动态识别分区不同的材料弹性模量  

Identification of the Elastic Modulus in the Different Areas Using Dynamic Method

作　　者：李芳[1] 翁晓红[1] 佘翊妮[1] 

机构地区：[1]浙江工业大学机械制造及自动化省部共建教育部重点实验室,浙江杭州310032

出　　处：《应用基础与工程科学学报》2007年第2期203-208,共6页Journal of Basic Science and Engineering

摘　　要：纸质喇叭盆体和盆边的弹性模量是不同的,喇叭整体厚度比较薄且厚度不均等,所以通常的静态测试方法并不合适.利用动态测试获取试样的固有频率,然后结合有限元分析和数值优化方法识别弹性模量.算例表明这是一种简捷、快速、准确的方法.The elastic modulus of the loudspeaker cone and rim are different, and thickness of the loudspeaker is thin and non-uniformity, so conventional static measuring method isn＇ t appropriate. By applying dynamic measuring method we can get the natural frequencies, which are combined with the finite element method and numerical optimization method. In this way, elastic modules can be identified. The examples show that dynamic identification is a simple, quick and accurate method.

关 键 词：有限元 动态识别 固有频率 弹性模量 纸质材料 

分 类 号：O339[理学—一般力学与力学基础]