金刚石圆锯片频率可靠性分析  

Vibration reliability analysis of diamond circular saw blade

作　　者：袁哲[1] 曹瑞元[1] 盖瑞波[1] 

机构地区：[1]沈阳建筑大学交通与机械学院,沈阳110168

出　　处：《现代制造工程》2014年第1期1-4,130,共5页Modern Manufacturing Engineering

基　　金：国家自然科学基金资助项目(51105258);住房和城乡建设部研究开发项目(2012-K3-41)

摘　　要：为提高金刚石圆锯片的锯切性能,降低其工作时的振动,防止圆锯片共振失效,根据随机结构的固有频率与激振频率差的绝对值不超过规定值的关系准则,定义了金刚石圆锯片随机结构振动问题的可靠度模型,提出了避免圆锯片共振的频率可靠性分析方法,并建立圆锯片的有限元模型,利用概率有限元方法计算了圆锯片的频率可靠度。同时通过锤击振动试验法测得一组金刚石圆锯片的固有频率,得到固有频率的概率分布,并进行可靠度计算。通过对比概率有限元法计算结果和锤击振动试验法计算结果可知,两者基本吻合,说明概率有限元计算结果真实有效,可以较准确地对圆锯片进行可靠度评价。In order to improve the cutting performance of diamond circular saw blade, reduce its working vibration, and avoid the saw blade resonance. The reliability model of diamond circular saw blade vibration with random structure is defined on the basis of the relation that the difference between nature frequency and driving frequency. The frequency reliability analysis method for avoi- ding the saw blade resonant is carried out. The probabilistic finite element method is used to analyse the structure reliability and reliability sensitivity of the saw blade. The probability distribution of natural frequencies is obtained by modal test of a group of diamond saw blade and the reliability calculation is carried out. It is mostly equal by comparing the probability finite element calculation resuhs and testing results. So the probability finite element model can be more accurate to evaluate reliability of saw blade.

关 键 词：固有频率 频率可靠性 灵敏度 金刚石圆锯片 

分 类 号：TH117[机械工程—机械设计及理论]