Design and analysis of an atv suspension system ashish sangave and chaitanya aurangabadkar department of mechanical engineering, marathwada mitra mandals college of engineering, karvenagar, pune, maharashtra, india accepted 02 feb 2017, available online 12 feb 2017, vol. Analytical calculation method for the preliminary analysis of. Evaluate designs and select the three best candidates. Special attention on aspects other than mathematical calculations should be given. Motorcycle rear suspension worcester polytechnic institute. The stiffening girder of selfanchored suspension bridge ssb is subjected to huge axial force because the main cable is directly anchored on the end of the stiffening girder. To obtain a simple model and accurately understand the mechanical behavior of the whole structure in preliminary design, this paper proposed an analytical calculation method considering the combined effects of the main. Then with the help of it we set the dimensions for the spring. This summary will assume that the user has a basic working knowledge of suspension dynamics and will attempt to distil the most valuable knowledge gained over the past four years of design, testing, and competition.
Pdf design analysis of double wishbone suspension editor. The rear frame that holds the powertrain, drivetrain and suspension will be shortened to reduce total mass and yaw inertia of the car. Pdf suspension system is one of the challenging portions in designing a vehicle. The design incorporates independent motors for each wheel. Table of contents download pdf acknowledgements references.
There are no springs or axles, making the design simpler and more reliable. Synthesis lectures on advances in automotive technology. For designing purpose, use of basic hand calculations and research of design parameters referring design reports which are paper published. Damper design, testing and tuning kaz technologies. Development and analysis of a multilink suspension for. A more modern implementation is the parabolic leaf spring. There will be different terms that mean essentially the same thing, but suspension design is suspension design, and if you start from the basic mechanics equations, there are no d. Parker 29 figure 21 dualspring motorcycle suspension system design. Pdf design and analysis of the double wishbone suspension. Since the suspension we are about to design is used for formula1 cars, out of many suspensions, we choose double wishbone suspension system. Redesign of an fsae race cars steering and suspension system. The main subject of this report is the design of a springdamper system for the ure06. First based on the ride rate, wheel rate and motion ratio we calculate the spring rate. Pdf design and calculation of double arm suspension of a car.
The design of front and rear suspension of a vehicle may be different. We have data for calculation for existin g design of su. The results shows that the stress value obtained from numerical simulations in adams was verified with analytical design calculations for the spring and the research article open access worked on optimum design of steel helical spring related to light vehicle suspension system under the effect of a uniform loading has been studied and finite. Design and calculation of double arm suspension of a car jve. The suspension dynamics overview is intended to address the vehicle dynamics unique to an sae baja car. Design, analysis and optimization of suspension system for an. Workout the parameters by analysis, design, and optimization of. The suspension system is a device connecting the body with wheels.
Design and analysis of front suspension of three wheeler. Design and analysis of a pushrod suspension system for a formula racing car karthik. Index excessive local stress can result from too small spring index. Exactly the same way as you would design a cars suspension system. This paper deals with effect of impeller type on offbottom particle suspension. The rear suspension can almost be identical, but with a fixed toe link. In this design, interleaf friction is unwanted, and therefore there is. Figure vii isometric view of assembly diagram of the whole frame 5. All kinds of forces and movements between the wheels and the ground passes to the body through the suspension.
This model consists of a tire, suspension components knuckle, low arm, and shock absorber, and steering components tie rod and rack bar. In spring design calculations, the following points should also be taken into account. A suspension is two springmassdamper systems in series body, chassis spring and damper. Machinability is compromised if the spring index is too great or small. The main objective of this document is to provide complete guidance in designing and calculation of an.
This paper is an introduction to the design of suspension components for a formula sae car. Proper suspension design damping force calculations damper fit check handling the care and feeding of your dampers a shock absorber is a damper a shock absorber damps the motion of both the sprung and unsprung masses of the car. Formula sae interchangeable independent rear suspension design. Double wishbone suspension system it is popular as front suspension mostly used in rear wheel drive vehicles.
An isometric view of total frame after assembly is shown below. Formula sae is a student competition where college students conceive, design, fabricate, and compete with a small formulastyle open wheel racing car. Design, analysis, simulation and validation of suspension system. Design of a formula student race car springdamper system. On the basis of numerous suspension measurements there were proposed correlations for calculation justsuspended impeller speed of eleven impeller types and geometries in the wide range of concentrations and particle diameters. Dynamic longitudinal acceleration and hard braking resulting in.
