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拱圈淹没深度对拱桥自振特性的影响研究 被引量:1

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摘要 结构自振特性对认识结构有着重要的作用。为了研究拱圈淹没深度对其自振特性的影响规律,本文采用修正Morison方程计算动水压力,以云南某桥为算例进行有限元建模分析;得出拱桥自振频率随着拱圈淹没深度的增加而降低,拱圈全淹时,结构基频降低达23.24%;动水压力对结构低阶振型影响很大,而对六阶以上振型影响较小;存在阀值水深5 f/8,当超过这一值时,结构自振特性发生根本性的变化。
出处 《中国水运(下半月)》 2019年第12期199-200,203,共3页
基金 国家自然科学基金(51568029) 云南省交通厅项目:(项目编号:云交科2014(A)25)。
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