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2020 Vol. 63, No. 20
Published: 2020-10-15
FEATURE
FORUM
C0NTENTS
COVER STORY
APPROACHING SCIENCE
SPECIAL TOPIC
 
       FEATURE
14 Overview of Research on Elongation Prediction and Control Technology for Shot Peening of Integral Wing Panel
ZHANG Wei,SHI Kaojun,ZHANG Jiabin,XU Gang,YANG Hui
DOI: 10.16080/j.issn1671-833x.2020.20.014
Shot peening is a key problem that puzzles the precise forming of large integral wing panels. It is difficult to predict and control the development of elongation only considering shot peening forming and strengthening. This paper analyses the factors that affecting the precision control of shot peening elongation from the aspects of slab processing technology, processing environment and shot peening technology comprehensively, and summarizes the research method on shot peening extension prediction and slab development. These research methods provide systematic technical guidance and theoretical reference for solving the fluctuation of shot peening forming dimension extension, and is of great significance for improving the forming efficiency and accuracy of integral wing panels.
2020 Vol. 63 (20): 14-19 [Abstract] ( 222 ) HTMLNew PDF (2136 KB)  ( 391 )
       COVER STORY
20 Digital Twin and Design Knowledge Library-Driven Aircraft Assembly Line Design and Application
CHANG Xiao, JIA Xiaoliang, LIU Kuo
DOI: 10.16080/j.issn1671-833x.2020.20.020
Aircraft assembly line design has many influencing factors and complex relationships. Traditional design methods are usually difficult to quantitatively, accurately and visually analyze the aircraft assembly line design, and it is difficult to effectively discover the problems in the design scheme. This paper introduces digital twin technology to carry out research on the design and application of aircraft assembly line. By establishing the interactive environment and carrier of the design and operation for the digital twin aircraft assembly line, the real-time and accurate simulation analysis of the workflow, information flow and logistics of the aircraft assembly line is carried out to improve the quality and performance. Meanwhile the construction of aircraft assembly line design knowledge library is studied to support the modeling and simulation analysis of digital twin aircraft assembly line, which shortens the design cycle and improves the design efficiency. Through the practical application of digital twin driven design method in an aircraft fuselage assembly line design, the problems in workflow, logistics and layout were found effectively. According to quantitative simulation analysis of the capacity, station utilization and bottleneck of the digital fuselage assembly line, the line is optimized, and the quality and performance of the design are improved.
2020 Vol. 63 (20): 20-28 [Abstract] ( 365 ) HTMLNew PDF (9129 KB)  ( 461 )
       FORUM
32 Exploration and Practice of Overall Design Mode of Aircraft Mobile Assembly Line
YANG Wen,GENG Junhao
DOI: 10.16080/j.issn1671-833x.2020.20.032
In order to meet requirements of the rapid growth of types and amount of aircrafts in China, and building assembly lines of aircraft manufacturing enterprises, this paper proposed a overall design mode of aircraft mobile assembly line, and gave its overall framework, target elements, main process and construction content. This mode can be used as a reference for the construction of mobile assembly line of aircraft assembly, maintenance and other similar products. The mode has been applied to the mobile assembly line construction of a domestic aircraft, and achieved good results, which shows the effectiveness of the mode.
2020 Vol. 63 (20): 32-39 [Abstract] ( 228 ) HTMLNew PDF (13582 KB)  ( 259 )
45 Design and Analysis of Circumferential Track Drilling System for Large Aircraft Fuselage Docking
LIAO Haipeng, JIANG Junxia, ZHANG Xinyuan, DONG Qun, TAO Bangming
DOI: 10.16080/j.issn1671-833x.2020.20.045
To solve the key problems such as low efficiency, large error and poor quality for drilling in fuselage docking area of large aircraft assembly in China, a new type of automatic drilling device-circumferential track drilling system was designed and analyzed in this paper. Firstly, assembly line of large aircraft and the requirements of fuselage docking were introduced, and the advantages and drawbacks of various automatic drilling technologies were analyzed and compared. Secondly, the design scheme of circumferential track drilling system was given, the working process and structure of circumferential track, arc track and end effector and so on were described in detail. Thirdly, the overall layout of circumferential track was proposed, and the theoretical calculation method for the preload of supporting feet was proposed through the force analysis of circumferential track. Finally, a design example was given, finite element software was used to solve the deformation of circumferential track, and a test platform for circumferential track drilling system was built to verify drilling effect of the system. Results show that circumferential track drilling system works stably and can meet the requirements of drilling in aircraft fuselage docking area.
