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Containment ability and groove depth design of U type protection ring 被引量:6
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作者 Bai Conger Xuan Haijun +2 位作者 Huang Xiannian He Zekan Hong weirong 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2016年第2期395-402,共8页
High-energy rotor uncontained failure can cause catastrophic damage effects to aircraft systems if not addressed in design. In this paper, numerical simulations of three high-energy rotor disk fragments impacting on U... High-energy rotor uncontained failure can cause catastrophic damage effects to aircraft systems if not addressed in design. In this paper, numerical simulations of three high-energy rotor disk fragments impacting on U type protection rings are carried out using LS-DYNA. Protection rings with the same mass and different groove depths are designed to study the influence of the groove depth. Simulation results including kinetic energy and impact force variation of single frag- ment are presented. It shows that the groove depth infects both the axial containment ability of the protection ring and the transfer process of energy. The depth of groove ought to be controlled to an appropriate value to meet both the requirement of axial containment and higher safety factor. Ver- ification test on high-speed spin tester has been conducted and shows that protection ring with appropriate U structure can resist the impact of the disk burst fragments. The ring is inflated from a circular to an oval-triangle shape. The corresponding simulation shows good agreement with the test. 展开更多
关键词 Disk fragments containment High energy rotor Numerical analysis protection ring Verification test
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环渤海经济圈地方保护与产业同构的理论与实证研究 被引量:2
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作者 邓路 《大连理工大学学报(社会科学版)》 CSSCI 2010年第1期51-54,共4页
进一步调整和优化国家及区域产业结构是当前我国宏观经济运行的显著特征和预期目标。文章首先对环渤海经济圈内总体的制造业结构相似系数以及产业层面的结构相似系数进行实证测度,证实了该区域内产业同构的存在,环渤海经济圈由于行政分... 进一步调整和优化国家及区域产业结构是当前我国宏观经济运行的显著特征和预期目标。文章首先对环渤海经济圈内总体的制造业结构相似系数以及产业层面的结构相似系数进行实证测度,证实了该区域内产业同构的存在,环渤海经济圈由于行政分割产生的地方保护是导致区域内产业同构的主要内在动因,通过构建一个区域行政分割下的地方保护与区域内产业动态选择模型进一步证实了该结论。 展开更多
关键词 环渤海经济圈 地方保护 产业同构
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