Evaluation of Passenger Ride Comfort of Indian Rail and Road Vehicles with ISO 2631-1 Standards Part 2 - Simulation

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
R.C. Sharma
Keyword(s):  
Ride Comfort ◽  
Road Vehicles ◽  
Rail Vehicle ◽  
Normal Duration ◽  
Indian Railway ◽  
Iso 2631 ◽  
Comfortable Ride

In this paper ride comfort of Indian road and rail vehicle is evaluated using ISO 2631-1 comfort specifications. A three wheel vehicle, light four wheel vehicle and general sleeper ICF coach of Indian railway have been evaluated on the basis of 1 hr, 2.5 hrs, 4 hrs and 8 hrs ISO 2631 comfort specifications in seated position as these are the normal duration for passengers. An insight to comfortable ride duration for these vehicles is presented in this paper.

Evaluation of Passenger Ride Comfort of Indian Rail and Road Vehicles with ISO 2631-1 Standards Part 1 - Mathematical Modelling

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
R.C. Sharma
Keyword(s):  
Mathematical Modelling ◽  
Ride Comfort ◽  
Dominant Factor ◽  
Ride Quality ◽  
Passenger Vehicle ◽  
Performance Indices ◽  
Road Vehicles ◽  
Rail Vehicles ◽  
Indian Railway ◽  
Iso 2631

Ride quality and ride comfort are the most important performance indices of road or rail vehicles and is affected by various factors, such as vibrations, acoustics, smell, temperature, visual stimuli, humidity and seat design. Among these vibration is a dominant factor that influences the performance indices the most. In this work the coupled vertical-lateral mathematical models of Indian rail and road vehicles have been formulated using Lagrangian. The roadway vehicles considered for this analysis are three wheel and light four wheel Indian passenger vehicle. The rail vehicles considered for this analysis are General sleeper ICF coach of Indian railway.

Parametric Analysis of the Ride Comfort of Indian Railway Vehicle

2021 ◽  
Vol 13 (4) ◽  
Author(s):  
Rakesh Chandmal Sharma ◽  
Sono Bhardawaj ◽  
Mohd Avesh ◽  
Neeraj Sharma
Keyword(s):  
Mathematical Model ◽  
Parametric Analysis ◽  
Degrees Of Freedom ◽  
Ride Comfort ◽  
Rear Wheel ◽  
Railway Vehicle ◽  
Mass System ◽  
Rail Vehicle ◽  
Indian Railway ◽  
The Mathematical Model

This paper focuses to the parametric analysis of Indian Railway Rajdhani (LHB) coach. A suitable mathematical model of 40 degrees of freedom (DOF) is formulated by Lagrangian method. The mathematical model of rail-vehicle is modelled by considering eleven mass system containing of backseat support (without cushion), a seat, a car body, two (front and Rear) bolsters, two (front and Rear) bogie frame and four wheelaxles (front bogie front and rear wheel axles and rear bogie front and rear wheel axles. The vehicle is simulated to travel at speed of 100 km/hr on a tangent track. The results from the simulation are validated by comparing the same with the results from experimental data which is acquired from research designs and standards organization (RDSO), Lucknow (India). The parametric analysis is performed to estimate the effect of different parameters of rail-vehicle on the ride behaviour.

Research on Ride Comfort of Off-Road Vehicles

2011 ◽  
Vol 141 ◽  
pp. 601-604
Author(s):  
Jun Zhong Xia ◽  
Zong Po Ma ◽  
Shu Min Li ◽  
Xiang Bi An
Keyword(s):  
Ride Comfort ◽  
Road Vehicles ◽  
Absorbed Power ◽  
Iso 2631

This paper focuses on the ride comfort of off-road vehicles, which requires rising steadily. The objective methods for determining ride comfort including the Average Absorbed Power, BS 6841, VDI 2057 and ISO 2631 were investigated. Research shows that all the methods can be used to specify and evaluate ride comfort, but the Average Absorbed Power is more suitable for off-road vehicles. The solutions to improve ride comfort of off-road vehicles in suspension and seat were investigated too.

