LQ—100^打印机手动送纸方式的改进

EpsonLQ-100+打印机（外形见照片）是一种高性能24针窄行点阵打印机。它的特点是高速打印、高精度图形打印、3种送纸方式、两种摆放位置、流行字体选择、良好的兼容性和简易面板控制设计等。其性能价格比高，非常适合家庭使用。1．3种送纸方式（1）用打印机自带的送纸盒呼装A4纸（50－60张）实现自动单页装纸；（2）用打印机后背送纸稽可实现单页手动送纸；（3）使用推动式拖纸器（可选件）可打印连续纸。2．手动送纸存在的问题家庭最常用的是打印16开纸张，送纸方式只能选用手动送纸方式。该打印机的检纸机构是一触点式微动开关。当手动…     

八节点四边形等参元非线性有限元分析

应用几何非线性有限元方法 ,研究了大变形问题中的纸张力学特性 ,采用修正的拉格朗日格式 ,推导了八节点四边形等参元用于非线性问题分析时的增量平衡方程 ,并编写了有关有限元计算程序 .应用该程序 ,对纸张在悬臂状态及自重作用下的静变形、无阻尼动态响应以及有阻尼动态响应分别进行计算 ,并与日本理光公司提供的试验数据以及MARC的计算结果进行比较 ,证实了该方法对于纸张的非线性力学特性的分析是有效的 ,可以为办公设备的合理设计提供科学依据     

大型通用有限元分析软件──ANSYS

CAE软件经过几十年的发展，已日渐成熟，其发展趋势也越来越明显。在功能方面趋向于多物理场耦合分析、非线性分析以及设计优化一体化；在软件使用方面则要求良好的数据库管理和强大的前后处理功能；CAE软件还要紧跟最先进的计算方法和计算机技术，以缩短分析时间、提高分析精度；开放性也是CAE软件发展的显著趋势，要求CAE有与CAD软件的接口甚至直接集成在CAD软件中，并提供良好CAE二次开发环境等。ANSYS是由美国ANSYS公司开发的大型通用有限元分析软件。自1970年成立以来．ANSYS公司在其创始人JohnSwanson教授的领导下，…     

基于CAE分析的网格模型的优化研究

注塑CAE常用的数值解法有边界单元法、有限单元法和有限差分法等,但这些解法都需要对所建立的模型进行单元网格划分,网格的好坏、疏密直接关系着CAE分析的效率.因此,网格模型的优化就成为CAE分析的一个关键环节. 一、几何模型的简化 由于软件功能的不同要求,注塑CAE模拟分析的网格模型往往与CAD设计的模型不完全一样,通常为了更为有效地进行模拟分析,在进行CAE的模型构建过程中,往往需要对模具的CAD模型中的一些细节进行简化运算.     

纸张定量的组合自校正控制

本文提出了一种新的纸张定量的组合自校正控制方案,给出了这种控制方案的设计原理,分析了这种方案的性能。本文所提出方案的鲁棒性和数值稳定性都优于现有的纸张定量的自校正控制方案,具有直接的工程实用价值。文中给出了本方案成功用于一台普通长网纸机的结果。     

ANSYS Maxwell R16助力高性能永磁电机仿真分析

本文基于CAE行业高速发展的电磁场数值计算工具--ANSYS Maxwel 有限元软件，运用最新仿真技术对永磁同步电动机磁钢涡流损耗计算、与控制电路场合协同等研究热点进行软件应用分析，帮助用户获得高效仿真分析方法和手段。     

链传动试管自动整理供送装置的设计

为了解决试管整理供送的问题，根据目前的一种试管特性，针对带凸台的试管包装容器的理料供送装置设计进行总体方案设计与机构三维建模分析，并对关键零部件进行了一定的优化设计。设计一种全自动整理供送装置，并对其各个机构进行设计和建模分析。根据试管的尺寸及结构特性，合理的设计料斗结构，采用链传动作为提升、整理装置，包括料斗、提升机构和导流槽。同时利用Solidworks软件对设计装置进行装配建模，为机构优化设计提供了依据并达到了设计要求；用离散元仿真软件EDEM对试管在导流槽的滑落情况进行仿真分析，得出结论导流槽倾斜角设计30°较为合适。     

