内管二端用支持架固定在外管内。
Two ends of an inner tube are fixed inside the outer tube by a support.
本文第四章分别对5种类型支持架进行了模态分析和谐响应分析。
Chapter 4 undertakes mode analysis and harmonic response analysis for the 5 types of support frames.
由于所选择建立的模型有着一定的代表性，因此所得的分析的结果可以作为接触网支持架疲劳评估的理论数据。
The research in this thesis maintains a great theoretic and practical value by applying the FEA into the tiredness evaluation system of the contact line support frame.
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