1.The calculation and design includes the calculating the balance angle, extending of the blade on both sides, extending of the blade on the tip and on the root, expanding of the surfaces of the blade, changing the data on the consideration of the shrinking and the reflecting of the blade material, the blade body modeling, the rabbet modeling, the boss modeling, etc.
本文研究了锻件叶身型面设计中型面数据转化所需进行的计算方法和依据,包括平衡角计算、进排气边延伸、叶尖叶根延伸、叶身型面余量加放和叶身的收缩和回弹,叶身实体的造型方法,榫头的设计计算和定位凸台的设计计算等。
2.The influence of centrifugal force on the free frequency of round saw blade for metal hot-cutting is analyzed with FEM software. The result indicates that the centrifugal force will increase the free frequency of saw blade, especially for low-frequency, thereby the influence of centrifugal force on the free frequency of saw blade should be considered during the acoustic vibration property of saw blade is studied.
利用有限元软件分析了旋转离心力对金属热切圆锯片固有频率的影响,结果表明:离心力使锯片的固有频率有所提高,对于低阶频率尤其明显,因此研究锯片声振特性时应考虑离心力对固有频率的影响。
3.Through repairing the worn parts of four hydropower stations of Xinzhuang,Zaoqi,Suide and Qiemo,and taking some comprehensive anti-abrasion measures,such as checking and repairing the runner blade,cutting the head of blade into round shape,adding an apron to the outer edge of blade and increasing a guiding plate in the head of blade,a good effectiveness has been gained so that it increases the output of generating unit and enhances the abrasion resistant capacity.
通过对新庄、枣渠、绥德、且末4个水电站的磨蚀破坏部件的修复、转轮叶片测型与修型、叶片头部割圆角、叶片外缘加裙边、头部加导流板等抗磨蚀措施的综合治理，取得较好效果，使机组出力增加、抗磨蚀能力提高。
4.The structural parameters which are the precone, droop, sweep, collective pitch, blade preinstall, blade pretwist, pitch link stiffness, torque offset and blade root offset are included in the analytical model which is commonly suitable for study of aeroelastic stability of hingeless rotor blade.
分析模型包括预锥角、下垂角、预掠角、总距角、桨根预安装角、桨叶预扭角、变距轴偏置、根部外伸量和操纵线系刚度等结构参数，对无铰旋翼桨叶气弹稳定性研究有普遍适用意义。
5.It realized anticipated goals of the application of turbine blade and engineering exercises. Thus, it provide the foundation to the reconstruct and optimize design of turbine blade as well as the CAM of turbine blade.
算例结果表明，上述方法不仅可精确拟合混流式、轴流式水轮机转轮叶片，而且还能对叶片进行求交、延展运算并控制精度，实现了Nurbs曲面造型技术应用于水轮机叶片设计和工程实际的预期目标，为水轮机叶片的改型设计和优化设计、水轮机叶片的计算机辅助制造打下了基础。
6.Because of the limitation of pages,the authors only report the detailed computing chart,but omit the computer program. At the end of this paper the authors give the numerical results using NACA 0012 blade section,which show the functional dependence of power coefficient,blade section angle of attack,axial interference factor,starting moment coefficient on tip speed ratio,aspect ratio,solidity and blade bank angle,and make a brief discussion.
给出了详细的计算框图和采用NACA0012叶型的一些数值试验结果,表明了风力机的功率系数、叶型攻角、轴向干扰因子和起动力矩系数随着速度比、展弦比、实度和叶片倾角的变化关系,并作了简要讨论。
7.By using the fundamental theory of modal analysis and CRAS system,this article presents the measurement method of modal parameters of blade and gives the way to measure the modal parameters of blade of home?made turbine , then analyzes the causes of blade failure. ?
应用模态分析的基本原理和CRAS系统,提出了叶片模态参数的测试方法,并对某厂国产300MW汽轮机叶片进行实测,分析讨论叶片断裂事故的原因。
8.If you cannot see the vocal cords or epiglottis after positioning the laryngoscope blade, you have probably inserted the blade too far or have not placed the blade precisely in the midline.
如果在调整好喉镜窥视片位置后，不能观察到声带或会厌，可能是由于窥视片插入太深或未能将其精确地放置于正中线所致。
9.Therefore,for the adjustable blade spiral mixed flow pump,the design of fixed guide blade should be paid attention to and the tip clearance of blade should be rationally selected.
因此，对于可调叶片蜗壳式混流泵应重视固定导叶的设计，合理地选择轮缘间隙的大小。
10.In the result of a series of experiments the relationships of blade flutter margin with rotor rotational speed,effective CG position of blade in chord and torsional stiffness of blade have been obtained.
通过激桨叶的扭转频率、测桨叶的挥舞响应，试验得到了桨叶颤振裕度与旋翼转速、桨叶弦向有效重心位置及桨叶扭转刚度之间的关系，即桨叶颤振裕度随旋翼转速的提高而降低；
