摘要
采用阻尼动力吸振器对中空轴系纵向多阶模态进行振动控制,结合子结构综合法和传递矩阵法,建立了多个阻尼动力吸振器-轴系耦合系统的动力学模型,并进行了动力学特性分析。考虑到各阶阻尼动力吸振器间的相互影响,以极小化目标频段范围内轴系位移响应的均方值为目标函数,对各阶阻尼动力吸振器的参数进行了联合优化;针对轴系中空特点,设计了阻尼动力吸振器的具体结构形式,利用有限元仿真对理论计算进行了验证。研究表明:轴系多模态控制时,在多阶阻尼动力吸振器作用下,目标频段范围内的轴系纵向共振峰得到抑制,频响曲线趋于平缓;对多阶吸振器进行联合优化后,吸振器的吸振效果得到进一步提升;提出的多阶吸振器设计方法能为连续系统多模态振动控制提供参考。
Damped dynamic vibration absorbers are adopted to attenuate the multi-mode longitudinal vibration of the hollow shafting.A dynamic model of the shafting with multiple dynamic vibration absorbers is established using the transfer matrix method combined with the substructure synthetic method.The dynamic behavior of the shafting under harmonic excitation is then analyzed.Considering the coupling behavior of the dynamic vibration absorbers,the parameters of the dynamic vibration absorbers are optimized,specifically relating to the mean square of the displacement response in a targeted frequency range as an object function.Based on the hollow characteristic of the shafting,a specific structure of the dynamic vibration absorber is designed,and finite element stimulation is used to verify the theoretical calculation.The research results showed that the resonance peak is strongly attenuated and that the frequency response function curve turned smooth when multiple dynamic vibration absorbers were attached to the shafting.Furthermore,the absorption effect is improved after an optimization of the dynamic vibration absorbers.
出处
《振动与冲击》
EI
CSCD
北大核心
2016年第12期96-101,109,共7页
Journal of Vibration and Shock
基金
江苏高校优势学科建设工程资助项目
中央高校基本科研业务费专项资金资助
江苏省普通高校研究生科研创新计划资助项目(KYLX_0242)
关键词
中空轴系
纵向振动
传递矩阵法
阻尼动力吸振器
hollow shafting
longitudinal vibration
transfer matrix method
dynamic vibration absorber
