大跨桥梁非线性颤振分析的数值积分法

A Numerical Integration Method for Analyzing the Nonlinear Flutter of Long-span Bridges

基于脉冲响应函数的卷积积分 ,将作用在桥梁主梁上的自激力表达为时域形式。在此基础上 ,利用 Newmark- β逐步积分格式建立了大跨桥梁结构非线性颤振分析的数值积分法。

The self-excited loads acted on the bridge deck are expressed in the time domain in the terms of convolution integrals with impulse response func ions type kernels.Then,a numerical integration method for nonlinear flutter analysis of long span bridges is established with the Newmark β integration algorithm.