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2016 Vol. 42, No. 2

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Volume 42 Issue22016
2016 Year 42 Volume 2 Issue E-journal
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Experimental analysis on micro-structure of three-dimensional full five-directional braided composites
LIU Zhenguo, YA Jixuan, LIN Qiang, WANG Yibo, HU Long
2016, 42(2): 211-217. doi: 10.13700/j.bh.1001-5965.2015.0084
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The micro-structure of three-dimensional (3D) full five-directional braided composite is investigated.Three-dimensional full five-directional braided composite is a new kind of braided composite. The micro-structure plays an important role in predicting performance of the material. Micro-computed to...
Transfer learning for activity pattern in smart environment
WANG Chengliang, WANG Yunpeng
2016, 42(2): 218-226. doi: 10.13700/j.bh.1001-5965.2015.0085
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Due to huge costs and operational difficulties in learning and mining activity patterns in smart environment, we propose a framework for activity pattern transfer. The process of activity pattern transfer is divided into two parts: trajectory transfer and trigger duration transfer. Firstly, fuzzify ...
Failure criterion and durability characteristics of metal rubber under static compression load
MA Yanhong, ZHANG Qicheng, ZHANG Dayi, ZHU Haixiong, LU Hongwei, HONG Jie
2016, 42(2): 227-235. doi: 10.13700/j.bh.1001-5965.2015.0081
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Metal rubber(MR) is widely applied in vibration control, vibration isolation and shock resistance areas because of its characteristics of elasticity, damping, reliability and adaptation to the operational environment. It is critical for the system safety to accurately define the failure criterion an...
Influence of hydro-ski load reducing performance corresponding on some parameters
GAO Xiaopeng, SUN Peicheng, DONG Zushun, WU Bin, WEI Keke
2016, 42(2): 236-242. doi: 10.13700/j.bh.1001-5965.2015.0079
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The impact load of amphibious aircraft could be reduced efficiently by use of hydro-ski, and the load reducing effect of hydro-ski is obviously relevant with some motion parameters of the aircraft. General coupling method was used to simulate the water landing performance of an amphibious aircraft a...
Pseudo-multi-source-sampling complex domain FastICA for impact location
YUAN Mei, NIU Ben, DONG Shaopeng, YU Liang
2016, 42(2): 243-250. doi: 10.13700/j.bh.1001-5965.2015.0096
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Using the sensor array to locate impact can help to detect damage and its potential threats for structure materials, and to ensure structural safety. Sensor array signals are preprocessed by blind source separation (BSS). A single-channel pseudo-multi-source-sampling method is proposed, and data seq...
Analysis on aircraft cylinder seal property based on mixed lubrication theory
OUYANG Xiaoping, XUE Zhiquan, PENG Chao, GUO Shengrong, ZHOU Qinghe, YANG Huayong
2016, 42(2): 251-257. doi: 10.13700/j.bh.1001-5965.2015.0387
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Aimed to investigate the influences of working conditions such as different pressures, temperatures and velocities on the performance of the seal of the aircraft cylinder, the Turcon VL seal from Trelleborg AB was analyzed based on the mixed lubrication theory. The macro and micro multi-field coupli...
Influence of rotor-stator interaction on rotor blade flutter characteristics
YANG Hui, LI Zhenpeng
2016, 42(2): 258-264. doi: 10.13700/j.bh.1001-5965.2015.0094
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A full-annulus multi-row coupled fluid-structure simulation on a certain high pressure compressor was conducted by an in-house program to analyze the influence of inlet guide vane (IGV) on rotor blade flutter stability in different operation conditions and geometry models. The effectiveness of the p...
Oil film analysis of swash plate/slipper pair based on CFD
MA Jiming, SHEN Yayong, LI Qilin
2016, 42(2): 265-272. doi: 10.13700/j.bh.1001-5965.2015.0107
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The 3-D Navier-Stokes equations and arbitrary Lagrangian-Eulerian (ALE) method are firstly used to present the oil film analysis method based on computational fluid dynamics (CFD), which can describe the correlation among slipper structure parameters, running conditions and oil film thickness. Then,...
