E-viri
Recenzirano
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Liu, Xiang; Jiang, Lizhong; Xiang, Ping; Lai, Zhipeng; Liu, Lili; Cao, Shanshan; Zhou, Wen
Mechanics based design of structures and machines, 05/2023, Letnik: 51, Številka: 5Journal Article
In the dynamic analysis of railway lines, both lateral and vertical track irregularities should be considered. In addition, uncertainties in the bridge structure and train load will have different effects on the train-bridge coupled system (TBCS). This paper presents a three-dimensional model of the TBCS to study the influence of various sources of randomness on the response of the TBCS. The Karhunen-Loéve expansion is combined with the point estimate method (KLE-PEM) to calculate the statistical moment of the system response with high accuracy and efficiency. Furthermore, applicability of KLE-PEM method is discussed and the influence of different combinations of sources of randomness on the train and bridge responses under different speeds is analyzed according to the maximum range of probability values. Random track irregularities are found to have a much greater influence on the train response than uncertain parameters, whereas uncertain parameters have the greatest influence on the displacement of the bridge.
Avtor
Vnos na polico
Trajna povezava
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