本文選題：浮體Morison方程　切入點(diǎn)：半潛式超大型浮式結(jié)構(gòu)　出處：《船舶工程》2016年12期

【摘要】：文章研究了半潛式超大型浮式結(jié)構(gòu)中移動(dòng)式海上基地(MOB)在高海況隨機(jī)波作用下波浪力的簡(jiǎn)化計(jì)算方法�；谛拚蟮母◇wMorison方程,理論推導(dǎo)得出了MOB結(jié)構(gòu)波浪力的計(jì)算公式。以MOB結(jié)構(gòu)"三模塊模型"為例,研究其在6級(jí)海況條件下基于Bretschneider譜模擬的隨機(jī)不規(guī)則波中浪向角變化在0°~90°范圍內(nèi),各模塊的波浪力—?dú)v時(shí)規(guī)律,將簡(jiǎn)化算法的計(jì)算結(jié)果統(tǒng)計(jì)值與勢(shì)流理論的結(jié)果進(jìn)行對(duì)比,并對(duì)二者進(jìn)行誤差分析。結(jié)果表明,運(yùn)用簡(jiǎn)化算法得到的MOB波浪力統(tǒng)計(jì)結(jié)果與勢(shì)流理論的結(jié)果吻合程度高,且二者之間的相對(duì)誤差在工程允許的范圍之內(nèi),可充分驗(yàn)證簡(jiǎn)化算法的正確性、合理性與可行性。文中提出的算法相比于勢(shì)流理論更加簡(jiǎn)單,建議在結(jié)構(gòu)初步設(shè)計(jì)階段運(yùn)用該方法,可高效評(píng)估大量不同工況下MOB結(jié)構(gòu)的波浪荷載,研究成果可為半潛式超大型浮式結(jié)構(gòu)動(dòng)力響應(yīng)研究奠定基礎(chǔ)。
[Abstract]:In this paper, a simplified method for calculating the wave forces in a semi-submersible super-large floating structure with a moving offshore base (MOB) under the action of random waves at high sea conditions is studied.Based on the modified Morison equation of floating body, the formula of wave force of MOB structure is derived theoretically.Taking the "three-module model" of MOB structure as an example, this paper studies the wave force-diachronic law of each module in the range of 0 擄~ 90 擄in random irregular wave simulated by Bretschneider spectrum under the condition of 6-level sea condition.The statistical results of the simplified algorithm are compared with the results of the potential flow theory, and the errors between the two are analyzed.The results show that the statistical results of the MOB wave forces obtained by the simplified algorithm are in good agreement with the results of the potential flow theory, and the relative error between the two methods is within the scope of engineering, which can fully verify the correctness of the simplified algorithm.Rationality and feasibility.Compared with the potential flow theory, the proposed method is more simple. It is suggested that the proposed method can be used to evaluate the wave loads of a large number of MOB structures under different working conditions.The results can be used to study the dynamic response of semi-submersible super-large floating structures.
【作者單位】： 天津大學(xué)水利工程仿真與安全國(guó)家重點(diǎn)實(shí)驗(yàn)室高新船舶與深海開(kāi)發(fā)裝備協(xié)同創(chuàng)新中心;重慶交通大學(xué)河海學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(51679166);國(guó)家自然科學(xué)基金創(chuàng)新研究群體科學(xué)基金(51321065) 交通運(yùn)輸部交通建設(shè)科技項(xiàng)目(2014328224040)
【分類號(hào)】：P751;P731.2

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