Results 1 to 10 of about 7,465,089 (357)
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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Benchmark of many-body approaches for magnetic dipole transition strength [PDF]
Phys. Rev. C110, 014307 (2024), 2023 The low-energy enhancement observed recently in the deexcitation gamma-ray strength functions, suggested to arise due to the magnetic dipole radiation, motivates theoretical efforts to improve the description of M1 strength in available nuclear structure models.
arxiv +1 more source
On the “Strength” of Behavior [PDF]
Perspectives on Behavior Science, 2020 AbstractThe place of the concept of response strength in a natural science of behavior has been the subject of much debate. This article reconsiders the concept of response strength for reasons linked to the foundations of a natural science of behavior. The notion of response strength is implicit in many radical behaviorists’ work.
Simon, Carsta +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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On the strength of glasses [PDF]
Proceedings of the National Academy of Sciences, 2012 The remarkable strength of glasses is examined using the random first order transition theory of the glass transition. The theory predicts that strength depends on elastic modulus but also on the configurational energy frozen in when the glass is prepared.
Apiwat Wisitsorasak, Peter G. Wolynes
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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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Multidisciplinary Optimization Design of Low-Noise Propellers
Aerospace, 2023 In this paper, a multidisciplinary optimization design method and its verification of low-noise aircraft propellers considering aerodynamics, noise, and structural strength were carried out to further reduce the aerodynamic noise of the aircraft ...
Dongwen Xue +3 more
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Numerical and experimental study for AM50 magnesium alloy under dynamic loads [PDF]
MATEC Web of Conferences, 2021 Magnesium alloys are widely used in automotive (steering wheel frames) and aerospace due to their lightweight, ductility, energy absorption and castability properties.
Ailinei Iulian-Ionuț +3 more
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