프리마운팅 탄성구조를 적용한 고속철도 제동디스크의 열구조 해석
Thermal Structure Analysis of High-speed Railway Brake Disk with Pre-mounting Elastic Structure
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초록
일반적으로 제동디스크는 제동과정 동안 가열과 냉각을 반복하여 열에 의한 피로손상이 발생한다. 제동과정에서 핫 스팟 및 높은 열응력이 마찰면과 체결부 주위에 발생하고, 디스크의 상하부면에작용하는 제동 패드의 접촉력이 달라 마모량의 차이가 발생한다. 본 논문에서는 이러한 문제점들을개선하기 위해 일반 화물차와 같은 상용차량 제동디스크의 프리마운팅 탄성구조를 고속철도 차량제동디스크에 적용하여 위의 문제들의 개선방안을 제안하였다. 기존 철도 차량의 솔리드(Solid) 제동디스크와 프리마운팅 탄성구조 제동디스크에 대한 유한요소모델을 구성하고, 다이나모 시험조건을 적용하여 해석 모델을 구성하여 해석을 진행하였다. 최종적으로 해석 결과를 비교분석하여 제안된 탄성구조 방법에 대해 해석적으로 검증하였다.
Abstract
In general, brake disks cause fatigue damage due to heat by repeating heating and cooling during the braking process. During the braking process, hot spots and high thermal stress occur around the friction surface and the fastening part. And the contact force of the braking pads acting on the upper and lower surfaces of the disk is different, resulting in a difference in the amount of wear. In this paper, a structure for improving the above problems is proposed by applying a pre-mounting elastic structure of a braking disk of a commercial vehicle to a brake disk of a high-speed railway vehicle to improve these problems. A finite element model is configured for a solid brake disk and a pre-mounting elastic brake disk of an existing railway vehicle, and an analysis model is developed in which a dynamo test method is applied as an analysis condition. Finally, the analysis results are compared and analyzed to verify the proposed structure analytically.
참고문헌 (11)
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