On coupling methods used to simulate the dynamic characteristics of heavy ground vehicles subjected to crosswind

Tunay, Tural; Drugge, Lars; O’Reilly, Ciarán J.

doi:10.1016/j.jweia.2020.104194

Cited by 15 publications

(12 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The turbulent kinetic energy k and the turbulent dissipation  are defined in Equation (12) and Equation (13).…”

Section: Standard K- Turbulence Modelmentioning

confidence: 99%

“…Therefore, the heavy ground vehicles can be encountered in danger of rolling over. Hence, in thus study, aerodynamic and vehicle dynamics were investigated roll and lateral dynamics of heavy ground vehicle under subjected of crosswind [12]. The aerodynamic study related with simplified ground vehicle was also presented using particle image velocimetry (PIV) technique.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Shape modification of Ahmed body to reduce drag coefficient and determination of turbulence model

Şumnu¹

2021

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

View full text Add to dashboard Cite

In this study, the aerodynamic analysis of Ahmed body which is generic automobile model is performed to determine convenient turbulence model and reduce drag coefficient by modifying shape of model. For this purpose, Computational Fluid Dynamics (CFD) analysis is carried out using different turbulence models that are Spalart-Allmaras, (Shear Stress Transport) SST k-, Standard k-, Realizable k-, (Re-Normalisation Group) RNG k- turbulence models. The results are compared with experimental data that is available in literature. The results show that RNG k- turbulence model gives superior performance when compared with other models. In order to reduce drag coefficient, the upper region of sides of model is rounded by applying fixed blend radius with 25 mm. The smooth surface can provide high performance in point of aerodynamics. CFD solution is then repeated for the modified model and the result show that drag coefficient value reduces about 6%. In addition, the second modification is performed by applying fixed blend radius with rounded both upper sides and rear underside of body and chamfer with 50 mm is also applied to rear sides of body. However, drag coefficient reduction level is approximately same with first modified model. The pressure coefficient contours and velocity streamlines are presented to show results for baseline and modified bodies.

show abstract

“…The turbulent kinetic energy k and the turbulent dissipation  are defined in Equation (12) and Equation (13).…”

Section: Standard K- Turbulence Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Shape modification of Ahmed body to reduce drag coefficient and determination of turbulence model

Şumnu¹

2021

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

View full text Add to dashboard Cite

show abstract

“…Kim et al (2016) evaluate the vulnerability of crosswind hazards as vehicles cross bridge, and propose a safety assessment procedures after considering the probability of vehicle sideslip and overturning. Tunay et al (2020) investigate the lateral and roll dynamics of heavy vehicles subject to crosswind gusts. Xiong et al (2020) propose a novel wind-traffic-bridge (WTB) interaction model to predict the dynamic performance of long-span bridges and vehicles under crosswinds based on the actual traffic behavior and vehicle inertia forces.…”

Section: Introductionmentioning

confidence: 99%

Safety analysis of road vehicles overtake on cables-Stayed bridge under crosswinds

Chen

Wang

et al. 2022

Advances in Structural Engineering

View full text Add to dashboard Cite

It is inevitably to encounter overtaking events as vehicles pass through long-span bridges under crosswinds. The effects of the aerodynamic interference on the dynamic responses of the overtaking vehicles should be taken into account in the analysis of the driving safety of vehicles under crosswinds. The time-varying aerodynamic coefficients of the overtaking vehicles are obtained by scale model wind tunnel tests. A vehicle dynamic model is established for the analysis of the dynamic responses of articulated lorry. Based on the coupling vibration framework of the wind-vehicle-bridge system, an improved dynamic analysis system is constructed to solve the transient aerodynamic responses of the overtaking vehicle. It investigates the effects of the overtaking events on the driving safety of vehicles on bridge deck under crosswinds. The results show that the interference aerodynamic forces produced during the overtaking process have significant influences on the dynamic responses of vehicles. The maximum load transfer ratio and side-slip factor of vehicles in consideration of the effects of overtaking event are much greater than the case taking no account of the interference aerodynamic forces. Although the overtaking event do not play a decisive role in the driving safety of vehicles crossing the bridge, it is necessary to consider the combined adverse effects of the overtaking event and crosswinds on the safety of vehicles.

show abstract

“…Additionally, there are other studies in the literature that conducted two-way coupled aerodynamics and vehicle dynamics simulation in crosswind sensitivity investigations of vehicles. 6,7,[18][19][20][21][22][23][24][25][26][27][28][29] However, none of them conducted an investigation that included crosswind with various frequencies, that is they employed only one frequency of crosswind. Therefore, the interactions between crosswind of various frequencies, vehicle dynamics and corresponding driver's steering inputs need to be understood in detail.…”

Section: Introductionmentioning

confidence: 99%

“…32,33 The GTS was employed by many researchers to understand the characteristics of flow features around heavy ground vehicles. [32][33][34][35][36][37][38] Furthermore, Winkler et al 20 and Tunay et al 28,29 employed the GTS to investigate the effects of crosswinds on the dynamic characteristics of heavy ground vehicles.…”

Section: Introductionmentioning

confidence: 99%

Two-way coupled aerodynamics and vehicle dynamics simulations of a heavy ground vehicle subjected to crosswind of various frequencies

Tunay

2022

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

The present study investigates the dynamic characteristics of a heavy ground vehicle subjected to crosswind with various frequencies using two-way coupled simulations between aerodynamics and vehicle dynamics, including the driver’s steering inputs. Four different reduced frequencies of crosswind, which are equal to 4.2, 2.1, 1.3 and 0.9, are used. The results show that the absolute maximum magnitudes of the vehicle’s lateral dynamic and aerodynamic characteristics increase inversely proportional with the reduced frequencies of crosswinds without the driver’s steering input. However, when the driver’s steering input is included in the vehicle’s response to the crosswind disturbances, the vehicle’s lateral dynamic characteristics increase by the largest amount for reduced frequencies of 1.3 and 2.1. Furthermore, for a reduced frequency of 0.9, the driver’s steering inputs attenuate the unfavourable amplifications in the vehicle’s lateral dynamic characteristics. In the present study, the reasons for the increase in the vehicle’s lateral dynamic characteristics in the cases of reduced frequencies equal or greater than 1.3 with the driver’s steering input are explained. Additionally, the results show that the vehicle is not controlled within the 0.5 m lateral margins of the road when the steering starts with a time delay of 1.0 s for reduced frequencies equal to or lower than 2.1.

show abstract

On coupling methods used to simulate the dynamic characteristics of heavy ground vehicles subjected to crosswind

Cited by 15 publications

References 27 publications

Shape modification of Ahmed body to reduce drag coefficient and determination of turbulence model

Shape modification of Ahmed body to reduce drag coefficient and determination of turbulence model

Safety analysis of road vehicles overtake on cables-Stayed bridge under crosswinds

Two-way coupled aerodynamics and vehicle dynamics simulations of a heavy ground vehicle subjected to crosswind of various frequencies

Contact Info

Product

Resources

About