• 넻빀寃깋
  • 븰젅룷듃
  • 끉臾
  • 湲곗뾽떊슜蹂닿퀬꽌
  • 痍⑥뾽옄猷
  • 뙆썙룷씤듃諛곌꼍
  • 꽌떇

끉臾 167嫄

Wear and rolling contact fatigue (RCF) defects are most important causes of rail damage, and often interaction competitive at present railway track. Head check is one of rolling contact fatigue (RCF) defects, and generally occurs in mild circular curves and transition curves that are set at both end
  • 럹씠吏 7럹씠吏
  • 媛寃 6,000썝
  • 諛쒗뻾씪 2019.03.01
  • 뙆씪醫낅쪟 븘겕濡쒕껙(pdf)
  • 諛쒗뻾湲곌 븳援泥좊룄븰쉶
  • Ying JIN, Fusayoshi AOKI, Makoto ISHIDA, Akira Namura
In this study, a noncontact laser ultrasonic system is proposed for rail defect detection. An Nd-Yag pulse laser is used for generation of ultrasonic waves, and the corresponding ultrasonic responses are measured by a laser Doppler vibrometer. For the detection of rail surface damages, the shape of
  • 럹씠吏 7럹씠吏
  • 媛寃 6,000썝
  • 諛쒗뻾씪 2019.03.01
  • 뙆씪醫낅쪟 븘겕濡쒕껙(pdf)
  • 諛쒗뻾湲곌 븳援鍮꾪뙆愿닿궗븰쉶
  • Nak-Hyeon Kim, Hoon Sohn, Soon-Woo Han
damage at an early stage. In order to diagnose the fatigue condition of the rail, which causes safety problems in the railway system, ultrasonic mixing was applied. Fatigue damage test specimens were fabricated using KR60 rail, which is used on most railway sites in Korea. For the mechanical propert
  • 럹씠吏 6럹씠吏
  • 媛寃 6,000썝
  • 諛쒗뻾씪 2019.01.17
  • 뙆씪醫낅쪟 븘겕濡쒕껙(pdf)
  • 諛쒗뻾湲곌 븳援鍮꾪뙆愿닿궗븰쉶
  • 씠옱꽑, 二쇳뙆, 議곗쑄샇, 꽍李쎌꽦
railway safety, it is very important to detect damages of rails at their early stage because any undetected damage in a rail can break the rail and cause a serious railway accident. In this paper, several NDT applicable to rail inspections are described. Major damage types in rails are discussed fir
  • 럹씠吏 16럹씠吏
  • 媛寃 6,000썝
  • 諛쒗뻾씪 2019.03.01
  • 뙆씪醫낅쪟 븘겕濡쒕껙(pdf)
  • 諛쒗뻾湲곌 븳援鍮꾪뙆愿닿궗븰쉶
  • 븳닚슦, 議곗듅쁽
damage in rail fastening systems. The vibration of a rail clamped and supported by viscoelastic pads is significantly influenced by dynamic support properties. Formation of a defect in the rail fastening system induces changes in the flexural wave propagation characteristics owning to the discontinu
  • 럹씠吏 6럹씠吏
  • 媛寃 6,000썝
  • 諛쒗뻾씪 2018.08.23
  • 뙆씪醫낅쪟 븘겕濡쒕껙(pdf)
  • 諛쒗뻾湲곌 븳援鍮꾪뙆愿닿궗븰쉶
  • 諛뺤젙썝, 諛뺤솉
The rail/wheel rolling contact affects the microstructure in the surface layer of rail. Recently, continuum damage mechanics allows us to describe the microprocesses involved during the straining of materials and structures at the macroscale. Elastic and plastic strains, the corresponding hardening
  • 럹씠吏 7럹씠吏
  • 媛寃 6,000썝
  • 諛쒗뻾씪 2019.03.08
  • 뙆씪醫낅쪟 븘겕濡쒕껙(pdf)
  • 諛쒗뻾湲곌 븳援留덈┛뿏吏땲뼱留곹븰쉶
  • 媛뺤꽦닔
rail damage factors are focused on laying, vehicle conditions, driving speed and driving habits and overlook characteristics of track structure (elasticity, maintenance etc). Also in ballast track, as there is no special lateral spring stiffness of track also called as ballast lateral resistance in
  • 럹씠吏 12럹씠吏
  • 媛寃 6,000썝
  • 諛쒗뻾씪 2019.03.01
  • 뙆씪醫낅쪟 븘겕濡쒕껙(pdf)
  • 諛쒗뻾湲곌 븳援泥좊룄븰쉶
  • 源諛뺤쭊, 理쒖젙뿴, 泥쒕꽦, 뾼留, 媛뺤쑄꽍, 諛뺤슜嫄
rails based on accumulated passing tonnage. As recently train load decrease and rail joints wear down less, the periodic replacements of continuous welded rails can be extended. There are many kinds of rail damage like squat, head-check and corrugation. These can be taken nondestructive or naked eye
  • 럹씠吏 12럹씠吏
  • 媛寃 6,000썝
  • 諛쒗뻾씪 2019.03.01
  • 뙆씪醫낅쪟 븘겕濡쒕껙(pdf)
  • 諛쒗뻾湲곌 븳援泥좊룄븰쉶
  • 怨듭꽑슜, 꽦뜒猷, 源以삎, 諛뺤슜嫄
rail defect, but it has been limited to HSR(High Speed Railway) in domestic railway. Rail damage and defects mainly occurs during the winter, its damage and defects are detected by methods such as inspection car, inspection staff, route inspection and eliminate defects on replace rail or welding. Be
  • 럹씠吏 8럹씠吏
  • 媛寃 6,000썝
  • 諛쒗뻾씪 2019.03.01
  • 뙆씪醫낅쪟 븘겕濡쒕껙(pdf)
  • 諛쒗뻾湲곌 븳援泥좊룄븰쉶
  • 떊듅썕, 諛고쁽썒, 쑄寃쎈, 엫궓삎
rail restoration and repair using coating material on repair operation of a track. Because rail change date is decreased as rapid increase of rail damage that was affected increase of operation velocity of city railway, general railway and High-speed railway. In this study, we check the data and the
  • 럹씠吏 9럹씠吏
  • 媛寃 6,000썝
  • 諛쒗뻾씪 2019.03.01
  • 뙆씪醫낅쪟 븘겕濡쒕껙(pdf)
  • 諛쒗뻾湲곌 븳援泥좊룄븰쉶
  • 諛뺤쥌쁺, 源긽吏, 源留뚯쿋, 諛뺤슜嫄
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