Results 81 to 90 of about 2,496 (200)

[Finite element analysis of determining corneal biomechanical properties in vivo based on Corvis ST]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2020
Meng Q, Wang X, Chen W, Li X, He R.
europepmc   +1 more source

Vibration testing and safety assessment of compressor outlet piping for compressor station [PDF]

open access: yes
Objective The oil and gas industry has gradually integrated the safety monitoring of piping vibration under service conditions into the standard management system.
Chen SHANG   +4 more
core   +1 more source

Design and thermal analysis of high performance MEMS capacitive pressure sensor [PDF]

open access: yes, 2010
为了进一步提高接触式电容压力传感器的性能,设计了一种高性能双凹槽结构的接触式电容压力传感器,并对该传感器在高温环境中的总体性能进行了分析。推导了热传导和热弹性理论,并对影响传感器热分析的各个因素与温度的依赖关系进行了描述;在整个分析过程中,使用AnSyS软件并结合有限元方法对全尺寸传感器的热效应进行模拟。结果表明,在接触工作状态双凹槽接触式电容压力传感器的温度对输入(压力)-输出(电容)特性的影响是线性的,且线性范围内初始压力随温度的升高而降低;当温度载荷为550 k时,双凹槽结构的灵敏度为1 ...
吕浩杰   +4 more
core  

翼缘双摩擦面Z形悬臂梁式全螺栓连接梁柱节点抗震性能研究

open access: yesJianzhu Gangjiegou Jinzhan
为研究提出的新型翼缘双摩擦面Z形悬臂梁式全螺栓连接梁柱节点的抗震性能,设计相关试件进行拟静力试验和有限元分析。同时利用有限元模拟对新型梁柱节点进行参数化分析,以验证提出的节点适用性及设计方法的合理性。研究结果表明:新型节点发生梁端受弯破坏,最终在悬臂梁翼缘与钢柱焊接处开裂;翼缘螺栓连接段内无滑动现象,滞回曲线饱满无捏缩;连接节点的承载能力强,变形能力良好;有限元分析结果与试验结果吻合良好;当按等强连接配置螺栓时,不同截面尺寸的节点模型滞回性能相近,破坏模式相同,可按规范规定的刚接节点设计方法进行设计。
沙磊, 屠锋, 康超懿, 吴正清
doaj   +2 more sources

Research on Dynamic Characteristics of Monopile Offshore Wind Turbine Tower Under Different Wind Speed Conditions [PDF]

open access: yes
Based on the ANSYS finite element software, the NREL 5 MW monopile offshore wind turbine tower system was modeled in 3D. The influence of different wind speeds on the dynamic characteristics of the tower structure was simulated and analyzed under the ...
CHEN Shangnian   +4 more
core   +1 more source

T形钢管混凝土柱-H形钢梁侧接板式节点承载力研究

open access: yesJianzhu Gangjiegou Jinzhan
为研究T形钢管混凝土柱-H形钢梁侧接板式节点的受力机理,对该节点进行了有限元模拟和理论分析研究。首先建立Abaqus有限元数值模型,通过试验结果验证了数值模型的合理性;根据节点构造特点,推导了该节点的受弯承载力和受剪承载力计算公式,并采用数值模型算例进行验证;基于计算公式分析不同变量对节点受弯承载力和受剪承载力的影响。研究结果表明:给出的有限元模型能够有效模拟侧接板式节点的工作状态和极限承载力;侧接板式节点的受弯破坏有4种破坏形态,通过合理构造可以确保首先出现钢梁翼缘受拉屈服破坏,实现节点的延性破坏 ...
程卫红, 储德文, 时继瑞
doaj  

波纹腹板H形钢吊车梁局部承压承载力

open access: yesJianzhu Gangjiegou Jinzhan, 2013
为研究波纹腹板H形钢吊车梁在局部压力作用下的承载力,设计制作了5个试件。试验证明,试件的局压破坏形态为腹板的屈服,呈现出腹板由压力中心依次向两边先后屈服的特征,破坏过程中塑性特征明显。试验得到的极限承载力高于等厚度的平腹板钢梁。有限元方法能够较好地模拟构件的受力过程、极限荷载和破坏模式。经有限元参数分析发现,波纹越稀疏,承载力越低,腹板厚度,翼缘和腹板强度对承载力有直接影响,腹板高度无显著影响。基于研究,提出了设计表达式,经与试验和有限元结果对比,设计方法准确有效,且具有一定的安全储备。
张哲, 李国强, 孙飞飞, 周学军
doaj  

Exploration of the impacts of cement sheath on casing stress based on the arching effects of formations [PDF]

open access: yes
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

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