双金属复合翅片管是一种高效传热元件，容易发生流体诱导振动破坏，对其进行振动模态理论分析具有重要的工程指导意义。针对双金属复合翅片管的结构特征，将其简化为串、并联刚度系统，采用组合截面等效弯曲刚度、等效扭转刚度和等效抗拉压刚度，并结合等效质量和等效转动惯量的方法，对其弯曲、扭转和轴向振动模态进行理论解析。为了验证理论分析方法的准确性，对双金属复合翅片管的振动模态进行了实验测试和有限元分析。研究了翅片几何参数对双金属复合翅片管振动频率的影响规律。结果表明，对于矩形翅片形式的钢铝双金属翅片管，其弯曲、扭转和轴向振动频率均随翅片高度和翅片厚度的增大而减小，随翅片间距的增大而增大。
Abstract
Bimetal finned tubes are the highly efficient heat transfer components, and prone to occur flow-induced vibration damage. The modal analysis of bimetal finned tube has important engineering significance. Bimetal finned tube was reduced to series and parallel stiffness system according to its structural characteristics. The bending, torsion and axial vibration modal of a bimetal finned tube was analyzed theoretically, by using the methods of equivalent cross-sectional bending stiffness, torsion stiffness and tension-compression stiffness, combined with the equivalent mass and equivalent moment of inertia. The experimental tests and finite element analysis on vibration modal of bimetallic composite finned tubes were conducted in order to verify the accuracy of the theoretical methods. The effect of fin geometry on the natural frequencies of steel- Aluminum bimetal finned tubes with rectangular fins was investigated. The results show that its natural frequencies decrease with the fin height and fin thickness increases, and increase with the fin pitch increases.
关键词
双金属翅片管 /
振动模态 /
等效截面刚度 /
等效质量 /
等效转动惯量
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Key words
bimetallic finned tubes /
vibration modal /
equivalent cross-sectional stiffness /
equivalent mass /
equivalent moment of inertia
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参考文献
[1] Goldstein R J, Ibele W E, Patankar S V. Heat transfer—A review of 2004 literature [J]. International Journal of Heat and Mass Transfer, 2010, 53:4343–4396.
[2] Kuntysh V B, Sankovich E S, Mulin V P. An energy-saving nondestructive tester for the thermal performance of bimetallic finned tubes [J]. Chemical and Petroleum Engineering, 2007, 43(3–4):227-233.
[3] Piir A É, Roshchin S P, Kuntysh V B, et al. Thermal and aerodynamic characteristics of banks of bimetallic finned tubes manufactured by the oktyabr’skkhimmash plant [J]. Chemical and Petroleum Engineering, 2006, 42(5–6): 235-240.
[4] 杨小琼, 王启杰, 王晓军.翅片管接触热阻的理论预测和试验研究[J]. 化工学报, 1996, 47(4) : 427-432.
YANG Xiao-qiong, WANG Qi-jie, WANG Xiao-jun. heoretical prediction and experimental investigation of finned tubes thermal contact resistance [J]. Journal of Chemical Industry and Engineering, 1996, 47(4): 427-432.
[5] 刘伟军, 付国民, 张书华. Al—Cu翅片管的单管换热及阻力特性[J]. 哈尔滨理工大学学报, 1996, 1(1): 17-20.
LIU Wei-jun, FU Guo-ming, ZHANG Shu-hua. Convective transfer and resistance characteristics of single aluminum-copper fin-tube [J]. Journal of Harbin University of Science and Technology, 1996, 1(1): 17-20.
[6] Longatte E, Baj F, Hoarau Y, et al. Advanced numerical methods for uncertainty reduction when predicting heat exchanger dynamic stability limits: Review and perspectives [J]. Nuclear Engineering and Design, 2013, 258 :164– 175.
[7] Goyder H G D. Flow induced vibration in heat exchangers [J]. Institution of Chemical Engineers, 2001, 80, Part A: 226-232.
[8] GB151-1999. 管壳式换热器[S]. 北京: 中国标准出版社, 1999.
GB151-1999. Shell and Tube Heat Exchangers [S]. Beijin: China Standard Press, 1999.
[9] 谢志勇, 周其斗, 纪刚. 双层柱壳的流固耦合模态计算与试验研究[J]. 海军工程大学学报, 2009, 21(2): 97-101.
XIE Zhi-yong, ZHOU Qi-dou, JI Gang. Computation and measurement of double shell vibration mode with f luid load [J]. Journal of Naval University of Engineering, 2009, 21(2): 97-101.
[10] 金广文, 何琳, 姜荣俊. 流固耦合对双层圆柱壳体振动特性的影响[J]. 武汉理工大学学报(交通科学与工程版), 2007, 31(5): 882-885.
JIN Guang-wen，HE Lin，JIANG Rong-jun. Influence of fluid-structure coupling for vibration transmissibility of ribbed cylindrical double-shell [J]. Journal of Wuhan University of Technology (Transportation Science & Engineering), 2007, 31(5): 882-885.
[11] 魏建辉, 陈美霞, 乔志李等. 湍流激励下单双层圆柱壳振动特性对比[J]. 华中科技大学学报(自然科学版), 2012, 40(8): 44-48.
WEI Jian-hui, CHEN Mei-xia, QIAO Zhi-li, et al. Comparing the vibration characteristics of single cylindrical shells and double ones excited by turbulent boundary layers [J]. Journal of Huazhong University of Science and Technology (Natural Science Edition), 2012, 40(8): 44-48.
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