本文關(guān)鍵詞： 球形儲(chǔ)罐 流固耦合 地震反應(yīng) 基礎(chǔ)不均勻沉降 有限元　出處：《東北石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：球形儲(chǔ)罐與其他壓力容器相比有很多優(yōu)點(diǎn),如占地面積小、受力情況好、承壓能力高,現(xiàn)場安裝,運(yùn)輸方便。在其進(jìn)行正常的工作運(yùn)行一段時(shí)間后,經(jīng)常會(huì)出現(xiàn)基礎(chǔ)不均勻沉降等質(zhì)量問題,而且大部分球形儲(chǔ)罐在出現(xiàn)這類問題時(shí),常常伴有球形儲(chǔ)罐的支柱出現(xiàn)傾斜,還會(huì)在支柱上產(chǎn)生一個(gè)附加的應(yīng)力,若附加應(yīng)力值較大,則可能使支柱超過其最大的容許應(yīng)力,有可能會(huì)產(chǎn)生球形儲(chǔ)罐結(jié)構(gòu)失穩(wěn),從而使球罐產(chǎn)生破壞。因此研究球形儲(chǔ)罐的基礎(chǔ)不均勻沉降,具有實(shí)際的工程意義與工程價(jià)值。本文以1000m~3儲(chǔ)罐為例,通過使用SPH方法與等效質(zhì)量法建立有限元模型,討論了流固耦合作用對地震反應(yīng)的影響,對基礎(chǔ)不均沉降下的球罐模型分別在液壓試驗(yàn)工況與地震工況進(jìn)行了模擬分析,具體的內(nèi)容如下:1.介紹了光滑粒子流體動(dòng)力學(xué)方法(SPH),闡述了SPH方法的基本原理以及拉格朗日型的Navier-Stokes方程的SPH方法表示。2.通過使用SPH方法建立Antoci等人設(shè)計(jì)的試件有限元模型,并將數(shù)值分析結(jié)果與實(shí)驗(yàn)進(jìn)行對比,證明SPH方法的可靠性與合理性。3.使用SPH方法建立了考慮流固耦合作用下的球形儲(chǔ)罐的有限元模型,并用加速度時(shí)程分析方法進(jìn)行地震反應(yīng)分析,結(jié)果表明考慮流固耦合作用下球形儲(chǔ)罐模型的頂點(diǎn)位移、柱底部剪力、柱底支反力和拉桿應(yīng)力與以等效質(zhì)量法建立的球形儲(chǔ)罐模型的計(jì)算結(jié)果在數(shù)值上要小許多,同時(shí)隨著時(shí)間衰減的也更加劇烈,證明了流固耦合作用對球形儲(chǔ)罐的地震反應(yīng)有明顯的影響。4.分別建立考慮單根支柱下沉、整體向一個(gè)方向傾斜、中間下沉以及兩側(cè)下沉這個(gè)四種基礎(chǔ)沉降方式下,儲(chǔ)液量為89%的1000m~3球形儲(chǔ)罐有限元模型,分析支柱處在水壓試驗(yàn)狀態(tài)下應(yīng)力分布情況。5.采用SPH方法分別建立容積為400m~3、650m~3、1000m~3球罐的流固耦合有限元模型,分析球罐容積對其基礎(chǔ)不均勻沉降的影響。6.通過SPH方法與等效質(zhì)量法分別建立了容積為1000m~3儲(chǔ)液89%的球形儲(chǔ)罐有限元模型,對球罐支柱在四種基礎(chǔ)不均勻沉降情況下進(jìn)行安全性分析,并且分析了不同地震波對球罐基礎(chǔ)不均勻沉降的影響。
[Abstract]:The spherical tank has many advantages compared with other pressure vessels, such as small footprint, good stress condition, high bearing capacity, on-site installation, convenient transportation. Work in normal operation for a period of time in the post, often appear uneven settlement of the foundation of quality problems, and most of the spherical tank in such problems when often, with pillar of the spherical tank tilt, will produce an additional stress in the pillars, if additional stress is large, it may make the pillar exceeds its maximum allowable stress, may produce spherical tank structure instability, so that the tank damage. Therefore the research foundation of the spherical tank the uneven settlement, engineering and engineering has practical value. This paper takes 1000m~3 tank as an example, by using the SPH method to establish the finite element model and equivalent mass method, discussed the fluid solid coupling effect on seismic response Influence of spherical tank model of foundation uneven settlement under respectively in the hydraulic test conditions and seismic conditions were simulated and analyzed, the specific contents are as follows: 1. introduces the smoothed particle hydrodynamics (SPH) method, elaborated the SPH Navier-Stokes equation SPH method and the principle of the Lagrange type representation of.2. Antoci et al design test a finite element model is established by using the SPH method, and the results of the numerical analysis and experimental comparison show that finite element flow of spherical tank and solid coupling model of considering reliability of the SPH method and the rationality of.3. using the SPH method, and the acceleration time history analysis method for seismic response analysis, the results indicate that the consideration of the top displacement the spherical tank model of fluid solid coupling, column bottom shear model, spherical tank column bottom counterforce and bar stress and to establish the equivalent mass method The numerical results in the smaller many, at the same time with the time decay is more intense, proved that the seismic response of FSI on spherical tanks with single pillar were established considering sinking effect of.4. is obvious, the overall tilt in one direction, the middle of sinking and the two side sinking in this four kinds of foundation settlement mode. The reservoir volume model for 1000m~3 spherical tank 89% finite element analysis, the stress distribution in the pillar of.5. were established by the method of SPH 400m~3650m~31000m~3 spherical tank volume pressure test under the condition of fluid solid coupling finite element model are established for finite element model of spherical tank volume 89% 1000m~3 liquid storage tank volume on the basis of the analysis of not the settlement effect of.6. by the SPH method and the equivalent mass method of spherical tanks in four kinds of uneven settlement of foundation, the safety analysis and case analysis The influence of different seismic waves on the uneven settlement of the spherical tank foundation.

【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU433
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本文編號(hào)：1456339