Results 91 to 100 of about 16,165 (285)

Helicopter blade morphing strategies aimed at mitigating environmental impact | Strategie aktywnego kształtowania profilu łopat helikoptera w celu redukcji negatywnego wpływu ich pracy na środow

, 2011
The requirement of mitigating the environmental impact of helicopters has been addressed globally within the FRIENDCOPTER Project in the sen- se that several aspects (such as noise abatement, vibration reduction, fuel consumption) have been studied in
Prachǎr, Ales, Zachariadis, Zacharias, Pagano, Antonio, Ameduri, Salvatore, Cokonaj, Valerijan, Drikakis, Dimitris   +5 more
core   +1 more source

Analysis on Torsional Fatigue Life of Turbo-Generator Shafts

, 2011
Both low-cycle fatigue and high-cycle fatigue exist during torsional vibrations, but the impact of high-cycle fatigue has rarely been considered. In this paper, a torsional fatigue life analyzing method used for torsional vibration of turbo-generator ...
Yu Jiong Gu, Tie Zheng Jin
core   +1 more source

Working Characteristics of Mechanical Composite Impactor

Shiyou jixie
Conventional impactor works with hydraulic impulse,which may induce erosion to impact the working life of the impactor.To this end,a mechanical lifting and disc spring energy storage impact method was proposed and a mechanical composite impactor was ...
Sun Yangqing, Yi Xianzhong, Wan Jifang, Yi Jun, Wu Jiwei, Diao Binbin, Chen Zhixiang   +6 more
doaj  

CLUNK PHENOMENA ANALYSIS OF AUTOMOBILE TRANSMISSION SYSTEM BASED ON TORQUE ABRUPT CONDITION

Jixie qiangdu, 2020
Through the analysis of the transmission mechanism of the vehicle transmission system,the torsional vibration model of the 12-DOF multi-gap nonlinear powertrain system was established,and the transient shock response characteristics under various working
ZHANG ZhiGang, PENG YuanPing, YU XiaoXia, ZHANG Yun   +3 more
doaj  

Linker‐Engineered Dimeric Acceptors Afford Efficient Organic Photocatalytic Hydrogen Evolution via Tailored Nanomorphology for Long‐Lived Charge Accumulation

Advanced Materials, EarlyView.
We developed a new series of monomeric (MY) and dimeric acceptors incorporating unfused (DY1) and fused (DY2) linkers, which establish a controlled self‐aggregation trend of MY > DY2 > DY1. The DY2‐based system yields a bulk‐heterojunction nanoparticle morphology that appears to balance phase separation and interfacial accessibility, consistent with ...
Jin‐Woo Lee, Cheng Sun, Yang Song, Guanru Dong, Keren Ai, Stanley Alfred Cazaly, Flurin Eisner, Bumjoon J. Kim, Zeinab Hamid, Iain McCulloch, Yun‐Hi Kim, James R. Durrant   +11 more
wiley   +1 more source

All‐Polyimide‐Mediated Liquid Metal Assembly on Aerogels for Breathable and Robust Electronic Skins

Advanced Materials, EarlyView.
An all‐polyimide‐mediated assembly strategy resolves the fundamental conflict between physiological breathability and electromechanical robustness in wearable electronics. By integrating a polyamic acid‐encapsulated liquid metal ink onto an ultralight polyimide aerogel, imidization‐induced contraction enables low‐temperature conductive activation and ...
Haijun Zhu, Jiancheng Dong, Hao Qiu, Je Hyeong Kim, Xingyu Liu, Shiyin Lin, Mengting Zheng, Chang Zhou, Yuduo Zhang, Jiayu Hou, Kangjia Geng, Yuchen Wang, Yidong Peng, Haoran Liu, Guanzheng Wu, Yunpeng Huang, Yongsheng Luo, Steve Park, Tianxi Liu   +18 more
wiley   +1 more source

Hole-Vibronic Coupling in Oligothiophenes: Impact of Backbone Torsional Flexibility on Relaxation Energies

, 2007
peer reviewedDensity functional theory calculations together with highly resolved gas-phase ultraviolet photoelectron spectroscopy have been applied to oligothiophene chains with up to eight thiophene rings.
Gruhn, N.E., da Silva Filho, D.A., Gierschner, J., Bill, T., Brédas, Jean-Luc, Coropceanu, V., Fichou, D., Cornil, Jérôme   +7 more
core   +1 more source

Structural Design and Performance Analysis of Novel Torsional Impact Tool

Shiyou jixie, 2017
The existing impact and rotary-impact rock breaking technology mostly use the axial impact and the shear action of the PDC bit to achieve high-efficiency rock breaking, but excessive axial force will cause the failure of PDC bit shear force, resulting in
Fu Chuanhong, Chen Zhiqiang, He Yong, Wei Daifeng, Liu Kaiquan, Hu Jing   +5 more
doaj  

High Center‐of‐Mass, Multi‐Legged Soft Robots Powered by Geometrically Encoded Liquid Crystal Elastomer Arc Appendages

Advanced Materials, EarlyView.
Inspired by the octopus and the golden wheel spider, soft robots with liquid crystal elastomer arc fibers as appendages are fabricated to transcend surface constraints through an elevated center of mass and minimal contact footprints. By leveraging curvature‐encoded deformation‐recovery cycles, these robots exhibit contractile, torsional, and flexural ...
Jong Bin Kim, Antonio Proctor Martinez, Yaoye Hong, Ziyun Zhang, Kun‐Yu Wang, Shu Yang   +5 more
wiley   +1 more source

IMPACT OF ELECTRICAL NOISE ON THE TORSIONAL RESPONSE OF VFD COMPRESSOR TRAINS [PDF]

, 2011
LectureThe popularity of VFD motors in compressor trains has increased in recent years. Increased process flexibility is a primary consideration for implementation of VFD systems.
Kocur, John, Muench, Maximilian
core