| Pub. Date | : May, 2020 |
|---|---|
| Product Name | : The IUP Journal of Mechanical Engineering |
| Product Type | : Article |
| Product Code | : IJME40520 |
| Author Name | : Sanjivani M Pujari, V B Rajmane |
| Availability | : YES |
| Subject/Domain | : Engineering |
| Download Format | : PDF Format |
| No. of Pages | : 13 |
The paper considers the design of dual mass dynamic vibration absorber. This design incorporates use of two concentrated masses, which are cantilevered from two rods. The adaptive vibration absorber can be used to reduce structural vibrations at multiple frequencies. Adaptive solution is achieved by moving masses along the length of rod either inside or outside, producing changing natural frequency for absorber device. The effects of different absorber parameters like length of rod, distance between two rods and mass dimensions on modal frequencies of absorber are also discussed. Analysis of dual mass absorber is done theoretically and using finite element analysis. Its effectiveness is checked on cantilever beam. Analytical and finite element models are described. The results showed that the absorber is effective in cantilever beam vibration reduction up to 95%.
Dynamic Vibration Absorbers (DVAs) are devices attached to flexible structures in order to minimize vibration. Den (1956) first invented dynamic vibration absorber. Work on DVAs was undertaken rigorously during development of helicopter rotor blades. Harris and Crede (1988) provided a description of a number of different DVA arrangement, including pendulum and linear spring mass absorber. For reducing vibrations of towers, methods of constructing absorber as pendulum type, absorber with removable support and absorber with various steel ropes are studied by Kornev and Reznov (1993). Their aim was to develop practical absorber that facilitates vibration attenuation at multiple frequencies. For variable speed machines, tunable vibration absorbers are used (Walsh and Lamancusa, 1992; Christopher and George, 2000; and Yuri, 2007). Mekalke and Sutar (2016) formulated the equations of motion of a free cantilever beam. They used Euler-Bernoulli equation to find out natural frequencies of cantilever beams of different materials and geometries. Sushil and Pradeep (2014) investigated the use of tunable vibration neutralizers to reduce vibration of a beam at desired locations by creating single or multiple nodes. An iterative procedure was developed to find the required resonance frequencies of neutralizers to create nodes at selected locations. Muley and Pokale (2017) developed the variable stiffness and variable damping type vibration absorber to control the vibrations of primary system which is a cantilever beam structure using finite element method through ANSYS programming. Sayyad and Gadhave (2013) investigated the effect of magnetic vibration absorber along vibrating cantilever beam and developed a position of magnetic vibration absorber along the cantilever beam to adopt the change in vibratory system.
Absorber, Resonance, Finite element analysis