Redesign of an fsae race cars steering and suspension. The design and calculations carried out is based on a prototype vehicle of mass 350 kg. Design of suspension system for formula student race car. Finally, the design and analysis of a suspension mechanism along with its major parts are explained. Additionally, concepts in the way of 3d models have been established for the suspension and. The paper focuses on design of rear suspension system for an atv. Structural design requires a full understanding and knowledge of all the components comprising the structure. Simplified numerical analysis of suspension bridges. Suspension system upper and lower arm mounting point calculation. However, the large number of variables involved do not normally allow examination of the influence of different parameters on the behavior of suspension bridges. Both explicit equilibrium and tangent stiffness ma. Geometric design of independent suspension linkages deep blue. Its advantage lies in the fact that there are no camber or toein changes, along with a constant track width. A new springdamper system has to be designed to make this possible.
How to design spring suspension system in bikes with. Completion of the project has seen the design of geometry for the suspension arms, suspension actuation mechanisms, uprights as well as the steering rack and arms. First order analysis for automotive suspension design. Design and manufacture of an adaptive suspension system. Abstract the paper explains design methodology and flow in a suspension is one of the most vital subsystems of an automobile. Force consideration staticforce due to gravity, reaction force in wheels. In general, these methods convert wheel position andor velocity requirements into algebraic equations where the vari ables are the coordinates of the joint or link. Suspension system provide comfort ride to the passengers.
Suspension system is one of the challenging portions in designing a vehicle. The results shows that the stress value obtained from numerical simulations in adams was verified with analytical design calculations for the spring and the research article open access worked on optimum design of steel helical spring related to light vehicle suspension system under the effect of a. How to decide the upper and lower arm mounting position. The suspension also protects the vehicle itself and mounted systems from damage and wear. Designing a series of suspension chapter footbridges.
The springs were designed by calculations and the components were designed using catia. Hence in this course we shall focus on the double wishbone suspension design. Design expectations the suspension is designed so as to satisfy following design criterion. The complete stability of the vehicle under dynamic conditions. Design, analysis and fabrication of rear suspension system. Pdf suspension system is the necessary part in the automobile vehicle. Study and design of advance suspension system for two wheeler. Suspension system of a vehicle is interlinked with other systems such as steering, wheels and brakes. In the render toolbar menu, click the layer settings. Lister storm lmp designer reveals his trade secrets for suspension design.
Based on the properties of the selected material, the allowable. Our independent rear suspension design includes an unequal length aarm configuration, new rear uprights, spindles and hubs, a torsen differential, and an additional steel space frame to connect all of the listed components to the cp08 chassis. Adjustable pushrod suspension design andrew bayer 1 abstract the caterham is a type of car used mostly for everyday driving, but also for occasional trips to the racetrack. Determine suspension system requirements and specifications. S1, krupa r2, smruti rekha sen3 student1, assistant professor2,assistant professor3 nitte meenakshi institute of technology abstract this paper is an introduction to the design, analysis, and fabrication of a pushrod suspension for use in the formula hybrid.
A thorough analysis of 2004 usq racer car has been included in order to. Design, analysis and optimization of suspension system for. Keywords formula student, suspension design, analysis, catia v5, multibody dynamics. Introduction in automobiles, a double wishbone or upper and lower aarm suspension is an independent suspension design using two occasionally parallel wishboneshaped arms to locate the wheel.
Steering system and suspension design for 2005 formula saea. Chassis and suspension design fsrte02 what is materials. Technical data fc11 2 spring calculations excerpts from. The nature of the wheel movement path is very important to the handling of the car and is sensitive to the location of the. Race car design principles for baja and fsae teams suspension links presented by vivek bardia 1 what is a well. Two nonlinear equations solved for positions described. Introduction in automobiles, a double wishbone or upper and lower aarm suspension is an independent suspension design using two occasionally parallel wishboneshaped arms.
Layers 1 to 6 indicate each components of the suspension system, and layer 7 indicates the joint and. Major suspension elements like springs, shock absorbers, and the antirollbar are introduced. Apr 30, 2015 design and manufacture of an adaptive suspension system a major qualifying project report submitted to the faculty of worcester polytechnic institute this report represents the work of wpi undergraduate students submitted to the faculty as evidence of completion of a degree requirement. Design of a suspension system and determining suspension. Cullinan 30 figure 22 dualsprings in a motorcycle suspension system. Design of atype lower suspension arm design of lsa is the preliminary step to design the suspension system. Caterham sv suspension overview presentation overview project scope project targets suspension design measurement and modeling of existing vehicle new suspension target setting and optimisation kinematic analysis new design modeling and detail component design suspension development initial suspension setup calculations dynamic analysis including. Design and development of a new suspension system for the.
