• Title, Summary, Keyword: Performance test load

Search Result 1,689, Processing Time 0.044 seconds

Static load test of the bogie and vibration performance test, dynamic characteristics analysis of the bulk cement car (벌크시멘트화차의 대차 하중시험과 진동성능시험 및 동특성 해석 연구)

  • 홍재성;함영삼;백영남
    • Journal of the Korean Society for Railway
    • /
    • v.6 no.3
    • /
    • pp.186-193
    • /
    • 2003
  • The object of this study is to ensure the stability of bulk cement cars conducting vibration performance test, dynamic characteristic analysis and static load test of bogie frame. In case of static load test, bogie static load test facility was used. In case of dynamic characteristic analysis, Vampire Software was used. In case of vibration performance test, real bulk cement cars were used in kyeung-bu line. In the results of static load test of bogie frame for bulk cement car, all structures satisfied allowable stress criteria of materials. The vibration performance test and dynamic characteristic analysis results satisfied allowable standards.

Experimental Study on the Load Carrying Performance and Driving Torque of Gas Foil Thrust Bearings (가스 포일 스러스트 베어링의 하중지지 성능 및 구동 토크에 관한 실험적 연구)

  • Kim, Tae Ho;Lee, Tae Won;Park, Moon Sung;Park, Jungmin;Kim, Jinsung;Jeong, Jinhee
    • Tribology and Lubricants
    • /
    • v.31 no.4
    • /
    • pp.141-147
    • /
    • 2015
  • Gas foil thrust bearings (GFTBs) have attractive advantages over rolling element bearings and oil film thrust bearings, such as oil-free operation, high speed stability, and high-temperature operation. However, GFTBs have lower load carrying capacity than the other two types of bearings owing to the inherent low gas viscosity. The load carrying capacity of GFTBs depends mainly on the compliance of the foil structure and the formed hydrodynamic wedge, where the gas pressure field is generated between the top foil and the thrust runner. The load carrying capacity of the GFTBs is very important for the suitable design of oil-free turbomachinery with high performance. The aim of the present study is to identify the characteristics of the load carrying performance of GFTBs. A new test rig for the experimental measurements is designed to provide static loads up to 800 N using a pneumatic cylinder. The maximum operating speed of the driving motor is 30,000 rpm. A series of experimental tests—lift-off test, static load performance test, and maximum load capacity test—estimate the performance of a six-pad GFTB, in terms of the static load, driving torque, and temperature. The maximum load capacity is determined by increasing the static load until the driving torque rises suddenly with a sharp peak. The test results show that the torque and temperature increase linearly with the static load. The estimated maximum load capacity per unit area is approximately 80.5 kPa at a rotor speed of 25,000 rpm. The test results can be used as a design guideline for GFTBs for realizing oil-free turbomachinery.

A study on structural integrity and dynamic characteristic of inertial load test equipment for performance test of railway vehicle propulsion control system (철도차량 추진제어장치 성능시험을 위한 관성부하 시험설비의 구조안전성 및 동특성 평가 연구)

  • Jang, Hyung-Jin;Shin, Kwang-Bok;Lee, Sang-Hoon;Lee, Dae-Bong
    • Proceedings of the KSR Conference
    • /
    • /
    • pp.1389-1394
    • /
    • 2010
  • This paper describes the evaluation of structural integrity and dynamic characteristic of inertial load test equipments for performance test of railway vehicle propulsion control system. The propulsion control system of railway vehicle has to be confirmed of safety and reliability prior to it's application. Therefore, inertial load test equipments were designed through theoretical equation for performance test of propulsion control system. The structural analysis of inertial load test equipments was conducted using Ansys v11.0 and it's dynamic characteristic was evaluated the designed using Adams. The results showed that the structural integrity of inertial load test equipment was satisfied with a safety factor of 10.2. Also, the structural stability was proved by maximum dynamic displacement of 0.82mm.

  • PDF

Vibration Performance test and static load test of body flat freight car (평판화차의 차체 정하중시험 및 진동성능시험)

  • Hong Jai-Sung;Ham Young-Sam;Kim Gil-Dong;Han Suk-Youn;Cha Ji-Bum
    • Proceedings of the KSR Conference
    • /
    • /
    • pp.700-705
    • /
    • 2003
  • The object of this study is to ensure the stability of flat freight cars using vibration performance test and static load test of body structures. We examined the flat car though static load test and dynamic characteristics analysis related traveling stability and vibration performance. In the results of static load test of body structures for flat car, all structures satisfied allowable stress of materials. The vibration performance test was satisfied with allowable standards. Although flat car exceed speed a little at some speed interval, it was estimated that the cause was not cars but rail.

  • PDF

Plant Minimum Stable Load (Pmin) Test for Ilijan CCPP

  • Kim, Si Moon;Yun, Wan No;Jang, Cheol Ho;Park, Se Ik
    • KEPCO Journal on Electric Power and Energy
    • /
    • v.2 no.1
    • /
    • pp.83-88
    • /
    • 2016
  • This paper describes the test results of plant minimum stable load (Pmin) for Ilijan Power Plant. The test was conducted on May 13 through 14, 2015 to investigate the plant operating and equipment condition in accordance with "Ilijan Plant Performance Test Procedure on Plant Minimum Stable Load" [1]. This paper also contains the assessment of the impact of Pmin to plant operating parameters and possible technical operating issues when operating at lower loads and to recommend the safe minimum load operation of Ilijan per block. In addition, this paper describes the performance calculation results of efficiency and heat rate depending on the load level.

