摘要
在建立复杂结构的有限元模型时,对实际结构的简化直接影响到计算结果的准确性,对有限元模型进行修正十分必要。引入试验和初始有限元模型得到的频响函数的相关准则,利用频响函数相关系数灵敏度分析技术,用于对浮筏舱段结构有限元模型进行修正,修正后计算和试验的频响函数基本一致,结果表明:该方法可用于对复杂结构有限元模型的修正。
In establishing the finite element model of large damping complex structures, the simplification of actual structure will influence the accuracy of the computation results. It is necessary to update the finite element model. The concept of frequency response function （FRF） correlation coefficient from both the experiment and computation are introduced. By utilizing the sensitivity analysis of FRF correlation coefficient, the finite element model of a ship structure with vibration isolation system is updated. The FRF from computation is in coincidence with that from experiments after updating the original finite element model. Results indicate that the method can be used to update large damping complex structures.
出处
《江苏科技大学学报（自然科学版）》
CAS
北大核心
2005年第6期75-78,共4页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
基金
江苏省优秀青年教师基金资助课题
关键词
有限元
模型修正
频响函数
灵敏度
finite element
model updating
frequency response function
sensitivity
