Then the eigenvalue problem of free vibration of annular sector plates is transformed into the eigenvalue problem of integral equation by using superposition theorem.

然后由叠加原理将环扇形板的自由振动问题转化为积分方程特征值问题；

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Then the eigenvalue problem of free vibration of annular sector plates is transformed into the eigenvalue problem of integral equation by using superposition theorem.

然后由叠加原理将环扇形板的自由振动问题转化为积分方程特征值问题；

youdao