温度-应力试验机试件过渡曲线形状优化研究
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摘要
针对混凝土试件在温度-应力实验过程中易在其夹头部位断裂这一问题,采用形状优化设计与有限元分析相结合的方法,对试验机试件夹头部位渡曲线进行形状优化设计,提出了双曲率圆弧曲线、样条曲线两种线型作为试件过渡曲线的优化设计方案,并分别利用ANSYS Workbench中的Goal Driven Optimization优化模块对其进行了优化求解。优化结果表明,试件夹头部位过渡曲线采用样条曲线的优化方案,能够最大程度上降低夹头部位应力集中现象,使混凝土试件尽可能地避免了在其夹头部位断裂,从而使混凝土温度-应力试验机所测得的实验结果更加可靠,为新一代温度-应力试验机的研制提供了理论指导。
For the issue of that concrete test-piece is easy to be broken in the process of temperature-stress test,The shape optimization design of the chuck section of the test machine was carried out with using the method of shape optimization design and finite element analysis,proposing double curvature arcs,splines as the design of transition curve shape,and solve this optimization model of two linear with using the optimization module of Goal Driven Optimization in ANSYS Workbench,obtaining the best strategies for concrete test-piece. The optimization results show that the spline curve is optimized by spline curve,minimizing the stress concentration on the concrete test-piece,avoiding its fracture as much as possible,so that concrete temperature-stress testing machine results measured more reliably,Which provides a theoretical guidance for the development of a new generation of temperature-stress testing machine.
For the issue of that concrete test-piece is easy to be broken in the process of temperature-stress test,The shape optimization design of the chuck section of the test machine was carried out with using the method of shape optimization design and finite element analysis,proposing double curvature arcs,splines as the design of transition curve shape,and solve this optimization model of two linear with using the optimization module of Goal Driven Optimization in ANSYS Workbench,obtaining the best strategies for concrete test-piece. The optimization results show that the spline curve is optimized by spline curve,minimizing the stress concentration on the concrete test-piece,avoiding its fracture as much as possible,so that concrete temperature-stress testing machine results measured more reliably,Which provides a theoretical guidance for the development of a new generation of temperature-stress testing machine.
引文
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[2]罗亚波,张晓东,符达良.轴肩过渡曲线形状优化研究[J].武汉交通科技大学学报,1999,23(5):492-495.(Luo Ya-bo,Zhang Xiao-dong,Fu Da-liang.Study on shape optimization of shaft shoulder transition curve[J].Journal of Wuhan University of Transportation Science and Technology,1999,23(5):492-495.)
[3]王凌琳,袁庆霓,刘叶艳.基于ANSYS Workbench的双立柱堆垛机结构分析及优化[J].机械设计与制造,2016(2):217-210.(Wang Ling-lin,Yuan Qing-ni,Liu Ye-Yan.Structure analysis and optimization of double column stacker based on ANSYS Workbench[J].Machinery Design&Manufacture,2016(2):217-210.)
[4]刘鸿文.材料力学[M].北京:高等教育出版社,2011(5).(Liu Hong-wen.Materials Mechanics[M].Beijing:Higher Education Press,2011(5).)
[5]陈科,殷磊,陈振华.万向十字轴轴根过渡结构的优化设计和分析[J].中国机械工程,2014,25(23):3155-3159.(Chen Ke,Yin Lei,Chen Zhen-hua.Optimization design and analysis of the axial-root transitio n structure of the universal[J].China Mechanical Engineering,2014,25(23):3155-3159.)
[6]赵向飞,刘红旗,张敬彩.基于ANSYS的齿根过渡曲线形状优化研究[J].机械设计与制造,2013(3):1-3.(Zhao Xiang-fei,Liu Hong-qi,Zhang jing-cai.Shape optimization of tooth transition curve based on ANSYS[J].Machinery Design&Manufacture,2013(3):1-3.)
[7]王海波,张岚,孟庆鑫.海洋废弃平台桩基拆除绳锯机夹紧齿优化设计研究[J].机床与液压,2014,42(5):21-23.(Wang Hai-bo,Zhang lan,Meng Qing-xin.Optimization design of clamp teeth for pile foundation demolition of wire saw machine for marine waste platform[J].Machine Tool&Hydraulics,2014,42(5):21-23.)
[8]何彬.冷镦机床身再设计孔洞的形状优化[J].机械设计与制造,2016(2):241-243.(He Bing.Shape optimization of redesigned machine tool holes[J].Machinery Design&Manufacture,2016(2):241-243.)
[9]Pedersen N L.Stress concentrations in keyways and optimization of keyway design[J].Journal of Strain Analysis for Engineering Design,2010,45(8):1-4.
[10]Sabuncuoglu,B.Micro-scale finite element analysis of stress concentration in steel fiber composite under transverse loading[J].Journal of Composite Materials,2015,49(9):105-106.