Results 51 to 60 of about 1,449 (106)
Dianci bileiqi, 2015 为确保±1100 kV/16 kN支柱瓷绝缘子抗弯性能满足要求,通过对样品的三节、四节、五节、六节进行整柱弯曲破坏负荷试验,摸索出多节产品在承受整柱破坏负荷时的应力变化。初步确定,在多节产品的设计过程中,等应力设计具有一定的不合理性。对±1100 kV/16 kN支柱瓷绝缘子的各节应力选取时,要有不小于10%的应力叠装系数。试验证明:选用此种应力分布设计的产品,满足整柱的抗弯性能要求,可以满足±1100 kV特高压工程的需要。
杨海 +6 more
doaj
Jianzhu Gangjiegou Jinzhan, 2018 三面受火钢柱可能发生绕强轴的弯曲失稳或绕弱轴的弯扭失稳,而两相邻面受火钢柱仅发生弯扭失稳。将钢柱截面温度场假设成简化的线性分布,对不均匀受火钢柱进行恒荷载升温分析,可得到钢柱发生整体失稳破坏时的临界温度。三面受火钢柱的临界温度与欧洲规范EN 1993-1-2的结果较为接近,可直接由EN 1993-1-2公式计算。对于两相邻面受火钢柱,可由EN 1993-1-2的计算结果乘以修正系数,文中给出了该修正系数的计算公式。
夏金环, 王培军, 周吉学
doaj
Jianzhu Gangjiegou Jinzhan为研究不锈钢筋-圆不锈钢管海砂混凝土构件的受弯性能，文中建立了该类构件的有限元分析模型。基于有限元典型算例，分析了其纯弯全过程的受力机理。并对该类构件进行了参数分析，系统研究了混凝土强度、钢管屈服强度、纵筋屈服强度、钢管含钢率和纵筋配筋率对该类组合构件纯弯性能的影响规律。研究结果表明：内置纵筋显著提高了该构件的抗弯承载力；且组合构件的抗弯承载力随混凝土强度、钢管屈服强度、纵筋屈服强度、钢管含钢率和纵筋配筋率的增大而增大；该组合构件的抗弯刚度随混凝土强度、钢管含钢率和纵筋配筋率的增大而增大 ...
李德山 +4 more
doaj
[Establishment and validation of a risk prediction model for scoliosis after Nuss procedure in children and young adults with pectus excavatum]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanLi B, Zhang Q, Sun Y.
europepmc +1 more source
[Advances in intra-abdominal vascularized lymph node transfer for treatment of limb lymphedema]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiChen Y, Deng C.
europepmc +1 more source
[Case Report of One Family With Coffin-Lowry Syndrome and Literature Review of 28 Cases in China]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanZhu D, Yang W, Zhang L.
europepmc +1 more source
Jianzhu Gangjiegou Jinzhan基于锁铆连接传力可靠、强度优异的特征，提出了一种新型的内置铆接开孔冷弯薄壁型钢混凝土组合梁。以底部铆钉间距、截面宽度为变量，对内置铆接开孔冷弯薄壁型钢混凝土组合梁开展了四点弯曲试验，考察了该组合梁的破坏特征、承载性能和延性指标，试验结果表明：新型组合梁受弯时表现出良好的延性性能；底部铆钉间距小的组合梁延性较差；增大截面宽度可提高组合梁的极限承载力。采用ABAQUS有限元软件对该组合梁进行参数分析，重点探究五大关键参数对其力学性能的影响：有无混凝土包裹、混凝土强度、顶部铆钉间距、底部钢板厚度及截面高度 ...
潘志宏 +4 more
doaj
[Thoughts and Prospects on Precision Control and Intelligent Positioning Robotic Systems Applied in Nasojejunal Feeding Tube Placement]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanQiu Y +9 more
europepmc +1 more source
[Finite element modeling and simulation study of solid-liquid biphase fiber-reinforced lumbar intervertebral disc]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiGao Y +5 more
europepmc +1 more source
[Prevalence and influencing factors of scoliosis among primary and secondary school students in Hunan Province, 2023]. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue BanZhou Y +6 more
europepmc +1 more source