摘要
连续梁桥是公路桥梁工程中常用的一种桥型。利用达朗贝尔原理,建立移动荷载序列作用下的连续梁偏微分运动方程。通过振型叠加法和伽辽金积分,将偏微分方程转化为常微分方程。利用ANSYS软件的模态分析功能,计算出连续梁的固有频率及振型数据,利用拟合振型的方法拟合出振型函数,结合推到方程,利用MATLAB编程求解。讨论了荷载移动速度、荷载间距对动力响应影响的变化规律。其结果对于多跨连续桥梁的动态设计、动力性能评估以及振动的控制具有一定的实际意义。
Multi-span continuous bridge is a common form in highway bridge construction.Using d＇ Alembel principle,the dynamics equation is established.Using the Garlerkin integration method and model superposition principle,the dynamics equation is conformed to ordinary differential form from partial differential form.Using software ANSYS,the model values are obtained,than these values are used solving dynamics equation in MALAB program.Considering the different speed or different two forces distance,the Varied regularity of response of deflection is obtained.the results for the dynamic multi-span continuous bridge design,dynamic performance evaluation and control of vibration of a certain practical significance.
出处
《公路工程》
2011年第3期19-21,29,共4页
Highway Engineering
基金
湖南省教育厅资助项目(08C115)
关键词
连续梁
有限元
模态分析
动态响应
multi-span continuous girder
finite element
dynamic response
modal analysis
