Results 31 to 40 of about 39,228 (133)

Simulation and Validation of an Incremental Bending Process for Cylindrical Fuselage Components

Aerospace, 2023
In the aviation industry, a large number of processes are not digitalised. Simultaneously, many special processes are used in production, such as incremental bending. In order to model and efficiently design multi-stage processes with methods such as FEM,
Jan Jepkens, Philipp Müller, Hendrik Wester, Sven Hübner, Simon Wehrmann, Bernd-Arno Behrens   +5 more
doaj   +1 more source

Influence of topology on the impact resistance performance of two-dimensionalchiral negative Poisson's ratio structures

Hangkong gongcheng jinzhan
Flexible materials to achieve deformable wing technology requires high mechanical properties of flexible materials，the existing research on chiral structures as flexible materials to drive deformable wings is based on the case of linear small ...
GENG Yitian, GUO Yingnan, YUAN Wei, ZHU Xiaojun   +3 more
doaj   +1 more source

Improvement of multi-channel active noise control algorithm for turboprop aircraft cabin

Hangkong gongcheng jinzhan
At present，the most widely used control algorithms in the field of active noise control（ANC）are the classical FxLMS algorithm and its improved algorithms，which are applied to noise control in large spaces and areas such as the turboprop aircraft cabin ...
SHEN Hao, XUE Qing, CHEN Tingyu, LI Jialu, SHEN Xing   +4 more
doaj   +1 more source

Investigation on vibration fatigue crack growth behavior of notched cantilever beams

Hangkong gongcheng jinzhan
Aviation aircraft will be subjected to a large number of complex random vibration loads during service， and its structure is prone to vibration fatigue，which leads to damage or even failure，which can cause serious losses.
ZHANG Borui, BAI Chunyu, LI Kaixiang, SONG Qiaozhi, MA Yu'e   +4 more
doaj   +1 more source

Research on sound insulation performance of the M-type folded core sandwich panel

Hangkong gongcheng jinzhan
As an advanced composite sandwich structure，the configuration of folded core is diverse，and previous research has mostly focused on the V-shaped folded core，while there is still relatively little research on the sound insulation performance of other ...
YE Yurui, WANG Zhijin
doaj   +1 more source

Tl1-xPbxCaSr2Cu2O7: Another 1122 high-Tc superconductor

, 1988
The 1122 member of the Tl(Ca, Sr)n+1CunO2n+3 system is stabilized by partial substitution of Tl by Pb. Tl1?xPbxCaSr2Cu2O7 with x=0.25 and 0.5 have both primitive tetragonal structures (c 12.1 Å) showing onset of superconductivity around 70 K and 90 K,
Rao, CNR, Ganguli, A. K., Nanjundaswamy, K. S., Nanjundaswamy, KS, Rao, C. N. R., Ganguli, AK   +5 more
core   +1 more source

Design and experimental investigation of perforated acoustic soft blade for counter-rotating propeller

Hangkong gongcheng jinzhan
The mechanism of contra-rotating propeller's aerodynamic noise is very complicated，and propeller-driven aircraft is not equipped passive noise reduction components such as nacelle liner to absorb noise during sound transmission，the noise generated by ...
YANG Jiafeng, NIE Yanping, YAN Qun, WEI Kai, XUE Dongwen   +4 more
doaj   +1 more source

Study on the ultra-wide band gap characteristics of novel star-shaped chiral metamaterials

Hangkong gongcheng jinzhan
The suppression of vibration and noise has always been an important issue in engineering，and metamaterials have shown significant application value in vibration and noise reduction.
WANG Shuo, YAN Qun, YAN Hao, SUN Yongtao, WANG Anshuai, ZHANG Zhaozhan, DING Qian, WANG Liang   +7 more
doaj   +1 more source

Особливості фотопровідність монокристалів Tl1-xIn1-xSnxSe2 при низьких температурах

, 2019
The photoconductivity spectra in the temperature range T≈36-200 K and the spectra of thermostimulated currents in the temperature range T≈70-300 K of Tl1-xIn1-xSnxSe2 single crystals obtained by directional crystallization of Bridgman ...
Piskach, L.V., Myronchuk, G.L., Piasecki, M.V., Novosad, O.V., Zamurueva, O.V., Danylchuk, S.P., Kityk, I.V., Tsisar, O.V.   +7 more
core   +1 more source

Theory of phantomization of radio images of SAR: basic information and justification of the sizes of the phantom area

Авіаційно-космічна техніка та технологія
The article's subject of study is the creation of the foundations of the theory of the formation of false elements in the images of aerospace radio vision systems by injecting informational signs of objects absent on the underlying surface.
Volodymyr Pavlikov, Pavlo Pozdniakov, Eduard Tserne, Denys Kolesnikov, Maksym Peretiatko, Pavlo Malashta   +5 more
doaj   +1 more source