华中科技大学学报（自然科学版）2025，Vol.53Issue(6)：169-176,8.DOI:10.13245/j.hust.250624
铝合金组合结构搅拌摩擦焊的非线性动力学特性
Nonlinear dynamics characteristics of friction stir welding of aluminum alloy composite structure
摘要
Abstract
To investigate the nonlinear dynamics characteristics of the aluminum alloy friction stir welding system,a nonlinear dynamics model of the system was constructed.Taking into account the influence of various factors such as material flow and equivalent softened friction coefficient,the effects of feed rate in x and y directions on the vibration response of the system were investigated.Characterization methods such as time course curves,Poincaré section,spectrograms,bifurcation diagrams and Lyapunov exponents were applied to analyze the bifurcation of the system and the evolution process of the motion state under the feeding speed,and to investigate the motion mechanism of the aluminum alloy friction stir welding system.Results show that under the same welding conditions and welding parameters,during the dynamic response of the system,the influence of x-direction feeding speed on the vibration response of the system is more drastic than that of y-direction feeding speed on the vibration response of the system,and the x-direction is greatly influenced by the feeding speed,which is easy to make the system motion in a chaotic state,resulting in the agnosticism of the system motion.关键词
搅拌摩擦焊/铝合金/非线性动力学/振动特性/分岔与混沌Key words
friction stir welding/aluminum alloy/nonlinear dynamics/vibration property/bifurcation and chaos分类
金属材料引用本文复制引用
莫帅,胡勇军,黄涛疆,张伟..铝合金组合结构搅拌摩擦焊的非线性动力学特性[J].华中科技大学学报（自然科学版）,2025,53(6):169-176,8.基金项目
广西科技重大专项资助项目(桂科AA23073019,桂科AA24263074) （桂科AA23073019,桂科AA24263074）
广西杰出青年科学基金资助项目(2025GXNSFFA069016) （2025GXNSFFA069016）
国家自然科学基金资助项目(52265004) （52265004）
中国航空发动机集团科技创新平台项目(CXPT-2023-044) （CXPT-2023-044）
智能制造装备与技术全国重点实验室开放基金资助项目(IMETKF2025021). （IMETKF2025021）
