鋼懸鏈線立管動力響應的參數(shù)分析與管段重量優(yōu)化研究
發(fā)布時間：2018-08-28 15:24
【摘要】：鋼懸鏈線立管作為一種新型立管型式,是深水油氣開發(fā)的首選立管。鋼懸鏈線立管在位期間,所處的環(huán)境非常復雜惡劣,承受波浪、海流、上端浮體的運動、下端海床摩擦等作用,這些荷載共同作用使立管動力響應十分復雜。本文利用ABAQUS有限元分析軟件,對鋼懸鏈線立管整體進行建模。根據(jù)垂向管土相互作用的P-y曲線模型及側(cè)向管土相互作用的三線性模型,在立管觸地段建立垂向及側(cè)向的非線性彈簧,模擬立管與海床的相互作用,并施加波浪海流荷載、浮體運動作用,計算鋼懸鏈線立管進行整體動力響應。在此基礎上,通過改變海流方向、初始懸掛角、內(nèi)徑、壁厚以研究這些參數(shù)對立管動力響應的影響。結果表明,觸地點附近處的時程應力對海流作用方向較為敏感,當立管作用方向與立管所在平面為同一平面上時,應力幅值較大;隨著懸掛角增加,立管時程最大應力出現(xiàn)位置向錨固點移動,整體應力最大值減小,立管懸掛段和流線段位置處的時程最大應力隨懸掛角的增大而增大;隨著壁厚的增加,立管各處的時程最大應力減小;立管管徑變化對動應力影響不大。此外,本文還通過改變立管不同管段的涂層密度來分析研究管段重量變化對鋼懸鏈線立管動力響應的影響。通過分析得出增大懸垂段管段重量或減小初始觸地段重量可使立管應力減小,而改變遠離觸地點的底部流線段的外部涂層密度不影響應力。沿立管弧長段存在一個特殊位置,將其作為不同涂層分布的分界處,可以顯著減小立管最大動應力;將該分界處向懸掛點或觸地點移動而偏離該位置都將增大立管最大動應力,在進行管段重量優(yōu)化時需要特別注意該特殊位置。最后通過對比重量優(yōu)化前后立管動應力表明采用管段重量優(yōu)化可以明顯改善鋼懸鏈線立管的整體動力特性,作為提高鋼懸鏈線立管可靠性的一項途徑。
[Abstract]:As a new type of riser, steel catenary riser is the preferred riser for oil and gas exploitation in deep water. When the steel catenary riser is in position, the environment is very complex and harsh, and it bears the actions of wave, current, upper floating body, bottom seabed friction and so on. These combined loads make the dynamic response of riser very complex. In this paper, ABAQUS finite element analysis software is used to model the whole steel catenary riser. According to the P-y curve model of vertical pipe-soil interaction and the trilinear model of lateral pipe-soil interaction, vertical and lateral nonlinear springs are established in the contact section of riser to simulate the interaction between riser and seabed, and the wave current loads are applied. The whole dynamic response of steel catenary riser is calculated by floating body motion. On this basis, the influence of these parameters on the dynamic response of the tube is studied by changing the direction of the current, the initial suspension angle, the inner diameter and the thickness of the wall. The results show that the time-history stress near the contact site is sensitive to the direction of current action. When the action direction of riser is on the same plane as the plane of riser, the stress amplitude is larger, and with the increase of suspension angle, The maximum stress of the vertical pipe moves to the anchoring point and the maximum stress of the whole body decreases. The maximum stress of the riser increases with the increase of the suspension angle and the thickness of the wall, and the maximum stress of the vertical pipe increases with the increase of the suspension angle, and the maximum stress of the vertical pipe increases with the increase of the wall thickness. The maximum stress of the riser is decreased and the diameter of the riser has little effect on the dynamic stress. In addition, the influence of weight variation on the dynamic response of catenary riser is studied by changing the coating density of different sections of riser. It is concluded that the stress of the riser can be reduced by increasing the weight of the tube or decreasing the weight of the initial contact section, but the stress is not affected by the change of the external coating density of the flow line at the bottom far from the contact point. There is a special position along the long segment of vertical tube arc, and the maximum dynamic stress of riser can be significantly reduced by using it as the boundary of different coating distribution, and the maximum dynamic stress of riser will be increased if the boundary is moved to the suspension point or contact point, and the maximum dynamic stress of riser will be increased when it deviates from this position. Special attention should be paid to this special position when optimizing the weight of the pipe segment. Finally, by comparing the dynamic stress of the riser before and after the weight optimization, it is shown that the overall dynamic characteristics of the catenary riser can be obviously improved by using the optimization of the weight of the steel catenary as a way to improve the reliability of the steel catenary riser.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TE95;P742
