振动时效效果现场判断的判据  

Effectiveness Criterion for the in Situ Evaluation of Vibratory Stress Relieving Process

作　　者：许旸[1] 孙茂才[2] 李庆本[3] 

机构地区：[1]西安理工大学,西安710048 [2]哈尔滨工业大学,哈尔滨150001 [3]哈尔滨焊接研究所,哈尔滨150080

出　　处：《焊接学报》2002年第2期63-67,共5页Transactions of The China Welding Institution

摘　　要：以复杂构件为对象 ,讨论了粘性阻尼和结构阻尼等因素对其振动响应特性的不同影响 ,对运用连续扫频法揭示出的振动时效动力学曲线呈现“几”字形规律做了进一步解释。分析表明 ,扫频曲线上共振峰的移动与形貌变化决定于构件结构刚性、结构阻尼和粘性阻尼等诸多因素变化的综合影响。以提高尺寸稳定性、降低和均化残余应力为目的的振动时效工艺 ,必须以此作为理论研究的出发点及其归宿。据此 ,作者对施振效果的现场即时定性判断的判据提出了新观点 ,认为 ,与振前扫频曲线相比 ,振后扫频曲线是否简洁而平滑 ,是振动时效工艺效果是否良好的重要标志之一。The influence of structural and viscous damping on vibratory response was investigated during vibratory stress relieving process (VSR) of complicated components. The '几' like dynamic curves obtained with continuous frequency scanning method during VSRP were also explained. It was shown that the structural changes of sympathetic vibration curves were dependent on comprehensive effectiveness of structural ngidity ,structural and viscous damping of the components. Because it is the ultimate purpose to realize dimensional stability, decrease or homogenize residual stress by VSR , a new criterion is then put forward to evaluate effectiveness of a vibratory stress relieving process. According to this criterion ,the smooth of the scanning curves is an evaluation on the effective ness of the results of VSR.

关 键 词：振动时效 效果 现场判断 判据 残余应力 阻尼 焊接构件 

分 类 号：TG156.92[金属学及工艺—热处理] TG407[金属学及工艺—金属学]