Capturing Nonlinear Vibratory Roller Compactor Behavior through Lumped Parameter Modeling
Publication: Journal of Engineering Mechanics
Volume 134, Issue 8
Abstract
Continuous monitoring of soil properties using an instrumented roller compactor requires models that can capture the essential features observed during drum/soil vibration. This paper presents the results of lumped parameter modeling of the drum/soil system together with data from complex nonlinear behavior observed experimentally during operation on sandy soil. Model parameters and response were developed using experimental data collected over a wide range of operating frequencies. Three and four-degree-of-freedom (DOF) models with linear and nonlinear soil elements were investigated. The results showed that a 3DOF model incorporating the soil, drum, and frame of the roller was successful in capturing behavior during coupled drum/soil vibration and during decoupling (i.e., loss of contact between drum and soil). Modeling the drum/soil decoupling accounted for most of the experimentally observed nonlinearity. The addition of nonlinear soil stiffness due to the curved drum effect and due to strain hardening soil behavior accounted for additional nonlinearity observed experimentally. Experimentally observed drum rocking during coupled drum/soil vibration was successfully modeled with a 4DOF drum-frame model. The analysis also revealed that commonly observed heterogeneous soil conditions give rise to a transient response that can have a significant influence on vibration behavior.
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Acknowledgments
The writers wish to thank the NSF (Grant No. NSFCMS-0327509) for their financial support and Ingersoll-Rand for the use of their DD138 roller. They also thank Robert V. Rinehart and Patrick K. Miller for their assistance with data gathering and for their insights in discussing results.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 134 • Issue 8 • August 2008
Pages: 684 - 693
Copyright
© 2008 ASCE.
History
Received: Oct 17, 2006
Accepted: Jan 31, 2008
Published online: Aug 1, 2008
Published in print: Aug 2008
Notes
Note. Associate Editor: Anil Misra
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