull-off test. The tests are performed for evaluation of the bending resistance under ultimate static load and the bonded capacity under dynamic fatigue load. A fatigue test is performed for an investigation of the effect on wind pressure that is developed by transit of traffic. The damage or debonding on surface between fire resistance panel and PSC slab was not developed in dynamic fatigue load test, also the behavior of the specimens is very stable and the debonding of the fire resistance panel attached at the bottom surface of PSC slab was not developed in static load test, too. Therefore, the crack or debonding of the fire resistance panel will be not developed by external loads during the construction or completion of the precast fire resistance system.

Toughness Evaluation of Steel Fiber Reinforced Concrete to Spiecimen Types (시편형상에 따른 강섬유보강 콘크리트의 휨인성평가방법)

  • 류종현;김진철;한승환;이상돈;안태송
    • Proceedings of the Korea Concrete Institute Conference
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    • 2001.11a
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    • pp.341-344
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    • 2001
  • Fiber reinforced shotcrete(FRS) is widely used in tunnel linings, which strengthen the rock surface and reduce the loosening of the rock strata. The advantages of FRS in tunnel linings are the unsusceptibility to crack, the benefit of shotcrete strength, and the superiority of toughness. In this study, the several evaluation methods of FRS toughness were investgated experimentally, which included the ASTM beam test, EFNARC square panel test and RTA round panel test. Especially, it was examined that the round panel test could fulfill the toughness evaluation of FRS.

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Parallel Testing Circuits with Versatile Data Patterns for SOP Image SRAM Buffer (SOP Image SRAM Buffer용 다양한 데이터 패턴 병렬 테스트 회로)

  • Jeong, Kyu-Ho;You, Jae-Hee
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.46 no.9
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    • pp.14-24
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    • 2009
  • Memory cell array and peripheral circuits are designed for system on panel style frame buffer. Moreover, a parallel test methodology to test multiple blocks of memory cells is proposed to overcome low yield of system on panel processing technologies. It is capable of faster fault detection compared to conventional memory tests and also applicable to the tests of various embedded memories and conventional SRAMs. The various patterns of conventional test vectors can be used to enhance fault coverage. The proposed testing method is also applicable to hierarchical bit line and divided word line, one of design trends of recent memory architectures.

Model Validation for the CBS Ku-Band Transponder Panel Using Launch Environmental Test (발사환경시험을 이용한 통신방송위성 Ku대역 중계기 패널의 모델 검증)

  • Seo Hyun Suk;Choi Jang Sub;Park Jong Heung;Woo Hyung Je
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.29 no.3 s.234
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    • pp.387-394
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    • 2005
  • Accurate predictions and simulations of the behavior of space structures based on analytical models become more important. In order to perform analysis to support the design of Ku-band transponder panel for the Communications and Broadcasting Satellite(CBS), mathematical models of the panel were generated in the form of finite element models. Test verification of these models is required before the transponder panel can be certified for launch environments. A modal identification was performed to obtain modal parameters which can be compared with the test results using correlation techniques. This paper approaches the sensor placement from the standpoint of the structural dynamicist who uses the modal parameter obtained during launch environmental test. The models were validated by performing a test-analysis correlation and updating analysis. It was proved that the Ku-band transponder panel satisfies the environmental test requirements.

Flexural Behavior Evaluation of Two Types Fiber Reinforced Shotcrete using Round Panel Test (원형패널 시험을 활용한 두 종류 섬유 보강 숏크리트의 휨거동 평가)

  • Jeon, Chanki;Jeon, Joongkyu
    • Journal of the Society of Disaster Information
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    • v.11 no.4
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    • pp.607-614
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    • 2015
  • This study evaluated the flexural performance of steel and PP fiber reinfroced shotcrete using round panel test according to ASTM that can consider the actual stress of fiber reinforced shotcrete in tunnel and under ground structures. The results of round panel test are converted to the square panel test results according to the EFNARC. The energy absorptions of each fiber reinforced shotcrete were classified according to the EFNARC toughness classification. Test results show that the PP fiber reinforced shotcrete has better flexural performance compared with the steel fiber reinforced shotcrete.

스스로 알아보는 안내해설판의 교육적 효과

  • 김성일;황명현
    • Hwankyungkyoyuk
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    • v.10 no.2
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    • pp.213-228
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    • 1997
  • This study was planned to test the educational effects of self-guiding environmental interpretation panel. For purpose of the study, self-guiding interpretation panel was set up along the trail of green shower area of Kwang-Reung Arboretum in 1995,and the environmental behavior related variables such as attitude, locus of control, personal responsibility, general knowledge, and intention to act were closen based on Hines and his colleagues' Responsible Environmental Behavior model(1987). The pre-test/post-test non-random control group design was introduced fo test the effects of panel. ANCOVA was used to test the differences between experimental and control group because of the need to consider the effects of other variable such as socio-economic variables on the changes of environmental behavior related variables. Among 5 environmental behavior related variables, the changes of attitude and knowledge were significantly different between experimental group and control group, and the experimental group's direction of change was more favorable for environment. It is concluded that the educational effects of self-guiding interpretation panel were partially accepted. Several recommendations and restrictions of the study are presented.

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