共查询到20条相似文献,搜索用时 46 毫秒
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随着时代发展,适应大学生特点的教学改革在不断进行,要求教师培养学生的学习能力而不是单纯的传授知识.针对本科生工程流体力学课程的教学模式进行改革,将计算流体力学引入到工程流体力学课堂.5年的教学实践,证明其对学生们的工程流体力学课程和后续专业课的学习有很大帮助.文中以实例的形式介绍了将计算流体力学与本科生流体力学课程结合的方法与实践,深入探讨了教学改革.该实践是提高教学质量的有价值的尝试. 相似文献
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随着时代发展,适应大学生特点的教学改革在不断进行,要求教师培养学生的学习能力而不是单纯的传授知识.针对本科生工程流体力学课程的教学模式进行改革,将计算流体力学引入到工程流体力学课堂.5年的教学实践,证明其对学生们的工程流体力学课程和后续专业课的学习有很大帮助.文中以实例的形式介绍了将计算流体力学与本科生流体力学课程结合的方法与实践,深入探讨了教学改革.该实践是提高教学质量的有价值的尝试. 相似文献
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工程流体力学作为一门本科专业基础课程,它基础性强,应用性很广,概念多且抽象不易理解,偏微分方程多,要使学生能够很好理解、掌握其中的知识对教学手段有较高的要求. 随着数学的发展,计算机的不断进步,目前各种商业CFD (computational fluid dynamics)通用性软件包性能日趋完善,应用范围不断扩大,已为工业界广泛接受和应用. 针对本科《工程流体力学》课程缺少计算流体力学(CFD)数值模拟部分的内容,本文提出了将CFD 理念引入本科工程流体力学课堂的意义、目的和实施方法,以便能促进学生对《工程流体力学》课程内容的理解掌握和应用能力的加强,培养学生对现代工业的设计和研究工作的适应力和创造力. 相似文献
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简要评介国外1995-2006年间出版的英语教材17种,以及习题指
导书3种. 简述这些教材的内容,分析这些教材在取材和处理方面的特点,对这些教材的分
析表明,振动课程的核心内容是确定性线性离散系统和一维连续系统的自由和受迫振动,所
采用的方法以解析为主,数值和实验为辅. 不同教材对于扩展性内容有各自的选择,包括随
机振动、非线性振动、振动控制、信号处理、实验模态分析、转子动力学等. 相似文献
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Numerical simulation on micromixer based on synthetic jet 总被引:1,自引:0,他引:1
This paper studied a concept of micromixer with a synthetic jet placed at the bottom of a rectangular channel. Due to periodic ejections from and suctions into the channel, the fluids are mixed effectively. To study the effects of the inlet velocity, the jet intensity and frequency, and the jet location on the mixing efficiency, 3-D numerical simulations of the micromixer have been carried out. It has been found that when the jet intensity and the frequency are fixed, the mixing efficiency increases when Re 〈 50, and decreases when Re 〉 50 with the best mixing efficiency achieved at Re = 50. When the ratio of the jet velocity magnitude to the inlet velocity is taken as 10 and the jet frequency is 100 Hz, the mixing index reaches the highest value. It has also been found that to get better mixing efficiency, the orifice of the synthetic jet should be asymmetrically located away from the channel's centerline. 相似文献
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实现动基座上动调陀螺仪启停锁定 总被引:1,自引:0,他引:1
本文在对动基座上DTG启停运动进行分析的基础上,介绍了实现动基座锁定的思想与方法,并具体实现了由单片机完成的动基座上动调陀螺仪的启停锁定。 相似文献
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本认为「1」中的参数迭代法实际上就是一种加权殖量法,而不是一种新的方法,通过选取不同的配置点,可得到精度更高的近似解。 相似文献
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冰压力是高纬度地区结构的重要荷载,然而传统的基于电阻应变计开发的冰压力传感装置在稳定性与耐久性上遇到难以跨越的难题。光纤光栅是目前在智能材料系统与结构健康监测研究与应用最为广泛的敏感材料之一,具有分布式绝对测量、抗腐蚀能力强等优点。本文基于双光纤光栅应变测量原理,考虑冰压力测试装置的环境条件,设计开发出冰压力传感装置,详细推导和试验验证了该装置的传感特性,并将试验与理论结果进行了对比。研究结果表明该装置具有温度自补偿、测量值与荷载作用点无关、线性度和重复性好、精度较高等优点,具有良好的应用前景。 相似文献
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This paper is based on portions of a keynote presentation, which explored the boundaries of what is understood about the vibration behavior of long cylinders excited by vortex shedding. The source of data is a recent field experiment on a long flexible cylinder, densely instrumented with fiber optic strain gauges. The paper emphasis is on previously unknown or unexplained phenomena and in some cases offers provocative insights as opposed to conclusive proofs. Three particular topics are covered: (i) the occurrence of peak strain and fatigue damage rates at unexpected locations, (ii) the dominance of traveling wave rather than standing wave response, and (iii) the appearance of stable cylinder trajectories, such as figure eights and crescents in pure traveling wave regions. Potential explanations are offered and areas for promising additional research are proposed. 相似文献
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This paper studied how wind pressures and forces affect rigid sectional models of a complicated group-tower using experimental wind tunnel tests. The group-tower was composed of five separate sub-towers with different diameters and heights. The basic characteristics of the mean and fluctuating wind pressure distributions on typical parts of the sub-towers were analyzed along the heights of each sub-tower, and their distribution trends are discussed. Also, the mean base shear and moment coefficients and their characteristics are presented. The wind pressure and wind force results showed that because the group-tower structure consisted of five separate lofty towers, the mutual aerodynamic interferences were serious; thus, the mean and fluctuating wind pressure, wind force distributions and the mean base shear and moment coefficients were quite complicated. 相似文献