最后，应用最小势能原理确定位移幅值的闭合解。
Finally, a closed form solution of additional displacements is obtained by the principle of minimum potential energy.
其次在一定假设下，对产品进行定价，获得定价闭合解；
Secondly, under the certain assumption, the closed form solution of the product is obtained.
一般闭合解是一种数学上严密的解法，它不需要初始值和迭代。
The closed form general solution is a rigorous solution in mathematics. It does not require initial values and iterations.
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