共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
采用简化的有限元模型,利用ANSYS软件对谐振器进行模态分析,以达到预定的固有频率为追求目标,在ANSYS软件中对谐振器主要参数进行了优化,得出了较为理想的结果,对疲劳试验机的设计具有指导意义。 相似文献
3.
在Solidworks环境下建立了平面定轮闸门的三维实体模型.根据有限元理论.应用COSMOSWorks软件,建立了闸门的有限元模型,对闸门在水压力作用下的整体变形及应力进行了分析研究,有效反映了闸门的空间效应,并与传统方法计算结果进行对比,据此对闸门的安全性进行了分析评估,也为闸门的设计提供了依据. 相似文献
4.
石英钟表具有价格便宜,使用方便等优点,故应用越来越普遍.它是用什么方法来计时的呢?石英钟表的表面一般都标 有“QUARTZ”的字样,意为石英,石英钟的“心脏”便是里面的一小块石英晶体。石英即二氧化硅,它是砂石的主要成分,但是砂石里面还含有许多其他杂质。由纯净的二氧化硅分子,通过规则的排列,构成一大块晶体,这就是石英晶体。当石英受到压力发生形变时,在它的两就能产生出电压来,这叫做压电效应。利用石英体所具有的压电效应,可以把机械振动信号转换成交变的电信号。人们又知道,石英晶体的振动频率取决于晶体的形… 相似文献
5.
6.
石英钟表是以石英晶体谐振作振源的钟表.在其表盘上标有“QVARTZ”,意为石英.其故障现象主要包括停走;走走停停;停走但有咯咯声音.下面分类就其故障分析其产生的原因和排除的办法.因石英钟内部电路大同小异,就以指针式石英表结构来进行说明.1 停走1.1 电源电压低于1.3V.解决方法是更换新电池. 相似文献
7.
磁力泵磁力驱动系统仿真 总被引:1,自引:0,他引:1
在研究圆筒式径向磁力驱动器结构特点、设计流程、设计方法的基础上,以SolidWorks为软件支撑平台,利用Visual Basic语言对SolidWorks提供的API函数进行二次开发,所形成的仿真系统包括3部分,分别为参数化设计、参数化建模和参数化有限元分析,可以快速地实现磁力驱动器各部分零件的自动建模和装配.同时,基于ANSYS有限元软件,对圆筒式径向磁力驱动器的磁场建立二维模型,对其磁场进行数值求解计算,分析磁力线分布,磁感应强度分布和磁力矩大小.最后,针对有限元软件在磁力驱动器设计中的应用要求,基于ANSYS平台开发了参数化的磁力驱动器有限元分析系统,该系统方便了磁力驱动器在一定结构不同参数下快速更新模型和进行有限元仿真分析,为磁力驱动器的研究提供了高质量低成本的设计分析方法. 相似文献
8.
在Solidworks环境下建立了平面定轮闸门的三维实体模型。根据有限元理论,应用COSMOSWorks软件,建立了闸门的有限元模型,对闸门在水压力作用下的整体变形及应力进行了分析研究,有效反映了闸门的空间效应,并与传统方法计算结果进行对比,据此对闸门的安全性进行了分析评估,也为闸门的设计提供了依据。 相似文献
9.
10.
起重机吊臂结构的有限元分析 总被引:1,自引:1,他引:0
以ANSYS有限元分析软件为工具,详细论述了汽车起重机吊臂结构的有限元分析处理过程,并对吊臂在建模时的简化处理方法,关键载荷的施加都进行了阐述,对吊臂的设计工作具有一定的指导意义和参考价值. 相似文献
11.
12.
13.
14.
15.
《Journal of Agricultural Engineering Research》1998,69(3):249-254
A model to represent the discolouration of dried powder of carrots as a function of temperature was developed. Two types of carrots, Asian and European, containing large amount of lycopene and β-carotene, respectively, were tested. The dried powder was stored under an atmosphere with O2and at three different temperatures, 5,20 and 35°C. The surface colour of the powder was monitored during storage by a Hunter colour ratioa/b. In the proposed model, the rate of oxidation was assumed to be represented by the product of the fraction of concentration of oxidized pigment at arbitrary time and a specific rate of oxidation of pigment. The rate parameters in the proposed model were calculated by fitting the experimental data with smooth curves by trial and error at the end of the induction period but before discolouration took place. The frequency constant and activation energy, expressing the temperature dependence of the rate parameters, were expressed by the Arrhenius relation. The simulation results of a Hunter colour ratioa/bof dried powder at 25°C showed good agreement with the experimental data, suggesting that the proposed model was effective for the prediction of discolouration of dried powder of both types of carrot. The use of the induction period in the manner described may enable the shelf life of dried powder to be predicted. 相似文献
16.
17.
感官检验棉花的品级,这是农村常见的一种检测手段.它的一个主要特点就是存在不确定性.这是由于检验员的品级检验水平存在一定的差异,其中有很多因素制约着检验的结果.文章对影响感官检验结果的因素进行了系统的分析. 相似文献
18.
19.
The fractional outflow rate of water from the rumen, measured as the rate of disappearance of the chromium complex of ethylenediamine tetra-acetic acid, was related to a number of dietary factors. A multiple regression equation was derived which expressed fractional outflow rate as a function of the intakes of dry matter, ash, acid-detergent fibre and crude protein.The data analysed consisted of 243 observations for sheep on 59 diets, including forage, concentrate and mixed diets. The ranges covered by the data were: fractional outflow rate 0.7–3.6 day?1; dry matter intake 560–1400g/day; ash 4–30%, acid-detergent fibre 7–41%, crude protein 5–26 % of dry matter; there were no observations for sheep of less than 34 kg liveweight.The equation accounted for 56·3 % of the total variance. Between-sheep variance could not be calculated for the whole of the data but was undoubtedly substantial since, for a sixth of the data, it was known to account for 38 % of the total variance. 相似文献
20.
从灾害经济学的角度探讨了城镇供水优化调度的必要性和可能性,认为在缺水不可避免的情况下,对供水进行优化调度可以减小缺水带来的损失,产生较好的减灾效益,特别是可以大大减小严重干旱的灾害效应。并根据水资源的特性,提出了缺水损失的计算模式以及优化调度的原则和方法。 相似文献