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注塑机模板的实用计算模型 总被引:1,自引:0,他引:1
本文通过对注塑机合模机构实际工作情况的分析,提出了模板可简化为两端固定的普通梁的基本假设.并采用有限元方法和回归分析法,推出了注塑机前、后模板新的实用计算模型.经厂家实际使用证明,该计算模型简单、实用可靠,可以在注塑机模板设计中应用。 相似文献
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以实例进行注射成型机模板的强度和刚度可靠性设计,介绍了模板以P-S-N近似线图进行疲劳强度计算,按照应力-刚度模型进行刚度可靠性的设计方法,对注射成型机设计有一定的参考价值。 相似文献
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电子版原始记录具有快速数据计算处理、降低计算差错率、易存档和快速查询等特点,使得传统的手写纸质原始记录逐渐被电子版原始记录所取代,而“四舍六入,逢五取偶”的修约规则是化学、化工和计量等检验检测电子版原始记录数据处理的重要部分。本文通过EXCEL中简单函数的多重组合运用研究制定出五种组合函数公式,对零、正数和负数均能进行准确的四舍六入逢五取偶的数据修约,在满足化学、化工和计量科学中数据处理要求同时符合《数值修约规则与极限数值的表示和判定》(GB/T 8170-2008)中的进舍规则,适用于化学、化工、计量等检验检测行业基于EXCEL平台的电子原始记录模板和证书模板制作,能够为实现检验检测原始记录和证书电子化以及推广提供参考借鉴。 相似文献
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增加结构保温一体化墙体免拆模板的保温层厚度可实现更高的节能目标,然而增加保温层厚度后,现有连接件不能很好满足锚固要求。本文提出适用于较厚保温层免拆模板的连接件,对其连接性能进行分析,以实际工程为研究案例,通过ANSYS将增厚墙体中的连接件替换成改良连接件,对一体化墙体、加厚免拆模板的整体性和改良连接件自身受力及变形情况进行分析。经计算结果分析,一体化墙体整体锚固与改良前相比效果明显,免拆模板与现浇墙体协调变形,改良连接件改进部位符合受力规律,穿出免拆模板背面产生的应力集中不会对模板造成破坏,风压增高的情况下锚固效果优于普通连接件。结构保温一体化墙体加厚免拆模板连接性能较好。 相似文献
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根据轮胎外胎硫化传热属一维薄板传热而模板热源温度不同的情况,将傅立叶热传导方程中一维薄板稳态热传导微分方程和一维薄板非稳态热传导微分方程联立,建立了轮胎外硫化过程的传热计算数学模型,并得到实际硫化测温数据的初步验证,再结合阿累尼乌斯方程提出系列外胎硫化条件计算方法。 相似文献
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固定床催化反应器稳态模拟通用软件FBRS的开发 总被引:2,自引:1,他引:1
计算机模拟是研究列管式和多级绝热式固定床催化反应器的工程问题,例如工况模拟、设计计算、参数分析、操作或设计优化的强有力手段。本文简要地介绍了作者开发成功的、可以用于这两大类反应器各种典型模拟计算的通用软件 FBRS。它是一个通用、高效、结构开放和功能多样的软件系统。 相似文献
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A method based on the concept of solving inverse heat and mass transport problems was proposed to identify wood physical properties, with the use of empirical data, a mathematical model corresponding to the direct problem, and an optimization procedure. The computer software was developed to solve transient, three-dimensional, quasi-linear direct and inverse problems of heat and mass transport in wood as an anisotropic body together with initial and boundary conditions of any kind. The software was adapted to data parallel processing environment of high performance computers. Identification of thermal conductivity was performed for beech wood in three principal anatomic directions, and accuracy of temperature distribution predictions was significantly increased (the global relative error of prediction was reduced to 1.0 - 1.9%). 相似文献
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ABSTRACT A method based on the concept of solving inverse heat and mass transport problems was proposed to identify wood physical properties, with the use of empirical data, a mathematical model corresponding to the direct problem, and an optimization procedure. The computer software was developed to solve transient, three-dimensional, quasi-linear direct and inverse problems of heat and mass transport in wood as an anisotropic body together with initial and boundary conditions of any kind. The software was adapted to data parallel processing environment of high performance computers. Identification of thermal conductivity was performed for beech wood in three principal anatomic directions, and accuracy of temperature distribution predictions was significantly increased (the global relative error of prediction was reduced to 1.0 - 1.9%). 相似文献
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感光影像微结构分析仪的影像分析软件包研制 总被引:1,自引:0,他引:1
在感光影像微结构分析仪上研制出一套专用感光材料性能测试及影像质量评价专用分析测试软件包,使该分析仪具有一机多功能的特点,即能够同时对感光影像的多项性能指标进行分析测试。在测试过程中能自动进行数字采样,按编制好的程序计算,具有快速简便的优点。本文还对该软件包的设计思想、软件构成、测试方法、软件性能及测试结果作了详细介绍。 相似文献
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S. B. El-Magoli M. M. Morad M. Roushdi 《European Journal of Lipid Science and Technology》1979,81(6):244-245
Physical and chemical constants of some Egyptian animal fats, e. i. from camel hump and buffalo caul in comparison with imported beef tallow were investigated. Camel hump fat revealed different characteristics from buffalo caul and imported beef tallow in melting point, iodine value, saponification value and unsaponifiable matter. Fatty acid composition by GLC for the three extracted fats indicated the presence of large amounts of saturated fatty acids in comparison with unsaturated acids. Oleic acid was found to be the only unsaturated acid which has been in considerable amount especially in camel hump. Small amounts of palmitoleic and myristoleic acid were found in camel hump and buffalo caul while imported beef tallow contains more of myristopalmitic and palmitostearic acid. Sensory evaluations of shortenings prepared by incorporation of three different concentrations (5, 10, 15%) of the three extracted fats revealed that Egyptian animal fats can be used successfully as a substitute of imported fat. On the other hand 10% incorporation was found to be the most suitable concentration to obtain a good quality of the shortenings in colour, odor and consistency. Statistical analysis confirmed the above mentioned results. 相似文献
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在软件复用基本理论和技术的基础上,阐述了软件体系结构对软件复用的意义,提出了基于软件体系的软件复用开发方法以及在建筑陶瓷三维虚拟展示系统开发过程中的应用。 相似文献
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模糊最优化方法在陶瓷配方设计中的应用 总被引:3,自引:1,他引:3
本文首次将模糊最优化方法应用于陶瓷配方设计。讨论了多种因素影响的模糊条件下如何获得成本最低的陶瓷配方设计方案 ,并介绍了用Matlab数学软件求模糊最优化问题的最优解。通过举例从多角度阐述了陶瓷配方设计的模糊最优化问题的求解方法 相似文献