Global Journal of Researches in Engineering, A: Mechanical & Mechanics, Volume 22 Issue 1

25 cm Dia 12 cm 25 cm height= 3 cm Figure 3: Cat-eye hump configuration The same equations of circular hump can be applied with a cat-eye hump. It can be assumed that 6 columns of the cat-eyes are distributed with 25 cm intervals. Thus, the total distance is about 1.5 m. Table 2 below shows all types of humps with their specifications.[33] Table 2: Circular, trapezoidal, and cat-eye humps specifications d) Passive Suspension System Fig. 5 shows the configuration of the passive suspension system when the vehicle is travelling over a hump. The equations of motion can be expressed as follow: Figure 4: Free body diagram of passive system Parameters / Type of Humps Circular Hump Cat-Eye Hump Trapezoidal Hump Maximum height (cm) 10.76 3.0 10 Length (m) 3.6 - 6.33 Arc radius (m) 15.11 0.075 - Triangle length (m) - - 1.58 Top cat-eye diameter (cm) - 12 - Cat-eye horizontal interval (cm) - 25 - Vibrational Behaviour of a Quarter Car Travelling over Road Humps with Different Suspension Systems © 2022 Global Journals Global Journal of Researches in Engineering (A ) Volume XxXII Issue I Version I 50 Year 2022