Experimental Investigation of a Rammer Soil Compactor Machine on Linear Spring Foundation

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Anders Jönsson, Göran Broman
Title: Experimental Investigation of a Rammer Soil Compactor Machine on Linear Spring Foundation
Translated title: Experimentel undersökning av en jordkompakteringsmaskin på linjärt fjäderunderlag
Conference name: NAFEMS World Congress 2001
Year: 2001
ISBN: 1 874376 30 1
Publisher: NAFEMS
City: Glasgow
Organization: Blekinge Institute of Technology
Department: Dept. of Mechanical Engineering (Institutionen för maskinteknik)
Dept. of Mechanical Engineering S-371 79 Karlskrona
+46 455 38 50 00
Authors e-mail: anders.jonsson@bth.se
Language: English
Abstract: Rammer compactor machines perform impact soil compaction, which is very efficient compared to static compaction. They are often used in places where a high degree of compaction is needed and the space for operation is limited. The complexity of this machine type makes design optimisation through traditional prototype testing impractical. This has pointed to the need for a theoretical model and simulation procedure for prediction of the dynamic behaviour of the machine. To be useful for optimisation as design parameters are changed during product development the theoretical model and simulation procedure must be verified.

By concurrently working with theoretical modelling, simulations, experimental verifications, and optimisation an efficient analysis support for product development is achieved. This co-ordination works both ways in an iterative manner. Experimental investigations are used to verify theoretical models and simulations. Theoretical models and simulations are used to design good experiments. This Complete Approach concept makes better decisions possible earlier in the development process, resulting in decreased time to market and improved quality.

In this paper the Complete Approach concept is described. It is applied on a rammer soil compactor machine. An introductory iteration, with emphasis on the experimental part, is described. In the experimental set-up the rammer foot is attached to a linear spring foundation. This eliminates uncertainties related to soil modelling and makes a check of the model of the machine itself possible. The good agreement between theoretical and experimental results indicates that the theoretical model and simulation procedure should be useful for introductory optimisation studies. Reasons for the discrepancy are discussed and suggestions for improvements of both the theoretical model and the experimental set-up in coming iterations are given.
Summary in Swedish: En experimentell undersökning av det dynamiska beteendet hos en jordkompakteringsmaskin har gjorts. Resultaten visar att tidigare simuleringsmodeller saknar ett hastighetsberoende som kan påvisas vid analys av mätresultaten
Subject: Mechanical Engineering\General
Mechanical Engineering\Structural Mechanics
Keywords: Soil Compaction, Rammer Compactor Machine, Experimental Investigation