摘要
由于钢丝间存在着干摩擦作用,钢丝绳减振器具有明显的非线性迟滞阻尼。现有文献中钢丝绳减振器迟滞模型的参数识别大都是基于初始零变形情况下给出的。实际上,在隔振系统中减振器是在承载作用下,此时已有一定的初始变形。钢丝绳减振器具有强非线性,相对于不同初始变形的迟滞曲线中的参数是不同的。为此,基于钢丝绳减振器额定荷载下的实验迟滞曲线,考虑高阶刚度和可能出现的多种阻尼成分,通过参数识别给出钢丝绳减振器额定荷载下的准静态非对称迟滞模型。结果表明:理论回线与试验回线吻合,该模型能很好地反映钢丝绳减振器的准静态非线性刚度和阻尼特性。
The wire-rope isolator has obvious nonlinear hysteretic characteristics because of the dry friction among the wires. In the literatures, most of the parameter identification of hysteresis model was based on the initial deformation-free assumption. In fact, there must exist some initial deformations in the wire-rope isolator since it is loaded. Due to the strong nonlinearity of the wire-rope isolator, its hysteresis parameters depend on initial deformations. In this paper, according to the experimental hysteresis curve of the isolator with rated load, and considering the high- order stiffness and the varying damping, a quasi-static asymmetrical hysteresis model was presented through the parameter identification. The results show that the hysteresis of the theoretical model is in consistent with that from the experiment. Therefore, the model can well reflect the quasi-static non-linear stiffness and damping characteristics of wire-rope isolators.
出处
《噪声与振动控制》
CSCD
2013年第5期170-172,共3页
Noise and Vibration Control
基金
中央高校基本科研业务费专项资金(同济大学)
关键词
振动与波
钢丝绳减振器
准静态
非对称迟滞模型
参数识别
vibration and wave
wire rope isolator
quasi-static
asymmetric hysteresis model
parameter identification
