• Title/Summary/Keyword: filed test

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The Specified Minimum Yield Stress of SM570TMC in Composite Columns (SM570TMC강의 매입형 합성기둥 적용시 설계기준 항복강도에 관한 연구)

  • Lee, Myung Jae;Oh, Young Suk;Lee, Eun Teak
    • Journal of Korean Society of Steel Construction
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    • v.20 no.1
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    • pp.195-203
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    • 2008
  • This paper aims to evaluate the yield stress of SM570TMC concrete-filed H-shape steel columns subjected to axial force. These columns were evaluated and compared using quasi-static tests. The displacements and the axial loads column specimens were measured during the tests, and test results showed that the yield stress of concrete-filed H-shape steel columns subjected to axial load could be predicted using the previously proposed yield stress of steel columns.

Ride Performance Evaluation of a Heavy Truck Semi-active Cabin Air Suspension System (대형 트럭 반능동형 캐빈 공기 현가시스템의 승차감 성능 평가 연구)

  • Lee, Ji-Sun;Choi, Gyoo-Jae;Lee, Kwang-Heon
    • Transactions of the Korean Society of Automotive Engineers
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    • v.16 no.5
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    • pp.77-83
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    • 2008
  • Semi-active cabin air suspension system improves driver's comfort by controlling the damping characteristics in accordance with driving situation. For the driver's comfort evaluation, test procedure has the two methodologies which are filed test and lab test. A field test method has a drawback. It requires a lot of time and money on repetitive test, due to the sensitivity of field test. On the other hand, the test with six axes simulation table at laboratory can obtain the repeatability of test, better than the field test method. In this paper, the procedures of ride performance test and control logic tuning with the table are presented. Drive files of the table can be represented with the almost same input condition as field test data. According to the result from the comparative test using six axes simulation table between passive and semi-active system by making ECU logic tuning, the RMS acceleration of semi-active cabin air suspension system was reduced by 29.6% compared with passive system.

Design and Construction of Test Field for Low Voltage Under Cable Fault Location Detection (저압 지중케이블 고장 위치 검출 실증 시험장 설계 및 구축)

  • Oh, Hun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.10
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    • pp.6666-6672
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    • 2015
  • Various reflectometry methods to locate power cable fault have been studied. But, most related studies has been verifying by simulation and laboratory test and study in conditions similar with real cable fault filed was not performed due to the absence of cable fault test field. Therefore, this paper design and construct test field for the standardized performance test and the operating education of cable fault location equipments. In the constructed test, open, short, half open and poor contact fault at 100m, 200m location of cable was produced and 1km cable role was installed for maximum distance measurement test. The test field will be used in the development and standardization of cable fault location technology, and te performance evaluation and certificate test of the related equipments.

Impact of a shock wave on a structure strengthened by rigid polyurethane foam

  • Mazek, Sherif A.;Mostafa, Ashraf A.
    • Structural Engineering and Mechanics
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    • v.48 no.4
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    • pp.569-585
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    • 2013
  • The use of the rigid polyurethane foam (RPF) to strengthen sandwich structures against blast terror has great interests from engineering experts in structural retrofitting. The aim of this study is to use the RPF to strengthen sandwich steel structure under blast load. The sandwich steel structure is assembled to study the RPF as structural retrofitting. The filed blast test is conducted. The finite element analysis (FEA) is also used to model the sandwich steel structure under shock wave. The sandwich steel structure performance is studied based on detonating different TNT explosive charges. There is a good agreement between the results obtained by both the field blast test and the numerical model. The RPF improves the sandwich steel structure performance under the blast wave propagation.

Numerical Analysis on the Flow Vortex in a Multi Pump Intake using a Pump Sump Model (다중 펌프 흡수정에서 발생하는 Vortex 수치 해석에 관한 연구)

  • Park, No-Suk;Kim, Seong-Su;Hyun, Sang-Rak;Park, Jong-Ho;Ahn, Young-Seog
    • Journal of Korean Society of Water and Wastewater
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    • v.24 no.2
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    • pp.211-217
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    • 2010
  • In order to suggest the methodology for achieving anti-vortex within multi pump intake well, the field test and CFD(Computational Fluid Dynamics) simulation were conducted. The filed test were carried out for domestic W_multi pump intake well according to usual operation condition through the naked observation. From the results, operating #4, #5, #8 and 9# pumps, the vortex and swirl occurred above #4 and #9 intake pipe within two wells. For qualitative analysis, a commercial CFD code, using sump model, was used to predict the vortex generation within the selected pump intake facility accurately. The analysed results by CFD show that the vortex structure and location are in accordance with the results of the field test.

