摘要
基于FRF的子结构综合法求解整体频响过程中,子结构间连接处的频响数据对于计算结果有着重要影响,而连接处的频响数据与子结构界面点处的频响数据关系密切.由于子结构连接处的复杂性,考虑到转角自由度处的频响信息难以通过实验获取,因此针对多自由度连接情形,提出了一种利用容易测得的位移频响数据,求解子结构界面点处转角自由度频响数据的计算方法,从而得到了子结构综合中界面点的完整频响,并以仿真算例验证了方法的可行性.
During the process of obtaining the overall frequency response based on the method of FRE suostructure synthesis, the frequency response of the joint between substructures, which is significant influenced by the frequency response of interface degree of freedom, has great impact on the result. Considering the experimental difficulty in obtaining the frequency of response of interface degree of freedom due to the complexity of the joint between substructures, this work proposed a method that can be employed in computing the interface contains mult？degree of freedom. By using the frequency response of degrees that is more easier to get through the experiments, this method illustrates how to calculate the rotational frequency response, thus obtaining the overall information of the interface degree of freedom that is required in the FRF substructure synthesis. And several numerical examples validate the effectiveness of this method.
出处
《复旦学报（自然科学版）》
CAS
CSCD
北大核心
2013年第5期646-652,660,共8页
Journal of Fudan University：Natural Science
基金
国家自然科学基金(11172067)资助
关键词
子结构综合法
界面点自由度
转角自由度
频响函数
有限元分析
substructure synthesis method
interface degree of freedom
rotational degree of freedom
frequency response function
hnite element anaiysis
作者简介
陈凯（1990-），男，硕士研究生；
陈力奋（1966-），女，副教授，通讯联系人，E-mail：lfchen2@fuda.edu．cn
