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采用推广的旋转平面波近似对一维非线性Klein-Gordon/Fermi-Pasta-Ulam混合原子链的运动方程进行简化，数值求解得到该系统中存在的离散呼吸子解.研究了系统中各非线性参数对该振动模的直流、一阶简谐项和二阶简谐项三个分量的对称性的影响以及对系统中局域模的影响.
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关键词:
- Klein-Gordon/Fermi-Pasta-Ulam混合原子链 /
- 推广的旋转平面波近似 /
- 离散呼吸子 /
- 对称性
The possible discrete breathers are obtained numerically in the system of one-dimensional mixed Klein-Gordon/Fermi-Pasta-Ulam chain on the basis of simplified motion equations by using extended rotating plane wave approximation. Furthermore，the effect of each nonlinear parameter on the static，first-order harmonic and second-order harmonic components of the discrete breathers is investigated.-
Keywords:
- mixed Klein-Gordon/Fermi-Pasta-Ulam chain /
- extended rotating plane wave approximation /
- discrete breathers /
- symmetry
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