Sequential-image-based space object 3D reconstruction
ZHANG Haopeng, WEI Quanmao, ZHANG Wei, WU Junfeng, JIANG Zhiguo
2016, 42(2): 273-279. doi: 10.13700/j.bh.1001-5965.2015.0117
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Space object 3D reconstruction is of important significance for both space situational awareness and theoretical study. A new structure from motion method was proposed to avoid the reconstruction error caused by the symmetrical structure and similar texture of space targets. In this method, new imag...
Simulation of prey stopping process by spider webs based on finite element method
YU Hui, YANG Jialing, LIU Hua
2016, 42(2): 280-286. doi: 10.13700/j.bh.1001-5965.2015.0089
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In order to discover the mechanical characteristics of spider webs to capture a flying prey, the actual stopping process is investigated based on the theoretical and finite element methods (FEM). First, the stress-strain relationships were built for radial silks and capture spirals in the orb web fr...
Test and numerical simulation on shear property of 3D braided composite straight pin
HU Long, LIU Zhenguo, WANG Yibo, LIN Qiang, YA Jixuan
2016, 42(2): 287-293. doi: 10.13700/j.bh.1001-5965.2015.0105
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Joining technique using composite fasteners is one of the key technologies for the manufacturing of composite structures. Test and numerical research on the shear property of 3D braided composite straight pin fastener is presented. Three-dimensional full five-directional braided technology is used t...
Calculation method of blade element aerodynamic loads based on small perturbation theory
WANG Wei, LI Dongsheng, LIU Chun
2016, 42(2): 294-302. doi: 10.13700/j.bh.1001-5965.2015.0087
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A calculation method of blade element aerodynamic loads based on small perturbation theory is established for helicopter flight simulation application. The method synthesizes flap-lag-torsion elastic rotor blade mode, couples rotor dynamic inflow, unsteady aerodynamics model with dynamic stall and r...
Representation of complex geological velocity model based on level set method
ZHANG Jianxing, YANG Qin, MENG Xianhai, LI Jigang
2016, 42(2): 303-309. doi: 10.13700/j.bh.1001-5965.2015.0106
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The difficulties in the expression of geological velocity model are the accurate description of complex geological phenomena and the effective support for the forward and inverse applications. We presented a novel representation method for describing velocity models. Velocity discontinuity was embed...
Object detection and segmentation algorithm in complex dynamic scene
XU Bing, NIU Yanxiong, LYU Jianming
2016, 42(2): 310-317. doi: 10.13700/j.bh.1001-5965.2015.0113
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In complex conditions of dynamic scenes, it is difficult to detect and segment objects accurately in image sequence. According to the image characteristics of the object in complex conditions, we propose an object detection and segmentation model which was fused with scale invariant feature transfor...
Tensile performances of mechanically fastened repairs of composite laminates
NIE Hengchang, TAN Riming, GUO Xia, GUAN Zhidong
2016, 42(2): 318-327. doi: 10.13700/j.bh.1001-5965.2015.0116
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Composite laminates with a damage hole, whose strength will reduce by about 55% under tensile loads, need to be repaired in order to recover their mechanical properties and meet the usage requirements. Mechanically fastened repair projects of composite laminates with a circular hole were designed an...
Gene backup number selection method for embryonics cell
ZHU Sai, CAI Jinyan, MENG Yafeng, PAN Gang
2016, 42(2): 328-336. doi: 10.13700/j.bh.1001-5965.2015.0122
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The existing structures of embryonics cell's genome memory were analyzed, and a reliability model was developed considering the effect of the gene backup number on self-repair process. The hardware overhead model was built depending on the implementations of genome memories. Based on the reliability...
Research on flying quality of unmanned helicopter
CHEN Nanyu, MENG Zhijun, HUANG Jun
2016, 42(2): 337-344. doi: 10.13700/j.bh.1001-5965.2015.0125
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Considering the growing attention for flying qualities of unmanned helicopter while with little work and poor results in this field, the basic aspects of flying quality requirements of unmanned helicopter were discussed systematically, from the view of automatic flying control, such as the definitio...
Analysis on contact characterizations of new looseproof pipeline connection
LIU Yu, WANG Jianjun
2016, 42(2): 345-350. doi: 10.13700/j.bh.1001-5965.2015.0131
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The contact characterizations of new lock pipeline connection, which is used in aircraft engine, were investigated in the installation and loosening process. Firstly, the entire installation and loosening process was divided into three stages. The friction and contact pressure in the three stages we...
