Simplified Model for Analyzing Soft Impacts on Structures: Validation on Steel Beams
Publication: Journal of Structural Engineering
Volume 150, Issue 12
Abstract
Traditionally, simplified methods have been used to try to solve and understand impacts. These simplified methods sometimes assume hypotheses that excessively limit their applicability or are not sufficiently simplified and require numerical solutions. To analyze the influence of projectile flexibility in the structural response to impacts, finite element (FE) models are commonly used due to the limitations of simplified methods. This article proposes a new simplified model that enables the calculation of both structural displacement and contact force during an impact on simple structures, which can be represented as a spring-mass system, such as beams. The model takes into account projectile deformation and the effect of gravitational force on the structural response, providing an analytical solution. The proposed formulation has been validated by means of experimental impact tests and with finite-element models of impacts on beams. The effect of gravity, multiple impacts, and the influence of projectile flexibility when defining soft or hard impact are discussed in depth in this article. This research enables the calculation of complex impacts in an easy way while also facilitating the understanding of the phenomenon and the key parameters for managing it.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
We would like to thank Simulsoft Ingenieros España for lending the Midas NFX software for use in this research, which has been of great help.
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© 2024 American Society of Civil Engineers.
History
Received: Jan 18, 2024
Accepted: Jun 20, 2024
Published online: Sep 24, 2024
Published in print: Dec 1, 2024
Discussion open until: Feb 24, 2025
ASCE Technical Topics:
- Analysis (by type)
- Beams
- Continuum mechanics
- Dynamic loads
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Finite element method
- Methodology (by type)
- Models (by type)
- Numerical analysis
- Numerical methods
- Projectile penetration
- Research methods (by type)
- Solid mechanics
- Steel beams
- Steel structures
- Structural analysis
- Structural dynamics
- Structural engineering
- Structural members
- Structural models
- Structural systems
- Structures (by type)
- Validation
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