차량장착용 볼트의 안전성평가

초록

The stress of connection points between railway vehicle equipment and carbody is considered as one of the important railway safety factor under the vehicle service condition. If any material or equipment drop in to the rail during the service condition, the vehicle can be lose its control as well as run off the rail. The bolt safety evaluation method by using hand calculation is broadly used by manufacturer is introduced in this paper. Two different kinds of the bolt, such as regular bolt and the bolt aluminum extruded carbody use, are tested based on U.I.C according to equipment fixed. The effect of holder and base to bolt under the loading condition is analyzed on this paper.sThe compression wave produced when a high-speed train enters a tunnel propagates along the tunnel ahead of the train. The micro pressure wave related to the compression wave is a special physics phenomena created by high-speed train-tunnel interfaces. On this work, the method for reducing the micro pressure wave is to delay the gradient of the compression wave by using aerodynamic structures. The objective of this paper is to determine the optimum angle of the slanted portal using the moving model rig. According to the results of the present study, the maximum value of micro pressure wave is reduced by 19.2% for the 45 slanted portal installed at the entrance of the tunnel and reduced by 1.9% for the 45 slanted portals at the entrance and exit of the tunnel. Also it is reduced by 34.6% for the 30 slanted portals installed at the entrance and exit of the tunnel.