摘要：对于厚度6mm的人工髋臼，改变配合间隙，经有限元分析后得到最大接触应力及接触区域与间隙之间的关系（表1），其中Фt为交际接触边缘点所对应的Ф角。

摘要：目的 研究与直径28 mm人工股骨头配合的厚度为4～10mm超高分子量聚乙烯人工髋臼的耐磨性能.方法 对比弹性变形理论和有限元分析方法获得接触应力分布规律,通过计算在正常步态过程中应力对于滑动摩擦位移的积分,结合Archard磨损计算公式,比较不同厚度人工髋臼蘑损量的计算结果.结果 弹性变形理论和有限元分析方法获得接触应力分布规律相近.结论 对于体重65kg左右的患者,与直径28 mm人工股骨头配合时,内球面半径稍大于人工股骨头,厚度为6 mm左右的人工髋臼具有耐磨性好、材料利用率高、并能够保证使用灵活的最佳综合性能,为人工髋臼的个性化及优化设计提供理论依据.

摘要：Considering the essential and influential role of centrifugal compressors in a wide range of industries makes most of engineers research and study on design and optimization of centrifugal compressors. Centrifugal compressors are the key to part of oil, gas and petrochemical industries as well as gas pipeline transports. Since complete 3D design of the compressor consumes a considerable amount of time, most of active companies in the field, are profoundly interested in obtaining a design outline before taking any further steps in designing the entire machine. In this paper, a numerical algorithm, named ACDA (adapted compressor design algorithm) for fast and accurate preliminary design of centrifugal compressor is presented. The design procedure is obtained under real gas behavior, using an appropriate equation of state. Starting from impeller inlet, the procedure is continued on by resulting in numerical calculation for other sections including impeller exit, volute and exit diffuser. Clearly, in any step suitable correction factors are employed in order to conclude in precise numerical results. Finally, the achieved design result is compared with available reference data.

摘要：Within today"s product development process, various FE-simulations (finite element) for the functional validation of the desired characteristics are made to avoid expensive testing with real components. Those simulations are performed with great effort for discretization, use of simulations conditions, like taking different non-linearities (i. e., material behavior, etc.) into account, to create meaningful results. Despite knowing the effects of deformations occurring during the production processes, always the non-deformed design model of a CAD-system (computer aided design) is used for the FE-simulations. It seems rather doubtful that further refinement of simulation methods makes sense, if the real manufactured geometry of the component is not considered for in the simulation. For an efficient exploit of the potential of simulation methods, an approach has been developed which offers a geometry model for simulation based on the existing CAD-model but with integrated production deviations as soon as a first prototype is at hand by adapting the FE-mesh to the real, 3D surface detected geometry.