KUKU RAFIU OLALEKAN

Mechanical Engineering

At the Mechanical Engineering department office

Appointment on Visitation important

Topic: INVESTIGATION OF COCONUT FIBRE BENEFICIATION FOR BIFURCATION AND CHAOS CONTROL IN DYNAMICAL SYSTEMS.

Description: Bifurcation is the study of changes in the topological structure of a system. A bifurcation occurs when a small smooth change made to the parameter values of a system causes a sudden qualitative or topological change in its behavior. Bifurcation occurs in both continues and discrete systems such as structures and vibrating machinery. The level of vibration in a structure can be attenuated by reducing either the excitation, or the response of the structure to that excitation or both. It is sometimes possible, at the design stage, to reduce the exciting force or motion by changing the equipment responsible, by relocating it within the structure or by isolating it from the structure so that the generated vibration is not transmitted to the supports. The structural response can be altered by changing the mass or stiffness of the structure, by moving the source of excitation to another location, or by increasing the damping in the structure. Naturally, careful analysis is necessary to predict all the effects of any such changes, whether at the design stage or as a modification to an existing structure. It is necessary to analyse the vibration of structures in order to predict the natural frequencies and the response to the expected excitation. The natural frequencies of the structure must be found because if the structure is excited at one of these frequencies resonance occurs, with resulting high vibration amplitudes, dynamic stresses and noise levels. Accordingly resonance should be avoided and the structure designed so that it is not encountered during normal conditions; this often means that the structure need only be analysed over the expected frequency range of excitation.The problems associated with structure and machinery vibration cannot be over emphasized. The catastrophic behaviors of machinery in manufacturing industry has led to the destruction of lives and properties over the years. The research tends to evaluate the characteristics of machine and structure behavior to vibrational sources and develop a new vibration damping attenuating material using the coconut fiber for purpose of building an effective damping device for dynamical systems.

#	Certificate	School	Year
1.	Ph.D (Mechanical Engineering)	Mechanical Engineering Department, Lagos State University Ojo, Nigeria.	2020

PARAMETER ESTIMATION & ANALYSIS OF DAMPING PROPERTY FOR COCONUT FIBER IN MACHINERY VIBRATION

AIM: Developing a damping alternating device for machinery and building structure through the benefication of coconut fiber.OBJECTIVES:1. Analysis and characterization of the vibration structure of individual machinery.2. Obtaining the mechanical and dynamical characteristics of coconut fiber.3. Dynamic test investigation of the relationships of the mechanical properties of coconut fiber and its dynamics characteristics.4. Development of coconut fiber alternating device.5. Performance eveluation of the coconut fiber in comparison with existing devices of other materials.INTRODUCTION.Vibration is a mechanical phenomenon whereby oscillations occur about an equilibrium point. The word comes from Latin vibrationem shaking, brandishing . The oscillations may be periodic, such as the motion of a pendulum or random, such as the movement of a tire on a gravel road.Vibration can be desirable: for example, the motion of a tuning fork, the reed in a woodwind instrument or harmonica, a mobile phone, or the cone of a loudspeaker.Most Common Causes of Machine VibrationVibration can result from a number of occurrences, acting alone or in combination. Keep in mind that vibration problems may be caused by auxiliary devices, not just the primary devices. One of the major causes of vibration.Imbalance: A heavy spot in a rotating rotating component will cause vibration when the unbalanced weight rotates around the machine s axis, creating a centrifugal force. Imbalance could be caused by manufacturing defects machining errors, casting flaws or maintenance problem deformed or dirty fan blades, missing balance weights . As machine speed increases, the effects of imbalance become greater. Imbalance can severely reduce bearing life as well as cause unneeded machine vibration.Effects of VibrationThe effects of vibration can be severe. Unchecked machine vibration can accelerate rates of wear i.e. reduce bearing life and damage equipment. Vibrating machinery can create noise and cause safety problems.

KUKU RAFIU is a Lecturer I at the Department of Mechanical Engineering

KUKU has a Ph.D in Mechanical Engineering from Mechanical Engineering Department, Lagos State University Ojo, Nigeria.