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Issue:ISSN 1006-5539
          CN 51-1183/TE

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    Your Position ：Home->Past Journals Catalog->2011 Vol.4

    Study on Vibration Characteristics of Submarine Suspended Pipeline
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    Key Words：Submarine pipeline；Suspended pipeline；Natural frequency；Critical length；Finite element
    Abstract：Due to seawater erosion，pipeline segments at connection locations between submarine risers and horizontal pipelines will be suspended，which will seriously affect safe operation of these pipelines. The ability to resist deformation will become weak if suspended pipeline segments are long，combined action of such factors as pipeline itself loads and external loads will result in pipeline damage，which will lead to huge economic losses and environmental pollution. In the study，based on Winkler linear theory of soil，same springs with equal spaces are used stead of the interaction between pipeline and foundation，vibration differential equation is established according to Hamilton principle，ANSYS finite element is adopted to numerically simulate three?鄄dimensional submarine suspended pipeline and study its vibration characteristics，analyzed are effects of such factors as axial force，internal pressure，outflow and soil rigidity coefficient on its vibration characteristics and obtained are natural frequency and critical length of submarine suspended pipeline.
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