基于弹塑性力学的精馏釜结构优化分析
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摘要
基于弹性力学进行结构强度分析,由于设备结构不连续处存在较大的应力奇异性,使得计算结果与设备实际所承受的应力不相符。针对某精馏釜的实际设计和结构,基于弹塑性力学理论,通过建模、划分网格、施加载荷与约束,分析该精馏釜的应力分布,并对其壁厚和加强筋结构优化。计算结果表明,基于弹塑性力学的计算结果可靠,设计壁厚小于传统方法设计方法,符合ASMEVIII-2-2015《压力容器建造另一规则》要求。
Based on the analysis of structural strength by elastic mechanics, there is a large stress singularity due to the discontinuity of the equipment structure, which makes the calculation result not consistent with the actual stress of the equipment. According to the actual design and structure of a distillation reactor, based on the theory of elastic-plastic mechanics, through modeling, meshing, loading and constraint analysis, the stress distribution of distillation kettle is analyzed; and the wall thickness and stiffener structure are optimized. The results show that the calculation results are reliable and the design of wall thickness is smaller than the traditional method. It meets the requirements of ASME Ⅷ-2-2015 "another rule of pressure vessel construction".
Based on the analysis of structural strength by elastic mechanics, there is a large stress singularity due to the discontinuity of the equipment structure, which makes the calculation result not consistent with the actual stress of the equipment. According to the actual design and structure of a distillation reactor, based on the theory of elastic-plastic mechanics, through modeling, meshing, loading and constraint analysis, the stress distribution of distillation kettle is analyzed; and the wall thickness and stiffener structure are optimized. The results show that the calculation results are reliable and the design of wall thickness is smaller than the traditional method. It meets the requirements of ASME Ⅷ-2-2015 "another rule of pressure vessel construction".
引文
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[13]朱信尧,宋保维,王鹏,等.UUV内外环肋加强耐压壳体强度与稳定性分析[J].系统仿真学报,2013,25(2):371-376.Zhu Xinyao,Song Baowei,Wang Peng,et al.Strength and stability analysis of UUV inner and outer stiffened stiffened pressure hull[J].Journal of system simulation,2013,25(2):371-376.
[14]梁瑞,王学平.含内裂纹海洋平台压力容器的疲劳寿命分析[J].兰州理工大学学报,2016,42(12):70-73.Liang Rui,Wang Xueping.Fatigue life analysis of pressure vessel with inside crack on offshore platform[J].Journal of Lanzhou University of Technology,2016,42(12):70-73.
[15]2015 ASME Boiler&Pressure Vessel Code,VIIIDivision 2,Alternative Rules for Construction of Pressure Vessels[s].
[16]2007 ASME Boiler&Pressure Vessel Code,VIIIDivision 2,Alternative Rules for Construction of Pressure Vessels[s].
[2]汤杰,王威强,苏成功,等.连续球压痕法测试压力容器钢力学性能的研究[J].振动测试与诊断,2015,35(2):281-288.Tang Jie,Wang Weiqiang,Su Chenggong,et al.Research on the Measurement of Mechanical Properties of Pressure Vessel Steels through Continuous Ball Indentation Test[J].Vibration test and diagnosis,2015,35(2):281-288.
[3]朱瑞林.圆筒形压力容器自增强若干问题研究[J].机械工程学报,2010,46(6):126-133.Zhu Ruilin.Study on Autofrettage of Cylindrical Pressure Vessels[J].Chinese Journal of Mechanical Engineering,2010,46(6):126-133.
[4]江楠,陈国旋,李兆锋.应变强化对压力容器安全裕度的影响[J].华南理工大学学报(自然科学版),2012,40(11):89-93.Jiang Nan,Chen Guoxuan,Li Zhaofeng.Effects of Strain Hardening on Safety Margin of Pressure Vessels[J].Journal of South China University of Technology(Natural Science Edition),2012,40(11):89-93.
