Abstract
Machinery can suffer from mechanical vibrations since resonance may be generated from time-varying external excitations under different operation conditions. These detrimental vibrations may significantly influence the device's performance, effectiveness and reliability in operation. In this paper, an innovative, simple and high-efficiency tuned vibration absorber (TVA) consisting of shape memory alloy (SMA) wires, which is referred to a wire-type tuned vibration absorber (WTVA), is proposed to reduce the induced vibration. Experiments are carried out using a six-degree-of-freedom platform which is designed to simulate the frame of precision machinery in practical applications. With the equivalent stiffness of SMA wires adjusted by the controlled electric current, the frequency tunability of WTVA can be achieved. When the natural frequency of WTVA tuned in with the disturbance frequency, the experimental results demonstrate that the efficiency in vibration reduction of the platform is drastically increased even with considerable weight difference between WTVA and the platform. Moreover, the tunable frequency span also increases greatly due to the new design of WTVA and the material characteristics of SMA wires.
Highlights
Due to advances in industry, the demands for product precision and reliability have become more stringent
The DC power supply provides the control electric current to shape memory alloy (SMA) wires in order to precisely adjust the natural frequency of the wire-type tuned vibration absorber (WTVA)
This paper proposes the feasibility of the wire-type vibration absorber (WTVA) with simple and tiny architecture, which consists of the shape memory alloy (SMA) wires and the auxiliary mass with strain gages
Summary
Due to advances in industry, the demands for product precision and reliability have become more stringent. Most of the machinery is operated under the influence of rotating drivers, such as motors and fans, which will incite the oscillations from their rotational imbalances. The excitation frequency from devices during operation matches its natural frequency and induces the so-called resonant vibration. The resonance will usually cause excess noise, and influence the accuracy and the service life of machinery. Many experts and scholars focus much of their efforts in how to effectively avoid and reduce vibration, especially under resonance. While the machinery is operated under varied rotating speeds, resonance at the different frequencies may be generated due to varied excitation frequencies. The requirements of robust vibration reduction for machinery must be adaptive and tunable
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
