The paper addresses the problem of determining the accidental forklift truck impact forces on steel storage racks. Based on first principles of mechanics, simple models of a loaded forklift truck and a drive-in racking
structure are presented. Model masses, as well as stiffness and damping coefficients are calibrated against
experimental results obtained from tests of a forklift truck and a drive-in racking structure. Comparisons
between experimental results and solutions obtained from the simple mechanical models show that the
simple models accurately reproduce the static and dynamic behaviours of their associated structures.
Based on the drive-in rack impact test results presented in a companion paper (Gilbert and Rasmussen,
submitted for publication) [1] and the simple mechanical models for drive-in racks, actual impact forces
are calculated and presented. Finally, using the impact test results and the simple mechanical models, the
actual motion of the forklift truck body is calculated. This motion, being a common characteristic to all
drive-in racking impacts, allows impact forces to be obtained for various pallet loads, impact elevations
and rack characteristics. Thus, the paper concludes with a general method for calculating forces generated
under forklift truck impact.
The paper addresses the problem of determining the accidental forklift truck impact forces on steel storage racks. Based on first principles of mechanics, simple models of a loaded forklift truck and a drive-in rackingstructure are presented. Model masses, as well as stiffness and damping coefficients are calibrated againstexperimental results obtained from tests of a forklift truck and a drive-in racking structure. Comparisonsbetween experimental results and solutions obtained from the simple mechanical models show that thesimple models accurately reproduce the static and dynamic behaviours of their associated structures.Based on the drive-in rack impact test results presented in a companion paper (Gilbert and Rasmussen,submitted for publication) [1] and the simple mechanical models for drive-in racks, actual impact forcesare calculated and presented. Finally, using the impact test results and the simple mechanical models, theactual motion of the forklift truck body is calculated. This motion, being a common characteristic to alldrive-in racking impacts, allows impact forces to be obtained for various pallet loads, impact elevationsand rack characteristics. Thus, the paper concludes with a general method for calculating forces generatedunder forklift truck impact.
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