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2003 Vol. 29, No. 11

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Numerical study of flow around a main cylinder by controlled satellite cylinders
Lee Chunhian, Peng Shaobo, Wu Ziniu
2003, 29(11): 951-958.
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Abstract:
Vortex shedding behind circular cylinder, when placing single or multiple secondary, much smaller cylinders in the near wake of the main cylinder, was numerically investigated using overlapping grids in conjunction with a domain decomposition method for the compressible Navier-Stokes equations. The ...
Advanced technologies of the integrated aircraft utility system and ECS
Wang Jun, Liu Yongji, Dong Sujun
2003, 29(11): 959-963.
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Abstract:
Two trends of the aircraft utility system integration technology of USA are introduced. The concepts of its key technologies, such as the integrated utilities management system, more electric aircraft, "hot fuel tank" integrated fuel system, integrated power unit and thermal/energy management module...
Study on the dynamic plastic response and failure of structure modeling aerospace vehicle
Yang Jialing, Zhang Ya, Liu Xuhong
2003, 29(11): 964-969.
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Abstract:
The advances in the study on the dynamic plastic response and failure of structure modeling the aerospace vehicle subjected to intense dynamic loading are reviewed. Attention is focused on the basic research progress made by the authors and their cooperators in recent years in the study by using rig...
Unsteady lift mechanisms and energetic in flying insects
Sun Mao, Wu Jianghao
2003, 29(11): 970-977.
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Recently, the interest has been developed in small autonomous flying vehicles. There already exist such autonomous MAVs(micro\|air vehicles) in nature: the insects. In the design of small flying machines, it is very helpful to understand first how these small animals fly. The achievements of the las...
Brief review of studies on the mechanical behavior of metallic foams
Lu Zixing, Guo Yu
2003, 29(11): 978-983.
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A brief review of studies on the mechanical properties of metallic foams is given. The emphasis is placed on the development of investigations into mechanical properties of metallic foams in recent years, including some works of this field in our country. They are mainly concerned with the tensile a...
Experimental investigations of the respective and synergistic effects of vacuum ultraviolet radiation and atomic oxygen on a spacecraft material——Kapton
Shen Zhigang, Zhao Xiaohu, Xing Yushan, Ma Shulin
2003, 29(11): 984-987.
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Kapton is a commonly used spacecraft material, on which the experiments are constructed to investigate the VUV (vacuum ultraviolet radiation) effects and its synergistic effects with AO (atomic oxygen) in a ground-based simulation facility. The sample materials before and after the tests are compare...
Static analysis of hybrid smart composite structures
Wang Jun, Li Zhengneng, Wang Junbing
2003, 29(11): 988-992.
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A hybrid smart structure integrated with shape memory alloy slims and piezoelectric ceramic patches as united actuators, was presented and modeled by finite element methods. Being bonded to its surface or embedded in the laminate, the piezoelectric ceramic patches was treated as a certain layer whil...
Variable strategy pilot model of carrier landing approach
Qu Xiangju, Cui Hailiang
2003, 29(11): 993-997.
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A variable strategy pilot model for carrier landing approach is presented. The model was integrated with two components: a discontinuous component of the acquisition strategy for a large deviation of glide path and a continuous component of pursuit tracking strategy for a small deviation. The variab...
Servo-elasticity test of an aircraft with the flight control system
Zhang Junjie, Yang Chao
2003, 29(11): 998-1000.
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To discover the servo-elasticity stability nature of an aircraft equipped with a flight control system, some active-control-system/structural dynamics interaction tests on it have been performed. The test principle and test method was described. Some typical test results have been presented and comp...
Properties of stitched composite laminates——the principle properties of simple laminates
Cheng Xiaoquan, Zhao Long, Zhang Yining
2003, 29(11): 1001-1005.
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In order to solve the application of stitched composites in aircraft structures, experimental studies were carried out on the effect of stitching and stitching directions on tensile and compressive properties of unidirectional laminates and cross-ply symmetric laminates made of uniweave T300/QY9512....
Robust reliability of structural vibration
Wang Xiaojun, Qiu Zhiping
2003, 29(11): 1006-1010.
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Abstract:
Based on the conventional probabilistic design methods of structural vibration, modeling uncertain variables as interval (hyper-rectangle), a non-probabilistic interference model between the exciting frequencies and the natural frequencies of a structure was established and a non-probabilistic metho...
