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Bian W.-F.,Harbin Institute of Technology | Wu Z.-Y.,Zhongfu Xigang Ship Co. | Bai G.-H.,Harbin Institute of Technology | Bai G.-H.,China Aviation Optical Electrical Technology Co. | Miao H.-W.,Zhongfu Xigang Ship Co.
Gongcheng Lixue/Engineering Mechanics | Year: 2012

One effect from an underwater explosion on ship hulls is the direct pressure, and the other is to create acceleration. Furthermore, the acceleration is not only created by ship hulls, but also by additional mass, which is also known as additional water mass, namely the explosion changes momentum and kinetic energy of ship hulls and additional mass at the same time. The research on a structure under an underwater explosion is very complex and has a huge quantity of calculation. For the purpose of selecting a composite hull structure, explosion loading is equivalent to static loading by means of an energy principle, the momentum principle and d'Alembert principle. According to the response of five different hull structures to equivalent loading, we select a hull structure. To the same molded lines of five different hull structure forms as longitudinal framing, transverse framing, a combined system, a hard-shell form and a sandwich form, the same loading and equal weight as a condition, the ship's response created by an equivalent underwater explosion loading need to be analyzed by the finite element method. With the analysis of ship's stress and displacement, we compare the strength, rigidity, section modulus and comprehensive performance of a ship to provide a numerical analysis reference for a structure selection. One structure form should be selected not only conforms to a structural performance, but also satisfies the use requirement.


Zhou X.,Dalian University of Technology | Yao Q.,China Aviation Optical Electrical Technology Co. | Chen K.,Dalian University of Technology | Gong Z.,Dalian University of Technology | And 2 more authors.
Optical Engineering | Year: 2016

Optical loss of fiber-optic connectors has a vital impact on fiber-optic-related systems. We analyze the contact loss caused by the endface geometry and the contact force. Based on analytical and simulated results, the analytical equations of the insertion loss (IL) and return loss (RL) as a function of the endface geometry and the contact force are derived. Then four fiber-optic connectors are experimentally tested. The experimental results are well consistent with the theoretical results, which show that there is an optimum relationship between the endface geometry and the contact force to ensure a low IL and a high RL. © 2016 Society of Photo-Optical Instrumentation Engineers (SPIE).


Li Y.,University of Science and Technology Beijing | Zhang J.,University of Science and Technology Beijing | Zhang J.,Beijing Tongda Refractory Technologies Co. | Li J.,University of Science and Technology Beijing | And 4 more authors.
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | Year: 2013

The Al-Al2O3 composite sliding gate with a transient phase (Cr2O3) was prepared with tabular alumina, fused white corundum, fine powder of Cr2O3, metal Al as starting materials and phenolic resin as a binder. The results show that Cr2O3 is unstable when sintered under carbon burial at 1450°C for 6 h. It can transform to Cr3C2, Cr7C3 or Al8Cr5 intermetallic compound, and its existing state depends on the Cr2O3 quantities. The composite sliding gate contains (Al2OC)1-x(AlN)x, Al4O4C, Cr3C and Cr7C3 as reinforcement phases and Al8Cr5 as a plastic phase. It is indicated that the main composition of sliding gate is Al-Al4O4C-Al2O3 at Cr2O3 of 3% (in mass, the same below); the main composition of sliding gate is Al8Cr5-(Al2OC)1-x (AlN)x-Al2O3 at Cr2O3 of 6%, 9% and 12%, respectively; and the main composition sliding gate is Al8Cr5-Al2O3 at Cr2O3 of 15%. Al8Cr5-(Al2OC)1-x (AlN)x-Al2O3 system has the superior physical properties at Cr2O3 of 6%.


Li Y.,University of Science and Technology Beijing | Zhang J.,University of Science and Technology Beijing | Li J.,University of Science and Technology Beijing | Li J.,China Aviation Optical Electrical Technology Co. | And 3 more authors.
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | Year: 2013

A high performance Al-Al2O3 metal and oxide composite carbon-free sliding gate was prepared under carbon burial at 1450°C for 6 h via a transient plastic phase process using tabular alumina, fused white corundum, α-Al2O3 fine powder and a fine Al powder as raw materials and phenolic resin as binder. The composite samples with Al content of 9% in mass had the optimum comprehensive physical properties. The apparent porosity, bulk density, cold crushing strength and hot bending strength of the samples heated at 1400°C for 30 min were 4.1%, 3.27 g/cm3, 410 MPa and 60.7 MPa, respectively. The performance of the composite sliding gate prepared via the control of chemical reaction and calcining atmosphere was superior. Al reacted with both C and CO mixed with N2 could form Al4C3 and AlN, and Al4C3 continuously reacted with Al2O3 to form Al4O4C, Al2OC reinforcement phase and the remaining free Al as a metal plastic phase. The Al-Al2O3 composite sliding gate had a high chemical stability and a low oxygen potentiality, without any free C and hydrated Al4C3, which could be applied to clean steel production process, and the secondary C, O, H and other impurities from the sliding gate could not appear during the operation.


