Performance Effects of Shock Absorber and Spiral Springs Against Vertical Vehicle Expenses Weighing the Road Structure

Simon Ka'Ka,Festo Andre H

doi:10.31963/intek.v7i1.2298

Abstract

This study aims to examine more about the effect of vertical dynamic load of vehicles and changes in dimensional barriers on the road surface in its path. Experimentally this fluctuating load is replaced by a pneumatic force change based on the regulation of air pressure on the regulator. The deviations generated by the varying load work are measured by placing a proximity sensor along the spring movement. The amount of vertical load transformation reaches the road surface is measured by using Load cell. Characteristics of vertical dynamic vibration occurring due to several dimensional barriers, U (cm) obtained using mathematical modeling method with 2 DOF suspension system transfer function. The results showed a condition on the body and wheels of vehicles experienced a brief overshot for 0.14 seconds with deviation of 0.178 m. From the graph shows that the rate of deviation that occurs is large enough that Y2d = 1.03 m / s caused by a sudden shock that occurred on the wheels of the vehicle. This condition does not last long that is only duration t = 0.22 s, because the spring reaction force and shock absorber can absorb 25% vibration against the sprung and un-sprung vertical load of the vehicle.

Highlights

The increasing volume of vehicles, especially fourwheel vehicles passing through roads, will decrease the ability of road structures to support vehicle vertical loads
The vehicle suspension system according to [1, 2] is composed of a spring and a shock absorber arranged in parallel
The shape and mechanism of the suspension system is shown in Fig. 1(a), with sprung mass (m2), un-sprung mass (m1), suspension spring (k2), shock absorbers (c) and tire elastic constants on wheels (k1), [6, 7]

Summary

Introduction

The increasing volume of vehicles, especially fourwheel vehicles passing through roads, will decrease the ability of road structures to support vehicle vertical loads. Vibrations originating from vertical dynamic loads of vehicles often fluctuate due to unstable drivers and passengers. Such conditions will further weaken the ability of the road structure to accept the fluctuating load. The spring and shock absorber mounted on each of the wheels of the vehicle is expected to be able to overcome and reduce the vertical dynamic load of vehicles overloading the road structure. The main function of the suspension system is to support the weight of the vehicle, to provide comfort for the rider, to keep traction of the wheel on the road surface condition, and to maintain the alignment of the front wheel and rear wheel [3,4,5]. The shape and mechanism of the suspension system is shown in Fig. 1(a), with sprung mass (m2), un-sprung mass (m1), suspension spring (k2), shock absorbers (c) and tire elastic constants on wheels (k1), [6, 7]

Objectives

Methods

Results

Conclusion