Collocation interval analysis method for gust response
LYU Zheng, QIU Zhiping
2016, 42(2): 351-359. doi: 10.13700/j.bh.1001-5965.2015.0132
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Latest aircraft design advances have started to recognize the important significance of defining multiple types of uncertainty. An important issue faced in the previous aeroelastic theory is how to deal with uncertain parameters in gust and structure. We describe the governing equation of the struct...
Analysis on aerodynamic characteristics of morphing wing with flexible trailing edge
CHENG Chunxiao, LI Daochun, XIANG Jinwu, SHI Qinghua
2016, 42(2): 360-367. doi: 10.13700/j.bh.1001-5965.2015.0083
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The wing applying active variable camber trailing edge technology can improve aircraft's aerodynamic performance, and the study of aerodynamic characteristics is of great significance to the design of the morphing wing. Choosing the 2D variable camber wing with flexible trailing edge as the object o...
Failure mode and effects analysis method based on fuzzy TOPSIS
DU Hanheng, PENG Chong
2016, 42(2): 368-374. doi: 10.13700/j.bh.1001-5965.2015.0088
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Aiming at the defect of traditional failure mode and effects analysis (FMEA) in evaluating the effect factors of the failure mode and calculating the risk priority number, a FMEA method based on fuzzy technique for order preference by similarity to ideal solution (TOPSIS) is proposed. This method us...
Group-target signal separation based on time-frequency enhancement and total variation
LI Jingqing, FENG Cunqian, ZHANG Dong, CHEN Rong
2016, 42(2): 375-382. doi: 10.13700/j.bh.1001-5965.2015.0110
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To solve the problems of weak time-frequency orthogonality and the complexity of separation on group-target echo acquired by low-resolution radar, a group-target signal separation algorithm based on total variation (TV) is proposed as a precondition of time-frequency enhancement. The necessity of ti...
Evaluation and analysis method of aviation seat crashworthiness
LI Mengxiao, XIANG Jinwu, REN Yiru, ZHANG Xiaoyu, LUO Zhangping
2016, 42(2): 383-390. doi: 10.13700/j.bh.1001-5965.2015.0086
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In order to research the structural response characteristics of an aviation seat under crash scenarios, an evaluation and analytical method of aviation seat crashworthiness was proposed for a seat/occupant system. A finite element model of the seat was established based on actual seat geometry and r...
Thermal-structure coupling analysis and research of MSCMG
HAN Weitao, LIU Gang, SUN Jinji, TANG Jiqiang
2016, 42(2): 391-399. doi: 10.13700/j.bh.1001-5965.2015.0097
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As a novel actuator for spacecraft attitude maneuver, magnetically suspended control moment gyroscope (MSCMG) operates in a high vacuum with high speed rotor suspended, leading to poor dissipating heat conditions and high system temperature, which result in the larger thermal stress and weaken the s...
Effects of Ni particles with different morphologies on electro-optical properties of nematic liquid crystal
XU Lihong, ZHAO Dongyu, LIU Bin, ZHOU Wei, GUO Lin
2016, 42(2): 400-405. doi: 10.13700/j.bh.1001-5965.2015.0126
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Twisted nematic (TN) liquid crystal display mode cells doped with different Ni particles were prepared, such as Ni bowls-like particles, Ni flowers particles and Ni spheres particles. The effects of different Ni particles on the threshold voltage, saturation voltage, contrast ratio and response time...
5-axis tool path smoothing to improve machine tool motion
LI Xiaodong, NING Tao, CHEN Zhitong
2016, 42(2): 406-412. doi: 10.13700/j.bh.1001-5965.2015.0138
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An optimization model of tool path smoothing in 5-axis CNC machining is built to improve the machine tool acceleration condition in the tool path corner transition motion in linear interpolation. Considering the difference of the five axis acceleration abilities, the ratio of one axis' maximal accel...
Fractional tap-length algorithm for adaptive filters under maximum correntropy criterion
LIU Chunhui, QI Yue, DING Wenrui, ZHANG Wenqiu
2016, 42(2): 413-420. doi: 10.13700/j.bh.1001-5965.2015.0137
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Accurate estimation of the optimum tap-length for the adaptive filter provides a good balance between the steady-state performance and the complexity of the adaptive algorithm. The convergence performance of the variable tap-length least mean square (LMS) adaptive filters under the minimum mean squa...

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