http://www.iaeme.com/IJCIET/index.asp 395 editor@iaeme.com International Journal of Civil Engineering and Technology (IJCIET) Volume 8, Issue 10, October 2017, pp. 395–404, Article ID: IJCIET_08_10_041 Available online at http://http://www.iaeme.com/ijciet/issues.asp?JType=IJCIET&VType=8&IType=10 ISSN Print: 0976-6308 and ISSN Online: 0976-6316 © IAEME Publication Scopus Indexed DESIGN AND ANALYSIS OF DAMPER SPRING AND ITS STRUCTURAL COMPONENTS C. Rajkumar, S. Jayavelu, R. Ramesh Kumar Department of Mechanical Engineering, Vel Tech University, Avadi, Chennai, India, Tamilnadu, India ABSTRACT The main functions of automobile suspension systems are to isolate the structure and the occupants from shocks and vibrations generated by the road surface. The suspension systems basically consist of all the elements that provide the connection between the tyres and the vehicle body. A spring is an elastic object used to store mechanical energy. It is an elastic body that can be twisted, pulled, or stretched by some force. It can return to their original shape when the force is released. It is a flexible element used to exert a force or a torque and, at the same time, to store energy. The force can be a linear push or pull, or it can be radial, acting similarly to a rubber band around a roll of drawings. The torque can be used to cause a rotation. The design of spring in suspension system is very important. In this project a shock absorber is designed and a 3D model is created using CATIA V5. The model is also changed by changing the coil radius of the spring. Structural analysis and optimization are done in ANSYS 11.0 of the shock absorber by varying coil radius and spring radius. The analysis is done by considering loads, bike weight, and single person. Structural analysis is done to validate the strength and optimization is done to determine the better dimension of spring to carry applied load. Optimization is done for different dimensions to verify best size for spring in Shock absorber. Key words: Damper Spring, Suspension Systems, Catia V5, Ansys, Optimization, Adams. Cite this Article: C. Rajkumar, S. Jayavelu and R. Ramesh Kumar, Design and Analysis of Damper Spring and its Structural Components. International Journal of Civil Engineering and Technology, 8(10), 2017, pp. 395–404. http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=8&IType=10 1. INTRODUCTION Suspension systems have been widely applied to vehicles, from the horse-drawn carriage with flexible leaf springs fixed in the four corners, to the modern automobile with complex control algorithms. The suspension of a road vehicle is usually designed with two objectives; to isolate the vehicle body from road irregularities and to maintain contact of the wheels with the roadway. Isolation is achieved by the use of springs and dampers and by rubber mountings at the connections of the individual suspension components. From a system design point of