光辉历程中国计算机发展50年专栏·制造业计算机应用之二 CAE助推工程和产品创新——中国工程院院士崔俊芝谈CAE技术的发展（一）

计算机辅助工程（CAE）是一种迅速发展的信息技术．是实现重大工程和工业产品的计算分析、模拟仿真与优化设计的工程软件．是支持工程科学家进行创新研究和工程师进行创新设计的最重要工具和手段。 CAE起源于20世纪50年代中期。实用的CAE软件诞生于20世纪70年代初期。 从20世纪的1970年到1985年，是CAE软件功能和算法的扩充和完善期。到了20世纪80年代中期．逐步形成了数十个商品化的通用和专用CAE软件。 近20年来，CAE软件发展得很快。目前，市场上的CAE软件．在功能、性能、可用性和可靠性方面，基本上满足了用户的当前需求，它们可以运行在超级并行机．大、中、小、微等各类计算机系统上。伴随着计算机技术的飞速发展，CAE技术还在迅速更新发展中。     

大型CAE软件ANSYS及强度试验对比研究

ANSYS软件是融结构、流体、电场、磁场、声场设计计算于一体的大型CAE软件,经过30多年的发展,取得了辉煌的成绩,并形成很多独有功能;ANSYS使用环境友好,功能强大,后处理技术完善;ANSYS在各类工程领域均有应用,可进行结构分析、非线性分析、热分析、电磁场分析、电场分析、流体流动分析、耦合场分析等;设计制造了一个组合梁,分别对其进行了ANSYS静力学强度数值模拟和电测法应力试验,对结果进行了对比分析,试验结果表明:ANSYS功能强大,分析数据安全可靠,可放心用于工程设计与计算.     

和纸禅意

作为日本最大的纸张制造商之一，Takeo公司每年都会举办一场纸张展览，意在展示这种纤薄的物质如何被创造性地使用。今年的展览围绕“微妙”这个主题，邀请了设计师、建筑师、艺术家以及制造师等不同身份的创作者从他们各自的视角来诠释他们对“微妙”的理解，颇可玩味。说到纸的设计，今天的艺术家和设计师们早已不再流于纸雕、纸塑、纸刻等这些只做表面文章的功夫，他们纷纷试图以更为动人的方式来表达纸张的内涵，冲破人们对纸张既有的功能定势，好以轻松有趣的方式诠释他们所理解的好艺术、好设计、好生活。在纸的淳朴本质式微的今天，往微处去，无疑是发现纸张美感的更好方式。     

A systems life cycle for office automation projects

As office automation activities become more complex and interrelated, the need for generalized, systematic planning and control procedures increases. For data processing projects, systems life cycles have proven to be a highly effective planning and control mechanisms. This paper presents an analogous life cycle for office automation projects. It incorporates those unique characteristics of the office environment that preclude use of existing data processing life cycles. The paper concludes with an illustrative application of the office automation life cycle.     

Elastic-plastic dynamic analysis of axisymmetric solids

This paper presents an application of isoparametric elements for the elastic-plastic dynamic analysis of shells of revolution. General isoparametric elements with curved sides are used in the finiic element discretization. These are capable of representing solids of revolution in the form of a layered system. Structures with complex geometries and sharp discontinuities may be studied. Solutions can be obtained for both thin and thick shells because the customary Kirchhoff-Love hypothesis is not invoked.

Dynamic analysis is carried out by means of step-by-step integration, the program allowing for the use of any of the schemes belonging to the Newmark family of methods (with free parameters γ and β) and the Wilson and Farhoomand θ-method. Flow theory of plasticity is used in the inelastic range and either isotropic hardening or kinematic linear hardening may be adopted. The program can analyze axisymmetric structures subjected To axially symmetric loading as well as plane stress problems. Numerical examples presented include the dynamic analyses of a simply supported beam and two spherical caps.     

