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Evaluation of the structural integrity of a sandwich composite train roof structure

机译：夹层复合火车屋顶结构的结构完整性评价

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We have evaluated the structural integrity of a sandwich composite train roof which can find a lightweight, cost saving solution to large structural components for rail vehicles in design stages. The sandwich composite train roof was 11.45 meters long and 1.76 meters wide. The FE analysis was used to calculate the stresses, deflections and natural frequencies of the sandwich composite train roof against the weight of air-condition system. The 3D sandwich FE model was introduced to consider the hollow aluminum frames jointed to both sides of the sandwich train roof. The results shown that the structural performances of a sandwich composite train roof under the loading conditions specified were proven and the use of aluminum reinforced frame was beneficial with regard to weight saving in comparison to steel reinforced frame. Also, we have manufactured the prototype of sandwich composite train roof on the basis of analysis results.
机译：我们评估了三明治复合火车屋顶的结构完整性，可以找到一种轻量级，成本节省的设计阶段铁路车辆的大型结构部件。夹层复合火车屋顶11.45米长，宽1.76米。 FE分析用于计算夹层复合列车屋顶对空调系统重量的应力，偏转和自然频率。介绍了3D三明治Fe模型，以考虑中空铝框架连接到三明治列车屋顶两侧的空心铝框架。结果表明，在规定的装载条件下，夹层复合列车屋顶的结构性能被证明，铝加强框架的使用与钢筋架相比，有利于重量保存。此外，我们在分析结果的基础上制造了夹心复合火车屋顶的原型。

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