具有开口截面主梁的斜拉桥动力建模研究

开口薄壁断面是目前斜拉桥主梁的一种常用形式,本文根据薄壁杆件的特点,采用能量变分方法建立了能够考虑斜拉桥横向,竖向,纵向,弯扭耦合与纵向翘曲的空间梁单元的刚度矩阵和质量矩阵。通过对ANSYS进行二次开发,实现了上述功能,并通过算例对比了本文算法和常规算法的差别。

The study of dynamical model of cable-stayed bridge with open and shell Of beam section

The open and shell-bar beam section is often used by modern cable-stayed bridge. Considered traversal, longitudinal and bending deformations as well as the coupling of bending and twist, longitudinal warping, explicit formulae of element stiffness and mass matrix, are derived by energy variation principle based on shell-bar structure characteristics. The recognition of beam-modal become difficult as the division of cable ,so the modal of beam is recognized by energy of modal of every structure in different directions. Realizing these functions by reusing ANSYS.