강체 기둥 모델을 이용한 급곡선 주행 산악트램의 탈선 분석

초록

It is important to secure running stability for mountain trams operating on sharp curves in mountainous areas. A 1/20 scale model of three cars with a 1 carbody-1 bogie structure was made for running tests on a sharp curve. During the tests, derailment occurred on the sharp curve when the model was driven by only the motor on the trailer car. It was possible to explain the cause of the derailment by modeling the three cars as rigid columns supported by rotating springs subjected to compressive or tensile load; the relationship between load and displacement was derived. It was found that the critical compressive load for the derailment increases as the wheel base to the length of the carbody increases, and increases as the width of the wheel flange to the wheel base increases. Based on a formula for the critical compressive load, the permissible traction force of the motor on the trailer car of the tram with 1 carbody？1 bogie structure to prevent the derailment was proposed, and its validity was confirmed through tests using scale model.

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