LHZC6/60振动流化床干燥机模态分析

利用有限元分析软件ANSYS对LHZC6/60型振动流化床干燥机进行模态分析,得出了前十阶固有频率及振型的彩色振型图;可直观地分析振动流化床干燥机的动态特性和薄弱环节,为该机的结构设计和作进一步的动态分析提供了理论依据。     

基于ANSYS的自行车架性能分析

文章用ANSYS软件对自行车架进行了静力学分析和模态分析,建立了自行车架性能分析模型.通过静力学分析,建立了自行车架的力学性能模型,得出了车架总变形、定向变形、等效应力以及等效弹性应变分布情况.通过模态分析,得出了自行车架模型的模态分布情况以及每一模态下的模态振型.最后,综合得出了车架的易变形位置,并提出了相应的防治措施,为高性能车架的设计提供改良依据.     

棒材轧机主传动轴振动故障分析与处理

轧钢车间轧机的运转一般都是由主电机带动减速箱,通过主传动轴与轧辊联接,带动轧辊旋转来实现的。轧机主传动轴的类型比较多,常用的有梅花接轴、十字滑块式接轴、十字轴式万向接轴等。现以我车间棒材轧机φ300精轧机水平机架十字轴式万向接轴为例,简要介绍其振动故障分析及处理方法。     

圆锯片的模态分析

锯片是切断加工的刀具 ,由于锯片是一个面积较大的薄板 ,其厚度与直径的比非常小 ,且又是在高速旋转及高速送进的条件下工作 ,在锯切加工过程中 ,普遍存在着严重的振动问题。通过试验测试和有限元计算对金属冷、热切圆锯片进行了模态分析 ,为进一步研究锯片的振动和稳定性问题打下了基础。     

高炉减压阀组有限元模态分析

为了掌握高炉减压阀组的振动特性,提高减压阀组抗振性,以某厂的高炉减压阀组为研究对象,利用SolidEdge软件建立三维模型,ANSYS - Workbench软件建立有限元模型,通过有限元计算,对其进行模态分析,得到减压阀组前六阶固有频率和振型,并提出改进措施,为减压阀组结构改进提供了理论依据.     

基于系统CAE技术的结晶器液压振动装置仿真分析

针对某钢铁设计院设计的结晶器液压振动装置,采用系统CAE技术对整体设备进行仿真分析,建立了该振动装置整体CAE模型。通过静力分析得出了整体位移及应力分布情况,采用模态分析得到了其低阶固有频率及其振型,满足了工程设计的分析要求。     

管路刚度对精轧机液压回油管振动影响的研究

分析了某钢厂5000mm精轧机立辊液压回油管振动问题,考虑使用改变管路的刚度来解决振动问题,并使用ANSYS CFX软件对这段液压回油管路的一截进行了分析,进行了现场测试,通过仿真和测试共同验证改变管路刚度可以有效地减少回油管振动。     

25kJ液压模锻锤工作状况下试验模态分析研究

采用基于ODS的测试方法对25kj液压模锻锤机身系统进行试验模态分析，采用Vib’SYS振动信号采集、处理和分析软件，由试验数据识别出机身系统的模态参数及其振型图，找出了机身系统的薄弱环节及需要注意和改进的地方。     

精密诊断技术在水泵电机故障分析中的应用

针对锅炉给水泵电机出现的振动和声音异常故障,结合现场实际,应用精密诊断技术分析了故障产生原因,为设备检修提供了决策依据。通过及时检修,排除了由于底座不平使轴承座变形造成的故障,避免了设备事故的发生,保证了生产的稳定顺行。     

高炉TRT煤气管道振动模态分析

针对某公司高炉TRT煤气管道系统在工况切换时管道振动大的问题,应用有限元与试验模态分析相结合的方法,对煤气管道进行模态分析,求得其模态数值和振型,为开展煤气管道系统减振降噪工作提供了可靠依据.     

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。     

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。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.