Design and Analysis of a Motorcycle Rear Suspension - Coursework Example

Student’s Name Instructor’s Name Course Name: Date: 9th February, 2015. Design & Analysis of a Motorcycle Rear Suspension Abstract For any motorcycle move well rear suspension should be designed and modeled so that the user can use less force and withstand all conditions. In this case Motorcycle Rear Suspension has been modeled using Adams software focusing on 120 mm rear wheel travel to allow adequate movement. The parts of the Motorcycle Rear Suspension has been using maximum 50mm, spring rate of 400N/mm and link length of 75mm, it has been tested by calculating velocity of spinning and angular acceleration. The technical aspects of design have been simplified to make easier for non-technical readers to understand the usage of the Motorcycle Rear Suspension. The designed Motorcycle Rear Suspension is not suitable for commercial but will be availed to the public with a few modifications are made. Introduction Motorcycle Rear Suspensions are very important in Motorcycle in assisting the user use less force. Motorcycle Rear Suspensions has been used for some years and as a result is not considered new inventions by any means. If Motorcycle Rear Suspensions are not properly designed, Motorcycle will not successively take place. This Motorcycle Rear Suspensions enables the Motorcycle move individual from one point to another. The Motorcycle Rear Suspensions capability will depend on properties of designing materials. It is important to consider having the knowledge concerning the simulation using Adams regarding the designing of parts of machines. The model has considered the relationship that does exist between signals like the parameter estimation, component analysis and parity equations. Furthermore, there are several examples that can be considered when it comes to modeling as well as the diagnosis of the Motorcycle Rear Suspension. The main factor which is extremely important is safety. This is because it involves human contact and if not given importance could be very risky. In the design of the system the dimensions of the Motorcycle Rear Suspension is significant. This paper is using Adam’s software to simulate the operations of a Motorcycle Rear Suspension by looking modeling with the aim of having a model that can be relied upon for motorcycle riders. Various methods of determining the reaction force has been employed because each Motorcycle Rear Suspension has different signals that emanate. Report Objectives & Questions The objectives of this project paper is to focus on opportunity to improve current practice thru available life data analysis and establishing economic modeling in Motorcycle Rear Suspension structures assembly as discussed earlier. In this study, parameters were observed and considered as constant parameters and Motorcycle Rear Suspension safety factor is predicted based on the existing brands in the market. Therefore, the research questions are developed accordingly; 1. What is the current Motorcycle Rear Suspension reliability? 2. What types of analysis do I need for Motorcycle Rear Suspension life wear out? 3. What will be the possible outcome to the solution? 4. Do I need a need economical tracking model for reliability? Based on research questions, the focus for research objectives will be to set a clear understanding to the project being studied for Motorcycle Rear Suspension. To answer the above research questions the following objectives need to review through literature: a) To synthesize existing body of knowledge. b) Understand the current Motorcycle Rear Suspension modeling. c) Develop an explanatory theories and application of reliability model. Results To determine the time the wheel takes stop from moving once begins to be in motion will depend the velocities applied and angular displacement. This is solved by the equation Where and is the beginning velocity and final velocity respectively, while is the angular displacement. Angular acceleration is determined by the change of the beginning velocity and final velocity and is written as =( )()() = x 2x () = 0.033 rad/s2 The acceleration of the wheel is 0.033 rad/s2 . it should noted that the wheel will have zero angular acceleration when the velocity is constant however this is not possible when we have one revolution. This written as a = 0 rad/s. In the analysis of the wheel speed and frequency accurate figures have been used to reduce errors. The drawing for the wheel has been labeled to provide the appearance of the wheel that is used by Motorcycle Rear Suspension. The internal structure of the bike gives an allowance for the wheel to revolve without affecting the bike. This reduces problems associated with wear and tear during the rotation of the wheel. At the time of in stalling the wheel one was required to know how to calculate frequencies to be used, angular acceleration, velocity and time taken by the wheel to complete one revolution. This has been done in the case above. In the above case the diameter of the wheel played an important role. At the begging the wheel will start moving with aching speed because of the acceleration however it will reach a point where the acceleration rate will be constant until the velocity is changed. At a point when change in time is equal to zero, change in velocity is not perpendicular to velocity, and then the wheel will fit into our bike. Adams Model This model will require accuracy in computing the variables of the Motorcycle Rear Suspension since the Motorcycle Rear Suspension will not be rigid. The following is the specification of the Motorcycle Rear Suspension that will be modeled using Adam’s software. Motorcycle Rear Suspension Technical Specification Maximum stroke Spring rate Static length Travel length Wheel Centre Distance Widths Pressure Angle 50mm 400N/mm 330mm 120mm 15mm 120 mm Total Speed Ratio I 136.56 Rated Motor Power kW 100 x 2 Rated Motor Velocity Rpm 645 In order for modeling to be successful, the data is input into Adams software to design and model of Motorcycle Rear Suspension in diagram below; Figure 1: Motorcycle Rear Suspension Technical Specification The next step is designing the