IJSTE - International Journal of Science Technology & Engineering | Volume 2 | Issue 01 | July 2015 ISSN (online): 2349-784X All rights reserved by www.ijste.org 104 Design and Modeling of Multibody Dynamics of Light Motor Vehicle Samrat S. Shende Dr. S. K. Choudhary Department of Mechanical Engineering Professor K.D.K.C.E. Nagpur, India Department of Mechanical Engineering K.D.K.C.E. Nagpur, India A. P. Ninawe Assistant Professor Department of Mechanical Engineering K.D.K.C.E. Nagpur, India Abstract This paper presents the design and modelling of multibody dynamics of light motor vehicle with the related search. The study specifies factors influencing the motion of light motor vehicle. These are based on a systematic study of dynamic forces acting on the vehicle body and analysis of stresses acting on it. Keywords: Tata Sumo, Light Motor Vehicle, Modelling, Dynamic Analysis ________________________________________________________________________________________________________ I. INTRODUCTION Multi-body dynamic analysis is the dynamic analysis of mutually interconnected rigid bodies, whose relative motions are constrained by means of joints. The purpose of this analysis is to find out how these bodies move as system and what forces are generated in the process. The multi-body dynamic analysis is typically applied in automobile industry for the modelling and analysis of suspension system. The multi-body suspension models allow precise evaluation of the effect of suspension geometry and the mechanical characteristics of spring and damper on the ride comfort and vehicle handling performance. In the automotive industry, computer simulations of Light Motor Vehicle durability early on in the design process are becoming more and more important in order to decrease development cost and product time to market. Accurate calculations of force histories are of utmost importance for reliable fatigue life estimates. The forces are often calculated by use of multi-body software and used as input for stress analysis in a FEA package. As the project is being done in collaboration with TATA MOTORS, the Dynamic Analysis is carried on TATA SUMO. II. LITERATURE REVIEW [1] This paper gives information about accurate calculations of force histories for reliable fatigue life estimates. The forces are often calculated by use of multi-body software and used as input for stress analysis in a FE package. The calculated forces are compared with measurements for different road inputs. One type of analysis that is growing in importance is the simulation of forces for durability assessment. However, most (all) methods use multi-body simulation (MBS) codes to perform the calculation of the forces. For truck simulations it is vital to have a flexible representation of the frame.The objective of this study has been to find a more efficient method for the calculation of forces, which allows for fast analysis and easy implementation of flexible bodies. [2] In this paper, electronic stability control functions are applied on trucks to enhance safety. The challenge of designing such functions is to guarantee robustness for all truck variations, such as lay-out, length, mass, number of axles and number of articulations. Therefore, fundamental understanding of the effect of these variations on the dynamic yaw behaviour of articulated vehicles is required. The results presented in this report pertain to optimal driving conditions. It is recommended to investigate the effect of excitations of the truck other than the steering wheel input on the dynamic performance of truck combinations. [3] This paper describes a designing and analysis of earth mover – wheel loader vehicle using SolidWorks 2009 and MSC Visual Nastran Desktop 4D. Wheel loader vehicle is a multi body system and to design and analyze such system requires profound knowledge of highly challenging subjects like Computer Aided Design, Finite Element Analysis, machine design,reverse engineering and structural dynamics etc. This project work shows how to implement engineering fundaments into the real world application. In this project, designing has been done by implementing reverse engineering concept. Initially, the dimensions of wheel loader toy have been documented by vernier caliper and full scale ruler. [5] There are some specific tasks which are to be performed only at the site. For the accomplishment of such tasks heavy machines are employed. When such heavy mechanisms are moved, dynamic forces are induced into the system during