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Shock and Vibration
Volume 2015, Article ID 741986, 12 pages
Research Article

In-Structure Shock of Surface Structures: A Theoretical Approach

1School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
2Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576

Received 14 May 2015; Revised 6 July 2015; Accepted 7 July 2015

Academic Editor: Sakdirat Kaewunruen

Copyright © 2015 Hongyuan Zhou and Xiaojuan Wang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Metal foam cladding emerges as a promising measure for structure protection against close range blast. With proper cladding design, a considerable amount of energy can be absorbed while the load transmitted to the protected structure can be lowered to a controllable level, leading to less damage of the protected structure. However, it is not clear whether the in-structure shock can be mitigated by attaching foam cladding. The present study theoretically investigates the response of a structural member subjected to a close range blast, for both scenarios with and without attaching foam cladding. Subsequently, shock response spectra are employed to assess the in-structure shock of both situations. It is found that applying foam cladding does not effectively mitigate in-structure shock of surface structures.