發(fā)布時間：2018-07-31 06:18

【摘要】：導管架平臺是我國開發(fā)海上油氣資源的一種主要的海洋平臺結構形式,經(jīng)過多年的發(fā)展,其設計、建造、安裝的技術已經(jīng)逐漸純熟,廣泛運用在近海和淺海遮蔽地區(qū),為提升我國石油、天然氣儲備做了不可磨滅的貢獻。在導管架平臺設計建造的過程中,對其結構進行動力分析十分重要,關乎著平臺在海上的作業(yè)安全。在這個過程中采用模型實驗可以避免數(shù)值模擬在計算過程中的誤差,讓研究人員更準確的把握結構的動力特性�，F(xiàn)在已經(jīng)有很多研究人員針對于模型實驗開展了相關研究。本文針對于某一導管架平臺進行模型實驗,主要研究內(nèi)容包括以下幾個方面:第一,以某現(xiàn)役導管架平臺為原型,依據(jù)彈性相似律以1:20的比例并根據(jù)實際情況進行簡化,設計建造了一個導管架動力相似實驗模型,并對原型和模型進行有限元模態(tài)計算,驗證實驗模型與原型動力相似關系,以此模型開展動力實驗研究。第二,將力錘、拾振器、數(shù)據(jù)采集設備組成測試系統(tǒng),利用錘擊法進行模態(tài)頻率檢測,測得該結構的模態(tài)頻率。第三,將模態(tài)激振器、拾振器、數(shù)據(jù)采集設備組成測試系統(tǒng),進行隨機響應曲線檢測。第四,將實驗所得結果與數(shù)值模擬的結果做比較,結果可知該動力相似模型的模態(tài)頻率和動力響應曲線與設計相符,結構動力相似相對準確。該模型實驗為日后開展損傷檢測、水下波浪響應實驗等性能檢測奠定了基礎,對平臺的安全服役具有十分重要的現(xiàn)實意義。
[Abstract]:Jacket platform is one of the main offshore platform structure forms in China to develop offshore oil and gas resources. After years of development, the design, construction and installation technology of jacket platform has become more and more mature and widely used in offshore and shallow sea sheltered areas. In order to enhance China's oil, natural gas reserves have made indelible contributions. In the course of design and construction of jacket platform, dynamic analysis of its structure is very important, which is related to the safety of platform operation at sea. In this process, the model experiment can avoid the error of the numerical simulation in the calculation process, so that the researchers can grasp the dynamic characteristics of the structure more accurately. Many researchers have done research on model experiments. In this paper, a model experiment on a jacket platform is carried out. The main research contents include the following aspects: first, taking an active jacket platform as a prototype, simplifying it according to the elastic similarity law at 1:20 and according to the actual situation. A dynamic similarity experimental model of jacket is designed and constructed. The finite element modal calculation of the prototype and the model is carried out to verify the dynamic similarity between the experimental model and the prototype. Secondly, the force hammer, vibration picker and data acquisition equipment are used to test the modal frequency of the structure, and the modal frequency of the structure is measured by hammering method. Thirdly, the test system is composed of modal exciter, vibration pick-up and data acquisition equipment, and the random response curve is detected. Fourth, the experimental results are compared with the results of numerical simulation. The results show that the modal frequencies and dynamic response curves of the dynamic similarity model are consistent with the design, and the dynamic similarity of the structure is relatively accurate. The model experiment lays a foundation for future performance detection such as damage detection, underwater wave response test and so on. It is of great practical significance for the safe service of the platform.
【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】：U674.38

【參考文獻】

相關期刊論文 前10條

1 王國棟;趙宏林;段夢蘭;陳祥余;孟元棟;;JZ20-2MUQ型導管架平臺相似模型設計研究[J];石油礦場機械;2011年11期

2 安延濤;馬汝建;;海洋平臺相似模型設計及模態(tài)實驗分析[J];船海工程;2009年03期

3 楊樝;歐進萍;;導管架式海洋平臺磁流變阻尼隔震結構的模型試驗[J];振動與沖擊;2006年05期

4 紀曉東;錢稼茹;徐龍河;;模擬環(huán)境激勵下結構模態(tài)參數(shù)識別試驗研究[J];清華大學學報(自然科學版);2006年06期

5 王培海;孫寧松;;勝利淺海油田采油平臺獨立樁有限元分析[J];勝利油田師范�？茖W校學報;2005年04期

6 徐禮華,鄒萬山;框-筒結構模型模態(tài)試驗研究與有限元分析[J];武漢大學學報(工學版);2005年05期

7 段勇,何麟書;柔性自適應桁架結構的振動控制方法實驗研究[J];計算機集成制造系統(tǒng);2005年05期

8 黃維平,楊永春,李華軍;固定式導管架平臺超常振動及減振措施試驗研究[J];振動工程學報;2004年01期

9 李華軍,王樹青,楊永春,王燕;Vibration Characteristics of An Offshore Platform and Its Vibration Control[J];China Ocean Engineering;2002年04期

10 魯亮,呂西林;振動臺模型試驗中一種消除重力失真效應的動力相似關系研究[J];結構工程師;2001年04期

，

本文編號：2154695