共查询到20条相似文献，搜索用时 531 毫秒
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为了研究车身造型对气动阻力的影响,运用SolidWorks建立了汽车模型,并对汽车模型进行了简化设计.基于ANSYS软件中的mesh模块对建立好的汽车模型进行网格划分,运用Fluent对汽车车身气动造型进行数值仿真,分析了车身外流场.通过参数化建模对车身造型进行了优化设计.结果表明:在汽车底盘高度为75 mm,车头圆角在95°时,车身受到的阻力和升力均为最小值.计算结果为车身造型设计提供了理论依据. 相似文献
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本文从教学设置、教学态度、教学能力、教学结果等因素,设计了评价高等数学教学质量的调查问卷,抽取了苏州科技学院2009级13个专业高等数学教学评价相关原始数据,运用Matlab软件,利用主成分分析建立高等数学教学质量评价模型.并运用数据对高等数学教学质量进行实证检验,结果表明该模型稳定性较好,对开展有效的高等数学质量评价有一定的指导意义. 相似文献
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基于功能要求确定以蜗杆凸轮组合机构作为汽车座椅上下调节机构的运动方案,基于机构学理论建立该组合机构设计数学模型并在Matlab软件中编程求解,在CATIA软件中建立该组合机构各零件参数化模型并进行虚拟装配,利用基于装配体的有限元分析技术在ANASYS软件中对该组合机构总成数字化模型进行了强刚度分析和评价.最后,给出了一个设计实例. 相似文献
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黄彦奕 《泉州师范学院学报》2015,(2):57-61
采用有限元软件ProCAST模拟GH4169合金金属液的凝固重熔过程,分析不同界面传热系数下的温度场变化,预测铸态组织的二次枝晶间距,并进行了相关实验验证.实验结果表明:对GH4169合金凝固重熔过程的模拟得到了与实验相符的结果,验证了该模拟方法和模型建立的可行性. 相似文献
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根据某车室壁板结构有限元模型,建立了车室声腔有限元模型.基于声学模态分析理论,利用SYSNOISE软件对该声学有限元模型进行自由模态分析,获得了车室声腔的各阶固有频率和模态振型,并将声学模态分析结果与汽车的各种激励源频率特性进行分析比较,其结论可用来改进车身系统的声学设计. 相似文献
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《洛阳师范学院学报》2017,(5):64-68
针对我国房地产价格影响因素,首先从经济因素的角度出发,选取相关数据;其次,运用EVIEWS软件对房地产价格的经济影响因素进行分析、检验,最终建立合适的回归模型;最后对所求解的结果进行分析,并根据结果提出相关的政策建议. 相似文献
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运用傅立叶方程建立了氟化体系稀土电解槽的温度场的有限元模型,采用VC6.0编程制作了相应的软件,并对导热系数、密度、比热等相关参数进行了运行计算研究.结果表明,建立的数学模型和编制的软件对稳态温度场的数学模拟计算结果与实际测试的结果基本吻合.可为新一代稀土电解槽体的开发设计提供参考. 相似文献
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基于线弹性力学理论,建立门式起重机力学模型;采用有限单元法对该模型进行数值求解,并提出以20节点空间单元作为网格划分的基本单元.运用CATIA软件进行其三维建模,在ANSYS Workbench软件中,对该三维立体模型进行数值模拟,分析了载荷因素对起重机桥架结构的影响.结果显示,设计的门式起重机结构参数满足强度和刚度要求. 相似文献
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INTRODUCTIONElectro rheological (ER ) Magneto rheologi cal(MR)fluidisakindofcontrollablefluidwhoserheologicalproperties,especiallyapparentviscosity,canbedramaticallyandreversiblyvariedinafewmillisecondsbytheapplicationofanexternalelectrical magneticfield… 相似文献
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Zhu Chang-sheng 《浙江大学学报(A卷英文版)》2003,4(5):514-519
A disc-type magneto-rheological fluid damper operating in shear mode is proposed in this paper, which is based on the special
characteristics of the magneto-rheological (MR) fluid with rapid, reversible and dramatic change in its rheological properties
by the application of an external magnetic field. The magnetic field of the disc-type MR fluid damper is analysed by the finite
element method; the controllability of the disc-type MR fluid damper on the dynamic behaviour of a rotor system; and the effectiveness
of the disc-type MR fluid damper in controlling the vibration of a rotor system, are studied in a flexible rotor system with
an overhung disc. it is shown that the magnetic flux density of the disc-type MR fluid damper in the working areas can significantly
change with the applied current in the coil; and that the dynamic behavior of the disc-type MR fluid damper can be varied
by the application of an external magnetic field produced by a low voltage electromagnetic coil. The disc-type MR fluid damper
can significantly change the dynamic characteristics of a rotor system, provided that the location of the disk-type MR fluid
damper is carefully chosen. The disc-type MR fluid damper is a new actuator with good dynamic characteristics for rotating
machinery.
