International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 03 Issue: 07 | July-2016 www.irjet.net p-ISSN: 2395-0072 © 2016, IRJET | Impact Factor value: 4.45 | ISO 9001:2008 Certified Journal | Page 807 ESTIMATION OF NATURAL FREQUENCY OF MOTORCYCLE HANDLEBAR Sachin M. Baad 1 , Prof. M. G. Qaimi 2 1 Student, M.E. (Design Engineering), DYPIET, Ambi, Pune 2 Assistant Professor, Department of Mechanical Engineering, DYPIET, Ambi, Pune ---------------------------------------------------------------------***--------------------------------------------------------------------- motorcycle. It is complex in structure and has important role as functionality and safety point of view. Handlebar assembly consists of mirrors, brake levers, clutch, head lamp and plastic coverings. The failure comes in the handlebar because of engine vibrations, uneven road surface, bumps, rider force, braking etc. Fig-1: Handlebar assembly Fig- 2: Motorcycle handlebar (HERO SPLENDOR PLUS) 2. ESTIMATION OF NATURAL FREQUENCY The natural frequency of a system is the frequency at which it will vibrate freely (i.e in the absence of damping) in simple harmonic motion, when set in motion. Free vibrations of any elastic body are called natural vibrations and occur at a frequency called the natural frequency. The natural frequency of a structure depends on its physical characteristics like for example - its mass and stiffness. A system with n degrees-of-freedom, will have n modes of vibration - each of which has its own natural frequency. 2.1 Mathematical Modeling Mathematically Natural Frequency of the handlebar is calculated as below ……... (1) where k is stiffness of handlebar d 2 o- d 2 i) where do=outer diameter of handlebar =22.3mm di=inner diameter of handlebar =18.4 L=length of spring L =1000 mm 1.INTRODUCTION Motorcycle handlebar is rider’s fist touch point to the Abstract - This paper gives the natural frequency motorcycle handlebar (HERO SPLENDOR PLUS). The motorcycle handlebar is modeled by using CATIA and analyzed by using ANSYS a conventional FEM package. Here we are going to compare the natural frequency by FEM package with the practically by using FFT analyzer, so as to compare working frequency with natural frequency for validation purpose. Key Words: Natural frequency HERO SPLENDOR PLUS, handlebar, ANSYS, FFT analyser