一种基于振型正交化的元素型模型修正方法

在振型正交化的一阶增量摄动格式基础上，综合元素型方法的灵活特点与矩阵型方法的公式简洁的优点，提出了内部元素联系矩阵这一概念，保持了刚度矩阵和质量矩阵的物理特性和内部元素的关联性的同时，有效的降低了求解增量方程组的欠定性，而且仅用前几阶试验频率和振型就能有效的修改系统的动力特性。最后分别用前两阶和前三阶试验频率及振型修正一个楼板结构和一个平面框架结构，表明了本方法的有效性和鲁棒性

Improved direct method for updating structural models based on eigenvectors orthogonality

A direct method based on orthogonality conditions of eigenvectors was improved for updating the mass and stiffness matrices of a structural model.Combining the merits of element method with those of matrix method,the concept of inner elements association matrix was presented to make the updated mass and stiffness matrices physically meaningful.Dynamic characteristics of the structures can be effectively modified using measured first few eigenmodes.The models of a five-story building and a plane frame struct...