Multi-objective optimization of a high-speed train head based on the FFD method

Li, Rui; Xu, Ping; Peng, Yong; Ji, Peng

doi:10.1016/j.jweia.2016.03.003

Cited by 65 publications

(38 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous studies on the pantograph monitoring system emphasizes the device functionality and artistic features in design stage (Liu et al, 2018;Marta et al, 2017;Chen, 2016;GU, 2013). Aerodynamic features of the device do not receive much attention until the end stage of the device design, when the device shape is slightly optimized based on its aerodynamic performance (Zhou et al, 2015;Branke et al, 2008;Li et al, 2016). With this design process, the aerodynamic feature of the device is not involved in topological structure innovation (Tian, 2007).…”

Section: Instroductionmentioning

confidence: 99%

Aerodynamic Shape Design of Pantograph Network Monitoring Device on High-Speed Trains

Ji¹,

Wu²,

Qian³

et al. 2019

JAFM

View full text Add to dashboard Cite

The pantograph monitoring device on high-speed trains bears not only its own strength but also the aerodynamic load applied by the air flow when the train is running at high speed. A well designed shape of the pantograph monitoring device on high-speed trains reduces the loads and pressure fluctuations acting on it, and therefore, increases its function stability and life cycle. In this paper, we present an aerodynamic shape design method for such device. Firstly, an efficient and reliable numerical simulation approach is established for the evaluation of the aerodynamic loads acting on the device. According to the numerical computations, a basic shape for the monitoring device is formed, with which the minimum functional space of the device is reserved. Then, the corners of the basic shape are smoothed out with three types of continuous transitions. By comparing the numerical results of the three smoothed shapes, we obtain an optimal aerodynamic shape for the pantograph monitoring device. The design method is not limited to the monitoring device studied in this manuscript. The aerodynamic shape of other small functional devices on high-speed trains can also be generated or optimized with the method presented herein.

show abstract

Section: Instroductionmentioning

confidence: 99%

Aerodynamic Shape Design of Pantograph Network Monitoring Device on High-Speed Trains

Ji¹,

Wu²,

Qian³

et al. 2019

JAFM

View full text Add to dashboard Cite

show abstract

“…This technique therefore enables the optimisation of complex geometries (Sun et al, 2010). It has also been widely used in different optimisation problems (Lee et al, 2011;Li et al, 2016;Sun et al, 2010).…”

Section: Geometry Regenerationmentioning

confidence: 99%

An investigation into fishing boat optimisation using a hybrid algorithm

et al. 2018

View full text Add to dashboard Cite

The optimisation of high-speed fishing boats is different from the optimisation of other displacement type vessels as, for high-speed fishing boats, the wave-making resistance decreases while the splashed resistance increases sharply. To reduce fuel consumption and operating costs in the current economic climate, this paper presents a fishing boat optimisation approach using a Computational Fluid Dynamics (CFD) technique. The RANS-VoF solver was utilised to calculate total resistance, sinkage and trim for a fishing boat in calm water. The Arbitrary Shape Deformation (ASD) technique was used to smoothly alter the geometry. A hybrid algorithm was presented to solve the complicated nonlinear optimisation problem. Herein, a Design of Experiments (DoE) method was applied to find an optimal global region and a mathematical programme was employed to determine an optimal global solution. Under the same displacement with the original hull, two optimisation loops were built with different design variables. After completion of the optimisation, two optimal hull forms were obtained. The optimisation results show that the optimisation loop presented in this study can be used to design a suitable fishing boat in the reduction of the total resistance in calm water.

show abstract

“…Chen et al (2017) employed the DES method to analyze changes in the trackside pressure caused by trains with different nose lengths according to the EN standard requirement and demonstrated that the maximum c∆p value decreased with increasing nose length in a quadratic polynomial relationship. A number of researchers have also investigated reducing the aerodynamic drag of trains by optimizing the shape of the nose (Li et al, 2016;Zhang et al, 2018). Hemida and Krajnovic (2008) studied crosswind flows around two highspeed trains with different nose shapes using LES.…”

Section: Introductionmentioning

confidence: 99%

Improved Delayed Detached Eddy Simulation of the Slipstream and Trackside Pressure of Trains with Different Horizontal Profiles

Liu

et al. 2020

JAFM

View full text Add to dashboard Cite

The slipstream caused by high-speed trains may harm pedestrians and workers trackside. In general, the characteristics of the slipstream are influenced mainly by the nose shape of the train. The present study explores the slipstream caused by high-speed trains with three different horizontal nose profiles based on the results of three-dimensional, improved delayed detached eddy simulation (IDDES) with an unsteady turbulence model and a set of 1/8th scaled train models. The results obtained using this numerical methodology are in good agreement with those obtained from corresponding wind tunnel tests. The trackside pressure changes around the train models are also captured and analyzed. The analysis reveals that the width of the nose can significantly influence the magnitude and arrival time of slipstream velocity and pressure peaks. The results and proposed numerical methodology can be used as guidelines for the design of high-speed train nose shapes.

show abstract

Multi-objective optimization of a high-speed train head based on the FFD method

Cited by 65 publications

References 22 publications

Aerodynamic Shape Design of Pantograph Network Monitoring Device on High-Speed Trains

Aerodynamic Shape Design of Pantograph Network Monitoring Device on High-Speed Trains

An investigation into fishing boat optimisation using a hybrid algorithm

Improved Delayed Detached Eddy Simulation of the Slipstream and Trackside Pressure of Trains with Different Horizontal Profiles

Contact Info

Product

Resources

About