Results 101 to 110 of about 4,276 (156)

220kV电力变压器短路动力学性能分析

Gaoya dianqi, 2014
电力变压器突发三相同时短路时,短路电流对变压器绕组动稳定性影响重大。笔者针对一台220 kV等级电力变压器,基于有限元电磁—结构耦合计算,运用动力学原理,研究短路电磁力作用下的低压绕组机械强度及变形过程。在电磁分析中,计算了各绕组的轴向和辐向电磁力,确定绕组中承受电磁力最大的线饼;在辐向应力应变分析中,以电磁力为激励,对选定绕组进行瞬态动力学计算,得出线圈的辐向动态应力及位移;在绕组轴向振动分析时,考虑线饼间绝缘垫块弹性模量,分析线饼轴向动态力和轴向位移。分析结果为变压器绕组短路强度校核提供参考依据。
闫振华, 马波, 马飞越, 张海军, 杨彬, 皇甫幼朋, 王国林   +6 more
doaj  

复合绝缘子不明闪络原因的实验分析

Gaoya dianqi, 2002
结合在实验室中进行的复合绝缘子沿面轴向电压分布试验和在线路试验工区的运行数据指出 ,复合绝缘子极度不均匀的轴向电压分布是引起不明闪络的一个重要因素 ...
朱宇, 江秀臣
doaj  

[Master manipulator of vascular intervention surgical robot based on haptic feedback]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Han G, Sun Z, Tang X.
europepmc   +1 more source

[Three-dimensional finite element analysis of the cantilever fixed bridge restoration for mandibular central incisors supported by narrow-diameter implants]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Zhou X, Gong Y, Peng W, Fu G.
europepmc   +1 more source

[Recent Research Progress and Prospects on Periodontitis Affecting Systemic Comorbidities via the Oral-Gut Axis]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Zhang S, Li Y, Yang Z, Huang H, Pan Y.
europepmc   +1 more source

[Effectiveness comparison of transforaminal endoscopy and unilateral biportal endoscopy for far lateral lumbar disc herniation]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang J, Feng B, Xu Z, Tian L, Dai G, Wang K, Hu P.   +6 more
europepmc   +1 more source

[Effect of composite graphene-protein hydrogels on neural regeneration after spinal cord injury in rats]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang Z, Fan Z, Wang X, Zhu Z.
europepmc   +1 more source

[Impact of lamina formation range on lumbar biomechanics in unilateral biportal endoscopic spine surgery: a finite element analysis for surgical optimization]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Ji S, Ma B, Zou Y, Zhang M, Ren M, Li H, Duan K, Xu C, Zhang C, Ye Y, Zhou P.   +10 more
europepmc   +1 more source

[Clinical application effects of the "three-source and four-line method" in the design and harvest of anterolateral lower leg perforator flaps]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Wu CL, Zhang Y, Cheng JN, Liu YC, Cao Y, Wang GY, Wang S, Dong S, Liu YF, Ju JH.   +9 more
europepmc   +1 more source

[Follow-up study evaluating morphological changes in alveolar bone in the maxillary anterior region after extraction retraction in adult patients treated with clear aligners on the basis of cone beam computed tomography data]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Hong X, Zhang W, Qi S, Yang L, Shen W, Liu J.   +5 more
europepmc   +1 more source