由于膜材只能受拉不能受压以及大变形小应变的特点，其设计中动力响应分析是难点之一。
Dynamic response analysis of tensioned cable and membrane structure is one of difficulties of structure design because of its tensioned-only, large deformation and small strain property.
由于大直径桩的荷载传递机理和变形特征与普通中、小直径桩存在着明显的差异，因此，用中、小直径桩计算理论来分析大直径桩是不合适的。
It is unsuitable to use the theory of common small-medium piles to analyze LDPs, because there are distinguished differences in the mechanism of load transfer and deformation features between them.
最后通过近似分析，给出了在小变形中等转动情况下转动张量和伸长张量的近似表示。
Finally, through the approximate analysis, the approximate representation on the rotation tensor and stretch tensor is proposed.
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