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Numerical simulation of acoustic pressure field for ultrasonic grain refinement of AZ80 magnesium alloy SHAO Zhi-wen, LE Qi-chi, ZHANG Zhi-qiang, CUI Jian-zhong Key Laboratory of Electromagnetic... was applied. To gain insight into the mechanism of ultrasonic treatment which affected the microstructure of the alloy, numerical simulations were carried out and the effects of different ultrasonic......
Ultrasonic Pulse Signal Resonance Features in Layered CFRP Within Voids杨辰龙1,陈越超1,2,WANG Zhe1,ZHENG Huifeng31. The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University2...="ChDivSummary">The ultrasonic pulse signal resonance features in layered carbon fiber reinforced plastic(CFRP) within voids were researched. The frequency domain model of acoustic wave propagation......
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Trans. Nonferrous Met. Soc. China 24(2014) 76-81 Effects of ultrasonic treatment on microstructures of AZ91 alloy Yue-shuang YANG1, Jin-cheng WANG1, Tao WANG1, Cheng-ming LIU1, Zhong-ming ZHANG2 1...’an 710048, China Received 23 October 2012; accepted 15 March 2013 Abstract: Effects of ultrasonic treatment on microstructures were investigated by introducing the ultrasonic oscillation into AZ91 alloy......
Trans. Nonferrous Met. Soc. China 22(2012) s793-s800 Rotary ultrasonic-assisted milling of brittle materials KUO Kei-lin1, TSAO Chung-chen2 1. Department of Vehicle Engineering, National Taipei... to improve the machining efficiency of ultrasonic milling, the easiest and most effective approach was started with the improvement of tool design. The main objective of this research was to utilize rotary......
Effects of Ultrasonic Treatment on Microstructure and Mechanical Properties of Semisolid Sn-52Bi Alloy胡永俊,郑辉庭School of Material and Energy, Guangdong University of Technology摘 要:The effects of ultrasonic vibration temperature on the microstructure of semisolid Sn-52 Bi alloy and mechanical properties were investigated. The results show......
Effect of ultrasonic power introduced by a mold copper plate on the solidification processXiao-fang Shi,Li-zhong Chang,Jian-jun WangSchool of Metallurgy Engineering,Anhui University of Technology摘 要:An electroslag furnace with ultrasonic vibration introduced by a mold copper plate was designed. The effects of ultrasonic power on the element distribution......
Contact Analysis and Modeling of Standing Wave Linear Ultrasonic Motor时运来State Key Laboratory of Mechanics and Control of Mechanical Structure,Nanjing University of Aeronautics & AstronauticsDigital... mechanics between the stator and slider of the standing wave linear ultrasonic motor was presented. The proposed model starts from the assumption that the vibration characteristics of the stator......
局部线性结构作为RBF网络输出层的权值.该模型随系统工作点的变化而变化,固定工作点时为局部线性ARX模型,当工作点变化时为全局非线性ARX模型.根据该模型的结构特点,采用结构化非线性参数优化方法(structured nonlinear parameter optimization method, SNPOM)来辨识模型的结构及线性,非线性参数.然后,以辨识的模型为基础,根据模型的局部线性及全局非线性特征设计预测控制器.仿真结果表明:以该建模方法建立的模型能很好地局部和全局描述磁悬浮球系统的动态特性,并能实现小球的稳定悬浮控制,比以一般ARX模型,RBF-ARX模型为基础的控制效果更好. 关键词:非线性ARX模型(NARX);线性函数权重RBF-ARX模型(LFWRBF-ARX);SNPOM(structured nonlinear parameter optimization......
Effects of Ultrasonic Field on Microstructures and Properties of Semi-solid AZ91D Magnesium Alloy陈国平Mechanical Engineering Institute, Hunan Industry University(Zhuzhou)Mechanical and Electrical Engineering Institute, Nanchang University摘 要:The microstructure distribution rule of semi-solid AZ91D alloy treated by ultrasonic was researched, and mechanical......