Results 61 to 70 of about 3,100 (109)

具有T形截面的U形钢板阻尼器滞回性能理论分析与数值模拟

Jianzhu Gangjiegou Jinzhan
U形钢板阻尼器具有耗能能力良好、能够依靠自身变形耗能，以及性能稳定、制作方便、价格低廉等优点，但是也存在初始刚度小和承载能力低的问题。为此，提出一种具有T形截面的U形金属屈服阻尼器（简称阻尼器）。基于虚功原理和卡斯蒂利亚诺第二定理，建立了阻尼器的屈服承载力和初始刚度理论公式。基于非线性混合强化本构模型和三维延性断裂准则，建立了考虑材料延性断裂的阻尼器有限元模型。重点考察了阻尼器的刚度、屈服承载力、耗能能力和破坏模式等。通过参数分析量化了几何尺寸等参数对阻尼器力学性能的影响。研究表明，阻尼器在刚度 ...
邱灿星, 钱慧娟, 王苑佐
doaj  

[Advances in surgical management of severe hallux valgus]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yang F, Shi Z.
europepmc   +1 more source

["Chongqing experiences" in treatment of bone infections]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Xie Z.
europepmc   +1 more source

[Effectiveness of orthopedic surgery for 247 patients with moderate and severe hallux valgus]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang G, Yao J, Li W, Zhang L, Han Q, Rong C, Wei B, Zhang L.   +7 more
europepmc   +1 more source

[Research progress of meniscal centralization for degenerative medial meniscus extrusion]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhao Q, Niu X, Huang J.
europepmc   +1 more source

[Comparative study on effectiveness of the fourth-generation minimally invasive technique and Chevron osteotomy in treatment of hallux valgus]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Wang Q, Wang J, Ji D, Lin T, Zhao H.
europepmc   +1 more source

[Advances in application of digital orthopedic technology in total hip arthroplasty for developmental dysplasia of hip]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang B, Li H, Li M, Kong X, Chai W.
europepmc   +1 more source

[Research on the pathogenesis and treatment of diabetic foot ulcer wounds]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Wang X, Wang YY, Qi JW.
europepmc   +1 more source

基于MOPSO算法的超导限流器结构参数优化

Gaoya dianqi
电阻型超导限流器能够快速限制短路电流，因此常与直流断路器结合使用开断直流故障。超导限流器的性能与直流断路器元件参数之间存在复杂耦合关系，在一定直流断路器元件参数下的超导限流器的选型亟需研究。文中首先分析了现有超导限流器电阻的模型，然后仿真了超导限流器与直流断路器结合使用时的短路故障，分析了超导限流器电阻和回路电流的变化规律。仿真结果表明：超导限流器可成功限制故障电流的上升，帮助直流断路器开断故障电流；超导限流器的电阻、温度和电流波形之间存在复杂耦合关系。最后，固定超导带材的截面 ...
丁璨, 李江, 袁召, 余超捷
doaj  

[Deep transcranial magnetic stimulation coil design and multi-objective slime mould algorithm]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Xiong H, Zhu J, Liu J.
europepmc   +1 more source