混凝土搅拌棒振子的动力特性分析

A Study on Dynamic Characteristics of Vibrators in Concrete Stirring Bars

以混凝土搅拌棒为研究对象 ,建立了一个理想的力学模型———受集中质量作用下的自由 自由梁 ,导出其运动微分方程 ,并利用微分方程的解、边界条件及集中质量处的连续条件得到了矩阵形式的频率方程。最后探讨了振子在搅拌棒上不同位置发生共振时 ,振子的偏心距。

A mechanical model for concrete stirring bars is proposed and its fourth-order partial differential equation is derived. The bars are idealized to free-free beams with lumped mass. The corresponding frequency equation is also derived from the solutions to the differential equation, the boundary conditions and continuous condition at the lumped mass. The dynamic characteristics of the stirring bars are obtained. The relationship among the position and eccentric distance of the vibrator, the dimension of the stirring bar and the vibrating frequency is discussed.