A Pilot Study of Moving Loads Simulation Techniques (이동하중 재현 시험 기법에 대한 선행 연구)

  • Kim, Hyun-Min;KIm, Sung-Il
    • Proceedings of the KSR Conference
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    • 2010.06a
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    • pp.1492-1499
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    • 2010
  • This paper is intended as an development of moving load simulation techniques. The concern with dynamic problem of railway bridge caused by the moving train loads has been growing. Over the past few years, several studies have been made on dynamic stability of railway bridge analytically. But very few attempts have been made at experimental research. From the dynamic stability view point, the moving train loads simulation test is revolutionary idea. It can be replace restrictive filed test with new laboratory test. This study investigates minimum specifications of hardware and basic parameters. it is used 39m girder and 4 actuators for experimental verification.

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A Study on Evaluation Method for Older Drivers Driving Ability Using Driving Course Test Site (기능시험장을 활용한 고령운전자 운전능력 평가방법 개발 연구)

  • Kim, Daewon;Hwang, Sooncheon;Lee, Dongmin
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.21 no.1
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    • pp.141-158
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    • 2022
  • Currently, there are some aptitude test systems for older drivers in Korea. However, there are no methods and systems to evaluate the real driving ability for older drivers based on filed driving test. This study was conducted to investigate the availability to use the driving course test used for driving license for identifying difference in driving ability of older and non-older drivers. For the research purpose, filed experiments were conducted using the real driving course test site and evaluation times used in the field. In particular, driving behavior data that obtained from the experiments for two driver groups, older and non-older drivers, were analyzed and compared. From several statistical analyses of driving ability and vision and cognitive ability, it was found that the currently used driving course test site and evaluation times were not appropriated to identify driving ability deficiency of older drivers. To solve the problem, this study developed five evaluation items to identify driving ability deficiency of older drivers using the currently used driving course test site. It was also found that the developed five evaluation items have statistically significant correlation with vision and cognitive ability.

Characterization of Low-temperature Conductive Films Bonded PV Modules and Its Field Test (저온 전도성 필름으로 본딩된 태양광 모듈의 특성 평가 및 실증 연구)

  • Baek, Su-Wung;Choi, Kwang-Il;Lee, Suk-Ho;Cheon, Chan-Hyuk;Hong, Seung-Min;Lee, Kil-Song;Shin, Hyun-Woo;Yang, Yeon-Won;Lim, Cheol-Hyun
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.27 no.3
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    • pp.189-194
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    • 2014
  • In this paper, PV modules using a low-temperature conductive film(LT-CF) as a bonding material between a cell and a solder free ribbon were produced and chracterized, which is more environmental-friendly, cost effective and high efficient. Mainly, filed electrical performance of PV modules using three different types of bonding material; a convetional solder ribbon(SR), a LT-CF and a light-capturing Ribbon(LCR) were compared to comfirm the feasibility of LT-CF as a bonding material. The filed test were conducted for 3 months and results were discussed in terms of amount of output energy production and efficiency.

Optimization for Component Noise Validation Test by Evaluation of Noise Control Factors for Suspension (현가장치 소음 발생인자 평가를 통한 부품소음 검증시험 최적화)

  • Son, Myungkoon;Lee, Taeyong;Lee, Sangbok;Lee, Seul
    • Transactions of the Korean Society of Automotive Engineers
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    • v.25 no.3
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    • pp.344-349
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    • 2017
  • Suspension noise from under a passenger car is one of the important factors that impact the perceptual quality for drivers. However, it is difficult to validate this by component level testing in the early stage of development, because suspension noise caused by interaction of the related parts has been found at saleable vehicles late during development or at the manufacturing stage, when many customers have already filed for claims. This study proposed a validation testing under research by the DFSS process that enables reproduction of vehicle level noise by component level testing using a shock absorber with the related parts, such as urethane bumper and top mount. This study also developed a compromised test matrix while analyzing the noise factors through experimental design and analysis of variance to determine what factors can affect noise. Based on this study, we expect that the vehicle level and customer claim can be validated during initial development timing by a more reliable component noise validation test.

Yield Mapping of a Small Sized Paddy Field (소구획 경지에서의 벼 수확량 지도 작성)

  • 정선옥;박원규;장영창;이동현;박우풍
    • Journal of Biosystems Engineering
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    • v.24 no.2
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    • pp.135-144
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    • 1999
  • An yield monitoring system plays a key role in precision farming. An yield monitoring system and a DGPS were implemented to a widely used domestic combine for yield mapping of a small sized paddy field, and yield mapping algorithms were investigated in this study. The yield variation in the 0.1ha rice paddy field was measured by installing a yield flow sensor and a grain moisture sensor at the end of the clean grain elevator discharging grains into a grain tank. Yield map of the test filed was drawn in a point map and a linear interpolated map based on the result of the field test. The size of a unit yield grid in yield mapping was determined based on the combine traveling speed, effective harvesting width and data storing period. It was possible to construct the yield map of a small sized paddy field.

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