Effect of Cycle Time on Work Done by the Pistons During Hydraulically Actuated Clamshell Dredging


Research to evaluate possible metrics for predicting dredgeability of compact aggregates, by hydraulically actuated clamshell dredges, shows work done by the pistons as a viable metric. Analysis of field data shows that there is a low, positive, correlation between cycle time (CT) and work done. If this correlation exists, then CT has to be considered an independent variable affecting work done during dredgeability assessment. Further research is required to elucidate the relationship between CT and work done during dredging. The objective of this paper is to test the hypothesis that work done during dredging increases with increasing CT. Kinematics and dynamics of the hydraulic clamshell were modeled and implemented in Simulink® in MATLAB. The model was validated using field data. The model was then used to test the research hypothesis. The results show that work done increases with increasing CT. This work confirms that work done during dredging increases with increasing CT. This result indicates that though an operator can increase the CT to deal with difficult digging, inputting unduly high CTs results in higher energy consumption during dredging.

Meeting Name

SME Annual Meeting and Exhibit and CMA 113th National Western Mining Conference 2011


Mining Engineering

Document Type

Article - Conference proceedings

Document Version


File Type





© 2011 Society for Mining, Metallurgy & Exploration Inc. (SME), All rights reserved.

Publication Date

01 Jan 2011

This document is currently not available here.