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Question

Failures of turbine blades are frequently observed in turbomachinery.There maybe many differentcauses, but an important one is fatigue by vibration [1–3]. Detailed experiments of blade vibration are quite problematic given that installing sensors in compressors or turbine blades during operation is notoriously difficult,and instruments maybe intrusive and interfere with machine operation.Noncontact measurement
techniques have been proposed [4]; however,frequently they are very expensive or require long installation times. Numerical studies also face considerable difficulties.Not only have many blades to be modeled and computed,but also the fluid flow and its interaction with each one of the blades [5–8].
Unbalanced rotating shafts,such as turbines,that are connected to a common structure have been observed
to synchronize [9]. There also exists the definite possibility of the synchronization of the oscillations of turbine
blades fixed to a single shaft due to coupling through the fluid or the elasticity of the shaft.We know that a
single cantilever beam in the presence of cross-flow exhibits self-excited oscillations due to the interaction
between vortex shedding in the wake and the beam itself,so that the oscillations of a group of cantilever beams
coupled through a common base may synchronize too.Observation of this phenomenon has not been yet
reported,so that it is a strong and timely argument for making the present study.
谢绝用词典翻译噢，谢谢啦

Answer 1

涡轮叶片的故障常应用中观察到。可能有许多differentcauses,但却是重要的一种是[1 - 3]疲劳振动。详细叶片振动试验是相当棘手的考虑到安装传感器在压缩机在运行过程中或涡轮叶片是非常困难的,和仪器也许干涉和干扰机操作。非接触测量
技术已经提出了[4];然而,他们经常会非常昂贵或需要长久的安装时间。数值研究还面临众多困难。不但有许多叶片进行建模和计算,而且流体及其交互作用,每一个[8].叶片
平衡轴旋转,如涡轮机,,是连接到一个共同结构已经被观察到
同步[9]。也存在一定的可能性同步的振荡的涡轮机
叶片固定在单轴由于耦合通过液体或弹性轴上。我们知道一
单悬臂梁的自激振荡横流展品面前由于互动
旋涡脱落之间之后,并且激光束本身,使振荡的一群悬臂梁上
从一个公共基可以耦合同步了。这一现象的观察还没有呢
报道,所以它是一个强大的和及时的论点使当前的研究。

Answer 2

涡轮叶片的故障常应用中观察到。可能有许多不同的原因,但却重要的是一种疲惫的振动。详细叶片振动试验是相当棘手的，考虑到安装传感器在压缩机在运行过程中或涡轮叶片是非常困难的,和仪器也许干涉和干扰机操作。非接触测量技术已经提出了;然而,他们经常会花很多钱或需要长久的安装时间。数值研究还面临众多困难。不但有许多叶片进行建模和计算,而且流体及其交互作用,每一个叶片。平衡轴旋转,如涡轮机,,是连接到一个共同结构已经被观察到进行同步。也存在一定的可能性同步的振荡的涡轮机叶片固定在单轴由于耦合通过液体或弹性轴上。我们知道一单悬臂梁的自激振荡横流展品面前由于互动旋涡脱落之间之后,并且激光束本身,使振荡的一群悬臂梁上从一个公共基可以耦合同步了。这一现象的观察还没有报道,所以它是一个强大的和及时的论点使当前的研究。