以下为句子列表：
英文: Acoustic properties of space inside a railcar are analyzed based FEM when frequencies are lower: 1 acoustic modal inside the railcar is calculated whether coupled or uncoupled with shell of railcar, 2 acoustic field inside the railcar is calculated when a
中文: 针对某型铁路客车应用有限无法在较低的频率範围内对客车车内的声学特性进行了研究分析，得出了客车车内流体自身的模态和液体与车体耦合后车内流体的模态，并在给定激励下计算了客车车厢内部的声场。
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