摘要
本文将平板网架简化为夹层板,运用变分原理推导出两向正交正放类网架结构的运动方程,并求出简支矩形网架自由振动的固有频率的公式,通过数值计算和拟板法结果做了比较,结果表明平板网架结构承受动荷的性能很好。
This paper simplifies plane truss as sadwich plate.The motion equation of two—way orthogonal lattice grid and the formula of the inherent frequency of free vibration of plane rectangular truss are derived by means of the variational principle.Compared with the result of pseudo—plate method through numerical calculation,it shows that the plane truss perfoms satisfactorily when it dears a dynamic load.
出处
《山东建筑大学学报》
1990年第4期49-53,共5页
Journal of Shandong Jianzhu University
关键词
网架结构
自由振动
变分原理
剪切效应
固有频率
plane truss
free vibration
variational principles
shear effect
inherent frequency