An extended model of the ISO-2631 standard to objectify the ride comfort in autonomous driving

Work ◽  
2021 ◽  
Vol 68 (s1) ◽  
pp. S37-S45
Author(s):  
Georg Burkhard ◽  
Tobias Berger ◽  
Erik Enders ◽  
Dieter Schramm
Keyword(s):  
Ride Comfort ◽  
Autonomous Driving ◽  
Extended Model ◽  
Measuring Point ◽  
Significant Difference ◽  
Comfort Perception ◽  
Simulator Study ◽  
Iso 2631

BACKGROUND: With the development of autonomous driving, the occupants’ comfort perception and their activities during the drive are becoming increasingly the focus of research. Especially in one of the first applications, a drive on a motorway, vertical dynamics play a major role. OBJECTIVE: To be able to robustly objectify ride comfort, better models need to be developed. Initial studies have shown, that the current ISO-2631 standard creates good results in the objectification and can be regarded as benchmark. METHODS: To increase the accuracy in objectification, an extended model with the occupants’ head as additional measuring point is introduced. Instead of the known frequency filters, weighting (k-factors) is used to differentiate possible excitations. For comparing the model with the ISO-2631, a simulator study with 5 excitations and 50 inattentive subjects is carried out. RESULTS: Evaluating the study with the ISO-2631, 3 out of 5 excitations indicate a significant difference between the occupant’s impression and the calculated comfort value. In comparison the extended model has no significant difference. CONCLUSION: The results further show, that inattentive occupants move their heads significantly more. By measuring accelerations of the head, the extended model creates equivalent or more accurate comfort values than the ISO-2631.

Rail vehicle ride comfort prediction based on bogie acceleration measurements

2013 ◽  
Author(s):  
Xiukun Wei ◽  
Yan Liu ◽  
Qu Sun ◽  
Limin Jia ◽  
Yuting Wang
Keyword(s):  
Ride Comfort ◽  
Rail Vehicle

Optimal Ride Comfort and Active Safety of Road Vehicles

2007 ◽  
pp. 121-158
Author(s):  
Giampiero Mastinu ◽  
Massimiliano Gobbi ◽  
Carlo Miano
Keyword(s):  
Ride Comfort ◽  
Active Safety ◽  
Road Vehicles

scholarly journals Assessment of a rail vehicle running with the damaged wheel on a ride comfort for passengers

2018 ◽  
Vol 157 ◽  
pp. 03004 ◽  
Author(s):  
Ján Dižo ◽  
Miroslav Blatnický ◽  
Stasys Steišūnas ◽  
Blanka Skočilasová
Keyword(s):  
Ride Comfort ◽  
Railway Wheel ◽  
Rail Vehicle ◽  
Rail Vehicles ◽  
Dynamic Analyses ◽  
Wheel Flat

In certain conditions rail vehicles wheels can be during operation damaged. Then, the profile of wheels is no longer circular, but it is changed depending on the type and severity of defects. When such rail vehicle with the damaged wheel operates, the quality of a ride comfort for passenger is degraded. This article is focused on the assessment of ride comfort for passenger based on results obtained from dynamic analyses. Simulations and calculations were carried out in commercial multibody software. In our research we considered one type of the railway wheel untrueness – wheel-flat. This type of wheel damaging is relatively common and has such influence on the ride comfort for passenger worsening, which needs to be detected and investigated.

Dynamic model for ride comfort evaluations of the rubber-tired light rail vehicle

2008 ◽  
Vol 46 (11) ◽  
pp. 1061-1082 ◽  
Author(s):  
Yeon-Su Kim ◽  
Tae-Keon Lim ◽  
Sung-Hyuk Park ◽  
Rag-Gyo Jeong
Keyword(s):  
Dynamic Model ◽  
Ride Comfort ◽  
Light Rail ◽  
Rail Vehicle
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