摘要
本文提出了进行复模态参数研究的特征曲线法。针对一个阻尼结构系统,首先利用复模态参数所满足的特征方程,在设计参数的区间内进行采样,然后利用三次样条插值来绘制设计参数所属区间内的复频率及复模态的拟合曲线,再利用复频率和复模态的一阶灵敏度算法公式同样在设计参数的所属区间内采样并绘制它们的一阶灵敏度拟合曲线,最后通过这些曲线图直观地分析阻尼结构复模态参数的动态变化的趋势及程度。
This paper come up with characteristic curve method,which was used to learn complex mode parameter.Aiming at damping structure system,we firstly use complex mode parameter suitable for the characteristic equation,sampling in the interval of the design parameter.Next use the spline interpolation of complex frequency and complex mode to draw fitting curve which belongs to design parameter's interval.Then use first-order sensitivity algorithm formula of complex frequency and complex mode to draw first-order sensitivity fitting curve belonging to design parameter's interval.At last,analyze damping structure complex mode parameter's tendency and degree of dynamic change intuitively by these curves.
出处
《信息技术与信息化》
2017年第12期64-74,共11页
Information Technology and Informatization
基金
吉林省自然科学基金资助项目(201215115)
吉林省教育厅“十二五”科学技术研究项目(2014336)
关键词
密频结构
复模态参数
灵敏度
三次样条插值
拟合曲线
closed frequency structure
complex mode parameter
sensitivity
spline interpolation
fitting curve