2020 Vol. 63 (20): 45-53/60 [Abstract] ( 173 ) HTMLNew PDF (6534 KB)  ( 430 )
54 Key Technologies of Digital Simulation and Optimization of Aircraft Assembly Pulsation Line
YAN Jinfeng
DOI: 10.16080/j.issn1671-833x.2020.20.054
Based on the project of aircraft assembly pulsation line, this paper studies the detailed method and process of the planning of the pulsation assembly line. Through the research of the digital design and optimization method of the aircraft assembly pulsation line, the research ideas of the key technologies of process optimization and production line simulation are analyzed. Moreover, the application in the project of the key technologies is introduced.
2020 Vol. 63 (20): 54-60 [Abstract] ( 239 ) HTMLNew PDF (4428 KB)  ( 724 )
       APPROACHING SCIENCE
62 Focus on Basic Technology Research, Enhance the Development of Laser Intelligent Manufacturing
2020 Vol. 63 (20): 62-63 [Abstract] ( 114 ) HTMLNew PDF (1353 KB)  ( 60 )
       SPECIAL TOPIC
64 Dynamic Response Characteristics of Large Amphibious Aircraft
Lü Jihang, ZENG Yi, YANG Rong
DOI: 10.16080/j.issn1671-833x.2020.20.064
In the design of amphibious aircraft, dynamic response characteristics of the elastic aircraft should be considered. According to the working modes and using characteristics, dynamic response characteristics of the large amphibious aircraft when taking off and landing on water, encountering symmetrical / asymmetric gust and landing are analyzed by numerical calculation method, and dynamic loads response of the structures in various using environments are solved. Results show that limited dynamic loads of the local positions are notable larger than the static loads due to dynamic response for the large amphibious aircraft, so dynamic loads must be used to additional design and check for the structural strength. Analysis results provide important reference for structural design of the large amphibious aircraft.
2020 Vol. 63 (20): 64-69 [Abstract] ( 169 ) HTMLNew PDF (2698 KB)  ( 373 )
70 Application Research of Corrosion Prevention and Control Technology in Development of Amphibious Aircraf
LI Chao, FENG Wanxi
DOI: 10.16080/j.issn1671-833x.2020.20.070
In order to meet the technical requirements of amphibious aircraft flight safety, total life of the fuselage structure and the interval between repairs, for the harsh operating environment of the amphibious aircraft and the characteristics of the failure of the protection system of the typical structural parts of the aircraft, refer to similar domestic and foreign protection technology methods, according to corrosion Pre-research results of protection and control, comprehensive governance of the SH–5 Maritime Bomber and domestic and foreign civil aircraft engineering application experience, comprehensive consideration of specific engineering applications, through materials selection, surface protection, anti-corrosion sealing, ventilation and drainage, corrosion inhibitor selection and other technologies application research, we carry out the application research on corrosion protection and control technology of amphibious aircraft according to the corrosion protection thought of the whole life cycle. Up to now, the surface protection and sealing of the base structure are normal and effective. The results of the selection and verification of the protection system and the water-tight and oil-tight tests show that the application of this protection technology has achieved the anti-corrosion development goal of the first renovation of 6 years.
2020 Vol. 63 (20): 70-79 [Abstract] ( 166 ) HTMLNew PDF (4983 KB)  ( 632 )
80 Analysis of Difficulties in Designing Emergency Water Delivery Function of Large Firefighting/Water Rescue Amphibious Aircraft
LIANG Zi,BIAN Baolong,REN Shiyou,JIANG Rong
DOI: 10.16080/j.issn1671-833x.2020.20.080
One of the main uses of large firefighting/water rescue amphibious aircraft (herein after referred to as AG600 aircraft) is to meet the needs of forest firefighting missions in areas with high fire incidence such as northeast and southwest China. Its firefighting mission system is designed with a 12t water tank. CAAC believes that failure to consider emergency return landing (water) capability in aircraft development may lead to unsafe conditions. From the perspective of safety analysis of the whole aircraft, relevant analysis and evaluation are carried out on the design difficulties in setting emergency water delivery function for the firefighting type of AG600 aircraft, and solutions to improve the safety of the aircraft under failure state are proposed.
