發(fā)布時間：2018-01-12 07:36

  本文關(guān)鍵詞：深海布放纜不同材料屬性下應(yīng)力波自由傳播頻率特性影響研究　出處：《海洋工程》2017年05期 　論文類型：期刊論文

  更多相關(guān)文章： 應(yīng)力波 深海布放 張緊松弛 突加載荷

【摘要】：在頻域?qū)ι詈２挤爬|系統(tǒng)內(nèi)應(yīng)力波自由傳播特性進(jìn)行了分析。在布放纜數(shù)學(xué)建模時使用了哈密頓原理,并在建模時考慮布放纜的曲率。計(jì)算過程中保留了纜繩曲率與其弧長坐標(biāo)之間的非線性關(guān)系,并最后得到了其上傳播的應(yīng)力縱波與應(yīng)力橫波的特性。通過計(jì)算得到布放纜屬性和纜繩內(nèi)豎直張力等參數(shù)對纜繩內(nèi)自由傳播頻率特性的影響曲線。結(jié)果表明,這些因素對自由傳播應(yīng)力波的頻率關(guān)系、色散關(guān)系、相速度與群速度影響顯著。對于應(yīng)力縱波,整個頻域可被兩個截止頻率與一個行波截止頻率分成四個區(qū)域。除了通頻帶之外,在低頻時亦存在抑止帶和行波抑止帶。應(yīng)力縱波僅能在通頻帶中以行波形式傳播,而應(yīng)力橫波則可以在所有頻率范圍內(nèi)以行波形式傳播。
[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.
【作者單位】： 上海交通大學(xué)海洋工程國家重點(diǎn)實(shí)驗(yàn)室高新船舶與深海開發(fā)裝備協(xié)同創(chuàng)新中心;
【基金】：國家重點(diǎn)研發(fā)計(jì)劃支持“深海多金屬結(jié)核采礦試驗(yàn)工程”資助項(xiàng)目(2016YFC0304100) 國家自然科學(xué)基金支持資助項(xiàng)目(51239007,51509152,11632011)
【分類號】：P742
【正文快照】： 日益受到重視。為了適應(yīng)大規(guī)模深海開發(fā),各類深海開發(fā)裝備的質(zhì)量與體積也與日俱增。布放回收裝置擔(dān)負(fù)著將所有水下系統(tǒng)安全、可靠、平穩(wěn)地布放到海底以及將其從海底回收到水面的使命。國內(nèi)外各項(xiàng)研究表明,在遇到復(fù)雜海情的情況下,纜繩系統(tǒng)可能出現(xiàn)高速傳播的突加應(yīng)力,其大小甚，

本文編號：1413326