中国物理B ›› 2008, Vol. 17 ›› Issue (11): 4123-4128.doi: 10.1088/1674-1056/17/11/027
张琪昌, 王 炜, 刘富豪
Zhang Qi-Chang (张琪昌), Wang Wei (王 炜), Liu Fu-Hao (刘富豪)
摘要: The static bifurcation of the parametrically excited strongly nonlinear oscillator is studied. We consider the averaged equations of a system subject to Duffing--van der Pol and quintic strong nonlinearity by introducing the undetermined fundamental frequency into the computation in the complex normal form. To discuss the static bifurcation, the bifurcation problem is described as a 3-codimensional unfolding with $Z_{2}$ symmetry on the basis of singularity theory. The transition set and bifurcation diagrams for the singularity are presented, while the stability of the zero solution is studied by using the eigenvalues in various parameter regions.
中图分类号: (Nonlinear dynamics and chaos)