南昌工程学院学报
南昌工程學院學報
남창공정학원학보
JOURNAL OF NANCHANG INSTITUTE OF TECHNOLOGY
2011年
3期
27-30
,共4页
车桥耦合%非线性振动%龙格—库塔法%冲击系数
車橋耦閤%非線性振動%龍格—庫塔法%遲擊繫數
차교우합%비선성진동%룡격—고탑법%충격계수
vehicle-bridge coupled interaction%nonlinear vibration%Runge-Kutta method%impact coefficient
应用哈密尔顿能量原理和欧拉—贝努利梁假设,考虑梁的几何非线性影响,推导出简支梁在四分之一车辆模型下的车桥耦合非线性振动方程.采用伽辽金法和龙格—库塔法求解方程,研究了计入几何非线性因素后车速、桥梁参数对简支梁桥冲击系数的影响,其结果为改进我国公路桥涵设计规范中冲击系数的计算提供了参考.
應用哈密爾頓能量原理和歐拉—貝努利樑假設,攷慮樑的幾何非線性影響,推導齣簡支樑在四分之一車輛模型下的車橋耦閤非線性振動方程.採用伽遼金法和龍格—庫塔法求解方程,研究瞭計入幾何非線性因素後車速、橋樑參數對簡支樑橋遲擊繫數的影響,其結果為改進我國公路橋涵設計規範中遲擊繫數的計算提供瞭參攷.
응용합밀이돈능량원리화구랍—패노리량가설,고필량적궤하비선성영향,추도출간지량재사분지일차량모형하적차교우합비선성진동방정.채용가료금법화룡격—고탑법구해방정,연구료계입궤하비선성인소후차속、교량삼수대간지량교충격계수적영향,기결과위개진아국공로교함설계규범중충격계수적계산제공료삼고.
Based on the Hamilton principle and the hypothesis of Euler-Bernoulli beam,the systematic nonlinear vibration equations on vehicle-bridge coupled interaction were derived by using two free degree vehicle models.The equations were solved by using Galerkin and Runge-Kutta methods.The influence of the vehicle speed and bridge parameters on impact coefficients of the simply supported beam bridge was discussed.The results provide reference for improving the impact factor calculation in the bridge design code of China.
