分析了一类薄板系统的局部分叉以及双Hopf分叉等问题.选取一类受到参数激励和外激励共同作用的薄板作为研究模型,在其非线性动力学方程的基础之上,通过多尺度法进行计算,得到这类薄板系统在直角坐标系和极坐标系下的两种平均方程;通过数值约化取得薄板系统对应的分叉响应方程,借助非线性动力系统中的奇点分析理论研究了分叉响应方程的复杂分叉现象;通过对薄板系统存在的不同定常解的分析,获得薄板系统在选定参数平面上的局部分叉集.
The local bifurcation of a thin plate is studied, which being under the combined actions of parametric excitation and external excitation. Using the multiple scales method, two types of equations in different coordinates and the bifurcation response equation are got about the thin plate. Using the theory of singularity, the characteristic of the bifurcation equation is achieved. In the end of the paper, the local bifurcation set of the above system in the parameter plane is obtained.