Compared to finite differencing method, AD can calculate gradients and Hessian matrix in a much faster way without truncation error.
在计算函数梯度、海森矩阵时,自动微分方法和有限差分相比在计算时间代价方面具有巨大的优势,且无截断误差。
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Displacement response to aerodynamic excitation is calculated based on the modal parameters and stress response is obtained by finite differencing of the displacement.
然后根据模态参数计算叶片对气动激励的位移响应，并通过对位移响应的有限差分计算应力响应。
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