吉林大学学报(工学版) ›› 2024, Vol. 54 ›› Issue (4): 902-916.doi: 10.13229/j.cnki.jdxbgxb.20221637
Shi-jun WANG1,2(),Guan-wei LUO2
摘要:
研究了一类含刚性及弹性复合约束的两自由度受迫振动系统,基于双参数协同仿真的数值计算方法,在关键参数激振力频率和两质块间间隙值构成的参数平面上获得了系统周期运动的模式类型和存在区域;揭示了无冲击振动和相邻基本周期冲击振动之间、相邻基本周期运动之间的转迁规律;分析了弹性约束刚度变化对系统周期运动模式类型和存在区域的影响。结果表明:无冲击振动和相邻基本周期运动之间、相邻基本周期运动之间都存在两类主要的转迁区域,包括舌状域和迟滞域;舌状域中包含具有规律性的亚谐运动,这些亚谐运动和相邻的基本周期运动在舌状域边界线附近构成迟滞域群;增大弹性约束处的刚度值,会使得双参数平面中低频率域的概周期运动、混沌运动存在域显著增大,并分割周期运动存在域。
中图分类号:
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