The irregular distribution of the wave load along the erect riser makes the computation of equivalent wave nodal force difficult when applying Finite Element Method to analyze risers strength.
波浪荷载沿垂直立管的分布是不规则的，这对工程中用有限元法分析立管强度进行等效波浪结点力的计算带来困难。
Furthermore, the contact finite element was adopted to gain the accurate distribution of strength in the subassembly with the interference between the axle hole and the shaft.
另外，还采用接触单元对孔轴过盈配合联接组件进行了有限元分析，得到更为精确的强度分布。
Through a lot of experiments, an important element that affect the strength of yarn, which is the fibre's condensation distribution and straightness in cage is discovered in this paper.
为此，就不同倾角的输棉管道对纤维凝聚状态的影响进行了分析研究，从中确定了合理的纤维凝聚分布特征，为合理设计输棉管道倾角，提高纺纱强力提供依据。
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