Engineering Computations: Volume 36 Issue 5

Design of fluid components using the topological optimization method

L.C. Ruspini, E. Dari, C. Padra, G.H. Paissan, N.N. Salva

The purpose of this paper is to present applications of the topological optimization method dealing with fluid dynamic problems in two- and three dimensions. The main goal is to…

Investigation on cohesive zone model of bolted joint for water conveyance tunnel lining

Bingqi Li, Zhenyu Zhang, Xiaogang Wang, Xiaonan Liu

The behavior of joints has a significant effect on the stability of water conveyance tunnel. The purpose of this paper is to study the contact and friction at the joint of the…

Numerical investigationof clocking effect of impellerson a multistage pump

Minggao Tan, Yichao Lian, Xianfang Wu, Houlin Liu

The purpose of this paper is to investigate the clocking effect of impellers and the superposition between pump stages caused by clocking effect in a five-stage centrifugal pump…

Creating better dynamic relaxation methods

M. Rezaiee-Pajand, Hossein Estiri, Mohammad Mohammadi-Khatami

The purpose of this study is to demonstrate that using appropriate values for fictitious parameters is very important in dynamic relation methods. It will be shown that a better…

Analysis of the influence of soft soil grouting on the metro tunnel based on field measurement

Zhi Ding, Xiao Zhang, Xinsheng Yin, Jiqing Jiang

This paper aims to analyse the effect of soft soil grouting on the deformation of the closed shield tunnel with the measured data.

Multi-objective optimization in face milling process with cryogenic cooling using grey fuzzy analysis and BPNN-GA methods

Bobby Oedy Pramoedyo Soepangkat, Rachmadi Norcahyo, Bambang Pramujati, M. Abdul Wahid

The purpose of this study is to investigate the prediction and optimization of multiple performance characteristics in the face milling process of tool steel ASSAB XW-42.

A nonstandard finite difference technique for singular Lane-Emden type equations

Michael Chapwanya, Robert Dozva, Gift Muchatibaya

This paper aims to design new finite difference schemes for the Lane–Emden type equations. In particular, the authors show that the schemes are stable with respect to the…

Numerical simulation and experiment for study on internal flow pattern of vortex pump

Hui Quan, Yi Chai, Rennian Li, Jianhui Guo

The special structure of the vortex pump contributes to its complex internal flow pattern. A type of horizontal 150WX-200-20 vortex pump is taken as a research subject to deeply…

A new strategy for describing the characteristics of bending line in flexible push bending

Zengkun Zhang, Jianjun Wu, Qi Shang, Qiang Jiang, Junzhou Yang, Ruichao Guo

When manufacturing an arc-shaped tube product using push bending process, the transition zone and outfeed zone will inevitably occur. Transition zone and outfeed zone are caused…

Sensitivity analysis based on variance decomposition for factors in bat algorithm

Shi Yin, Ming Zhu

This paper aims to quantify the dependence relationship of bat algorithm’s (BA) behaviour on the factors that could possibly affect the outputs, and rank the importance of the…

An adaptive order response surface method for structural reliability analysis

Wentong Zhang, Yiqing Xiao

Balancing accuracy and efficiency is an important evaluation index of response surface method. The purpose of this paper is to propose an adaptive order response surface method…

A comparison investigation of the contact models for contact and vibration features of cylindrical roller bearings

Jing Liu, Linfeng Wang, Zhifeng Shi, Wennian Yu, Huifang Xiao

The purpose of this study is to investigate the contact models for contact and vibration features of cylindrical roller bearings (CRBs). CRBs are important parts of rotating…

From the natural continuum to the elastic spring cell in three and two dimensions -- a flexibility approach

I St Doltsinis

The employment of spring cell substitutes for the numerical analysis of solids and structures in place of finite elements has occasioned research on the subject with regard to…

A Tukey’s g-and-h distribution based approach with PSO for degradation reliability modeling

Jinbao Zhang, Yongqiang Zhao, Ming Liu, Lingxian Kong

A generalized distribution with wide range of skewness and elongation will be suitable for the data mining and compatible for the misspecification of the distribution. Hence, the…

DEM-aided method for predicting the hydraulic properties with particle-size distribution of porous media

Han-Cheng Dan, Zhuo-Min Zou, Jia-Qi Chen, An-Ping Peng

The soil water retention curve (SWRC) and unsaturated hydraulic conductivity (UHC) are crucial indices to assess hydraulic properties of porous media that primarily depend on the…

A novel chaotic bat algorithm based on catfish effect for engineering optimization problems

Wensheng Xiao, Qi Liu, Linchuan Zhang, Kang Li, Lei Wu

Bat algorithm (BA) is a global optimization method, but has a worse performance on engineering optimization problems. The purpose of this study is to propose a novel chaotic bat…

Application of biharmonic equation in impeller profile optimization design of an aero-centrifugal pump

Xianwei Liu, Huacong Li, Xinxing Shi, Jiangfeng Fu

The purpose of this paper is to improve the hydraulic efficiency without changing the overall dimension. The blade profile optimization design of the aero-centrifugal pump based…