面向服务架构的企业综合办公信息系统研究与设计

目前许多企业都已实施办公自动化系统,大多依照传统的办公自动化理论,采用非结构化的传统文档处理系统,很难与现有业务系统整合,失败率较高。针对这种情况,通过对企业办公需求的深入分析,提出了适合企业的面向服务架构的综合办公信息系统理念,并对其特点、架构、功能及其关键技术进行阐述,并给出黑龙江省电力公司的成功案例。     

PSP在办公自动化信息平台开发中的研究

PSP是为帮助软件工程师完成出色的工作而设计的,它通过循序渐进的方法帮助软件工作人员度量、分析和改进自身的工作过程,从而提高工作效率,减少工作失误,并最终达到在预定的时间内生产出高质量软件产品的目的。本文描述了PSP的持续改进过程及在软件开发中的作用,给出了PSP的进化框架,分析了PSP与TSP、CMM之间的关系,并针对办公自动化信息平台的开发,说明了其具体实施过程。     

Some integration formulas for a four-node isoparametric element

In this paper we present analytical integration formulas for a four-node isoparametric element. All the formulas are constructed with three simple functions of element nodal values, and therefore they can be easily coded and have high cost-effectiveness. Some of the formulas are exact and some are approximate. However, even the approximate formulas have enough accuracy and do not suffer from the so-called “hourglass” instability, which is a major drawback of one-point quadrature.     

Basis for isoparametric stress elements

The family of the so-called ‘isoparametric strain (displacement) elements’ is restricted to membranes and solids. The reason for this restriction has led to the development of a new family based on stress assumptions; these elements will be referred to as ‘isoparametric stress elements’. This family contains plates and solids but no membranes. The omission of a particular element in each family is consistent with the plate-membrane analogies. The basic flexibility matrix of an isoparametric stress element is singular since the zero stress state is directly included. The rank technique is adopted to automatically extract the zero stress modes such that the element can be completely interchangeable between any finite element system. The theory for stress assumed isoparametric “quadrilateral” plate bending elements with curved boundaries is given. A brief presentation of the theory for isoparametric stress solid elements is also included.     

On elastic-plastic analysis of I-beams in bending and torsion

The use of various models is studied to represent an I-beam for its elastic-plastic bending and torsional response including warping. The rectangular cross-section 2-node Hermitian beam element, the 4-node isoparametric beam element, and the 9-node isoparametric shell element of ADINA with constraint equations are used to establish the models. The linear elastic and elastic-plastic solutions of a cantilevered I-beam are given, and it is concluded that the I-beam model constructed with the isoparametric beam element can be used for general analysis.     

基于Jaumin的等参单元算法框架设计

针对等参有限元的计算特点和有限元软件多种单元的开发需求,基于高性能计算程序开发框架Jaumin,使用面向对象语言,采用抽象和多态技术以及工厂模式,为有限元软件PANDA设计等参单元算法框架.该框架具有良好的可复用性及可扩展性,开发过程清晰,有利于提高开发效率.给出等参单元算法框架中各个模块所对应的类以及类的接口.实例表明用PANDA中已实现的等参单元计算结果与ANSYS的计算结果一致.     

Exploring ‘Generation Y’ interaction qualities at home and at work

Information technology support of office work has increased rapidly in functionality, but new ways of interacting have evolved more slowly. This paper adds to the design research community’s notion of interaction quality by exploring these new ways of interacting and comparing them in the home and work contexts. We describe and analyze two interview studies conducted with office workers to consider how they perceive, experience and compare interaction qualities. Six interaction qualities (instant, expressive, playful, collaborative, responsive and flexible) were identified that together embody an interaction style that we have labeled ‘Generation Y.’ From learning and comparing these qualities, we found that personal and natural type of interactions were mostly experienced in the more private home context. Formal and subtle type of interactions were mostly experienced in the more public work context. We also found that the office workers scored the interaction qualities in their home context as richer than in their work context. This study resulted in a set of design guidelines, aiming to be used to implement the Generation Y interaction style in future office tools and applications. Designers and researchers will benefit from the result of this study from understanding rich interaction design in the work context.     

Cubic isoparametric rolling/traveling finite elements

In this paper, the development and formulation of a new cubic isoparametric rolling/travelling finite element is described. The element can be used to simulate the dyanamic response of steadily rolling/traveling viscoelastic structures without the necessity of numerical time integration of the governing equations. Due to its higher order shape function, the element can more accurately simulate both the inertia and viscoelastic effects associated with rolling/traveling structures than currently available lower order moving elements. To illustrate the capabilities of the new cubic element, comparisons with exact and lower order generated results are presented.