Design Optimization of Tilting-Pad Journal Bearing Using a Genetic Algorithm

This article focuses on the use of genetic algorithms in developing an efficient optimum design method for tilting pad bearings. The approach optimizes based on minimum film thickness, power loss, maximum film temperature, and a global objective. Results for a five tilting-pad preloaded bearing are presented to provide a comparison with more traditional optimum design methods such as the gradient-based global criterion method, and also to provide insight into the potential of genetic algorithms in the design of rotor bearings. Genetic algorithms are efficient search techniques based on the idea of natural selection and genetics. These robust methods have gained recognition as general problem solving techniques in many applications.

Download Full-text

Optimum design method for four-bar function generator using AIS and genetic algorithms

2013 IEEE INISTA ◽

10.1109/inista.2013.6577639 ◽

2013 ◽

Author(s):

Morteza Saeidi Javash ◽

Mir Mohammad Ettefagh ◽

Yousof Ebneddin Hamidi

Keyword(s):

Genetic Algorithms ◽

Optimum Design ◽

Design Method ◽

Function Generator

Download Full-text

A Study on Heredity and Evolution of Designs Considering Kansei by Using Genetic Algorithms

Volume 2: 11th Biennial Conference on Reliability, Stress Analysis, and Failure Prevention; 7th International Conference on Design Theory and Methodology; JSME Symposium on Design and Production; Mechanical Design Education and History; Computer-Integrated Concurrent Design Conference ◽

10.1115/detc1995-0208 ◽

1995 ◽

Author(s):

Hiroshi Yamakawa ◽

Masao Arakawa ◽

Nobuyuki Katsuyama

Keyword(s):

Genetic Algorithms ◽

Optimum Design ◽

Design Process ◽

Design Method ◽

Semantic Differential ◽

Front View ◽

Numerical Examples ◽

Interface System ◽

Original Feature

Abstract A new concept on the heredity and evolution of designs was proposed and an optimum design method based on the concept was developed newly by one of the authors. Several kinds of needs for designs may exist and users of some products are not satisfied with the functions of the products but also with their sensuous beauties or impressions of shapes and materials. To consider such sensous quality of the products was called “Kansei designs” in Japan and have become of interest and important lately (Nagamachi, 1989). In this study we introduce the same concept on heredity and evolution of designs as in the previous reports shown in Fig.1 (Yamakawa, 1994) and present a general design method to consider the Kansei design into ordinary, design process by making use of both SD (Semantic Differential) and the Genetic Algorithms. In order to support designer’s impressions, we also consider to take for other features Kansei estimation, which is similar to the original feature and easier to take “Kansei”, into account and developed an interface system which can show the transition of feature during GA process. Front view designs of a car are taken as simple numerical examples and the effectiveness of the proposed method is examined.

Download Full-text

A Unified Multidisciplinary Optimum Design Method Using Genetic Algorithms

20th Design Automation Conference: Volume 2 — Robust Design Applications; Decomposition and Design Optimization; Optimization Tools and Applications ◽

10.1115/detc1994-0143 ◽

1994 ◽

Author(s):

Hiroshi Yamakawa

Keyword(s):

Genetic Algorithms ◽

Optimum Design ◽

Design Process ◽

Design Method ◽

Numerical Results ◽

Hierarchical System ◽

Engineering Analysis ◽

Design Processes ◽

Strong Interest

Abstract Multidisciplinary optimum designs have been of strong interest lately in many fields. A unified multidisciplinary optimum design method by utilizing the genetic algorithms is presented in this study. The design process is modeled there by a distributed hierarchical system to simulate ordinary design processes. Each level is optimized by genetic algorithms somewhat independently but some information is transmitted to the upper or the lower level. Engineering analysis can also be involved in a certain level. The proposed method is then applied to simple examples of preliminary designs of cars and numerical results show the effectiveness of the method.

