Research on Safety of Freeway Off-Ramp Lane Changing Behavior Based on Lateral Force Coefficient

2015 ◽  
Author(s):  
W. J. Du ◽  
G. D. Xia ◽  
F. Chen ◽  
X. D. Pan
Keyword(s):  
Lateral Force ◽  
Force Coefficient ◽  
Lane Changing ◽  
Behavior Based

Forecasting Freeway On-Ramp Lane-Changing Behavior Based on GRU

2021 ◽  
Vol 147 (12) ◽  
Author(s):  
Jieming Cui ◽  
Guizhen Yu ◽  
Bin Zhou ◽  
Qiujun Liu ◽  
Zhengguo Guan
Keyword(s):  
Lane Changing ◽  
Behavior Based

Investigation and Comparison of Tires Perfomance on Ice

2017 ◽  
Author(s):  
Andrius Ružinskas ◽  
Henrikas Sivilevicius
Keyword(s):  
Lateral Force ◽  
Operating Conditions ◽  
Slip Angle ◽  
Transmission Measurement ◽  
Force Transmission ◽  
Force Coefficient ◽  
Slip Ratio ◽  
The Road ◽  
Tire Force ◽  
Main Component

The risk of accident increases significantly when tire rolls on ice comparing to the dry surface. The vehicle tire becomes the main component of force transmission to the road and necessity of investigating the tire behavior becomes of high importance. This paper presents results of tire force transmission measurement with two different winter tires at the same operating conditions. Longitudinal and lateral force coefficient characteristics as the functions of slip ratio and slip angle are presented and discussed. The results showed a different lateral and longitudinal performance because of different tread pattern and rubber compound.

Experimental Study and Hydrodynamic Performance Analysis of a Bio-Tail Fin Propellant System

2009 ◽  
Vol 419-420 ◽  
pp. 77-80 ◽  
Author(s):  
Yu Min Su ◽  
Shi Qi Zhao ◽  
Liang Yang
Keyword(s):  
Experimental Data ◽  
Lateral Force ◽  
Hydrodynamic Performance ◽  
Force Coefficient ◽  
Thrust Coefficient ◽  
Propulsion Efficiency ◽  
Design Concepts ◽  
Torque Coefficient ◽  
Precise Experimental Data ◽  
Selection Of

In order to research the bionic mechanics in unsteady flow and the hydrodynamic performance of the oscillating tail fin, in this paper, an experimental device imitating bionic tail fin were built, the design concepts and the rolling systems of the mechanical tail fins were demonstrated, including the procedures and correlated works on the selection of the servo motors, online control and signal data collecting and processing. The movements of the mechanical tail fin could be optimized by the comparisons of the propulsion efficiency, thrust coefficient, lateral force coefficient and torque coefficient at different conditions. Meanwhile, error analysis is carried out to correct the movement curves and obtain more precise experimental data and results.

Study on Vehicle Lane-Changing Behavior Based on Cellular Automaton

2018 ◽  
Vol 12 (1) ◽  
pp. 75-80
Author(s):  
Juan Li ◽  
Da-yi Qu ◽  
Cong Liu ◽  
Jin-zhan Wang ◽  
Xiang-hua Xu
Keyword(s):  
Cellular Automaton ◽  
Lane Changing ◽  
Behavior Based

Test Research on Aerodynamic Interference Effect on Aerostatic Coefficients of Main Beam in Parallel Bridge

2012 ◽  
Vol 178-181 ◽  
pp. 2131-2134
Author(s):  
Jie Wang ◽  
Jian Xin Liu
Keyword(s):  
Wind Tunnel ◽  
Drag Coefficient ◽  
Wind Tunnel Test ◽  
Lateral Force ◽  
Main Beam ◽  
Interference Effects ◽  
Force Coefficient ◽  
Long Span ◽  
Rigid Frame ◽  
Aerodynamic Interference

