地震時の破損確率評価手法の基礎的研究

（試験データに基づく鉄道車両の床下装置の評価）

抄録

Since a vibration test is one of the most important programs in the manufacturing industry, many companies carry out the vibration test. The knowledge such as the transfer function, which was obtained from these tests, have been accumulated. In this study, the failure probability evaluation method of the similar structure is investigated based on the statistical analysis of these test data. In previous studies, the cabinets with a simple structure was investigated. As a result, the failure probability of the cabinet could be estimated with the failure probability curve. The confirmation of the adaptability in the failure probability evaluation method, which has been developed, is necessary. Accordingly, the failure probability evaluation method of the under-floor equipment on railroad vehicle is investigated in this report. 42 units of under-floor equipment on railroad vehicle were investigated. At first, the under-floor equipment was classified in the test condition and the mass. Secondly, the representative transfer function was decided. Furthermore, the uncertainty was also decided. The failure probability curve was investigated based on HCLPF with this uncertainty. The failure probability in under-floor equipment on railroad vehicles could be estimated with this method. Accordingly, this failure probability evaluation method can be applied to other components. Furthermore, the failure probability evaluation was compared with the vibration test result, which was confirmed the failure. As a result, the effectiveness of this failure probability evaluation method was confirmed.