本文采用谐波平衡法，定量地解释了机翼颤振主动抑制风洞试验中出现的极限环现象。
The phenomena "limit cycle" occurred in wind tunnel test for active flutter suppression of a wing model are numerically explained using Harmonic Balance Method.
通过极限平衡分析计算，定量地研究了缓倾角边坡坡顶极限承载力和陡倾角边坡坡面极限边界线。
By moans of limit analysis and numerical computation, ultimate bearing capacity and limit sideline of slopes are studied quantitatively.
建立了采样点均匀分布情况下，圆度误差测量采样点数量与测量极限误差之间的定量关系数学模型。
Under the situation of even distribution of fitting nodes, a mathematic model is established by means of the relation between the number of fitting nodes and the limit error of measurement.
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