| 1. | Numerical realization of francis turbine blade design and wooden patterns
混流式水轮机叶片设计与木模图的数值实现 |
| 2. | Establishing of simulation environment for multi - axis machining of hydro turbine blades
水轮机叶片多轴数控加工的仿真环境构建 |
| 3. | Secondly , it realized the whole structure of francis turbine blade surface . thirdly , it accomplished the computation of blade incidence
第三，针对水轮机叶片的特点，完成了各圆柱面叶栅进口安放角的求解算法。 |
| 4. | Cracking reasons of the turbine runner are extensive . the fact shows that the leading reason induced cracking is exorbitant stress
水轮机叶片开裂的原因是多方面的,实践表明:应力过高是导致转轮叶片开裂最为主要的原因。 |
| 5. | With the increasing of capacity of hydrodynamic motor generator , water turbine ' s blade run in villainous environment . it is n ' t advantageous to the safety of the blade
随着水轮发电机组容量的不断增大，水轮机叶片处于更为恶劣的环境中运行，这对叶片的安全十分不利。 |
| 6. | Therefrom , the finite element movement equations of moving characteristics of blade is derived and the finite element movement equations of vibration characteristic is gained
由此，推导出空间八结点非协调单元描述水轮机叶片运动特性的叶片运动有限元方程，进一步得出了叶片振动特性的有限元方程。 |
| 7. | In order to lessen labor intensity and increase the welding and grinding precision and efficiency of the robot , introducing and exploring a repair robot used for welding and grinding on the turbine blades is very useful for those plants
为了减少人工修复的劳动强度，提高维护、维修的质量和效率，我们引进并自行开发了适合于我国国情的水轮机叶片修复专用机器人。 |
| 8. | The numerical simulation computations of the three dimensional viscosity fluids are done to research the turbomachinery properties , which includes the determination of the computation equation , the finite mesh and the determination of boundary conditions
进行了水轮机叶片切割前后转轮内部三维粘性流的数值模拟计算，其中包括方程的确立、方程的变换和离散、边界条件的确定。 |
| 9. | This thesis discusses the problem free - surface modeling technique of turbine blade according to the property of the runner blade and the present research achievement in free - surface modeling technique , the major study concerned are introduced below : firstly , it accomplished the study of intersection for blade - to - plane and present the method of three - step algorithms such as subdivision > iterative refinements approach ; meanwhile it solved the problem of small area extend of blade by use minimal modulus method
本文针对水轮机叶片的特点，结合曲面造型技术的研究现状，研究了水轮机叶片的nurbs曲线曲面造型问题。主要工作有：第一，完成了叶片与任意平面求交问题的研究，提出分割-迭代-拟合三步求交算法。同时首次应用最小二乘拟合端部法解决了叶片的小区域延展问题。 |
| 10. | To this problem , on the basis of the work property and characteristics of the water turbine ' s blade . the finite element mechanics model of blade vibration characteristic is described with the eight - node three - dimensional nonconforming and all parts of blade damp are analysised , the calculating model of blade damp is built , the tackling method of blade damp in calculating of dynamic stress is presented
本文根据水轮机叶片的特点和工作性质，采用空间八结点非协调等参单元描述水轮机叶片运动特性的有限元力学模型，详细分析了水轮机叶片阻尼各组成部分，并建立了叶片阻尼的计算模型，提出了叶片阻尼在动应力计算中的处理方法。 |
