共查询到20条相似文献,搜索用时 78 毫秒
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根据轴类零件上常见结构的特征并借助AutoCAD的二次开发工具ObjectARX,这里讨论了从基于AutoCAD的二维图形中识别出轴上常见结构并提取结构参数的方法,为计算机对AutoCAD图形的理解提供了参考。 相似文献
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提出了背叶片-副叶轮流体动力密封设计中在保证无泄漏的密封性能前提下,以功耗为目标函数的各结构参数的优化设计数学模型。 相似文献
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对塑料成型机合模机构分析,建立目标函数、约束条件,得出符合其运动要求的数学模型,然后运用LINGO作为优化工具,编程求解得出符合要求的最优值,LINGO的应用使设计过程更加简单,从而提高了工作效率,给设计人员带来很大方便。 相似文献
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全面分析铲运机工作装置特点,将其分解为转斗机构和举升机构两大功能相对独立子机构,通过选取对工作装置性能影响最大的传动比为目标函数,以边界约束、性能约束、运动协调性约束、油缸稳定性约束、总体布置约束、干涉性约束等为条件,建立优化设计数学模型. 相似文献
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针对受力情况相似的一轴类零件,采用优化设计的方法,利用VB编程语言,设计了一个该类轴的通用优化设计软件。设计过程中,通过数学建模,优化程序编写,软件设计,不仅可以由用户输入设计参数来实现设计轴的结构尺寸的优化计算,还实现了对优化计算过程中点的跟踪和动画仿真功能,使优化结果更加具有可靠性。 相似文献
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H. A. ElMaraghy R. Majety 《The International Journal of Advanced Manufacturing Technology》2008,37(3-4):371-399
Supply chain management (SCM) presents significant opportunities for improving profit margins and reducing cost. It encompasses
functional and geographical integration as well as integration of tactical and operational decisions. The functional integration
aspects involve purchasing, manufacturing, and logistics within the company and across the supply chain. A supply chain design
framework has been developed including linear/mixed integer multi-criteria optimization models for determining the identified
supply chain design parameters. The selection of suppliers, determination of production quantities, inventory locations and
sizes, selection of transportation method and transported quantities in a multi-stage, multi-level supply chain are investigated.
Additional criteria including first-time quality (FTQ) and suppliers on-time delivery risk with and without allowing splitting
of customer demand between suppliers are considered. An example of typical automotive power train supply chain design and
decision issues is used to illustrate the effect of various factors. 相似文献
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The current research of configurable product design mainly focuses on how to convert a predefined set of components into a valid set of product structures. With the scale and complexity of configurable products increasing, the interdependencies between customer demands and product structures grow up as well. The result is that existing product structures fails to satisfy the individual customer requirements and hence product variants are needed. This paper is aimed to build a bridge between customer demands and product structures in order to make demand-driven fast response design feasible. First of all, multi-hierarchical models of configurable product design are established with customer demand model, technical requirement model and product structure model. Then, the transition of multi-hierarchical models among customer demand model, technical requirement model and product structure model is solved with fuzzy analytic hierarchy process (FAHP) and the algorithm of multi-level matching. Finally, optimal structure according to the customer demands is obtained with the calculation of Euclidean distance and similarity of some cases. In practice, the configuration design of a clamping unit of injection molding machine successfully performs an optimal search strategy for the product variants with reasonable satisfaction to individual customer demands. The proposed method can automatically generate a configuration design with better alternatives for each product structures, and shorten the time of finding the configuration of a product. 相似文献
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机械优化设计中BP神经网络的应用研究 总被引:4,自引:0,他引:4
从BP网络的工作原理出发,利用多水平正交表选取BP神经网络训练样本,通过正向传播和误差反向传播建立BP网络的拓扑结构。对二级减速器BP网络模型进行了结构修正与优化计算。实验表明在机械优化设计领域针对实体结构的动态分析计算,采用BP神经网络可以提高了优化收敛速度和精度,这表明神经网络理论与传统的数值方法相结合的方法具有重要的现实意义。 相似文献