软土地基上筒状基础的抗弯承载力分析

在软土地基上建造风力发电机,首先要解决的问题就是降低基础造价。筒状基础具有结构简单、施工方便、造价低等特点,可代替传统的桩基,降低造价。本文利用MSC．Marc有限元软件对不同埋深条件下软土地基上的筒状基础进行三维有限元分析,并将有限元分析得到的抗弯承载力与通过单管塔规范计算公式得到的结果进行了比较,得出单管塔规范所采用的简化计算方法是可行的。通过对16m埋深条件下的桩的侧向土压力和侧摩阻力的有限元分析,表明简化方法采用的基本假定和受力机制是合理的。     

基于Marc的圆柱斜齿轮啮合过程动态强度仿真与分析

齿轮是机械传动系统中最主要的零件,其安全可靠性是机械设计中非常重要的指标。为了更好满足使用要求,对圆柱斜齿轮进行精确设计与加工,利用非线性有限元仿真软件——Marc对圆柱斜齿轮动态啮合过程齿面接触应力和齿根弯曲应力变化规律进行研究,从而为齿轮设计提供理论依据。     

基于MSC.Marc的多道焊数值模拟

桥梁和船舶制造业一直受到焊接残余应力和变形所导致的生产费用提高、延误工期问题的困扰，研究焊接残余应力和变形具有重要的工程实际意义。本文利用有限元分析软件MSC．Marc对平板对接多道焊进行了实时三维数值模拟，得到了焊接温度场、焊后残余应力分布以及变形，并对模拟计算结果进行了定性分析。     

轿车等速万向节星形套冷挤压成型过程有限元模拟

采用大型有限元软件MSC.Marc对轿车等速万向节星形套冷挤压成型过程进行了有限元数值模拟,详细讨论了有关数值模拟技术问题,得出了挤压力在加载过程中的变化曲线、工件随时间变化的温度场分布云图、工件等效塑性应变云图及模具内圈的应力分布云图,较好地解释了模具疲劳破坏的原因.研究结果有助于对轿车等速万向节星形套成型工艺及模具结构进行优化设计.     

That Old Thing Called Flexibility: An Interview with Robert Venturi and Denise Scott Brown

Robert Venturi and Denise Scott Brown hold an unrivalled position within architecture. Now written several decades ago, their classic books Learning from Las Vegas and Complexity and Contradiction remain unsurpassed for their ability to shock and overturn current architectural thought. Francesco Proto talks to Venturi and Scott Brown on their present thinking about iconography, transparency, spectacularisation, architectural pornography and the contemporary architectural avant-garde. Copyright © 2009 John Wiley & Sons, Ltd.     

热循环作用下太阳电池板单元结构寿命预测

试验测试了热循环过程中太阳电池板单元结构各被粘接层的热应变值,结合有限元MSC.Marc模拟的结果提出了以热应变极大值或残余热应变作为热循环条件下胶接结构的损伤参量,建立了预测太阳电池板寿命的数学模型。     

用Marc软件提供的接触分析功能简化网格划分

利用大型结构分析程序MSC．Marc提供的接触分析的功能,以保证有限元网格不发生穿透,使有限元疏密网格界面两侧各相应点的位移和应变在界面上协调,而不必过多考虑节点的协调关系。这样三维有限元网格的过渡易于实现,使有限元网格划分可以以积木式进行,简化了前处理工作,大大缩短对复杂结构的网格剖分的时间。而且．由于有限元网格剖分以积木式进行．使有限元网格的自动割分也简化了不少。     

Tectonism in Architecture,Design and Fashion: Innovations in Digital Fabrication as Stylistic Drivers

After ‘foldism’ and ‘blobism’ comes ‘tectonism’ – a new branch of the epochal style of parametricism that allows greater expressive and formal variety. It is made possible by an evolving range of digital tools for structural form-finding and physics analysis, linked directly to fabrication. As Patrik Schumacher , principal of Zaha Hadid Architects, underlines, these do not remove the need for architects to collaborate with engineers and fabricators, but they do enable them to acquire more reliable intuitions about the logics of these other disciplines. This can only enhance their capacity to produce works that successfully combine communication and social functionality with technical integrity.