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实验研究了在垂直振动激励下,非线性最近邻耦合的一维单摆链(晶格模型)中的包络孤波和缺陷的相互作用。模型中摆点的质量、耦合情况都保持均匀,而在摆链的中间存在一个摆点,具有摆长缺陷。实验表明:当驱动频率高于两倍本振频率时,长缺陷排斥呼吸子、吸引扭结;而短缺陷则吸引呼吸子、排斥扭结。当驱动频率低于两倍本振频率时,长缺陷吸引呼吸子、排斥扭结;短缺陷排斥呼吸子、吸引扭结。这些结果证实了已有的连续化近似模型的数值结果。
The interaction between the envelope solitons and the defects in a one-dimensional mono-pendulous chain (lattice model) of nonlinear nearest neighbor coupling is investigated experimentally under vertical vibration excitation. In the model, the mass of the pendulum points and the coupling are kept uniform, while there is a peaking point in the middle of the pendulum chain, which has the flaw in length and length. Experiments show that when the driving frequency is higher than twice the LO frequency, the long defect excludes the breathing and attracts the kink, while the short defect attracts the breathing and repels the kink. When the drive frequency is lower than twice the LO frequency, the long defect attracts the respirator and repels the kink; the short defect repels the respiration and attracts the kink. These results confirm the numerical results of the existing continuous approximation model.