法兰螺栓联接状态空间模型及其接触参数辨识  

The State Space Model of Flange Bolted-Joints Structure and Its Contact Parameter Identification

作　　者：田美子[1] 赵登峰[1] 曾国英[1] 

机构地区：[1]西南科技大学制造学院,四川绵阳621010

出　　处：《机床与液压》2013年第3期41-43,共3页Machine Tool & Hydraulics

基　　金：国家自然科学基金;中国工程物理研究院联合基金资助项目(10876034)

摘　　要：从系统的状态方程出发,建立了法兰螺栓联接结构的状态空间模型,并且对其接触参数进行辨识。基于现代控制理论和有限元理论,将结合面简化为一系列包含接触刚度、接触阻尼的参数单元,建立了包含结合面的法兰螺栓联接实验模型的状态空间模型。根据对螺栓联接结构进行模态试验分析获得的前3阶固有频率,结合所建立的接触刚度和阻尼参数优化识别目标函数,对不同螺栓预紧力矩下的接触刚度和阻尼参数进行了优化识别,从而为下一步的理论计算与实际应用奠定了基础。Based on modern control theory and the finite element method, the joint surfaces was simplified into a series of con- centrated contact stiffness and damping elements, and the state space model of the flange bolted-joints structure model was established. Based on the first three orders nature frequency obtained by experiment, combined with the optimized identification objective function, the contact parameters were identified. The contact stiffness and damping of the joint surfaces under different preload of bolts were ob- tained. It lays a foundation for the theory calculation and practical application.

关 键 词：螺栓联接 参数识别 状态空间模型 法兰 

分 类 号：TH131.3[机械工程—机械制造及自动化]