Table of Contents Author Guidelines Submit a Manuscript
Shock and Vibration
Volume 2017, Article ID 8564381, 15 pages
Research Article

Estimation of Impact Loads in a Hydraulic Breaker by Transfer Path Analysis

1Department of Mechanical Engineering, Hanyang University, 1271 Sa-1-Dong, Ansan, Kyunggi-Do, Republic of Korea
2Construction Equipment R&D Center, Korea Institute of Industrial Technology, Gyeongsan-si, Republic of Korea
3R&D Center Breaker Development Team, Soosan Heavy Industries Co., Ltd, Hwaseong-si, Republic of Korea

Correspondence should be addressed to Sang Seuk Kweon;

Received 13 June 2017; Accepted 27 August 2017; Published 22 November 2017

Academic Editor: Filippo Ubertini

Copyright © 2017 Changheon Song et al. 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.


The aim of this study is to estimate the impact loads delivered to the housing of a hydraulic breaker quantitatively. Striking forces caused vibrations in the equipment housing, which were experimentally measured, and frequency response functions were also found through modal impact experiments. Transfer path analysis (TPA) method of the data quantified the impact loads delivered to the housing. TPA method can analyze the relationship between the vibration energy and the transfer path of an excitation source and so explore the way in which vibrations on each path contribute to the entire vibration profile. The impact loads of each part derived by TPA method were compared with the impact loads in the chisel derived from strain gauge measurements of the striking energy. This comparison validated the TPA approach. This study describes the basic concepts and components of TPA method and also reviews its applicability to mechanical equipment that experiences impact vibrations and impact loads.