摘要
本文针对加工中心立柱床身结合面,提出了一种适用于复杂模型的结合面参数识别方法。主要工作包括以下几部分: ⅰ)运用结合面元的方法建立了结合面动力学模型。ⅱ)应用有限元模型降阶修改法建立了立柱床身结构的低阶高精度动力学模型。ⅲ)提出了一种利用可测传递函数逆阵建立目标函数的方法,避免了共振峰附近机械阻抗矩阵病态的问题。ⅳ)在JCS—018加工中心立柱床身模型上,识别了刮/刮6～8点/cm^2在四种不同预紧力下结合面参数的数值。
In this paper, a method of identification of the joint dynamic parameters of complex structural model is proposed, which involves establishment of the joint dynamic model by using method of joint element, establishment of the dynamic model of column and bed with Less order and higher accuracy by modification of the original finite element model, establishment of the cost function by using measurable transfer function and identification of the dynamic parameter of the joint with 6锝? contact spot per cm^2 under different preloads on the model of machining center Type JCS-018.
出处
《振动与冲击》
EI
CSCD
北大核心
1992年第3期13-19,6,共8页
Journal of Vibration and Shock
