The objective of this paper is to study the effects of three dimensional constraints on fatigue crack growth under aircraft spectrum loading.
研究裂纹端部三维应力约束、塑性约束和位移约束等对谱载疲劳裂纹扩展的影响。
In this model, the plastic zone induced by the overload is affected by the three-dimensional constraints, and it leads to significant influence on the crack closure and growth rate.
在此模型中，裂尖的三维约束状态显著影响超载塑性区，从而显著影响裂纹的闭合和扩展速率。
Air route planning is a three-dimensional planning problem, with wide range, many objects and many constraints.
飞行航路规划是一个大范围多目标多约束的三维规划问题。
The two-dimensional layout optimization problem is studied. A semi-infinite optimization model with performance constraints is presented.
研究了二维布局优化问题，建立了具有性能约束的二维布局半无限优化模型。
It is expected to solve the problem about accurate, quick and reasonable design of three-dimensional well-path subject to various constraints.
准确、快速、合理地设计多约条件下的三维井眼轨道是人们期待解决的问题。
Then, the three-dimensional rectangular objects of different sizes were placed to the layout space under the constraints.
然后，装入满足约束条件的最优货物块，完成不同大小三维矩形货物的装载布局。
Then, the three-dimensional rectangular objects of different sizes were placed to the layout space under the constraints.
然后，装入满足约束条件的最优货物块，完成不同大小三维矩形货物的装载布局。
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