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讨论了ANSYS有限元软件在处理金属轧制变形中遇到的建模、材质、有限单元剖分、加载和结果数据处理等方面的问题,通过运用前处理、求解、后处理中的多种方法,解决了出现的特殊情况,并针对各方面问题提出了一些建议。 相似文献
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中厚板轧制过程的有限元仿真研究 总被引:1,自引:0,他引:1
本文采用了MSC MARC2005有限元分析软件包建立了中厚板轧制的有限元仿真模型,通过接触分析的方法对中厚板的轧制过程进行了三维模拟仿真,并对不同压下量轧件轧后变形及应力分布做了分析,结果表明与实际轧制参数基本一致。 相似文献
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膨胀土的室内试验分析与研究 总被引:1,自引:0,他引:1
膨胀土是一种含有大量的亲水性粘土矿物成分,在环境湿度变化影响下;产生强烈胀缩变形的特殊性粘土,其吸水膨胀、失水收缩而变形时产生较大内应力的特性,对工程建设及建筑物的安全与稳定带来极大的危害。准确把握膨胀土的变形机理,测得可靠的室内试验数据,是合理提出膨胀土场地地基处理方案和预防措施的基本依据。 相似文献
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立柱结构是重要的承载部件,文章运用ANSYS有限元分析软件对大型游乐设施“双摆臂秋千”立柱结构进行优化设计。为避免在工作中因强度不足而造成立柱结构损坏,运用有限元分析软件对立柱结构进行静力学分析。本文首先确定了工作状态下立柱结构受到的各种载荷,然后利用SolidWorks软件建立了立柱结构的三维模型,导入ANSYS软件中完成有限元模型的创建,加载求解后读取应力数据。最后对立柱结构的两种方案进行了强度校核,经过多方面对比,结果表明,型钢焊接而成的立柱结构优于钢板焊接而成的立柱结构。为设计人员提出合理的建议和可靠的依据,使立柱结构达到性能满足使用要求、原材料消耗最低的优化设计。 相似文献
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采用低碳低合金的成分设计开发了一种新型的膨胀管用钢。经优化的(α+γ)两相区退火工艺处理后,钢材呈现出强度高、延伸性能好、加工硬化能力强、冲击韧性以及高温力学性能优良等特点。常温条件下,该膨胀管材料的抗拉强度超过了700MPa,伸长率超过了40%,强塑积达到了30GPa·%,半厚冲击韧性超过了50J;300℃高温条件下,该类钢仍具有620MPa以上的抗拉强度,40%以上的伸长率以及25GPa·%以上的强塑积。采用SEM和XRD对材料的微观组织进行了表征,该类钢具有马氏体+残余奥氏体+铁素体的多相组织结构形貌。由于弥散分布的小尺寸残余奥氏体在形变过程中的TRIP效应,使得该类钢种在拉伸过程中获得了持续加工硬化的能力,从而获得了强度与塑性的优良结合。 相似文献
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介绍了炼化企业管式加热炉余热回收系统中的鼓、引风机的三种节能技术,对近年来国际上专门针对风机、泵类离心负载调速节能开发的一项突破性新技术——永磁驱动技术进行了深入研究,并对三种风机节能技术进行了详细对比,列出了技术优、缺点及适用范围的对比表,用来指导风机节能技术的合理选择和应用。 相似文献
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Eighteen expandable metallic biliary stents were inserted in patients with malignant (16 patients) or benign (two patients) biliary strictures. Four were the Gianturco-Rosch biliary Z-stents and the remaining 14 were the Wallstent. The stents were delivered through either the endoscopic transpapillary (10 patients), percutaneous transhepatic (five patients) or combined percutaneous-endoscopic (three patients) route. No failure in implantation was encountered. Bile drainage was successful in all patients. Stent occlusions were observed in four patients with hilar obstruction due to tumour overgrowth above the stents at 30-67 days (mean 47.75 days) after insertion. The occlusions were drained percutaneously (two patients) or endoscopically (two patients). Migration of stent did not occur. After a median follow-up period of 170.5 days (range 57-731 days), 11 patients were still alive and free of jaundice. The median patency period of the stents for common bile duct and hilar obstruction was 288.5 days (range 117-731 days) and 61.5 days (range 30-188 days), respectively. The overall median patency period was 165 days. It is concluded that expandable metallic biliary stent is a useful adjunct to the treatment of malignant biliary obstructions with a better result in distal obstruction. 相似文献
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Joseph J. Mangan 《Canadian Metallurgical Quarterly》1990,3(3):155-172
This paper is directed only to the basic aspects of hedratecture. The word hedratecture is derived from the Greek “to build with hedrons.” It is used to describe the art and science of constructing with framed elements that are hedron‐shaped, usually in the form of the five convex polyhedrons. Hedratecture encompasses two major elements: the expandable platform and structures thereon. The platform when set on a surface by computer has the capability to incorporate within itself a whole variety of integrated lesser structures that provide dwelling units and a modular internal transportation system. The platform can be placed in a designated area as a hedron city or expanded in a linear dimension and in that mode it becomes a trestle or a bridge. The basic elements provide an endless variety of shapes with uses that vary from a small helicopter pad to a small city on earth. When placed on the Moon or Mars it can provide a telerobotically placed base. 相似文献
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Three passes of plate rolling during vertical-horizontal rolling process are simulated with explicit dynamic finite element method and updating geometric method. The equivalent strain and stress fields, and shape change at the head and tail of slab during rolling are obtained. The calculated result of the shape at the head and tail of slab is in good agreement with the measured one. The explicit dynamic finite element method and updating geometric method can be used effectively to analyze the multipass vertical-horizontal (V-H) rolling process. 相似文献
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运用有限单元分析方法详细考察了承受均匀外压力的样本油套管在不同椭圆度、不同壁厚不均(或称偏心度)、以及不同椭圆度和壁厚不均组合等初始几何缺陷的情况下的应力变化及其分布,并作出相应的初始几何缺陷与应力变化的曲线. 相似文献