Yi-Min H.,Luoyang Optical Electrical Development Center | Seng G.,Luoyang Optical Electrical Development Center | Wei W.,Luoyang Optical Electrical Development Center | Jie H.,China Aviation Optical Electrical Technology Co.
Nuclear Engineering and Design | Year: 2012

The natural frequency equations of fluid-structure interaction in pipeline conveying fluid with both ends supported is investigated by a direct method, and the direct method is derived from Ferrari's method which is used to solve quartic equations. The dynamic equation of pipeline conveying fluid with two variables is obtained by Hamilton's variation principle based on Euler-Bernoulli Beam theory. By using the separation of variables method and the derived method from Ferrari's method, the natural frequency equations and the critical flow velocity equations of pipeline conveying fluid with both ends supported are obtained in mathematical decoupling. Each order natural frequencies and critical flow velocities can be obtained by using numerical method. The first five order dimensionless critical flow velocities are obtained, and the results indicate that clamped-simply supported is less stable than clamped-clamped supported and more stable than simply-simply supported. All the conclusions can be applied to nuclear installations and other engineering fields of improving the vibration. © 2012 Elsevier B.V. All rights reserved.


Chen X.Y.,Northwestern Polytechnical University | Zhao N.,Northwestern Polytechnical University | Cai Y.Z.,CHINA Aviation Optical Electrical Technology Co. | Yan Z.J.,CHINA Aviation Optical Electrical Technology Co. | Wang Y.Z.,CHINA Aviation Optical Electrical Technology Co.
Applied Mechanics and Materials | Year: 2012

In order to solve centralized installation and cooling problems of airborne electronic equipment with big power and high heat flow density in aircraft, the paper put forward an innovative closed-loop forced ventilation cooling system, expatiated system compositions and operation principles, and also took a cabinet system for example to introduce new cooling system design method and simulation results.


Patent
Huawei and China Aviation Optical Electrical Technology Co. | Date: 2013-01-16

The embodiments of the present invention provide a plug and a power connector. The plug is applied in a power connector connected between a power supply device and a radio frequency module. The plug includes a jack and a crimping component set at a tail end of the jack, and the crimping component is configured to connect a power cable introduced from the power supply device to the jack in a manner of fixing. A power connector that includes the plug is further provided. By using the technical solutions according to the embodiments, easy on-site installation of the power connector that includes the plug during use may be ensured.


Patent
China Aviation Optical Electrical Technology Co. and Huawei | Date: 2013-10-18

The embodiments of the present invention provide a plug and a power connector. The plug is applied in a power connector connected between a power supply device and a radio frequency module. The plug includes a jack and a crimping component set at a tail end of the jack, and the crimping component is configured to connect a power cable introduced from the power supply device to the jack in a manner of fixing. A power connector that includes the plug is further provided. By using the technical solutions according to the embodiments, easy on-site installation of the power connector that includes the plug during use may be ensured.


Trademark
China Aviation Optical Electrical Technology Co. | Date: 2010-03-02

Optical apparatus and instruments, namely, electronic optical transmitters; electric cell change-over switches for telecommunications apparatus; pottery filters, namely, ceramic filter connectors for electronic circuits, namely, ceramic filters for radio interference suppression, to filter noise, resist to Commons Mode Interference and shield electromagnetism interference in order to keep the signal transmission stable; electric connectors; electric contacts of precious metal; electric switches; connections for electrical lines; electric connections; electric wire connectors; electric junction boxes; electric contacts; electric connections, namely, plugs, sockets and other contacts.


Patent
China Aviation Optical Electrical Technology Co. and Huawei | Date: 2013-06-17

The embodiments of the present invention provide a plug and a power connector. The plug is applied in a power connector connected between a power supply device and a radio frequency module. The plug includes a jack and a crimping component set at a tail end of the jack, and the crimping component is configured to connect a power cable introduced from the power supply device to the jack in a manner of fixing. A power connector that includes the plug is further provided. By using the technical solutions according to the embodiments, easy on-site installation of the power connector that includes the plug during use may be ensured.

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