摘要
针对工程实际中柔性基础的隔振问题,建立了机器-非线性隔振器-柔性基础组成的隔振系统理论模型,其中,用四边简支矩形薄板模拟弹性安装基础。运用谐波平衡法和Newton迭代法对系统在简谐激励下的动态响应进行了近似求解,并通过计算分析了主谐波分量对于基础的振动功率流输入,讨论了隔振器的非线性阻尼和刚度特性对系统隔振效果的影响。研究表明,在低频段,较小的阻尼非线性特征参数和较大的刚度非线性特征参数利于隔振;在高频段,较大的非线性特征参数具有较好的隔振性能。
Aiming at the vibration isolation problems of flexible base in practical projects, a theoretical model of a vibration isolation system, which is composed of machine-nonlinear isolator-flexible base, is established, wherein, the elastic installation base is simulated by a rectangular thin plate simply supported on four edges. Approximate solutions to dynamic response of the system under harmonic excitations are carried out with the harmonic balance method and the Newton iterative method. The vibration power flow transmitted to the base from main harmonic components is calculated and the effects of nonlinear damper and rigid characteristic of the vibration isolator on system vibration performance are discussed. The results show that the smaller nonlinear characteristic damping parameters of the vibrator and larger nonlinear characteristic rigidity parameters are advantageous to vibration isolation in low frequency; while larger nonlinear characteristic parameters are advantageous to achieve better vibration isolation performance in high frequency.
出处
《振动工程学报》
EI
CSCD
北大核心
2008年第4期394-397,共4页
Journal of Vibration Engineering
基金
山东省博士基金资助项目(02BS065)
关键词
隔振
非线性特征参数
功率流
柔性基础
vibration isolation
nonlinear characteristic parameters
power flow
flexible base
作者简介
马业忠（1983-），男，硕士研究生。电话：（0531）88396712；E-mail：mayezhong@163．com
