摘要
为研究黏弹性减振器的非线性阻尼缓冲性能,根据其结构特点和非线性特征,建立单自由度分段非对称非线性振动模型,并由平均法推导出系统固有频率共振区附近的幅频特性方程。以安装在某300kW履式拖拉机的黏弹性减振器为应用对象进行研究,分析系统在固有频率共振区附近的非线性特性和阻尼减振性能。讨论了幅频特性分别和激励幅值、刚度系数、阻尼系数、质量之间的关系,并提出改善系统减振性能的建议。
In order to investgate the damping vloratlon reducton shock absorber, a single DOF model of subsection non--symmetrical nonlinear oscillation was built ac- cording to its structural feature and nonlinear behavior. The approximate analytic solution of move ment system was derived in the natuaral frequency section, based on the averaging method. Then the nonlinear vibration characteristic and the performance of vibration damping reduction of absorber were studied in the natuaral frequency resonance region, taking a 300kW tracked tractor mounted with for instance. The relationship of the amplitude--frequency charaterstics and system parameters,including the excitation amplitude,the stiffness and damping coefficients of viscoelastic shock absorber and the supported mass, were numerically analyzed.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2012年第14期1651-1656,共6页
China Mechanical Engineering
基金
高等学校博士学科点专项科研基金资助项目(200801090001)
山西省回国留学人员科研资助项目(2012-073)
关键词
减振器
黏弹性
阻尼缓冲
非线性的
shock absorber
viscoelasticity
damping vibration reduction
nonlinear
