Design optimization of surface mount device 32.768kHz quartz tuning fork-type crystals using finite element method and statistical analysis of test samples manufactured using photolithography

Vacuum ◽  
2002 ◽  
Vol 68 (2) ◽  
pp. 139-148 ◽  
Author(s):  
Sungkyu Lee
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Statistical Analysis ◽  
Design Optimization ◽  
Tuning Fork ◽  
Quartz Tuning Fork ◽  
Surface Mount ◽  
Element Method

Design Optimization for Double-T Root and Rim of Turbine Blade with Three-Dimensional Finite Element Method

2012 ◽  
Vol 215-216 ◽  
pp. 239-243
Author(s):  
Ming Hui Zhang ◽  
Di Zhang ◽  
Yong Hui Xie
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Design Optimization ◽  
Turbine Blade ◽  
Equivalent Stress ◽  
Three Dimensional ◽  
Maximum Equivalent Stress ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Element Method

As the main bearing part in a turbine blade, the root carries most of the loads of the whole blade. The improvement of the root structure can be used to enhance the operation reliability of steam turbine. The research on design optimization for double-T root and rim of a turbine blade was conducted by three-dimensional finite element method. Based on the APDL (ANSYS parametric design language), a multi-variable parametric model of the double-T root and rim was established. Twelve characteristic geometrical variables of the root-rim were optimized to minimize the maximum equivalent stress. The optimal structure of the double-T root-rim is obtained through the optimization. Compared with the original structure, the equivalent stress level of the root and rim has a significant reduction. Specifically, the maximum equivalent stress of root and rim reduces by 14.25% and 13.59%, respectively.

Introduction of a Novel and Powerful Optimization Method Using Genetic Algorithm and Finite Element Method

2012 ◽  
Vol 433-440 ◽  
pp. 746-753
Author(s):  
Payam Karimi ◽  
Shahin Shadlou ◽  
Bahare Nazari
Keyword(s):  
Genetic Algorithm ◽  
Finite Element Method ◽  
Finite Element ◽  
Design Optimization ◽  
Optimization Method ◽  
Fast Convergence ◽  
New Method ◽  
Engineering Structures ◽  
Proposed Model ◽  
Element Method

Optimizing the complicated engineering structures has always been a huge issue. A technique for the design optimization of different components is presented using genetic algorithm and finite element method. To reduce the runtime and increase the efficiently of proposed model a new method of coupling is presented. In addition, two different problems were solved using the presented model and the results showed a great and fast convergence.

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