Results 1 to 10 of about 242,288 (92)
The vibration environment prediction method based on OPAX
Xibei Gongye Daxue Xuebao, 2022 准确获得飞机结构及机载设备的振动环境至关重要, 传统的振动环境预计方法预计准确度低, 可能会导致后期振动环境试验过试验或欠试验的问题。创新性地提出了一种基于扩展工况传递路径分析(OPAX)的振动环境预计方法, 采用实测数据搭建振动环境预计模型, 再利用该模型对新工况下的振动环境进行预计。试验室环境下, 搭建了某型飞机典型设备舱振动测试系统, 基于OPAX方法搭建了机载设备的振动环境预计模型, 并对其预计准确度进行了验证。对比预计结果与试验结果, 得到: ①新工况下模型预计均方根值与试验测试均方根值相比,
LI Yixuan +3 more
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A review of the research on the VHCF test technology for aero-engine typical materials
Hangkong gongcheng jinzhan, 2023 As the most critical and core part of the aircraft, the aero-engine has been serving in extreme environ-ment such as high temperature and high load for a long time. Fatigue failure is one of the main causes of engine structure failure.
WANG Zhaohan +5 more
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Autowave Criteria of Fracture and Plastic Strain Localization of Zirconium Alloys
Metals, 2022 Plastic deformation and fracture of Zr–1% Nb alloys exposed to quasi-static tensile testing have been studied via a joint analysis of stress-strain curves, ultrasound velocity and double-exposure speckle photographs.
Lev B. Zuev +2 more
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Effects of opening size and layering ratio on compression properties of composite laminates
Journal of Aeronautical Materials, 2022 In order to study the effect of opening size and layering ratio on the compression performance, the compression experiments of composite laminates with three opening sizes and ply were carried out.
YANG Junchao, DENG Fanchen, CHAI Yanan
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Test Research on Fuselage Panel Subjected to Internal Pressure Load
Hangkong gongcheng jinzhan, 2018 Internal pressure is a severe cyclic load for fuselage structure, and it is important to investigate the fatigue and damage tolerance characters of fuselage panel under internal pressure.
Zang Weifeng, Chen An, Dong Dengke
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Study on optimization method of the modular reconfigurable UAV's wing structure
Hangkong gongcheng jinzhan, 2023 The design of the modular reconfigurable unmanned aircraft vehicle (UAV) has complex conditions and multiple constraints, and it is necessary to obtain the optimal scheme by means of the research on suitable optimiza-tion method according to different ...
LUO Lilong, GUO Wenjie, CHANG Liang
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An Image Case of Lepromatous Leprosy in a Patient With Parkinson Disease
Annals of Internal Medicine: Clinical CasesA 72-year-old man with Parkinson disease presented with 18 months of diffuse blotchiness without associated pain or pruritis. Fite stain and Mycobacterium leprae polymerase chain reaction of a skin biopsy specimen were positive, and he was diagnosed with
Rachel E. Strength, Shirin Mazumder
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Hangkong gongcheng jinzhan, 2018 It is of important significance to study the vibration characteristics and vibration suppression technology of aero-engine rotating blades to improve the engine performance, structural integrity and working reliability.
Qin Jie, Yan Qun, Huang Wenchao
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Heat flux calculation method of modular quartz lamp based on ray tracing method
Xibei Gongye Daxue XuebaoIn order to solve the problem that the heat flow calculation time is so long of modular quartz lamp with reflective screen, a ray tracing method is proposed to calculate the radiant heat flow of modular quartz lamp.
LI Xinxin +4 more
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Computational analysis of deformation and fracture in composite materials and coatings [PDF]
EPJ Web of Conferences, 2019 Deformation and fracture of metal-ceramic composites and coatings under quasistatic tension, compression, shear, and during cooling from the melt to room temperatures are numerically investigated.
Balokhonov Ruslan +8 more
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