Amulti-mode solution is presented in the form of generalized double Fourier series with time-dependentcoefficients determined by the method of harmonic balance for undamped free vibrations.

 
  • 给出了以广义双富里哀级数表示的无阻尼自由振动下的多模态解,其中与时间相关的系数由谐波平衡法确定。
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