study the effect of depending the non – linear factors of suspension systems of a truck vehicle on determine the location of driver seat
Article Sidebar
Main Article Content
Abstract
Abstract
Passenger comfort has become an important requirement for manufactures to achieve because of the direct effect on its seals rate the driver has been concentrate on this study to decrease the vibration that reach on him that cause unclear of his vision when driving and to achieve this goal a tow – dimensional model has been chosen to represent suspension system of halve truck vehicle for fore degree of freedom (4DOF) and by add one degree of driver seat .
In this study and to obtain accurate result we study the Non – Linear factors that act on the suspension system performance Taking into account one of the most important sources of nonlinearity, which is the non-linear behavior of the damper and the second source is the extended contact of the tire .
By considering the body of the vehicle is rigid The equations of the movement were derived using Newton's second law and excitement the car by using two types of obstacles , the first is halve sine wave and the second is trapezoidal as an expression of the road irregularity that the car is exposed through traveling and to obtain the results a Fortran 90 computer program was created for the purpose of solving mathematical equations. After running the program we obtain the results represented by displacement , velocity and the normal acceleration in the center of gravity of cars body .
The results were compared with the results of newly published research adopted The nonlinear behavior of the suspension systems and it was found that is approaches by acceptable degree and to find out the extent of improvement in the results when considering the nonlinear factors we compare with the linear symbol of same vehicle and by use same excitation It was found that the adoption of nonlinear factors leads to improved results .
Then we carried out to ride comfort To know what results we have achieved when adopting the nonlinear factors Through the adoption comfort criteria the first was the amount of maximum acceleration of the driver's seat and the second is the amount of Absorbed Power then its found that depending the Non – Linear factors give more flexibility to determining the ride seat connect with respect to center of gravity of car body with determination the optimum place to connect it that leads to obtain minimum percentage of vibration .
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
Tikrit Journal of Pure Science is licensed under the Creative Commons Attribution 4.0 International License, which allows users to copy, create extracts, abstracts, and new works from the article, alter and revise the article, and make commercial use of the article (including reuse and/or resale of the article by commercial entities), provided the user gives appropriate credit (with a link to the formal publication through the relevant DOI), provides a link to the license, indicates if changes were made, and the licensor is not represented as endorsing the use made of the work. The authors hold the copyright for their published work on the Tikrit J. Pure Sci. website, while Tikrit J. Pure Sci. is responsible for appreciate citation of their work, which is released under CC-BY-4.0, enabling the unrestricted use, distribution, and reproduction of an article in any medium, provided that the original work is properly cited.
References
[1] L. E. Vermeulin “Design of stroke dependent
damper for the front axle suspension of a truck using
Multibody system Dynamics and Numerical
Optimization” Dynamics System Vol.30, N0.1,
Netherland P. P. 81-109 , 2002 .
[2] Brogioli , Gobbi “sensitivity analysis to
passenger seat mo el for ri e comfort” Experimental
Mechanism. VOL. 51 ISSN 0014 – 4851 P.P.1239 -
1247 Oct. 2011 . (Iraqi Virtual Library) .
[3]–Florin Andronic, Ioan Mihal ""Simulating
Passive suspension on an uneven track Surface ""
Journal of Engineering Studies and Research ,
,Romania P.P. 7-16 VOL.20, 2014 .
[4] Mahmoud Al-Kafafy and Samir M. Al-
Demerdash “Automotive ride comfort control using
MR fluid” Scientific Research , Engineering 2012 ,4,
Egypt (Iraqi Virtual Library) P.P. 179-187 Feb. 2012.
[5] Yogesh Sanjay Pathare “Design an
development of quarter car suspension test Rig Model
and its simulation "International Journal of
Engineering Science and Advance Technology,
VOL.-3 ,ISSUE -3,P.P.153-170, India, 2014 .
[6] Aberdeen Proving Ground “Ride dynamics and
evaluation of human exposer to whole-body vibration
“ Test Operation Proce ure 01-1-014A USA Army
test and evaluation command P. P. 18-39, 29-
novamber 2012.
[7] Salim Y. Kasim “Ride analysis for suspension
system of off-road tracked vehicle” Ph.D. thesis.
School of Mechanical Engineering Turbomationary
and Engineering Mechanics Department. Cranfield
Institute of Technology Gen . 1991 .
[8] Richard Stone and Jeffrey K. Ball “Automotive
engineering Fundamentals” SAE International , PA
15096 – 0001 ISBN 0-7680-0987- USA . Autumn
2002 .
[9] Zahib Hussain and Nurul-Absar Khowdhury
“Ride comfort of 4-Degree of freedom non-linear
heavy vehicle suspension” ISESCO JORNAL of
Science and Technology VOL.8 Number 13 P.P. 80-
85 May 2012 .
[10] Kumber , Sawant and Tamboli “An overview
of disarray in non-linear active suspension system
under random road excitation with time delay”
International Journal of Modern Engineering
Research (IJMER), VOL.2 Issue.1 P.P.332-335,
India, Feb, 2012 .
[11] Randolph Anthony Jones “Validation study of
two rigid body dynamic computer model” Technical
Report GL-92-17 Under Project No. 1V665810DE65
Mississippi . USA , P.P 17-72 September 1992 .