Examination of Tuning Concepts Using Rubber Mounts
tuned mass absorber
narrow band tuning
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Publisher:The Ohio State University
Series/Report no.:The Ohio State University. Department of Mechanical and Aerospace Engineering Honors Theses; 2013
Rubber mounts are common components within automotive vehicle powertrains and suspensions. They provide compliance at joints between substructures as well as provide vibration isolation between structures. These mounts are often designed to certain stiffness and damping values within a given frequency range. Narrow band tuning with regards to dynamic stiffness is difficult to achieve using mechanical force transmission elements without the incorporation of internal hydraulic elements. This project analytically and experimentally investigates the feasibility of rubber mount designs without hydraulic elements that have a notch-type behavior in its dynamic stiffness near 100-125 Hz over a frequency range of 0 to 500 Hz, with a dynamic stiffness range between 50 and 500 N/mm, and with a maximum mass of 5 kg. Based on these constraints, multiple dynamic stiffness component-level models (with displacement input and force output) are examined analytically. A prototype is designed, fabricated, and evaluated using finite element analysis and experimental testing. The prototype evaluation shows notch-type behavior in its transmitted force through the mount in a bench experiment; however, future evaluation is still required to evaluate the load capacity of the component and determine its effect within a system-level environment.
Related Item:Academic Major: Mechanical Engineering
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