Against the problem of the aerodynamic interference effects on aerostatic coefficients between parallel continuous rigid frame bridges with high-pier and long-span, the aerodynamic interference effects on aerostatic coefficients of main beam in the parallel long-span continuous rigid frame bridges were investigated in details by means of wind tunnel test. The space between the two main beams and wind attack angles were changed during the wind tunnel test to study the effects on aerodynamic interferences of aerostatic coefficients of main beam. The test got aerostatic coefficients of 10 conditions. The research results have shown that the aerodynamic interference effects on aerostatic coefficients of main beam in parallel bridges can not be ignored. The aerodynamic interference effects on parallel bridge main beam is shown mainly as follows: The drag coefficient of main beam downstream dropped and the drag coefficient of main beam upstream changed but not change significantly. There are also the aerodynamic interference effects of lateral force coefficient and torque coefficient between the main beams upstream and downstream. The effects upstream are smaller and the effects downstream are larger.

Research on prediction method of driver's lane changing behavior based on simulated driving

2021 ◽  
Author(s):  
junzhe lu ◽  
jiangtian li ◽  
jie feng ◽  
pengxu huang ◽  
wei wang
Keyword(s):  
Prediction Method ◽  
Lane Changing ◽  
Simulated Driving ◽  
Behavior Based

scholarly journals Proximal bodies in hypersonic flow

2007 ◽  
Vol 590 ◽  
pp. 209-237 ◽  
Author(s):  
STUART J. LAURENCE ◽  
R. DEITERDING ◽  
G. HORNUNG
Keyword(s):  
Numerical Simulations ◽  
Force Measurement ◽  
Lateral Displacement ◽  
Relative Size ◽  
Lateral Force ◽  
Three Dimensions ◽  
Experimental Simulation ◽  
Force Coefficient ◽  
Primary Body ◽  
Two Bodies

Hypersonic flows involving two or more bodies travelling in close proximity to one another are encountered in several important situations. The present work seeks to explore one aspect of the resulting flow problem by investigating the forces experienced by a secondary body when it is within the domain of influence of a primary body travelling at hypersonic speeds.An analytical methodology based on the blast wave analogy is developed and used to predict the secondary force coefficients for simple geometries in both two and three dimensions. When the secondary body is entirely inside the primary shocked region, the nature of the lateral force coefficient is found to depend strongly on the relative size of the two bodies. For two spheres, the methodology predicts that the secondary body will experience an exclusively attractive lateral force if the secondary diameter is larger than one-sixth of the primary diameter. The analytical results are compared with those from numerical simulations and reasonable agreement is observed if an appropriate normalization for the relative lateral displacement of the two bodies is used.Results from a series of experiments in the T5 hypervelocity shock tunnel are also presented and compared with perfect-gas numerical simulations, with good agreement. A new force-measurement technique for short-duration hypersonic facilities, enabling the experimental simulation of the proximal bodies problem, is described. This technique provides two independent means of measurement, and the agreement observed between the two gives a further degree of confidence in the results obtained.

Wind Loading on Articulated Trailers During Tipping

1995 ◽  
Vol 209 (2) ◽  
pp. 103-110
Author(s):  
H Fessler ◽  
T H Hyde ◽  
W Sun
Keyword(s):  
Reynolds Number ◽  
Lateral Force ◽  
The Body ◽  
Scale Model ◽  
Wind Loading ◽  
Wind Force ◽  
Force Coefficient ◽  
Side Force ◽  
Side Force Coefficient ◽  
Lateral Area

Modern articulated trucks have very large trailers, up to 11 m long. When they empty their load, the body may be inclined at up to 40° this causes a high obstruction to sideways winds, which may cause the vehicle to roll over. The lateral force and the roll-over moment were measured in wind tunnel tests of a 1/60 scale model of a typical truck with the body at different tipping angles, ψ, and the wind in different directions, α. The side force coefficient was found to be approximately 1.5, almost independent of ψ, α up to 15° and Reynolds number up to 340000. The resultant of the wind force was found to act at almost the same height above the ground as the centroid of the lateral area for all values of ψ.

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