共查询到13条相似文献,搜索用时 62 毫秒
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针对塔里木东河油田某井套管补贴案例,利用Abaqus建立膨胀管机械式膨胀模型和液压式膨胀模型,对膨胀管的膨胀压力、缩短率、壁厚和通径等进行仿真,分析对比2种膨胀方式的各种参数.仿真结果与现场施工数据吻合较好. 相似文献
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针对在GE17自润滑关节轴承轴向静载试验中,轴承内圈轴向位移大于许用值的问题,应用Abaqus建立GE17轴向静力加载模型进行分析,结果表明轴承外圈端面的安装沟槽削弱轴承的轴向刚度。改进GE17轴承结构,减小轴承球径尺寸,增加沟槽内挡边厚度,提高其抗挤压变形能力。试验结果表明,改进后结构在额定载荷下的轴向位移减小10.7%,从而验证仿真结果的准确性和结构改进的有效性,为同类型轴承设计提供参考。 相似文献
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Stiffener layout design for plate structures by growing and branching tree model (application to vibration-proof design) 总被引:3,自引:0,他引:3
From the inspiration of branching systems in nature, this paper suggests a new and direct topology optimization method for the generation of stiffener layout patterns for plate structures by introducing the growing and branching tree model. The growth technique begins with the growing of ground baby stiffeners around a given set of seeds. Each stiffener extends by obeying growing and branching rules like those for trees. A potential for branching is assigned to stiffeners whose cross-sectional areas are greater than a specified threshold dimension, and the best growing direction of a branch is selected depending on the effect of the extension of a new branch. During the growing of a stiffener, the volume growth rate is controlled so as to make it possible to create new branches and to eliminate degenerated stiffeners. The growing process stops when the stiffener volume reaches a given upper limit. Some numerical examples are used to illustrate the effectiveness of the proposed method, and the influence of various factors on the method is discussed. 相似文献