International Journal of Advanced Technology in Engineering and Science www.ijates.com Volume No.02, Issue No. 09, September 2014 ISSN (online): 2348 – 7550 139 | Page DESIGN, MODELLING AND ANALYSIS FOR EXPERIMENTAL INVESTIGATION OF DOUBLE SPRING DAMPER SHOCK ABSORBER PERFORMANCE Vidhyadhar P.Kshirsagar 1 , Dilip G.Gangwani 2 , Somadatta B.Karanjekar 3 1, 2, 3 Mechanical department, Wainganga College of Engineering & Management, Nagpur(India) ABSTRACT This paper includes the design, modelling and analysis of conceptual hybrid double spring damper shock absorber. The function of all the components like piston valve, compression and rebound chamber and the flow analysis of the fluid through these valves are studied in detail by designing the double spring damper shock absorber using 3d software. The performance evolution of double spring damper shock absorber with experimental investigation using simulation and modelling. Damping characteristics of double spring damper shock absorber is analysed. The proposed hybrid model of the double spring damper shock absorber is considered as two modes of damping force according to the position of piston. For the simulation validation of vehicle-dynamic characteristics, the double spring damper shock absorber is mathematically modelled. And the vehicle dynamic characteristic of the double spring damper shock absorber is analysed using quarter car model. Keywords: 3D Software, Double Spring Damper Shock Absorber, Modelling, Simulation. I. INTRODUCTION A shock absorber is one of the components of the suspension of a car. It is designed to deflect vertical and lateral vibrations of the car in movement. It consists of a spring, which is designed to deflect the vertical vibrations and a hydraulic damper, to deflect lateral vibrations of a car [1]. The dampers employed in automotive suspension are designed to perform symmetric damping characteristics in compression and rebound in order to achieve a better compromise between rides, road-holding, cushion, and handling and control performance of the vehicle. Considerably higher wheel velocity in the upward direction, when compared to that in the downward direction, the dampers provides significantly higher damping force in rebound. The non-linear and asymmetric damping properties of shock absorbers have been mostly characterized in terms of peak force- peak velocity characteristics. A number of suspension models based upon fluid flows through damper and valves, the suspension characterize the asymmetric force–velocity characteristics. Since these models require prior knowledge of various coefficients to be derived from the measured data for a specific damper, their applications have been limited for analysis of vehicle ride and handling [2]. The spring stiffness, K, of the spring