Using perturbation method and multiple scales method,analyzed the free vibration、main resonance and secondary resonance. The research result on the free vibration shows that the relationship between the plate frequency、amplitude、length-width ratio and force is very close.
采用摄动法和多尺度法对板的自由振动、主共振及次共振进行了分析.对自由振动的研究结果表明:薄板非线性振动的频率、振幅、长宽比、激励力振幅四者之间的关系非常密切,温度对板的振动影响不大。
参考来源 - 钢筋混凝土板在热—机作用下的非线性振动·2,447,543篇论文数据，部分数据来源于NoteExpress
弦理论最初是为了解释强相互作用力，也就是二次共振模型（1969）。
The theory has its origins in an effort to understand the strong force, the dual resonance model (1969).
我们知道对大多数人来说，他们的共振频率介于每分钟4.5次至7.5次呼吸之间。
We know that for most people their resonant frequency is between 7.5 and 4.5 breaths per minute.
那请恕我直言：你想要一个给这三位专家推荐，一次核磁共振检查，还有你在电视上看到的治疗和一个小时的访问。
So let me get this straight: you want a referral to three specialists, an MRI, the medication you saw on TV, and an extra hour for this visit.
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