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；
Then the eigenvalue problem of free vibration of annular sector plates is transformed into the eigenvalue problem of integral equation by using superposition theorem.
对大型储罐拱顶扇形板个别计算公式进行探讨，列举计算实例，提出看法。
In this article, the discussion of several equations commonly used in calculating spherical arc plate of vault in large storage tank was carried out.
由动力学的一般解，导出了扇形板和扇形环板在广义弹性简支和广义刚性滑动边界条件下自由振动的频率方程和振型；
From these dynamic solutions, frequency and mode shapes of sectorial plate and sectorial annular plate under boundary conditions of GSS and GRS are derived.
并得到了平衡问题的扇形板和扇形环板在两种边界条件下的位移、电势和磁势，应力、电位移和磁感应强度的三维精确解。
The three-dimensional exact solutions of the displacement, electric potential, magnetic potential, stress, electric displacement and magnetic induction of equilibrium problems are also obtained.
管束式热交换器。管子分布。管底座钻孔直径。导向扇形块和支承板。
Tubular heat exchangers; tube pitches, diameter of bores in tube sheets, baffles and support plates.
管束式热交换器。管子分布。管底座钻孔直径。导向扇形块和支承板。
Tubular heat exchangers; tube pitches, diameter of bores in tube sheets, baffles and support plates.
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