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The Aim of this project is to design a frame and a cover for a prototype Formula Student car. Following the championship rules, all the parameters that influence on the design will be controlled trying to get the lighter, toughness and economic car design, but keeping an eye on the execution time. It is necessary to know when it is possible to validate the design of a frame. Then it is very interesting to know the criteria that the car designers use on different competitions. Knowing the aim to achieve, choosing a suitable design tool is very important. The tool chosen will be the Finite Elements Theory. We will use design software, Solid Works. It is a very useful tool because let us to design and check the designs. Currently there is no a specific rules or regulations for a tubular frame design. While for the building construction we can find a lot of regulations, designing the frame that we are studying there is only specific competitions that give preliminary ways of design, just to guarantee minimums of safety. In our case we will follow the FORMULA SAE rules.
In most forms of racing, cornering speed is the key to winning. On the street, precise and predictable handling is the key to high performance driving. However, the art and science of engineering a chassis can be difficult to comprehend, let alone apply. Chassis Engineering explains the complex principles of suspension geometry and chassis design in terms the novice can easily understand and apply to any project. Hundreds of photos and illustrations illustrate what it takes to design, build, and tune the ultimate chassis for maximum cornering power on and off the track.
Vehicle dynamics has evolved into an increasingly indispensible discipline to supplement the design of automobiles, especially racecars. Every single component of the car and the environment with which it interacts contributes to the overall dynamic behavior of the vehicle. For Formula Society of Automotive Engineers (FSAE) cars in particular, these parameters become extremely critical and hence require robust and accurate physical testing methods, which are expensive and time consuming, warranting the need for virtual testing methods. The Bearcat Motorsports team (BCMS) lacked this capability of predicting vehicle dynamic behavior, relying on previously available test data and the performance of the car after fabrication. Hence, a thorough multi-body dynamics model has been developed to overcome this inadequacy. The 2013 race car is used for this study and ADAMS/Car is used as a multi-body development platform. ADAMS/Car multi-body model consists of different automotive subassemblies modeled as independent subsystems, which can interact amongst themselves to mimic the overall dynamics of a physical car model. Each subsystem requires data pertaining to its characteristics such as mass, inertia, center of gravity, which can be tuned to calibrate and eventually validate the model against data obtained from physical testing. This makes it imperative to bring together the work done by all sub-system teams over the course of the year. For simulation of road-tire interface, the PAC2002 tire model [2] is used, which is the latest Pacejka Tire Model. A new ADAMS template is made for the anti-roll bars and the strut structure. The model can predict full vehicle dynamic behavior apart from generating sub-system specific vehicle dynamic parameters. The validation of a full vehicle model is a multi-year project and is not within the scope of this thesis. However, the initial dynamic model is now able to help the team predict vehicle dynamic trends and evolve their designs based on previous design ideologies. The future work for this project will include further calibration and validation of the model and then running the simulation model on a complete virtual endurance track.
Hand-selected by racing engineer legend Carroll Smith, the 28 SAE Technical Papers in this book focus on the chassis and suspension design of pure racing cars, an area that has traditionally been - farmed out - to independent designers or firms since the early 1970s. Smith believed that any discussion of vehicle dynamics must begin with a basic understanding of the pneumatic tire, the focus of the first chapter. The racing tire connects the racing car to the track surface by only the footprints of its four tires. Through the tires, the driver receives most of the sensory information needed to maintain or regain control of the race car at high force levels. The second chapter, focusing on suspension design, is an introduction to this complex and fascinating subject. Topics covered include chassis stiffness and flexibility, suspension tuning on the cornering of a Winston Cup race car, suspension kinematics, and vehicle dynamics of road racing cars. Chapter 3 addresses the design of the racing chassis design and how aerodynamics affect the chassis, and the final chapter on materials brings out the fact that the modern racing car utilizes carbon construction to the maximum extent allowed by regulations. These technical papers, written between 1971 and 2003, offer what Smith believed to be the best and most practical nuggets of racing chassis and suspension design information.