噪声与振动控制2018，Vol.38Issue(3)：31-35,5.DOI:10.3969/j.issn.1006-1355.2018.03.006
动力学有限元模型的复模态评估
Complex Modal Evaluation of Dynamics Finite Element Models
摘要
Abstract
Frequency and MAC are often used for the evaluation of the finite element models. The result of the evaluation is effective for the structures with small damping or without damping. However, there are phase differences for each mode of the damping structure with different DOFs. In this case, the evaluation in real number domain will produce errors, and it is difficult to evaluate the model using conventional evaluation methods. In this paper, based on the complex modal theory, the finite element model is evaluated from three aspects of complex frequency, complex amplitude and phase value. According to the requirement of response analysis, the evaluation criteria and weight sets are established, and the parameter that can comprehensively measure the accuracy of the finite element model is presented. Results of an example show that this method can effectively predict the accuracy of the model response. It has an important engineering practical value for the structural dynamics modeling.关键词
振动与波/结构动力学/模型评估/复模态/有限元模型/阻尼结构Key words
vibration and wave/structural dynamics/model evaluation/complex modal/finite element model/damping structure分类
数理科学引用本文复制引用
余好文,王轲..动力学有限元模型的复模态评估[J].噪声与振动控制,2018,38(3):31-35,5.基金项目
航空科学基金资助项目(20141552014) （20141552014）
江苏优势学科建设工程资助项目 （）
