深海布放缆不同材料属性下应力波自由传播频率特性影响研究

发布时间：2018-01-12 07:36

  本文关键词：深海布放缆不同材料属性下应力波自由传播频率特性影响研究　出处：《海洋工程》2017年05期 　论文类型：期刊论文

  更多相关文章： 应力波 深海布放 张紧松弛 突加载荷

【摘要】：在频域对深海布放缆系统内应力波自由传播特性进行了分析。在布放缆数学建模时使用了哈密顿原理,并在建模时考虑布放缆的曲率。计算过程中保留了缆绳曲率与其弧长坐标之间的非线性关系,并最后得到了其上传播的应力纵波与应力横波的特性。通过计算得到布放缆属性和缆绳内竖直张力等参数对缆绳内自由传播频率特性的影响曲线。结果表明,这些因素对自由传播应力波的频率关系、色散关系、相速度与群速度影响显著。对于应力纵波,整个频域可被两个截止频率与一个行波截止频率分成四个区域。除了通频带之外,在低频时亦存在抑止带和行波抑止带。应力纵波仅能在通频带中以行波形式传播,而应力横波则可以在所有频率范围内以行波形式传播。
[Abstract]:The characteristics of free propagation of stress waves in deep-sea cable laying system are analyzed in frequency domain, and the Hamiltonian principle is used in the mathematical modeling of laying cable. The curvature of the cable is taken into account in the modeling, and the nonlinear relationship between the curvature of the cable and its arc length coordinates is retained in the calculation process. Finally, the characteristics of the stress longitudinal wave and the stress shear wave propagating on the cable are obtained, and the influence curves of the properties of the laying cable and the vertical tension inside the cable on the frequency characteristics of the free propagation in the cable are obtained. These factors have significant influence on the frequency relation, dispersion relation, phase velocity and group velocity of the free propagating stress wave. The whole frequency domain can be divided into four regions by two cutoff frequencies and one traveling wave cut-off frequency. At low frequency, there are suppression bands and traveling wave suppression bands. The stress wave can only propagate in the form of traveling wave in the passband, while the stress shear wave can propagate in the form of traveling wave in all frequency ranges.
【作者单位】： 上海交通大学海洋工程国家重点实验室高新船舶与深海开发装备协同创新中心;
【基金】：国家重点研发计划支持“深海多金属结核采矿试验工程”资助项目(2016YFC0304100) 国家自然科学基金支持资助项目(51239007,51509152,11632011)
【分类号】：P742
【正文快照】： 日益受到重视。为了适应大规模深海开发,各类深海开发装备的质量与体积也与日俱增。布放回收装置担负着将所有水下系统安全、可靠、平稳地布放到海底以及将其从海底回收到水面的使命。国内外各项研究表明,在遇到复杂海情的情况下,缆绳系统可能出现高速传播的突加应力,其大小甚，

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