基于温度场的喷丸成形数值模拟及参数优化  

Numerical Simulation and Parameter Optimization for Shot Peen Forming Process Based on Temperature Gradient

作　　者：胡凯征[1] 吴建军[1] 王涛[2] 敖志强[1] 

机构地区：[1]西北工业大学,西安710072 [2]剑桥大学

出　　处：《中国机械工程》2007年第3期292-295,共4页China Mechanical Engineering

摘　　要：从喷丸成形的客观机理出发,建立反映弹丸打击而产生宏观变形效果的等效塑性变形层概念,应用等效静态载荷温度场来模拟变形过程。温度场可以反复施加以模拟任何真实的喷丸强度,从而把一个复杂的动态冲撞过程近似地转化为一个静态加载过程。根据模拟结果,建立指定区域喷丸参数与指定节点变形位移之间的非线性关系,通过优化程序找到满足特定要求的喷丸参数优化方案,从而大大缩短了有限元模拟计算时间,可快速估量喷丸工艺时间以及喷丸成形整体效果,进而制定喷丸工艺优化方案,避免了实际生产中常用的试错方法。The shot peen forming process model presented herein can be used to properly simulate the progressive deformed plastic layer , using a notional temperature gradient to appropriate macroscopic deformation. Based on that, a nonlinear relationship between peening parameters specified for each discrete peening area and deflection at node points was set up,and then using a constrained optimization procedure to find an optimal solution subject to specific conditions. This simulation sharply reduces computation expenses,therefore it can quickly estimate peen forming process＇s time and resuit, and find an optimal solution subject to specific conditions.

关 键 词：喷丸成形 温度场 有限元模拟 参数优化 

分 类 号：TF124.36[冶金工程—粉末冶金] V261[冶金工程—冶金物理化学]