In this way, the design engineer can analyze the effect of each specific member on the entire suspension. Service, a basic design concept and a simple system of components for making these bridges figures 1. Research literature describes techniques for the design, construction of magnetic suspension system. The suspension components covered in this paper include control arms, uprights.
The simple 1d model has a sprung mass, which is nothing but the vehicle which is supported by a suspension placed between the vehicle and the ground. This requires a suspension design that is both road friendly but also able to give the handling characteristics needed for track use. Particles particleswhose surfacepropertiesare suchthatthey aggregateupon contact thus, changingin size, shape, andperhaps specificgravitywith. The upper arm is usually shorter to induce negative. Steering system and suspension design for 2005 formula. Analytical calculation method for the preliminary analysis. The paper focuses on the designing, analysis and simulation of an atv suspension system which was designed for a national level event namely baja saeindia. After design completion of frame and swing arm separately, assembly was performed by combining both the frame and the swing arm. By using hand calculations, best coil size was finalized for front suspension spring which will balance both ride comfort and handling characteristic of the vehicle. Design, analysis and fabrication of rear suspension system for an all terrain vehicle aniketthosar abstractall terrain vehicle atv is defined by ansi as a vehicle that travels on low pressure tires, which is used to handle any kind of terrain it faces. Design of cable systems for cable suspended bridges. The suspension stiffness of the fsrte02 will have a natural frequency of 2. Finally, the design engineer can manipulate the object of design specialized in a specific member to incorporate that object into the top layer, i.
The sprung mass is the body and chassis of the car, and everything supported by the springs. This paper presents a numerical method of analysis of suspended cables under vertical loads. Design of the geometry of double wishbone suspension system along with design of spring plays a very important role in maintaining the stability of the vehicle. This design is characterised by fewer leaves whose thickness varies from centre to ends following a parabolic curve. Sae technical paper series 20020310 design of formula sae suspension. The vehicle characteristics are validated with a dynamic vehicle model. Characteristicsof theparticles concentrationof particlesin suspension discrete flocculating dilute suspensions concentrated particles particleswhose size, shapeand specificgravity do not change withtime. The main element of a cable suspended bridge is the cable system. Pdf design and analysis of a suspension coil spring for. Double wishbone, suspension system, ansys, durability, optimization, handling. Study and design of advance suspension system for two. Design and optimization of formula sae suspension system. Calculation principles when selecting axlebox bearings, in addition to the bearing rating life calculation, other. Because of the remoteness of the bridge sites and the dif.
Jun 08, 2017 iii design calculations basic calculation gross vehicle weight 2250 kg 2250 x 9. Design, analysis and optimization of suspension system for an off road car. Figure 19 unique suspension design on yamaha ow61 gp racer foale, 125 28 figure 20 parker motorcycle suspension system design. Suspension is the term given to the system comprise of springs, shock absorbers and linkages that connects a vehicle to its wheels. It provides a less ride height which is an essential feature for a. Initially, the material is selected using pughs concept of optimization. Suspension system upper and lower arm mounting point. The front suspension and rear suspension of a vehicle can be different as per the application requirements. There are 10 key factors to be considered when designing a suspension system, whether its for a single seater or sports prototype, and part of the skill of the designer lies in reconciling the conflicts between them. In terms of manufacturing coilover shock absorbers, the calculation of coil diameters ratio is also performed 6. The driver feedback is improved by means of the suspension kinematics and steering wheel forces.
Double wishbone suspension the double wishbone suspension has been universally adopted throughout racing. The following formula can be used to calculate actual. Depending on the individual specification requirements and experience, the most suitable package of calculations has to be selected to provide a design that is both reliable and safe. This video explain the complete procedure of deciding the mounting point. Introduction this paper describes the summary of the design of suspension system of the vehicle complying with the rules and regulations of student formula. The below are the following reasons for which double wishbone suspension system is selected. Here in this design a perfect camber gain is achieved providing a balance between braking grip and cornering grip. Design, analysis and optimization of front suspension. Design and calculation of double arm suspension of a car. There will also be a section that presents advanced, active, and semi active suspension systems.
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