柔性与形态耦合仿生抗冲蚀三维数值模拟  

Three dimensional numerical simulation on anti-erosion of coupling bionics of flexibility and configuration

作　　者：张俊秋[1] 韩志武[1] 江佳廉[1] 戈超[1] 吕尤[1] 王超飞[1] 任露泉[1] 

机构地区：[1]吉林大学工程仿生教育部重点实验室,长春130022

出　　处：《吉林大学学报（工学版）》2011年第1期139-143,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金重点项目(50635030);'973'国家基础研究规划项目前期研究专项项目(2007CB616913);吉林省科技发展计划项目(20090340);吉林大学研究生创新基金项目(20091015)

摘　　要：利用有限元软件ANSYS/LS-DYNA,分别对4种具有不同表面形态(光滑、凹坑形、柔性与光滑耦合、柔性与凹坑耦合)的试件的耐冲蚀性能进行了三维数值模拟,计算出冲蚀磨损过程中等效应力的变化情况,并与试验结果进行了对比。结果表明,数值模拟的试件耐冲蚀顺序依次为:柔形与凹坑耦合>柔形与光滑耦合>凹坑形态>光滑形态,该结果与试验结果完全吻合,说明采用三维有限元法可以较好地预测冲蚀磨损。The anti-erosion effects of different surface morphologies and their combinations were investigated by three dimensional finite element simulation using ANSYS/LS-DYNA. The surface morphologies include smooth surface, surface with concave units, flexibility and smoothness, and coupling flexibility and concave. The equivalent stress during the erosion process was calculated. Results show that the calculated equivalent stress matches the actually measured wear loss very well. It is shown that appropriate selection of ANSYS/LS-DYNA element types and a set of parameters can achieve different desired surface morphologies. Simulation results also show that the anti-erosion performances of the four surfaces are in the order： coupling flexibility and concave 〉 flexibility and smoothness 〉 surface with concave units 〉 smooth surface. These results accord with experiment results well, indicating that three dimensional finite element simulation can predict surface anti- erosion performance.

关 键 词：工程仿生学 耦合仿生 冲蚀 非线性有限元分析 ANSYS/LS—DYNA 等效应力 

分 类 号：TB17[生物学—生物工程]