Project supported partially by the EC BRITE/EURAM program under BRPR-CT97-0544 IMPACT project and State Key Laboratory of
Vibration, Shock and Noise, Shanghai Jiatong University 相似文献
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祝长生 《浙江大学学报(A卷英文版)》2003,4(5)
A disc-type magneto-rheological fluid damper operating in shear mode is proposed in this paper, which is based on the special characteristics of the magneto-rheological (MR) fluid with rapid, reversible and dramatic change in its rheological properties by the application of an external magnetic field. The magnetic field of the disc-type MR fluid damper is analysed by the finite element method; the controllability of the disc-type MR fluid damper on the dynamic behaviour of a rotor system; and the effectiveness of the disc-type MR fluid damper in controlling the vibration of a rotor system, are studied in a flexible rotor system with an over-hung disc. It is shown that the magnetic flux density of the disc-type MR fluid damper in the working areas can significantly change with the applied current in the coil; and that the dynamic behavior of the disc-type MR fluid damper can be varied by the application of an external magnetic field produced by a low voltage electromagnetic coil. The disc-type MR fluid damper can significantly change the dynamic characteristics of a rotor system, provided that the location of the disk-type MR fluid damper is carefully chosen. The disc-type MR fluid damper is a new actuator with good dynamic characteristics for rotating machinery. 相似文献
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根据液压传动课程的教学内容和特点,通过实例说明流体动力学软件Fluent在教学中的应用,直观展示了流体在元件内部的流动情况,速度、压力的定量分布规律,依此分析结构对流动特性及元件性能的影响。仿真教学有助于学生掌握抽象的流体力学理论,加深对元件工作原理的理解及仿真设计方法的使用,拓展了现有的教学方式,加强了教学与工程应用之间的有机结合。 相似文献
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北京市传统大学生宿舍室内空气环境的模拟 总被引：2，自引：0，他引：2
本文旨在通过流场分布来研究北京市传统学生宿舍里的室内空气环境(包括室内压力场与速度场的分布情况)。文中采用k-ε双方程湍流模型来模拟空气介质，应用计算流体力学(CFD)的方法来求解室内空气流动，运用有限体积法来处理控制方程，并用Fluent模拟流场分布结果。分析结果表明，学生床上的通风情况跟床的位置有很大的关系。 相似文献
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Experimental Study on Magnetorheological Damper for Semi-Active Vibration Control of Civil Infrastructures 总被引：3，自引：0，他引：3
Magnetorheological (MR) fluid is a kind of smart material whose rheological properties can be rapidly varied in magnetic field. To make full use of the advantages of MR fluid to devices, a model of double-ended,shear-combined and valve-typed MR damper is designed and manufactured, and the dynamic properties under sinusoidal excitations are experimentally studied. The experiment results show that the maximum damping force of the MR damper at the full magnetic intensity reaches about 20 k while the maximum power required is less than 50W, which predicts that the MR damper will be a powerful measurement for semi-active vibration control of civil infrastructures. 相似文献
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Fluent是流体力学中通用性较强的商业CFD软件。将Fluent软件引入流体力学多媒体教学中,可对定常不可压缩流体在圆管内流动进行数值模拟,分析流体层流、紊流的两种流动状态,验证管内流体速度及切应力分布。实践表明,在流体力学课堂上配以Fluent数值模拟,有助于学生消化较难理解的理论知识,增强学习兴趣,提高教学效果。 相似文献
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This paper emphases on analyzing and investigating the mechanical behavior of electro-rheological fluid (ERF) semi-active damper. Theoretical model was developed to describe the relationship between electric field and the resistance force of ERF flowing through two parallel plane electrodes. In the model, the pressure drop along electrodes was supposed to consist of two parts: one related with viscosity and the other related with dynamic yield shear stress. The concept of yield stress influence factor was developed in 相似文献
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用于被动力/力矩再现的新型磁流变液阻尼器 总被引：1，自引：0，他引：1
研制了一种用于被动力/力矩再现的新型磁流变液阻尼器,该阻尼器能够在磁场的作用下产生连续变化的阻尼力/力矩.阻尼器的结构包括一个上盖和一个下盖,一个转子设置于上盖和下盖之间,转子与上下盖之间的间隙充满磁流变液,在磁场作用下其粘度变大时,转子相对于壳体将受阻尼力作用.阻尼力矩的模型主要由以下几部分组成:一是由磁场作用于磁流变液产生的力矩,二是由磁流变液的动力粘度产生的力矩,最后是由装置的摩擦产生的力矩.由动力粘度产生的力矩可以通过简单的方法进行计算,由摩擦产生的力矩可以通过实验测得,而由磁场产生的力矩则要通过电磁场的有限元分析得到.最后,对研制的阻尼器原型进行了性能实验,检验了设计方法的有效性. 相似文献