Download Full-text

Study on optimum design method for pleasant outdoor thermal environment using genetic algorithms (GA) and coupled simulation of convection, radiation and conduction

Building and Environment ◽

10.1016/j.buildenv.2006.11.039 ◽

2008 ◽

Vol 43 (1) ◽

pp. 18-30 ◽

Cited By ~ 53

Author(s):

Hong Chen ◽

Ryozo Ooka ◽

Shinsuke Kato

Keyword(s):

Genetic Algorithms ◽

Optimum Design ◽

Thermal Environment ◽

Design Method ◽

Coupled Simulation ◽

Outdoor Thermal Environment

Download Full-text

Road Horizontal Alignment Design Method for Continuous Loop Area in Autonomous Vehicles Proving Ground Based on Genetic Algorithms

CICTP 2020 ◽

10.1061/9780784483053.163 ◽

2020 ◽

Author(s):

Junyi Chen ◽

Rubing Li ◽

Xingyu Xing ◽

Lu Xiong

Keyword(s):

Genetic Algorithms ◽

Autonomous Vehicles ◽

Design Method ◽

Horizontal Alignment ◽

Loop Area

Download Full-text

Improvement of Tilting-Pad Journal Bearing Operating Characteristics by Application of Eddy Grooves

Lubricants ◽

10.3390/lubricants9020018 ◽

2021 ◽

Vol 9 (2) ◽

pp. 18

Author(s):

Eckhard Schüler ◽

Olaf Berner

Keyword(s):

High Speed ◽

Journal Bearing ◽

Load Capacity ◽

Fluid Film ◽

Operating Characteristics ◽

Fluid Film Bearings ◽

Tilting Pad ◽

Bearing Load ◽

Bearing Loads ◽

Tilting Pad Journal Bearing

In high speed, high load fluid-film bearings, the laminar-turbulent flow transition can lead to a considerable reduction of the maximum bearing temperatures, due to a homogenization of the fluid-film temperature in radial direction. Since this phenomenon only occurs significantly in large bearings or at very high sliding speeds, means to achieve the effect at lower speeds have been investigated in the past. This paper shows an experimental investigation of this effect and how it can be used for smaller bearings by optimized eddy grooves, machined into the bearing surface. The investigations were carried out on a Miba journal bearing test rig with Ø120 mm shaft diameter at speeds between 50 m/s–110 m/s and at specific bearing loads up to 4.0 MPa. To investigate the potential of this technology, additional temperature probes were installed at the crucial position directly in the sliding surface of an up-to-date tilting pad journal bearing. The results show that the achieved surface temperature reduction with the optimized eddy grooves is significant and represents a considerable enhancement of bearing load capacity. This increase in performance opens new options for the design of bearings and related turbomachinery applications.

Download Full-text

Theoretical and Experimental Investigations on Directly Lubricated Tilting Pad Journal Bearing under Starved Lubrication

Tribology Transactions ◽

10.1080/10402004.2021.1890289 ◽

2021 ◽

pp. 1-17

Author(s):

Yang Hu ◽

Tasuku Masuda ◽

Chihiro Yoshimine ◽

Yonggang Meng

Keyword(s):

Journal Bearing ◽

Experimental Investigations ◽

Tilting Pad ◽

Starved Lubrication ◽

Tilting Pad Journal Bearing

Download Full-text

Dynamic Analysis of Tilting-Pad Journal Bearing—Influence of Pad Deformations

Journal of Tribology ◽

10.1115/1.2928890 ◽

1994 ◽

Vol 116 (3) ◽

pp. 621-627 ◽

Cited By ~ 25

Author(s):

H. Desbordes ◽

M. Fillon ◽

C. Chan Hew Wai ◽

J. Frene

Keyword(s):

Film Thickness ◽

Pressure Field ◽

Journal Bearing ◽

Maximum Pressure ◽

Tilting Pad ◽

Minimum Film Thickness ◽

Dimensional Finite Element ◽

The One ◽

Tilting Pad Journal Bearing ◽

Tilting Pad Journal Bearings

A theoretical nonlinear analysis of tilting-pad journal bearings is presented for small and large unbalance loads under isothermal conditions. The radial displacements of internal pad surface due to pressure field are determined by a two-dimensional finite element method in order to define the actual film thickness. The influence of pad deformations on the journal orbit, on the minimum film thickness and on the maximum pressure is studied. The effects of pad displacements are to decrease the minimum film thickness and to increase the maximum pressure. The orbit amplitude is also increased by 20 percent for the large unbalance load compared to the one obtained for rigid pad.

Download Full-text