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Actuators for the generation of highly nonlinear solitary waves

Ni, Xianglei and Rizzo, Piervincenzo and Daraio, Chiara (2011) Actuators for the generation of highly nonlinear solitary waves. Review of Scientific Instruments, 82 (3). 034902. ISSN 0034-6748.

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In this paper we present the design of two actuators for the generation of highly nonlinear solitary waves (HNSWs), which are mechanical waves that can form and travel in highly nonlinear systems. These waves are characterized by a constant spatial wavelength and by a tunable propagation speed, dependent on the wave amplitude. To date, the simplest and widely adopted method to generate HNSWs is by impacting a striker onto a chain of beads of equal size and mass. This operation is conducted manually and it might be impracticable if repetition rates higher than 0.1 Hz are necessary. It is known that the HNSWs’ properties, such as amplitude, duration, and speed can be modified by changing the size or the material of the particles, the velocity of the striker, and/or the precompression on the chain. To address the limitations associated with the manual generation of HNSWs we designed, built, and tested two actuators. The first actuator consists of a chain of particles wrapped by an electromagnet that induces static precompression on the chain. This design allows for the generation of solitary waves with controlled properties. The second actuator consists of a chain surmounted by an electromagnet that lifts and releases a striker. This actuator permits the remote and noncontact generation of solitary waves. The performance of both actuators is evaluated by comparing the experimental HNSWs to theoretical predictions, based on the long wavelength approximation.

Item Type:Article
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URLURL TypeDescription DOIArticle
Daraio, Chiara0000-0001-5296-4440
Additional Information:© 2011 American Institute of Physics. Received 6 December 2010; accepted 29 January 2011; published online 10 March 2011. This work was supported by the National Science Foundation Grant No. CMMI-0825983 (Dr. Eduardo Misawa, Program Director). C.D. acknowledges support from NSF/CMMI-0844540 (Career). P.R. and X.N. also thank the 2009 ASNT Fellowship Award.
Funding AgencyGrant Number
American Society for Nondestructive Testing Fellowship AwardUNSPECIFIED
Subject Keywords:actuators; elastic waves; solitons
Issue or Number:3
Classification Code:PACS: 07.10.-h; 46.40.Cd
Record Number:CaltechAUTHORS:20110429-104706086
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23503
Deposited By: Jason Perez
Deposited On:29 Apr 2011 18:33
Last Modified:03 Oct 2019 02:47

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