本文選題：球罐 + 安全評定��； 參考：《河北科技大學(xué)》2017年碩士論文

【摘要】：本文以含缺陷液化天然氣球罐作為研究對象,采用有限元方法開展應(yīng)力強(qiáng)度因子分析工作,并依據(jù)國標(biāo)GB/T19624-2004在用含缺陷壓力容器安全評定編寫了Matlab計算程序進(jìn)行安全評定工作。選題具有一定的工程意義和應(yīng)用價值,論文工作對于保障液化天然氣球罐的安全具有一定的意義。以某內(nèi)徑為12m、壁厚為40mm、工作壓力為1.6MPa的Q345R液化天然氣球罐作為研究對象,采用有限元分析軟件ANSYS建立三維模型,分析了裂紋尖端區(qū)域的應(yīng)力分布狀況。依據(jù)有限元分析結(jié)果采用“應(yīng)力擬合法”得到了含裂紋結(jié)構(gòu)的應(yīng)力強(qiáng)度因子,通過與按照GB/T19624-2004計算得到的結(jié)果進(jìn)行對比發(fā)現(xiàn),有限元分析得到應(yīng)力強(qiáng)度因子與按照標(biāo)準(zhǔn)計算得到的應(yīng)力強(qiáng)度因子相差不超過10%,表明分析結(jié)果可靠。根據(jù)GB/T19624-2004規(guī)定的平面缺陷常規(guī)評定方法,針對含有表面半橢圓裂紋球罐和含有埋藏橢圓形裂紋球罐兩種結(jié)構(gòu),分別采用標(biāo)準(zhǔn)推薦公式及有限元分析兩種方法求得應(yīng)力強(qiáng)度因子,并編寫了相應(yīng)的安全評定程序。采用安全評定程序分別對缺陷尺寸在4mm×4mm到32mm×320mm之間的球罐結(jié)構(gòu)進(jìn)行了安全評定。評定結(jié)果發(fā)現(xiàn),對于含表面裂紋結(jié)構(gòu),當(dāng)缺陷尺寸在32mm×128mm時,球罐依然能夠滿足強(qiáng)度要求;對于含有埋藏裂紋的球罐,當(dāng)裂紋尺寸達(dá)到32mm×320mm時,結(jié)構(gòu)依然滿足強(qiáng)度要求。分析結(jié)果表明,相同缺陷尺寸時,含埋藏裂紋的球罐強(qiáng)度高于含有表面裂紋的球罐,埋藏裂紋的危險性小于表面裂紋。
[Abstract]:In this paper, using the finite element method (FEM) to carry out the stress intensity factor analysis of the spherical tank containing defective liquefied natural gas (LNG), and according to the national standard GB/T19624-2004, the safety assessment program of the pressure vessel containing defects has been compiled Matlab calculation program to carry out the safety assessment work. It has certain engineering significance and application value, and the work of this paper has certain significance to ensure the safety of LNG spherical tank. A Q345R liquefied natural gas spherical tank with an internal diameter of 12 m, a wall thickness of 40 mm and a working pressure of 1.6MPa was used as the research object. The finite element analysis software ANSYS was used to establish a three-dimensional model to analyze the stress distribution in the crack tip region. Based on the results of finite element analysis, the stress intensity factors of cracked structures are obtained by "stress fitting method". The results are compared with those obtained by GB/T19624-2004 calculation. The difference between the stress intensity factor obtained by finite element analysis and that obtained by standard calculation is not more than 10, which indicates that the analysis results are reliable. According to the conventional evaluation method of plane defects prescribed by GB/T19624-2004, the stress intensity factor is obtained by two kinds of structures: spherical tank with surface semi-elliptical crack and spherical tank with buried ellipse crack, respectively, by using two methods: standard recommended formula and finite element analysis. The corresponding safety assessment program is compiled. The structure of spherical tank with defect size between 4mm 脳 4mm and 32mm 脳 320mm was evaluated by safety assessment program. The results show that for the structure with surface crack, the spherical tank can still meet the strength requirements when the defect size is 32mm 脳 128mm, and for the spherical tank with buried cracks, when the crack size reaches 32mm 脳 320mm, the structure still meets the strength requirement. The results show that the strength of spherical tanks with buried cracks is higher than that of spherical tanks with surface cracks, and the danger of buried cracks is less than that of surface cracks.
【學(xué)位授予單位】：河北科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE88

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 湯國棟;廖光明;嚴(yán)斌;樊鴻;;橋梁鋼索服役破斷的安全評定與索力檢測[J];公路;2016年12期

2 周軍;樊湘芳;鄭秋艷;趙健明;黃偉力;;35CrMo鋼氣瓶熱處理時爆裂失效分析[J];金屬熱處理;2016年12期

3 李明;成志強(qiáng);王成;柳葆生;;基于BS7910標(biāo)準(zhǔn)的X70鋼環(huán)焊縫超聲相控陣檢出埋藏缺陷的安全評定[J];四川理工學(xué)院學(xué)報(自然科學(xué)版);2016年06期

4 朱杰;張亞東;佟振峰;;核電廠壓力容器材料在49-2反應(yīng)堆的輻照技術(shù)研究[J];核動力工程;2016年06期

5 熊剛;吳曉;羅濤;羅友紅;;橋(門)式起重機(jī)箱形梁結(jié)構(gòu)安全評定方法研究[J];機(jī)械強(qiáng)度;2016年06期

6 范文健;;液化天然氣儲罐爆炸事故危險性分析及人員安全疏散距離探討[J];消防技術(shù)與產(chǎn)品信息;2016年09期

7 梁瑞;晏姍姍;王芳鈺;車雪麗;;海洋平臺管道的安全評定準(zhǔn)則[J];蘭州理工大學(xué)學(xué)報;2016年04期

8 賈旭;胡緒騰;宋迎東;;基于三維裂紋尖端應(yīng)力場的應(yīng)力強(qiáng)度因子計算方法[J];航空動力學(xué)報;2016年06期

9 彭桂敏;;大型儲罐液化天然氣(LNG)危險性分析及安全控制措施[J];廣東化工;2016年08期

10 任歡;王偉;;基于概率斷裂力學(xué)含凹坑壓力管道的安全評定[J];石油化工設(shè)備;2016年02期

相關(guān)碩士學(xué)位論文 前1條

1 張希旺;微合金鋼Q345的CCT曲線及斷裂韌性研究[D];中南大學(xué);2008年

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本文編號：1831518