共搜索到2291条信息,每页显示10条信息,共230页。用时:0小时0分0秒359毫秒
J. Cent. South Univ. (2017) 24: 1465-1475 DOI: 10.1007/s11771-017-3550-5 Effect of ambient wind on pressure wave generated by high-speed train entering a tunnel ZHOU Xi-sai(周细赛)1, 2, LIU Tang-hong(刘...-dimensional, unsteady N-S equations and k-ε turbulence model, the effect of ambient wind on the pressure wave generated by a high-speed train entering a tunnel was studied via numerical simulation......
Transient Response Model of Standing Wave Piezoelectric Linear Ultrasonic Motor时运来,陈超State Key Laboratory of Mechanics and Control of Mechanical Structure, Nanjing University of Aeronautics & Astronautics摘 要:A transient response model for describing the starting and stopping characteristics of the standing wave piezoelectric linear ultrasonic motor......
基于概率损伤算法的复合材料板空气耦合Lamb波扫描成像刘增华,樊军伟,何存富,吴斌北京工业大学机械工程及应用电子技术学院摘 要:采用非接触空耦传感器在准各向同性复合材料板中激励出单一的Lamb波模态,用于分层缺陷的扫描检测.扫描时,激励和接收传感器置于复合材料板同侧并相对倾斜布置,传感器沿2个正交方向同步线性...器;复合材料板;Lamb波;连续小波变换;概率损伤算法;......
; Capillary wave formation on excited solder jet and fabrication of lead-free solder ball ZHANG Shu-guang(张曙光), HE Li-jun(何礼君), ZHU Xue-xin(朱学新...) Abstract: A survey of solder ball production processes especially focusing on disturbed molten metal jet breakup process was made. Then the formation of capillary wave on tin melt jet in the way......
J. Cent. South Univ. Technol. (2008) 15(s1): 467-470 DOI: 10.1007/s11771-008-401-4 Experimental research on characteristic of start-up pressure wave propagation in gelled crude oil by large-scale... to research start-up pressure wave propagation mechanism and determine pressure wave speed in gelled crude oil pipelines accurately, experiment of Large-scale flow loop was carried out. In the experiment......
......
NX WAVE技术在飞行器模型建模中的应用张春燕1,车晨寅1,马其华21. 上海工程技术大学机械工程学院2. 上海工程技术大学汽车工程学院摘 要:通过对NX WAVE技术的研究,以飞行器为例进行全参数,相关性设计.介绍了NX系统中自顶向下的建模方法,并探讨复杂模型建模过程中对于几何体参数控制的方法,使得相对复杂的装配体得到有效的尺寸控制,可以解决复杂设计中尺寸难以修改的难题,避免了重复设计,缩短了更改设计时间,并使得并行工程优势得到充分的发挥,提高了设计效率.关键词:NX WAVE;飞行器模型;并行设计;结构控制;......
J. Cent. South Univ. (2020) 27: 963-972 DOI: https://doi.org/10.1007/s11771-020-4344-8 Dynamic response and failure of rock in initial gradient stress field under stress wave loading WENG Lei(翁磊)1... stress wave in rock mass under gradient stress field was theoretically derived. By using an implicit to explicit solution method in LS-DYNA code, the dynamic mechanical behaviors of rock in gradient......
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......
J. Cent. South Univ. (2020) 27: 3188-3201 DOI: https://doi.org/10.1007/s11771-020-4472-1 Reflection of thermo-elastic wave in semiconductor nanostructures nonlocal porous medium HASHMAT Ali1, ADNAN... longitudinal waves and an independent shear vertical wave exist in the medium which is dispersive in nature. It is seen that longitudinal waves are damped, and shear wave is un-damped when angular......