基于有限元法的转动心轴动态可靠性分析
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摘要
以某转动心轴为研究对象,利用有限元软件ANSYS对其进行动态特性及可靠性分析。通过模态分析可以得出该转动心轴在约束状态下的前八阶固有频率,通过谐响应分析可得第一阶模态是对结构动态特性影响最大的模态。灵敏度及可靠性分析结果表明对结构动态特性影响较大的材料特性及尺寸参数有:l_2、d_2、弹性模量及密度,该转动心轴的动态可靠度为99.2%。
Taking a mandrel as the research object, the dynamic characteristics and reliability were analyzed by using the finite element software ANSYS. The first eighth natural frequencies of the rotating spindle were obtained through modal analysis. Through the harmonic response analysis, it can be concluded that the first mode has the greatest influence on the dynamic characteristics of the structure. The sensitivity and reliability analysis results show that the material characteristics and size parameters which have great influence on the dynamic characteristics of the structure are l_2, d_2, and the elastic modulus and density; and the dynamic reliability of the rotating spindle is 99.2%.
Taking a mandrel as the research object, the dynamic characteristics and reliability were analyzed by using the finite element software ANSYS. The first eighth natural frequencies of the rotating spindle were obtained through modal analysis. Through the harmonic response analysis, it can be concluded that the first mode has the greatest influence on the dynamic characteristics of the structure. The sensitivity and reliability analysis results show that the material characteristics and size parameters which have great influence on the dynamic characteristics of the structure are l_2, d_2, and the elastic modulus and density; and the dynamic reliability of the rotating spindle is 99.2%.
引文
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[3] 李晓茸.矿用防爆无轨胶轮车车架动态特性分析[J].煤矿机械,2018,39(10):81-84.
[4] 王科.轻型载货汽车前轴的有限元动态特性分析[J].机械研究与应用,2015,28(3):41-42.
[5] 丁腾飞,李波,王锡霖,等.某型立式加工中心结构动态特性研究[J].机床与液压,2018,46(17):146-150.
[6] 刘盼中.基于ANSYS Workbench 的粉末精整装备机身的模态分析[J].机械设计,2018,35(S1):330-333.
[7] 俞建卫,潘俊锋,尤涛,等.重负荷往复摩擦试验机结构动态特性分析[J].机械设计与制造,2014(11):155-157.
[8] Lee J H,Lee B S.Modal analysis of carbon nanotubes and nanocones using FEM[J].Computational Materials Science, 2012(51):30-42.
[9] 张朝晖.ANSYS 12.0结构分析工程应用实例解析[M].第3版.北京:机械工业出版社,2010.