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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Effect of direct supervision of a strength coach on measures of muscular strength and power in young rugby league players [PDF]
, 2004 The purpose of the present study was to examine the influence of direct supervision on muscular strength, power, and running speed during 12 weeks of resistance training in young rugby league players. Two matched groups of young (16.7 ± 1.1 years [mean ±
Dascombe, Ben (R21089) +5 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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, 2021 The aim of this present study was to compare the reactive strength index (RSI) characteristics and trial to trial reliability of U17, U19 and Senior female international soccer players. Fifty – seven elite female soccer player participated in the study, (
Doyle, Brian, Horan, Dan, Browne, Declan
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Remuneration Guidelines for Strength and Conditioning Coaches within Universities in the United Kingdom: International Universities Strength and Conditioning Association (IUSCA) Position Statement [PDF]
, 2021 The remuneration of strength and conditioning coaches corresponding to the professional services provided across the high school, collegiate and professional sector,1 has received increased attention in recent times.
Bird, Stephen P. +2 more
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Hierarchical fiber bundle strength statistics [PDF]
, 2012 Multi-scale modeling is currently one of the most active research topics in a wide range of disciplines. In this thesis we develop innovative hierarchical multi-scale models to analyze the probabilistic strength of fiber bundle structures.
Alsaeed Mahmoud Abdalrahman, Tamer
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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.
Wisitsorasak, Apiwat, Wolynes, Peter G.
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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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