Results 81 to 90 of about 11,925 (169)
Bearing performance of wallboards in an electrostatic precipitator casing in consideration of stressed skin effect [PDF]
, 2016 For a wallboard in an electrostatic precipitator casing playing stressed skin effect under vertical uniform pressure on the top, the failure mode and bearing capacity were investigated by nonlinear finite element method.
PAN Li-cheng +5 more
core +1 more source
Gaoya dianqi, 2019 利用Ansys软件建立了高压开关设备用矩形槽O形密封圈模型,对该O形密封圈的变形和应力分布状况进行了数值模拟分析,研究了其工作时的受力、变形及密封效果。对该O形密封圈在不同压缩率、不同充气压力下的内应力及密封面接触应力分布进行了探讨,确定了仅考虑应力作用下O形密封圈材料容易失效的位置,并得出充气压力在1.6 MPa以下时O形密封圈没有被挤入上、下法兰间隙。
涂德华, 魏雅君, 张鑫
doaj
Evaluation of residual stress and its influence on fracture performance of Q690 thick plate butt welded joint [PDF]
ObjectiveThis study aims to investigate the complex welding residual stress of high-strength steel thick plate with multi-pass welding, and examines the influence of such stress on the fracture behavior of welded joints.
Hongquan ZHAO +6 more
core +1 more source
Digital twin based stress field prediction method for offshore floating power generation platform connectors [PDF]
ObjectivesWhen assessing the safety of the connectors of a multi-module offshore floating power generation platform, in order to compensate for the inability to carry out the real-time monitoring of the structural stress field across the whole domain due
Lin GAN, Tao ZHANG, Yu CAO
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Gaoya dianqi, 2010 运用有限元法,研究了电缆终端应力锥安装错位时的高压静电场的分布和数值大小,计算了加载110 kV恒定电压于电力电缆上时,其终端的静电场分布与数值。应力锥正确安装时,覆盖电缆半导电层为60 mm,分析了应力锥覆盖电缆半导电层50、46、73 mm的电场分布和半导电层末端周围的电场畸变。最后对不同模型的仿真结果进行了比较,得出,应力锥安装过盈时,即覆盖半导电层超过60 mm,电场畸变严重,在工频下存在剧烈的局部放电现象。通过现场试验,验证了有限元分析结果的正确性。
陈成伟, 刘刚, 陆国俊, 王劲
doaj
Gaoya dianqi, 2015 对绝缘隔板的主应力大小、方向和分布情况进行准确的计算和确定是改进设计的前提。笔者采用有限元软件对252 k V GIS用绝缘隔板在不同压力下的主应力分布进行了仿真计算,在对其进行的水压试验验证中,采用高速摄像机获取了水压破坏发展过程的影像和破坏时间,采用应变片与动态信号采集分析系统监测了水压试验中绝缘隔板重点部位的主应力变化。分析表明,仿真计算的最大主应力分布和方向与试验结果具有很好的一致性,应力大小存在一定差异,需进一步研究和完善;通过各监测点在破坏前后的应力突变可较为准确判断破坏的位置和发展方向 ...
马占峰 +6 more
doaj
Analysis of spatiotemporal evolution characteristics of floor rock mass and roadway failure under mining influence [PDF]
Clarifying the distribution law of mining induced stress in the working face floor, achieving precise grasp of the degree of damage to the floor rock mass and roadway under the influence of mining, can effectively prevent deformation and instability of ...
Baojie FU +4 more
core +1 more source
Shiyou jixie, 2012 针对应力集中导致石油钻杆螺纹产生疲劳裂纹，进而发生断裂失效的事故，在API接头的基础上，研究开发了一种新型钻杆螺纹接头，该新型螺纹结构主要改进之处是内螺纹锥度保持1:6不变，外螺纹锥度变为1:6.23。有限元分析结果表明，这种螺纹形式显著改善了接头上的受力分布情况，使得螺纹上应力分布更加均匀，并降低了主台肩过渡圆角处的应力集中。对样品的上扣试验结果表明，采用新型螺纹后，外螺纹接头主台肩底部的过渡圆角处应力集中情况也得到明显改善，接头整体受力分布和不同区域应力差更趋平缓 ...
焦文鸿, 高连新, 鲁喜宁
doaj
Exploration of the impacts of cement sheath on casing stress based on the arching effects of formations [PDF]
ObjectiveWith the growth in the demand for natural oil and gas and the technological progress of their production, the oil and gas well depths have been constantly setting new records.
Fengchen AN +6 more
core +1 more source
Jixie chuandong, 2009 描述了ANSYS分析中心孔带有键槽的直齿圆柱齿轮的应力分布与结构尺寸,给出了有限元分析的应力和位移,同时分析了键槽根部半径对应力的影响,分析了键槽与齿槽的相对位置影响,最后给出了最优相对位置。
于军, 王伟
doaj