發(fā)布時(shí)間：2021-08-09 06:13

　　在地震激勵(lì)作用下,部分填充的核反應(yīng)堆中的重液金屬（HLM）將會(huì)運(yùn)動(dòng),這種行為被稱為晃動(dòng)。快堆是第四代先進(jìn)的核反應(yīng)堆類型之一。在地震條件下,池式快堆主容器中的自由液面可能會(huì)晃動(dòng)高達(dá)幾米的高度,這將會(huì)對(duì)主容器壁造成沖擊載荷。在本研究中,使用ANSYS-CFX（16.0版本）軟件分別研究了在地震激勵(lì)下三維環(huán)形儲(chǔ)液罐中有無(wú)阻礙的情況下的液體晃動(dòng)行為。為了在部分充滿液體的容器中模擬三維不可壓縮的粘性兩相流,使用了基于有限體積法的流體體積法（VOF）。通過(guò)使用表達(dá)式,外部地震激勵(lì)被水平地施加在儲(chǔ)液罐的x方向上。模擬使用控制時(shí)間變量法共進(jìn)行了 10s。本工作的目的是通過(guò)計(jì)算研究地震頻率對(duì)環(huán)形儲(chǔ)罐快速反應(yīng)堆主容器的抗震性能的影響,以檢查沖擊壓力相對(duì)于不同位置的變化對(duì)晃動(dòng)現(xiàn)象影響。研究分為儲(chǔ)液罐中有無(wú)檔板兩種情況,用罐內(nèi)液體的固有頻率進(jìn)行地震激勵(lì)。分析表明,如果儲(chǔ)液罐受到共振激勵(lì),則液體晃動(dòng)將變得很劇烈,壁面上的沖擊壓力會(huì)加劇。結(jié)果表明,在儲(chǔ)液罐內(nèi)有垂直擋板的情況下,在每個(gè)截面中觀察到自由表面的線性運(yùn)動(dòng)。罐壁不同位置的壓力隨時(shí)間變化也通過(guò)某一確定點(diǎn)來(lái)測(cè)量研究. 

【文章來(lái)源】：華北電力大學(xué)(北京)北京市 211工程院校 教育部直屬院校

【文章頁(yè)數(shù)】：69 頁(yè)

【學(xué)位級(jí)別】：碩士

【文章目錄】：
摘要
ABSTRACT
CHAPTER 1. INTRODUCTION
    1.1 INTRODUCTION
    1.2 BACKGROUND
    1.3 LITERATURE REVIEW
        1.3.1 Theoretical analytic method
        1.3.2 Numerical method
        1.3.3 Experimental method
    1.4 OBJECTIVE WORK AND STRUCTURE OF THE THESIS
        1.4.1 Objective work
        1.4.2 Structure of the thesis
CHAPTER 2. THEORY AND PHYSICAL MODEL
    2.1 LINEAR WAVE THEORY
        2.1.1 Free surface representation
        2.1.2 Fluid structure interaction (FSI)
    2.2 PHYSICAL MODEL
        2.2.1 Motion of the tank
        2.2.2 Sinusoidal motion of tank
        2.2.3 Tank with baffle
    2.3 GOVERNING EQUATIONS
CHAPTER 3. CFD MODEL AND VALIDATION
    3.1 COMPUTATIONAL FLUID DYNAMICS (CFD)
    3.2 CFX THEORY
    3.3 ANSYS-CFX MODELING
        3.3.1 Ansys-CFX setup
    3.4 CFD VALIDATION
        3.4.1 CFD Validation
        3.4.2 Simulation set-up
CHAPTER 4. SIMULATION RESULTS AND DISCUSSION
    4.1 PRESSURE VARIATION ON THE RIGHT WALL OF THE ANNULAR TANK ATDIFFERENT LOCATIONS
    4.2 CASE 1 WHEN ANNULAR TANK SUBJECTED TO SEISMIC EXCITATION OFNATURAL FREQUENCY (f_n)
    4.3 CASE 2 WHEN ANNULAR TANK SUBJECTED TO SEISMIC EXCITATION OF 0.5TIMES OF NATURAL FREQUENCY(0.5f_n)
    4.4 CASE 3 WHEN ANNULAR TANK SUBJECTED TO SEISMIC EXCITATION OF 1.5TIMES OF NATURAL FREQUENCY(1.5f_n)
    4.5 SUMMARY OF RESULTS PRESSURE VARIATION WITH TIME
CHAPTER 5. CONCLUSIONS AND FUTURE WORK
REFERENCES
ACKNOWLEDGEMENTS
NOMENCLATURES


【參考文獻(xiàn)】：
期刊論文
[1]SIMULATION OF TANK SLOSHING BASED ON OPENFOAM AND COUPLING WITH SHIP MOTIONS IN TIME DOMAIN[J]. LI Yu-long, ZHU Ren-chuan, MIAO Guo-ping, FAN Ju State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.  Journal of Hydrodynamics. 2012(03)



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