cyclic symmetry meaning in Chinese
循环对称
Examples
- Cyclic symmetry in blade - disc assembles is often destroyed by small differences in the individual blades ’ structural properties that result from manufacturing and material tolerance , this phenomenon commonly knows as mistuning
叶片?轮盘的周期对称性经常由于制造、材料以及非均匀磨损和其他因素被破坏,引起系统出现失调现象。 - The results indicated that the centrifugal force reduces the localization ; when the young ’ s modulus of all blades are in the tolerance of 5 % , the blade - disc can regarded as an cyclic symmetry system
结果表明,离心力对失调叶片轮盘系统局部化振动有减弱作用;所有叶片弹性模量在5 %误差范围的随机失调系统,其固有频率与非失调相差很小,即失调叶片?轮盘系统可以按照循环对称结构进行模态分析。 - The result of the calculation for tip clearance is reasonable when it is compared with theory . two ways are put forward for convention of dimension of the turbine components from high temperature to low one , which is related with tip clearance , a simple example is used to illuminate that the two ways are useful , using the method of design optimization , axiisk and a blade of a certain turhine is analysed , it showes that the method of design optimization is feasible to be used for convertion of dimension of the turbine components . finally , ansys software is used to analyzed the variation of tip clearance with the method of cyclic symmetry analysis when engine works under the conditions of temperature and rotational speed , am using a new method to deal with thermal contact resistance in the calculation
本文完善了计算涡轮叶尖间隙的简化算法程序，增加了程序的计算功能，并将其应用于某高压涡轮进行叶尖间隙分析，所得结果与理论结果进行了对比，得出修改后的程序用于叶尖间隙计算是合理的；同时提出了与叶尖间隙相关的涡轮典型部件的冷、热态的尺寸两种换算方法，使用优化设计的方法进行了实例分析，说明了所提出的计算方法是可行的；最后应用ansys有限元软件利用循环对称的方法分析了某型发动机高压涡轮在温度场及离心力作用下的叶尖间隙在发动机工作过程中变化情况，并分析了计算中的接触热阻的处理问题。 - 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。 - A simplify high pressure turbine ( hpt ) tip clearance model is analyzed with the cyclic symmetry method . research on the flow , heat and structure integration analyses is achieved in this paper . flow / heat analysis is done by fluent software , and heat / structure analysis is done by ansys software
针对涡轮部件的结构特点,进行了适当的简化,利用参数化设计思想建立了涡轮叶尖间隙计算模型,用循环对称的方法分析了某型发动机高压涡轮叶尖间隙在工作过程中变化的情况。