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缩径比
相关语句
  diameter reduction ratio
     By dynamical method and computer,molten zone’s shapes,diameter reduction ratio and diameter variation of single crystal fiber in the growth were analysed.
     本文运用动力学方法和借助于计算机,对LHPG法中熔区的形状、缩径比,以及生长时单晶光纤的直径变化作了分析。
短句来源
     Shape of The molten zone,proper diameter reduction ratio and variant condition of diameter variation have been found in steady growing of single crystal fiber.
     得到稳定生长时熔区的形状、合适的缩径比,以及单晶光纤直径变化的各种情况。
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  “缩径比”译为未确定词的双语例句
     When the total ratio of sinking deformation n_t is larger than that of the critical deformation n_l, multi-sinking is demanded and every sinking ratio n should be less than n_l.
     当总的缩径变形比n总大于其极限变形比n极时,需多次缩径,且每次缩径比n应小于n极。
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Based on the recurrence formula from statical equilibium,we havecalculated the molten zone′s shape at the state of growing with equiradialand ungrowing,and other concerned data in LHPG method by computer.Afteranalyzing the data,we can lead to the relation between the pressure in themolten zone and the shape of it,and the range of the pressure.We also makesome discussion about the limit condition when diameter ratio r_t/R tend tozero.

本文由静力学平衡导出的递推公式,用微机计算出激光加热基座生长(LHPG)法中等径生长状态和无生长状态的熔区形状及一些有关的数据。通过数据分析,得到熔区压强和熔区形状之间的关系及其取值范围,并对缩径比趋于零的情况进行了讨论。

By dynamical method and computer,molten zone’s shapes,diameter reduction ratio and diameter variation of single crystal fiber in the growth were analysed.Shape of The molten zone,proper diameter reduction ratio and variant condition of diameter variation have been found in steady growing of single crystal fiber.

本文运用动力学方法和借助于计算机,对LHPG法中熔区的形状、缩径比,以及生长时单晶光纤的直径变化作了分析。得到稳定生长时熔区的形状、合适的缩径比,以及单晶光纤直径变化的各种情况。

The process of extrusion-sinking for thin-walled tubes can be divided into four stages: rigid sliding, sinking, backbending and extrusion. The critical angle α of the rigid sliding is tg(90° -α )≤tg. When the total ratio of sinking deformation n_t is larger than that of the critical deformation n_l, multi-sinking is demanded and every sinking ratio n should be less than n_l. By using tLhe rigid-plastic finite element method, the sinking process is simulated by computer, thereby the mesh deformation and stress-strain...

The process of extrusion-sinking for thin-walled tubes can be divided into four stages: rigid sliding, sinking, backbending and extrusion. The critical angle α of the rigid sliding is tg(90° -α )≤tg. When the total ratio of sinking deformation n_t is larger than that of the critical deformation n_l, multi-sinking is demanded and every sinking ratio n should be less than n_l. By using tLhe rigid-plastic finite element method, the sinking process is simulated by computer, thereby the mesh deformation and stress-strain distribution along the axial section of the tube wall and the load-displaecement curve are obtained, and the calculated results show little difference from the test results. In addition, the equations for calculating the sinking force and wall change are derived by using the slab method and the modified Tresca yield criterion. By using tLhe above-mentioned technology, both the quality and Properties of the compoent parts can be improved.

薄壁管缩径挤压成形过程可分为刚性滑入、缩径变形、反弯曲和挤压四个阶段。满足刚性滑入的动力学条件为tg(90°-α)≤tg。当总的缩径变形比n总大于其极限变形比n极时,需多次缩径,且每次缩径比n应小于n极。采用刚塑性有限元法对缩径变形过程进行计算机模拟,可得到管壁轴向剖面上网格变形和应变分布以及载荷位移曲线,与实验结果吻合程度高;采用主应力法和修正的Tresca屈服准则,可分别导出缩径成形力和壁厚变化规律的计算公式。采用这种工艺可节省材料,提高生产效率和零件的质量及性能。

 
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