2020 Vol. 63 (20): 80-85 [Abstract] ( 137 ) HTMLNew PDF (1753 KB)  ( 400 )
86 Study on Influence of Blowing Boundary Layer Control System on Weight and Balance of Amphibious Aircraft
XIA Mingguang, DAI Shilong, CHENG Zhihang, LIU Xuan
DOI: 10.16080/j.issn1671-833x.2020.20.086
The blowing boundary layer control system can improve the maximum lift coefficient of the wing and rudder surfaces in the process of taking off and landing, however, the increase of maximum lift coefficient can reduce the water landing load of amphibious aircraft. The influence of water landing load of amphibious aircraft on the weight of aircraft hull and float structure was researched. A layout of the blowing boundary layer control system was designed. The weight and center data of the blowing boundary layer control system were estimated. The influence of the increase of maximum lift coefficient on the distribution of waterlanding load was analyzed. The influence of the waterlanding load variation on the weight and center of aircraft hull and float was evaluated by engineering estimation method. After the installation of the blowing boundary layer control system, the water landing load of a amphibious aircraft is reduced by 26.4%, the weight of the hull and float structure can be reduced by 15.3%, the weight reduction of the hull and float structure is approximately the same as that of adding the blowing boundary layer control system, no loss of aircraft weight and balance performance.
2020 Vol. 63 (20): 86-92 [Abstract] ( 164 ) HTMLNew PDF (2862 KB)  ( 383 )
93 Joint Error Analysis of Airfoil and Airframe and Process Program Selection
YUAN Chunhua
DOI: 10.16080/j.issn1671-833x.2020.20.093
At present the “main manufacturer–supplier” model is used widely for the research of large aircraft project inland: namely the airframe components will be manufactured by different airframe suppliers and assembled by main manufacturer. In project research stage, the joint method is matching the joint butts of airframe and airfoil and fasten by bolts, the methods of matching the components after delivery in final state and finishing the final dimensions after joint are adopted, which decides whether the aircraft batch production could be finished with high quality, high efficiency and low cost, and ensure to realize the design requirements and meet airworthiness requirements.
2020 Vol. 63 (20): 93-103 [Abstract] ( 159 ) HTMLNew PDF (2425 KB)  ( 481 )
104 Research and Application of Finishing Technology for Eccentric Hole of Wing Body of Large Amphibious Aircraft
YANG Xinliang,ZHANG Xuezhen,WEN Duanhua,CHEN Jian
DOI: 10.16080/j.issn1671-833x.2020.20.104
This paper aims at the problem of the attitude adjustment and the high-strength eccentric hole processing during docking of the wing and fuselage, the tail and fuselage of the large amphibious aircraft. Based on the hole drilling technology of automatic feed drilling, a technological test plan for the machining of high-strength eccentric holes for aircraft docking was designed. Then determining the technological parameters of machining high-strength eccentric holes by automatic feed drilling. At the same time, the aircraft wing body attitude is analyzed through the laser tracker to ensure the docking of the wing and fuselage, the tail and fuselage of the large amphibious aircraft and meet the requirements.
2020 Vol. 63 (20): 104-111 [Abstract] ( 154 ) HTMLNew PDF (2724 KB)  ( 298 )
112 Construction and Operation of Civil Aircraft Development Project Management Model
ZHANG Xuezhen, CAO Peng, FAN Qingling, CHANG Shijun, DUAN Maosen
DOI: 10.16080/j.issn1671-833x.2020.20.112
Based on the actual needs of large amphibious aircraft development project management in China, a three-dimensional model of civil aircraft development project management is constructed with five process groups of project management, five stages of civil aircraft development, and nine business areas set under the integrated management mode of R & D and manufacturing. Combined with the three-dimensional model level and management requirements of project management, the responsibility matrix of different organizations in project management is implemented, and how to implement the project management work into the daily operation activities of enterprises is elaborated.
2020 Vol. 63 (20): 112-117 [Abstract] ( 162 ) HTMLNew PDF (2491 KB)  ( 480 )
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