本文編號：2209807
[Abstract]:As a new type of riser, steel catenary riser is the preferred riser for oil and gas exploitation in deep water. When the steel catenary riser is in position, the environment is very complex and harsh, and it bears the actions of wave, current, upper floating body, bottom seabed friction and so on. These combined loads make the dynamic response of riser very complex. In this paper, ABAQUS finite element analysis software is used to model the whole steel catenary riser. According to the P-y curve model of vertical pipe-soil interaction and the trilinear model of lateral pipe-soil interaction, vertical and lateral nonlinear springs are established in the contact section of riser to simulate the interaction between riser and seabed, and the wave current loads are applied. The whole dynamic response of steel catenary riser is calculated by floating body motion. On this basis, the influence of these parameters on the dynamic response of the tube is studied by changing the direction of the current, the initial suspension angle, the inner diameter and the thickness of the wall. The results show that the time-history stress near the contact site is sensitive to the direction of current action. When the action direction of riser is on the same plane as the plane of riser, the stress amplitude is larger, and with the increase of suspension angle, The maximum stress of the vertical pipe moves to the anchoring point and the maximum stress of the whole body decreases. The maximum stress of the riser increases with the increase of the suspension angle and the thickness of the wall, and the maximum stress of the vertical pipe increases with the increase of the suspension angle, and the maximum stress of the vertical pipe increases with the increase of the wall thickness. The maximum stress of the riser is decreased and the diameter of the riser has little effect on the dynamic stress. In addition, the influence of weight variation on the dynamic response of catenary riser is studied by changing the coating density of different sections of riser. It is concluded that the stress of the riser can be reduced by increasing the weight of the tube or decreasing the weight of the initial contact section, but the stress is not affected by the change of the external coating density of the flow line at the bottom far from the contact point. There is a special position along the long segment of vertical tube arc, and the maximum dynamic stress of riser can be significantly reduced by using it as the boundary of different coating distribution, and the maximum dynamic stress of riser will be increased if the boundary is moved to the suspension point or contact point, and the maximum dynamic stress of riser will be increased when it deviates from this position. Special attention should be paid to this special position when optimizing the weight of the pipe segment. Finally, by comparing the dynamic stress of the riser before and after the weight optimization, it is shown that the overall dynamic characteristics of the catenary riser can be obviously improved by using the optimization of the weight of the steel catenary as a way to improve the reliability of the steel catenary riser.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TE95;P742
【參考文獻】
相關期刊論文 前6條
1 李艷;李欣;;深水鋼懸鏈線立管非線性動力分析[J];船舶工程;2013年06期
2 孟慶飛;黃維平;;鋼懸鏈線立管與海底相互作用彈性基礎梁模擬方法研究[J];海洋工程;2013年04期
3 何寧;王波;王輝;梁輝;張昭;;深水鋼懸鏈線立管三維動力分析[J];中國海上油氣;2010年02期
4 梁輝;;深水SCR立管觸地區(qū)域管土作用研究進展(英文)[J];Journal of Marine Science and Application;2009年02期
5 黃維平;白興蘭;李華軍;;國外深水鋼懸鏈線立管研究發(fā)展現(xiàn)狀[J];中國海洋大學學報(自然科學版);2009年02期
6 杜柏松;項海帆;葛耀君;朱樂東;;剪切效應梁單元剛度和質(zhì)量矩陣的推導及應用[J];重慶交通大學學報(自然科學版);2008年04期
，本文編號：2209807
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