隔膜泵橡胶隔膜的ANSYS有限元分析

在发展重载高压大流量先进隔膜泵过程中,对隔膜泵关键部件橡胶隔膜的大变形能力和使用寿命提出了更高的要求.本文利用有限元分析软件ANSYS对隔膜泵橡胶隔膜进行建模和分析计算,为进一步优化橡胶隔膜的结构设计奠定了基础.     

ANSYS二次开发在隔膜泵曲轴分析中的应用

近年来，市场对高压大流量隔膜泵的需求越来越大，曲轴作为隔膜泵的一个关键零件，也承受着越来越多的结构及质量的考验。本文分析了ANSYS软件二次开发技术在三拐曲轴CAE分析过程中的应用及意义。在实际分析过程中，通过二次开发得到的曲轴CAE分析专用模块，曲轴载荷的自动加载及接触单元的自动生成提高了CAE分析效率及准确性，该模块的开发也大大加快了实现三拐曲轴有限元程序参数化的步伐。     

大型隔膜泵十字头螺母强度分析及结构改进

十字头螺母是大型隔膜泵系统中动力端曲柄连杆机构的关键部件,也是动力端的易损部件之一.在隔膜泵的现场实际运行过程中,因应力集中而引起十字头螺母断裂的情况时有发生.因此,需要对原有十字头螺母的结构进行改进使其降低应力集中以达到延长使用寿命的目的.本文以SGMB300/4C型隔膜泵十字头螺母为例,采用有限元软件ANSYS对其进行静强度校核分析并提出结构修改方案.通过几种不同结构十字头螺母静强度分析结论的对比,从而确定最佳的改进结构.所得结论对十字头螺母及相关产品的设计与研发具有一定的理论指导意义.     

基于有限元的隔膜泵隔膜行程设计

隔膜是隔膜泵的关键件,隔膜行程的控制对隔膜的使用寿命有很大影响,本文采用有限元方法对隔膜行程进行分析,并与实验结果进行比较研究,有限元分析结论与实验结果基本吻合,为隔膜行程的生产设计提供了一种有限元理论分析方法,具有工程应用价值。     

隔膜泵橡胶密封圈的有限元分析及其结构优化研究

利用有限元软件ANSYS,对隔膜泵橡胶密封圈进行有限元建模与计算,得出其工作状态下的变形、应力及最大接触压应力,为隔膜泵橡胶密封圈的优化设计提供参考依据。     

双缸双作用隔膜泵动力端关键件的强度分析与评价

双缸双作用隔膜泵是煤化工领域水煤浆输送的关键设备，双缸双作用隔膜泵动力端主要由主动轴和皮带轮等关键部件所组成，这些关键部件能否满足强度要求不仅是泵设计人员应主要考虑的问题，也是隔膜泵在用户现场安全、稳定运行的关键因素。本文应用大型有限元分析软件ANSYS对动力端关键部件按实际工况进行强度分析并对分析结果进行评价，其结论对隔膜泵动力端相关部件的设计研发具有一定的理论指导意义。     

隔膜室盖联接螺栓预紧力的有限元分析

以隔膜泵液力端隔膜腔与隔膜室盖的联接螺栓为研究对象,通过预紧力单元法模拟螺栓预紧力的加载方法,采用有限元软件ANSYS分析预紧力单独作用与预紧力及外载荷同时作用的情况,并进行隔膜室螺栓的接触分析,得出分析隔膜泵螺栓联接能力、预紧效果及失效原因的理论依据。分析结论对料浆输送主要设备隔膜泵联接螺栓的设计制造、安装调试与维护检修具有参考意义。     

隔膜泵管口载荷的校核

隔膜泵是一种应用于矿山、化工等领域的管道输送设备,其出料管口处受到管路系统所施加的力与力矩的作用,为了隔膜泵不被损坏,需要控制其受力情况,保证强度满足设计要求。通过在SolidWorks中建立三维模型,并进行有限元分析,得到了隔膜泵的变形及应力结果,校验了管口载荷与设备本身的匹配性。     

基于ANSYS的隔膜泵曲轴应力强度因子有限元计算

本文基于大型有限元软件ANSYS,对隔膜泵曲轴进行三维有限元分析,确定裂纹产生的工位;运用AN—SYS软件的子模型法得到了含裂纹曲轴的应力强度因子值。为预测含裂纹曲轴的承载能力、制定判废标准等提供相关的疲劳断裂参数和技术支持。     

阀体的密封结构对小隔膜使用寿命的影响

小隔膜是往复式活塞隔膜泵中关键橡胶件之一,其使用寿命直接关系到隔膜泵的运行状况。简要介绍小隔膜的材质、几何结构和作用之后,将三个小隔膜应用实例通过有限元分析其最大应力和应力最大位置,确定了其中一种实例作为小隔膜密封的首选方案。最后对小隔膜价值做了反向论证。     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。