Moreover, a formula for calculating double limit cycle bifurcation is derived. Finally, the complete bifurcation diagrams and phase portraits are obtained.
给出了完整的分支图和各区域上的相轨线结构。结果表明，非对称项引起二重极限环分支和分支曲线的复杂性。
Both single and double stable limit cycle flutter states are found.
风洞吹风中测出了单稳定极限环、双稳定极限环颤振的情况。
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