Ride comfort uncertainty analysis and reliability design of a passenger vehicle undergoing random road excitation

Kim, Bum Seok; Yoo, Hong Hee

doi:10.1177/0954407012458754

Cited by 9 publications

(4 citation statements)

References 17 publications

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“…Since ride comfort is deter-mined by road roughness and vehicle properties, the uncertainty of ride comfort results from the uncertainties of road roughness and vehicle property data. based on that , a statistical method employing the first order sensitivity information is used to evaluate the ride comfort uncertainty [6]. In the reference [7], the human body is considered as lumped masses, which represent the different body segments and are interconnected by springs and dampers and a human biodynamic model with dynamic seat characteristics is necessary in order to perform true comfort analysis.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response of the full-scale Straddle-type Monorail Vehicles with Single-axle Bogies

junchao¹

2019

mech

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Section: Introductionmentioning

confidence: 99%

Dynamic Response of the full-scale Straddle-type Monorail Vehicles with Single-axle Bogies

junchao¹

2019

mech

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“…Suspension systems are strongly related to the vehicle ride dynamics, 12 that is, ride comfort and safety. The effect of the conceptual suspension on the vehicle ride dynamics should be investigated.…”

Section: Introductionmentioning

confidence: 99%

Concept design and dynamics analysis of a novel lightweight vehicle suspension combined with driving units

Wang

Beeh

Zhou

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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A lightweighted suspension concept with integrated driving units into the longitudinal arm is proposed, to meet the increasing requirements from environments on both lightweight and propulsion to electric vehicles. This paper focuses on the structure concept design and ride dynamic analysis of the suspension with combined driving units. Besides conventional springs and shock absorbers, this concept suspension consists of a mass reduced axle structure, longitudinal arms, and electric driving units. The electric driving unit of the concept suspension arm is introduced by structural illustration first which in structure integrates the function as the suspension longitudinal arm and the function of electric propulsion to the vehicle. Meanwhile, a light brace structure with tube profiles is developed on the basis of topological optimization. Through the structure optimization, it can fulfill the suspension kinematic and compliance as well as mechanical requirements. The vehicle suspension realizes mass reduction not only from integration of driving units and suspension arm but also from structure optimization. In order to investigate the ride dynamics of the conceptual suspension, an analytical model for vehicle rear axle with a double lane road signal in accordance with International Organization for Standardization road surface profile is derived, with consideration of the integrated electric motor and linkage geometry. Simulation results are obtained to illustrate the ride dynamics in contrast to a conventional suspension benchmark. The simulation results indicate that the concept suspension has comparable ride dynamics performance as the reference suspension. Finally, the influences of the important parameters on ride dynamics are analyzed.

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“…Vehicle ride comfort is one of the important performance parameters determining the desirability and marketability of an automobile. The ride comfort analysis and prediction is an active research area; there has been considerable work (for example, see the literature 7–14 ) towards understanding ride comfort in terms of vibration perception, road inputs, dynamic behaviour of vehicle suspension components and also the human body dynamics. The aim has been to develop reliable virtual prototypes so as to reduce reliance of expensive physical prototype trials.…”

Section: Introductionmentioning

confidence: 99%

Experimentally validated dynamic results of a relaxation-type quarter car suspension with an adjustable damper

Thite

Coleman

Doody

et al. 2017

Journal of Low Frequency Noise, Vibration and Active Control

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Models of varying degree of sophistication are used in vehicle dynamic studies. For ride comfort, Kelvin–Voigt arrangement is preferred and for impact harshness analysis, a relaxation-type suspension model, Zener or Maxwell type is used. The nonconsideration of relaxation-type models in ride comfort studies can result in significant errors for frequencies below ∼30 Hz. The object of the paper is to show the influence of the series stiffness on the effective suspension damping both experimentally and numerically. A frequency domain analysis of two-degree of freedom Zener quarter car model is performed to find the complex relation between effective damping coefficient and the limiting value of damping ratio for a given series stiffness. The nonlinear relation between shock absorber damping and the natural frequencies is clearly illustrated. A novel four-post rig set-up is used to validate the results by measuring transmissibilities, giving damping ratios for varying shock absorber settings. A closed form solution, based on a simplified partial model, of optimal damping coefficient, which is a nonlinear function of stiffnesses, shows good agreement with numerical simulations of the complete system. The nonlinearities in shock absorbers also influence the outcome. These findings can be a great value at early design stage.

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Ride comfort uncertainty analysis and reliability design of a passenger vehicle undergoing random road excitation

Cited by 9 publications

References 17 publications

Dynamic Response of the full-scale Straddle-type Monorail Vehicles with Single-axle Bogies

Dynamic Response of the full-scale Straddle-type Monorail Vehicles with Single-axle Bogies

Concept design and dynamics analysis of a novel lightweight vehicle suspension combined with driving units

Experimentally validated dynamic results of a relaxation-type quarter car suspension with an adjustable damper

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