本文選題：進(jìn)站管道 + 應(yīng)力分析��； 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：集氣站是整個(gè)天然氣管輸系統(tǒng)的樞紐,其中各種管道、設(shè)備正常運(yùn)行對(duì)于天然氣輸送至關(guān)重要。ANAN集氣站進(jìn)站管道包括站外埋地管道和集氣站內(nèi)地上管道。由于進(jìn)站管道結(jié)構(gòu)較復(fù)雜、輸送流體涉及油氣兩相流且流體壓力較高,容易發(fā)生應(yīng)力超標(biāo)和振動(dòng)問(wèn)題,為確保其安全運(yùn)行,有必要對(duì)ANAN集氣站進(jìn)站管道進(jìn)行應(yīng)力及振動(dòng)分析。 首先,根據(jù)設(shè)計(jì)資料利用CEASAR Ⅱ軟件對(duì)進(jìn)站管道進(jìn)行應(yīng)力分析,校核了埋地管道彎頭處應(yīng)力以及不同支撐方案下管道的一次應(yīng)力、二次應(yīng)力水平,通過(guò)比選確定管道最佳設(shè)計(jì)方案。 其次,從管道振動(dòng)由管道內(nèi)流體引起的角度出發(fā),根據(jù)簡(jiǎn)支梁力學(xué)模型,建立氣液兩相流管道的自由振動(dòng)運(yùn)動(dòng)方程,推導(dǎo)出管道的臨界流速以及前兩階固有頻率表達(dá)式,運(yùn)用Matlab軟件編程計(jì)算管道結(jié)構(gòu)參數(shù)和流體參數(shù)對(duì)管道結(jié)構(gòu)固有頻率的影響。采用正交試驗(yàn)極差法進(jìn)行了各流體參數(shù)對(duì)固有頻率的敏感性分析,結(jié)果表明截面含氣率和石油密度對(duì)管道固有頻率影響較大,天然氣流速和密度對(duì)固有頻率影響較小。 最后,運(yùn)用ANSYS Workbench軟件分析流體參數(shù)對(duì)進(jìn)站管道流固耦合振動(dòng)特性的影響,結(jié)果表明流體和管道的流固耦合作用能夠使氣液兩相流管道的固有頻率降低,但對(duì)管道模態(tài)振型影響不大。根據(jù)模態(tài)分析結(jié)果,對(duì)管道進(jìn)行諧響應(yīng)分析,得到管道位移隨頻率的變化曲線,得出其可能的共振峰值頻率以及峰值頻率對(duì)應(yīng)的應(yīng)力、位移情況,表明進(jìn)站管道在第一階固有頻率附近響應(yīng)應(yīng)力及位移最大,管道中部和三通處是管道運(yùn)行過(guò)程中重點(diǎn)監(jiān)測(cè)部位,并針對(duì)氣液兩相流進(jìn)站管道的振動(dòng)問(wèn)題提出相應(yīng)的減振措施。
[Abstract]:The gas gathering station is the hub of the whole natural gas pipeline system, in which all kinds of pipelines and equipments are very important for the natural gas transportation. Anan gas gathering station entry pipeline includes the buried pipeline outside the station and the upper pipeline in the inland of the gas gathering station. Because of the complex structure of the pipeline, the conveying fluid is involved in the two-phase flow of oil and gas and the pressure of the fluid is high, so the stress and vibration are easy to occur. In order to ensure the safe operation of the pipeline, it is necessary to analyze the stress and vibration of the pipeline in the ANAN gas collecting station. Firstly, according to the design data, the stress analysis of the pipeline entering station is carried out by using CEASAR 鈪，

本文編號(hào)：1945624