The frequencies and vibration modes of structures are analyzed with pulsating method and structural stiffness is identified with modified simplex method, which is presented by authors.
应用脉动法测到的信号分析结构的固有频率和振型，利用作者提出的改进的单纯形法来识别结构刚度。
2
The modified fatigue stiffness calculation of corroded reinforcement concrete beams was introduced in this study.
在实验基础上，本文提出了锈蚀钢筋混凝土梁疲劳刚度修正计算公式。
3
The soil reaction matrix is added to beam element stiffness matrix, and modified beam element stiffness matrix is formed.