[5]许雷雷,梁国兴.承压热冲击下压力容器断裂力学分析[J].原子能科学技术,2014,48(11):2079-2084.Xu Leilei,Liang Guoxing.Fracture Mechanics Analysis for Reactor Pressure Vessel Under Pressurized Thermal Shock[J].Atomic Energy Science and Technology,2014,48(11):2079-2084.
[6]刘超锋,陆立颖,刘建秀,等.金属压力容器腐蚀裕量的内涵[J].铸造技术,2013,34(7):839-841.Liu Chaofeng,Lu Liying,Liu Jiangxiu,et al.Connotation of Corrosion Allowance in Design of Metallic Pressure Vessel[J].Foundry Engineering,2013,34(7):839-841.
[7]郑建荣,颜建军,孙黎,等.压力容器焊接基本现象模拟与仿真研究现状及展望[J].中国机械工程,2006,17(增1):356-362.Zheng Jianrong,Yan Jianjun,Sun Li,et al.Recent Development and Status of Modeling and Simulation on the Fundamental Welding Phenomenon of Pressure Vessels[J].Chinese Mechanical Engineering,2006,17(S1):356-362.
[8]张敬才,胡幼明.压力容器水压试验压力及其利弊[J].核动力工程,2016,37(4):34-38.Zhang Jingcai,Hu Youming.Pressure for Hydrostatic Test of Pressure Vessel and Its Advantages and Disadvantages[J].Nuclear Power Engineering,2016,37(4):34-38.
[9]徐伟强,袁修干.蓄热容器内固液相变蓄热过程的仿真计算[J].系统仿真学报,2011,23(7):1346-1349.Xu Weiqiang,Yuan Xiugan.Regenerative simulation of solid-liquid phase change thermal storage container calculation[J].Journal of system simulation,2011,23(7):1346-1349.
[10]胡瀚元,谢禹钧,黄新.基于有限元法的高压球罐强度可靠性分析[J].当代化工,2015(1):187-189.Hu Hanyuan,Xie Yujun,Huang Xin.Reliability Analysis of Hyperbaric Spherical Tank Based on Finite Element Method[J].Contemporary Chemical Industry,2015,44(1):187-189.
[11]卢志珍,许京荆,王正涛,等.蒸馏塔热效应非线性屈曲行为研究[J].机械设计与制造,2014(11):75-78.Lu Zhizhen,Xu JingJing,Wang Zhengtao,et al.Research of Nonlinear Buckling Behavior of Thermal Effect of Distillation Tower[J].Machinery Design&Manufacture,2014(11):75-78.
[12]孙红梅,赵菲,张亚新.开孔接管对卧式储罐承载能力的影响分析[J].清华大学学报(自然科学版),2016,56(1):102-105.Sun Hongmei,Zhao Fei,Zhang Yaxin.Effects of openings and nozzles on the load-carrying capability of a horizontal tank[J].Journal of Tsinghua University(Science and Technology),2016,56(1):102-105.
[13]朱信尧,宋保维,王鹏,等.UUV内外环肋加强耐压壳体强度与稳定性分析[J].系统仿真学报,2013,25(2):371-376.Zhu Xinyao,Song Baowei,Wang Peng,et al.Strength and stability analysis of UUV inner and outer stiffened stiffened pressure hull[J].Journal of system simulation,2013,25(2):371-376.
[14]梁瑞,王学平.含内裂纹海洋平台压力容器的疲劳寿命分析[J].兰州理工大学学报,2016,42(12):70-73.Liang Rui,Wang Xueping.Fatigue life analysis of pressure vessel with inside crack on offshore platform[J].Journal of Lanzhou University of Technology,2016,42(12):70-73.
[15]2015 ASME Boiler&Pressure Vessel Code,VIIIDivision 2,Alternative Rules for Construction of Pressure Vessels[s].
[16]2007 ASME Boiler&Pressure Vessel Code,VIIIDivision 2,Alternative Rules for Construction of Pressure Vessels[s].
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