毕业设计(外文翻译)毕业设计(外文翻译)英文题目DevelopmentofaDeflectionControlledMultlaxlalFatigueTestingMaching中文题目偏心控制的多轴...PDF外文:PDF外文:本科毕业设计本科毕业设计(论文论文)题目:谐振式电液疲劳试验机的设计i
疲劳强度试验机Tag内容描述:
1、crane V.A. Kopnov P.O. Box 64, Eknteriuburg 620107, Russian Received 3 April 1998; accepted 29 September 1998 Abstract Intrinsic fatigue curves are applied to a fatigue life prediction problem of the metalwork of a traveling gantry crane. A crane, used in the forest industry, was studied in working conditions at a log yard, an strain measurements were made. For the calculations of the number of loading cycles, the rain flow cycle counting technique is used. The operations of 。
2、metalwork of a traveling gantry crane. A crane, used in the forest industry, was studied in working conditions at a log yard, an strain measurements were made. For the calculations of the number of loading cycles, the rain flow cycle counting technique is used. The operations of a sample of such cranes were observed for a year for the average number of operation cycles to be obtained. The fatigue failure analysis has shown that failures some elements are systematic in nature and cannot。
3、程技术领域的基本试验,而疲劳试验机是研 究材料疲劳特性的基本设备。
疲劳试验机有很多种类,其中电液疲劳试验机是其中很重要的一类。
电液疲劳试验机 具有响应速度快、输出功率大、测量和控制精度高等特点,已经在航空、航天、军事、冶 金、交通、工程机械等领域得到了广泛应用。
当策动力的频率和系统的固有频率相等时,系统受迫振动的振幅最大的现象成为谐 振。
谐振式电液疲劳试验机是采用谐振原理设计的电液疲劳试验机。
这种疲劳试验机的固 有频率与系统中执行元件液压缸的容积有关,因此可以通过改变液压缸活塞的位置调节系 统的固有频率,使系统能够产生共振,从而在较低作用力下是试件产生较大的变形。
因此 它不仅具有传统电液疲劳试验机精度高、功能全、可靠性好等特点,而且效率高,节约能 源。
可以在很低的工作频率下获得高的试验负荷。
本文对谐振式电液疲劳试验机的相关概念,研究现状,发展趋势进行介绍,建立阀控 液压缸系统的数学模型,并且进行试验机执行机构液压缸和试验机机体机架的设计,并进 行必要的校核。
关键字关键字: 谐振,疲劳试验,试验机,液压缸,机架 ii Design of Resonant Electro-hydr。
4、http:/www.bisheziliao.com/p-133714.html中文5400字英文原文: Fatigue life prediction of the metalwork of a travelling gantry crane V.A. Kopnov Abstract Intrinsic fatigue curves are applied to a fatigue life predicti。
5、http:/www.bisheziliao.com/p-134326.html中文 3000 字 外文翻译 专 业 机械设计制造及其自动化 &。
6、 学 号 指导教师 职 称 二一六 年三月 1 Development of a Deflection Controlled Multlaxlal Fatigue Testing Maching This paper discusses the development of a multiaxial fatigue testig machine. The deflection controlled eccentric disk type testing machine produces mode I, mode II, or combination of both, of crack surface displacements on round or flat specimens. These loadings are necessary for research on complex multiaxial stresses which are common in engineeri。