The weight reduction of carbody structures is of great concern in developing a high speed tilting train. Therefore, the use of composite materials as the carbody structures has many advantages due to their excellent material properties. In this paper, finite element analysis was conducted to verify the safety of the composite structures of Tilting Train eXpress (TTX). A train prototype composed of carbon/epoxy composites was manufactured to perform static loading tests according to JIS E 7105. The loading tests were simulated by structural analysis to compare with the experimental ones. The analysis results show good agreement with those of the tests in overall stress distribution and deflection, however, they did not clearly indicate the exact location and magnitude of maximum stress. To obtain more accurate and detailed results of stress distribution in local region of carbody, the submodeling approach with the local analysis using refined mesh was applied. The analyses showed the high levels of stress concentration occurred on the window frame part as the loading test results.
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机译：减轻车身结构的重量是开发高速可倾式火车的重要考虑因素。因此，将复合材料用作车身结构由于其优异的材料性能而具有许多优点。本文进行了有限元分析，以验证Tilting Train eXpress（TTX）复合结构的安全性。制造了由碳/环氧复合材料组成的火车原型，以根据JIS E 7105进行静态载荷测试。通过结构分析模拟了载荷测试，并与实验进行了比较。分析结果在总体应力分布和挠度方面与测试结果吻合良好，但是，它们并未明确指出最大应力的确切位置和大小。为了获得车身局部区域应力分布的更准确，更详细的结果，采用了基于局部网格的细化建模的子建模方法。分析表明，作为载荷测试结果，在车窗框部件上出现了高水平的应力集中。
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