Performance of cyclic loading for structural insulated panels in wall application

  • Nah, Hwan-Seon;Lee, Hyeon-Ju;Choi, Sung-Mo
    • Steel and Composite Structures
    • /
    • v.14 no.6
    • /
    • pp.587-604
    • /
    • 2013
  • There are few technical documents regulated structural performance and engineering criteria in domestic market for Structural insulated panels in Korea. This paper was focused to identify fundamental performance under monotonic loading and cyclic loading for SIPs in shear wall application. Load-displacement responses of total twelve test specimens were recorded based on shear stiffness, strength, ultimate load and displacement. Finally energy dissipation of each specimen was analyzed respectively. Monotonic test results showed that ultimate load was 44.3 kN, allowable shear load was 6.1 kN/m, shear stiffness was 1.2 MN/m, and ductility ratio was 3.6. Cyclic test was conducted by two kinds of specimens: single panel and double panels. Cyclic loading results, which were equivalent to monotonic loading results, showed that ultimate load was 45.4 kN, allowable shear load was 6.3 kN/m. Furthermore the accumulated energy dissipation capability for double panels was as 2.3 times as that for single panel. Based on results of structural performance test, it was recommended that the allowable shear load for panels should be 6.1 kN/m at least.

Performance Evaluation on Static Loading and Cyclic Loading for Structural Insulated Panels (구조용단열패널의 정적가력과 반복가력 성능 평가)

  • Nah, Hwan-Seon;Lee, Hyeon-Ju;Choi, Sung-Mo
    • Journal of the Korean Society for Advanced Composite Structures
    • /
    • v.4 no.1
    • /
    • pp.33-39
    • /
    • 2013
  • Structural insulated panels, structurally performed panels consisting of a plastic insulation bonded between two structural panel facings, are one of emerging products with a viewpoint of its energy and construction efficiencies. These components are applicable to fabricated wood structures. In Korea, there are few technical documents regulated structural performance and engineering criteria in domestic market. This study was conducted to identify fundamental performance of both monotonic load and quasi static cyclic load for SIPs in shear wall application. Static test results showed that maximum load was 44.3kN, allowable shear load was 6.1kN/m, shear stiffness was 1.23 M N/m, and ductility ratio was 3.6. Cyclic test was conducted by two kinds of specimens : single panel and double panels. Cyclic test results, which were equivalent to static test results, showed that maximum load was 45.42kN, allowable shear load was 6.3kN/m. Furthermore the accumulated energy dissipation capability for double panels was as 2.3 times as that for single panel. From performance of structural tests, it was recommended that the allowable shear load for panels was at least 6.1kN/m.

Experimental Performance Verification of Load Carrying Capacity Algorithm of Bridges using Ambient Vibration (상시진동을 이용한 교량 내하력 추정 알고리즘의 실험적 성능 검증)

  • Lee, Woo-Sang;Park, Ki-Tae;Han, Sung-Ho
    • Journal of the Korean Society of Safety
    • /
    • v.25 no.3
    • /
    • pp.83-90
    • /
    • 2010
  • In this study, it is conducted that the performance verification of the ambient load carrying capacity algorithm using long-term measurement systems of bridges. For this purpose, a steel-box type model bridge is fabricated and the public load carrying capacity of a steel-box model bridge is estimated by conducting the numerical analysis and load test. In addition, we compare the public load carrying capacity with the estimated result of a steel-box model bridge using the ambient load carrying capacity algorithm. By the assessment result, it is shown that the estimated ambient load carrying capacity is the difference of approximately 6.0 percentages as compared with the public load carrying capacity.

Seismic performance assessment of steel reinforced concrete members accounting for double pivot stiffness degradation

  • Juang, Jia-Lin;Hsu, Hsieh-Lung
    • Steel and Composite Structures
    • /
    • v.8 no.6
    • /
    • pp.441-455
    • /
    • 2008
  • This paper presents an effective hysteretic model for the prediction and evaluation of steel reinforced concrete member seismic performance. This model adopts the load-deformation relationship acquired from monotonic load tests and incorporates the double-pivot behavior of composite members subjected to cyclic loads. Deterioration in member stiffness was accounted in the analytical model. The composite member performance assessment control parameters were calibrated from the test results. Comparisons between the cyclic load test results and analytical model validated the proposed method's effectiveness.

Performance Monitoring and Load Analysis of Wind Turbine (풍력발전기의 성능 모니터링 및 하중분석)

  • Bae, Jae-Sung;Kim, Sung-One;Youn, Joung-Eun;Kyung, Nam-Ho
    • 유체기계공업학회:학술대회논문집
    • /
    • /
    • pp.385-389
    • /
    • 2004
  • Test facilities for the wind turbine performance monitoring and mechanical load measurements are installed in Vestas 100 kW wind turbine in Wollyong test site, Jeju island. The monitoring system consists of Garrad-Hassan T-MON system, telemetry system for blade load measurement, various sensors such as anemometer, wind vane, strain gauge, power meter, and etc. The experimental procedure for the measurement of wind turbine loads, such as edgewise(lead-lag) bending moment, flapwise bending moment, and tower base bending moment, has been established. Strain gauges are on-site calibrated against load cell prior to monitoring the wind turbine loads. Using the established monitoring system, the wind turbine is remotely monitored. From the measured load data, the load analysis has been performed to obtain the load power spectral density and the fatigue load spectra of the wind turbine.

  • PDF