different sub-systems: mobility system and functional system. This model has been transformed and transferred to Adam’s multi-body model for simulation. In the model, the wheels are supported by bearings and will be recorded by the number they will make. The Motorcycle Rear Suspension has a spring which is fixed but can stretch during use or when torque will be applied in order for it to work well. The initial conditions during simulation were torque force of 400N/mm with a spring rate of 50 mm/s. The static length for the simulation was set at 330mm. The outcome will look as the screenshot below; The system proposed above is in use in many engineering section however, the cost of manufacture and maintenance is inhibitive. It requires large space to be effective and efficient. The combination of such values is generally used during the calculation of the general output values therefore characterizing a certain mechanical condition regarding the Motorcycle Rear Suspension. As such, the initial values do match up to the overall state of the Motorcycle Rear Suspension while the ensuing value normally corresponds to a state of the specified bearings. Considering the second value, it may be used in similar manner like detecting other mechanical problems that are characterized during impacts. They do contain the data that is supposed to be used during the analysis that does follow. In addition, they also contain particularly direct indication regarding the Motorcycle Rear Suspension that is being monitored. Simulation was done for duration of 0.6 seconds where the time interval was 0.003 seconds. The resistance force which was applied on the shaft of the Motorcycle Rear Suspension was 400N/mm. The initial velocity that was used acted on the output shaft producing a maximum torque on the shaft. The graphs below shows the results of the simulation carried out using Adams software Figure 2: suspension Figure 3: Unreliability Plot Fig4: . Reliability Plot Fig5. Failure Rate Plot Fig6. F/S Timeline Plot Stress Calculations This is very important in ensuring material used are not strained beyond capacity. We begin with springs and bolts helping to attach the various components together. The rod supports are fixed onto the frame hence not exhibiting and shear stresses when the bike is stationary. However, once movement begins shear stress is present in the structure because it resists the entire weight of the car from the beginning till it descends completely. Discussion It is obvious that a fault Motorcycle Rear Suspension can be a source of major system failure if it is not measured and adequately designed. It is posted for this discussion that where extreme reliability is needed in the measurement and designing. Although this may be limited to a single component, it is notable for the ability to give sufficient information about the vibration that can be useful in determining the cause and source of a vibration in a machine. And as noted in the case of an engine in which reciprocating forces are applied, it is obvious that to train the dataset so as to enhance the extra body vibrations in the system will require a permanent online monitoring system to overlay such signals. After this short understanding of what constitute a Adams software and how one can transform the Adams software from a complex to a real form and vice versa, it is also important to understand how it works and also how it helps in the achievement of the aforementioned permutations and transformation. A typical complex notation in an Adams software computation is also made up of the time and frequency domains which contain a single signal in each of these domains that is constituted by N complex numbers. It is thus important to note that since each complex variable consists of two numbers, the multiplication of these variables must involve the combination of the four individual components in order to form a single product that is also made up of two components just like the initial variables. Conclusion In the production, design, modeling and simulation of a Motorcycle Rear Suspension various procedures and testing are done to ensure that the Motorcycle Rear Suspension produced is going to function at the minimum without any effect. The simulation has shown that Adam’s software can use the model to the Motorcycle Rear Suspension. The dynamics performance was the bike amounted to a gear with a perfect Motorcycle Rear Suspension and another with a fault was revealed. Dynamics simulation will help in fault diagnosis regarding Motorcycle Rear Suspension and the manufacturers and the users are keen enough to include certain diagnostics features located in the software meant to improve reliability and scalability. Apart from the location of precise harmonic mechanism particularly in the supposed line which is known signature analysis. There are other signals like the speed, specified torque, unnecessary and necessary noise as well as vibration generally is explored regarding their frequencies and their contents. In addition, there are other different techniques like the thermal measurements as well as chemical analysis which are also deployed as a way if establishing the nature of particular elements and the degree of the Motorcycle Rear Suspension. Works Cited Adams, Maurice. Rotating Machinery Vibration: From Analysis to Troubleshooting. London: CRC Press, 2000. Print Forshoffer, William. Forsthoffer's Best Practice Handbook for Rotating Machinery. Elsevier Science & Technology, Manchester: 2011. Print. Forsthoffer, William. Forsthoffer's Rotating Equipment Handbooks: Principles of rotating equipment. Manchester: Elsevier, 2006. Print. Kong, Dewen, Jim, Meagher and Xi Wu. Dynamics Simulation and Malfunction Diagnosis of Heavy Machinery Using MSC ADAMS. Apr. 2009. 25 Nov. 2012 Norfield, Derek. Practical balancing of rotating machinery. Elsevier, London: 2006. Print. Overton, Caroline, Colin Davis, Lindsay McMillan and Robert Shaw. Rotating machinery: practical solutions to unbalance and misalignment. The Fairmont Press, Inc., London: 2004. Print. Robichaud, Michael. Reference Standards for Vibration Monitoring and Analysis. Saint John, NB Canada. n.d. Read More