Researches on the resolution of fast large time step entropy condition scheme
Dong Haitao, Lee Chunhian
2003, 29(11): 1011-1016.
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Abstract:
A method of high resolution fast large time step entropy condition scheme is designed. A class of entropy schemes is studied with shock tube problems for numerical examples. Numerical experiment is carefully designed to study the accuracy, time step, and limiters of the schemes. The quality of diffe...
Improvement of taxing performance for civil airliner by active control
Jia Yuhong, Liu Ying
2003, 29(11): 1017-1021.
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Abstract:
Based on two performance indexes of vertical acceleration and vertical displacement of body, by the non-linear model of self-tuning of landing gear and the ARAMX model of system, using the design of controller of the multi-step recursive predictor and the identification of the model parameters and s...
Research on scheme effect of computational fluid dynamics in aerothermal
Li Junzhe, Yan Chao, Ke Lun, Zhang Shuting
2003, 29(11): 1022-1025.
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Abstract:
The hypersonic flows around the two-dimension cylinder and three-dimension biconic are simulated by solving the N-S equations with computational fluid dynamics(CFD) method to get the heat transfer rate. For solving the N-S equations, Roe's FDS scheme, Van leer's FVS scheme, AUSM+ scheme and a center...
Design, modal analysis and tests of composites wing box
Liu Bingshan, Yan Ying, Qian Wei, Duan Yuexin
2003, 29(11): 1026-1028.
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A scaling-down wing-box model was designed on the basis of structural similarity and manufactured by means of integral-forming of composites for modal analysis and test, in which the similarity of structural dynamics and loading transfer were realized at the same time. The modal analysis and test wa...
Equivalent inter-phase model of dynamic response to thin layer of different mechanical properties in engineering structures
Zhang Jin, Li Zailiang
2003, 29(11): 1029-1032.
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The dynamic response of an infinite long elastic rod with a thin layer of different mechanical properties has been investigated. Three equivalent inter-phase models of elastic thin layer have been used: simple spring, spring plus mass and modified spring. The dynamic response of the rod has been sim...
Unsteady structures over delta wings
Zhu Liguo, Lü Zhiyong
2003, 29(11): 1033-1037.
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Abstract:
Visualization with light sheet and PIV tests were performed to investigate some unsteady structures over delta wings. Discrete sub-vortices in the vortex sheet, interaction of the secondary vortex with main vortex, the frequency characteristics of the spiral form of vortex breakdown, the fluctuation...
Study of active shape control of SMA reinforced composites and the neural network model
Zeng Shenchang, Mai Hanchao, Wu Sheng
2003, 29(11): 1038-1041.
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NiTi SMA wires were embedded in the composite laminate beyond the neutral layer, and by electric current, they are heated up to produce the large recovery force. Consequently, the bending deformation of SMA reinforced structure is achieved. Due to the nonlinear behavior of SMA and the complexity of ...
Research on integrated flight/propulsion control design
Jiang Zaiming, Zhang Shuguang
2003, 29(11): 1042-1046.
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Abstract:
A decentralized approach was set up for integrated flight/propulsion control(IFPC) design. Based on the gliding slope and terrain-following(TF) missions, the structures of compensators were firstly determined. The linear quadratic optimization with output feedback method was applied to determine the...
Application of wavelet transform for laminate real time injuries measuring
Lu Dawei, Li Shu
2003, 29(11): 1047-1050.
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Abstract:
The wavelet analysis is adopted in this article for dealing with the signal. The main subject is calculating the dynamics response of samdwich board. Then decompose the structure response signal with wavelet tools after deducing the annoyance. The real-time monitoring for composite material is carri...
Research of target identification based on cognitive characteristic
Zhuang Damin, Wang Rui
2003, 29(11): 1051-1054.
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Abstract:
To optimize the design of plane's human-machine interface, assume the shape, size and responding time of target(character or mark) according to human cognitive characteristic, and analyse and validate it by two-dimension target identification experiment. The result of experiment suggests that the qu...
Research on droplet impingement property of rotor blade in hover
He Zhi, Chang Shinan, Yuan Xiugan
2003, 29(11): 1055-1058.
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The numerical method of determining the water droplet impingement property of rotor blade in hover was studied. According to the quasi-steady property, the rotor's model in hover was simplified. Based on the calculation of flow field around the blade, the droplet trajectories were obtained through t...

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