shrouded blade meaning in Chinese
带冠叶片
有围带的叶片
罩筒叶片
Examples
- Coupled vibrations of gas turbine shrouded blades
燃气轮机带冠叶片耦合振动分析 - An aeroengine power - turbine 1 ( superscript st ) stage rotor shrouded blade is taken for an example in the article , tightness of shroud and contact force 、 blade body stress under working state and assembly state are calculated by finite element contact analysis method , influence of working load ( temperature and centrifugal force ) is mainly analyzed
摘要以航空发动机动力涡轮一级带锯齿形叶冠的转子叶片为例，用有限元接触分析方法对装配和工作状态下的叶冠紧度和叶冠接触力、叶身应力进行了计算和分析，着重考察了工作载荷（温度和离心力）对叶冠接触力的影响。 - Presents the model proposed for analyzing the vibration characteristics of shrouded blades and their calculation method by employing a wave propagation theory and modal synthesis technology coupled with a finite element method from the view point it is possible not only to conduct frequency modulation of the shrouded blades of a gas turbine , but also to utilize the friction effects between them to dissipate energy , thereby attaining the aim of vibration alleviation , as shrouded blades have been widely used in the design of high - speed turbomachinery , such as modern gas turbines and steam turbines , and with the shrouded blades forming an integral whole in a centrifugal force field , the vibration characteristics of the whole ring of blades are different from those of a single isolated blade , and this makes it essential to take into account the integral effect of blade shrouds , concludes from the calculation examples and engineering application that the above approach is valid and correct along with the possibility of considerably reducing the scale of calculation and analysis , and points out it is necessary to take into consideration the coupled effect of the whole ring of blades while the dynamic characteristics of shrouded blades is being analysed
带冠叶片不但能调频，还可以利用叶冠之间的摩擦效应来耗散能量，达到减振的目的.带冠叶片在离心力场中形成一整体，其整圈叶片振动特性不同于单个孤立叶片，需考虑叶冠的整体效应.利用带冠叶片系统的循环对称性，提出了采用波传播理论和模态综合技术，结合有限元方法研究燃气轮机带冠叶片振动特性的分析模型和计算方法.算例和工程应用证明了该方法是效性的、正确的，并可以大大降低计算分析规模.研究表明带冠叶片动力特性分析时必须考虑整圈叶片的耦合效应 - As the deformation caused by centrifugal force is beyond the small deformation range , the large deformation effect was also taken into account in the equation . two models are constructed , one is of shrouded blade and the other is of bladed disc . the static natural frequencies and dynamic frequencies ( under 3000rpm ) are calculated by the finite element method and cyclic symmetry technique
针对叶片的结构特点,采用适应较强的三维八节点实体单元模拟叶片,建立叶片运动微分方程;叶片?轮盘系统在高速旋转时,受到离心力作用,使叶片发生大变形,故在方程中考虑了几何大变形的问题;为研究叶根轮缘之间的接触状态,建立了考虑叶根?轮缘接触的有限元方程,利用拉格朗日增广算法来求解该方程,确定叶根轮缘之间的接触面状态。