Design And Analysis Of Two Wheeler Suspension System By FEA Approach

Abstract

The Suspension system is the most important part in any vehicle. It handles shock impulse and dissipates kinetic
energy. It reduces the amplitude of disturbances and improved ride quality. The spring is compressed quickly when the wheel
strikes the bump. The compressed spring rebound to its normal dimension when load is removed. The spring goes down
below its normal height when the weight of the vehicle pushes the spring down. This, in turn, causes the spring to rebound
again. The spring bouncing process occurs over and over every less each time, until the up-and-down movement finally
stops. The vehicle handling becomes very difficult and leads to uncomfortable ride when bouncing is allowed uncontrolled.
Hence, the designing of spring in a suspension system is very crucial. The present work is carried out on helical spring
where, modelling, analysis and testing of suspension spring is done to replace the existing design of helical spring used in
popular two wheeler vehicle. The different designs of springs are modelled by reducing the diameter of the existing spring.
The analysis is carried out by considering bike mass, loads, and no of persons seated on bike. The stress and deflections of
the helical spring are determined by using finite element analysis approach. The comparative study is carried out between
baseline spring and new design of spring by constant material. The results from finite element analysis are compared to the
experimental values. A typical two wheeler suspension spring (spring for Hero Splendor 125 cc) is selected for the
application. The solid model of spring is developed in CATIA and the analysis part is carried out in ANSYS.