【摘要】 通过建立直线型预应力混凝土等直梁强迫振动的运动微分方程,分析了等直梁在预应力作用下的横向振动问题,将运动微分方程解耦后得到直梁在预应力作用下自振频率的精确解,再应用Garlerkin法计算出直线型预应力等直梁在预应力作用下的一阶自振频率近似解,并与其精确解进行了比较分析,以期为类似预应力混凝土梁的结构设计提供参考。更多还原

【Abstract】 The differential equations of a straight line prestressed concrete beam under forced vibration are established.The transversal vibration behaviors of the prestressed concrete beam are analyzed.The exact solution of natural vibration frequency of the beam subjected to prestressing force and the dynamic behaviors of the beam are obtained by decoupling the differential equations.A steps the approximate solutions of natural vibration frequency under prestressed force are obtained through Garlerkin method,and the comparative analysis with the exact solution are also gived,with a view to provide certain reference for the structural design of similar prestress concrete beam.更多还原