本文關(guān)鍵詞：深水管道在動(dòng)力載荷作用下的局部壓潰特性研究　出處：《振動(dòng)與沖擊》2017年17期 　論文類(lèi)型：期刊論文

  更多相關(guān)文章： 深水管道 管道壓潰 動(dòng)力載荷 數(shù)值模擬

【摘要】：管道在深水環(huán)境中易遭受外壓和動(dòng)力載荷的聯(lián)合作用,該狀態(tài)下結(jié)構(gòu)的局部壓潰特性還有待與深入探索。建立了管道數(shù)值模型,模擬結(jié)構(gòu)屈曲過(guò)程并得到臨界動(dòng)力載荷幅值;對(duì)影響管道局部屈曲的動(dòng)力載荷頻率、外壓大小、管道長(zhǎng)度、初始橢圓度缺陷等敏感性因素進(jìn)行了分析。結(jié)果表明,管道截面殼振動(dòng)使管道承載能力下降是誘發(fā)局部壓潰的主因,動(dòng)力載荷對(duì)管道的危害大于靜力載荷,動(dòng)力載荷頻率接近于截面殼振動(dòng)頻率最易引發(fā)局部壓潰,管道長(zhǎng)度降低可以大大降低動(dòng)力作用下局部壓潰的可能性。
[Abstract]:Pipeline is vulnerable to the combined action of external pressure and dynamic load in deep water environment. The local collapse characteristics of the structure in this state need to be further explored. A numerical model of pipeline is established. The buckling process of the structure is simulated and the amplitude of critical dynamic load is obtained. The sensitivity factors such as the frequency of dynamic load, the size of external pressure, the length of pipeline and the defect of initial ellipticity are analyzed. The reduction of pipeline bearing capacity caused by the vibration of the cross section shell of pipeline is the main cause of local collapse. The damage of dynamic load to pipeline is greater than that of static load, and the frequency of dynamic load is close to the vibration frequency of cross section shell. The possibility of local crushing under dynamic action can be greatly reduced by reducing the length of pipeline.
【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;中海石油深海開(kāi)發(fā)有限公司;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)(2014CB046804) 國(guó)家自然科學(xué)基金(51239008;51379145) 國(guó)家工信部高技術(shù)船舶科研
【分類(lèi)號(hào)】：TE973.92
【正文快照】： 隨著技術(shù)和材料的不斷發(fā)展和應(yīng)用,目前海底管道的柔度相對(duì)越來(lái)越大,管道壁厚越來(lái)越薄。海底管道在外力和自身幾何缺陷的聯(lián)合作用下會(huì)發(fā)生局部的失穩(wěn)破壞,即管道的壓潰。壓潰的發(fā)生會(huì)使海底管道失效,之后在一定條件下極易發(fā)生的沿管道軸向的屈曲傳播會(huì)使長(zhǎng)距離的管道全線失效,，

本文編號(hào)：1419504