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Developing a Structurally Modified Mechanical Lumped Model of the Human Tibia and Shin Guard Using Modal Analysis.

Ehsan Moghaddam1, Aref Afsharfard2

  • 1Mechanical Engineering Department, Ferdowsi University of Mashhad, Mashhad, Iran.

Annals of Biomedical Engineering
|December 22, 2024
PubMed
Summary

This study developed a mechanical model for shin guards to optimize force distribution. The optimized shin guard design effectively reduces impact force, enhancing bone protection.

Keywords:
Finite element methodGenetic algorithmMechanical lumped modelModal analysisShin guardTibia bone

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Area of Science:

  • Biomechanics
  • Mechanical Engineering
  • Sports Science

Background:

  • Shins are highly susceptible to injury.
  • Shin guards are crucial protective equipment in sports.
  • Evaluating shin guard effectiveness in force reduction is vital.

Purpose of the Study:

  • To develop a modified mechanical lumped model for shin guards.
  • To optimize force distribution through physical parameter modification and genetic algorithms.
  • To determine optimal stiffness values for enhanced shin guard performance.

Main Methods:

  • Developed a structural modified mechanical lumped model.
  • Employed physical parameter change modification and genetic algorithms.
  • Utilized modal analysis and finite element methods (FEM) for dynamic behavior analysis (0-3000 Hz).

Main Results:

  • FEM results showed good agreement with experimental tests (MAE=34.94).
  • Identified two design zones for selecting shin guard stiffness.
  • Determined optimal stiffness values (K1=7.9x10^5 N/m, K2=6.3x10^5 N/m) leading to 76% force distribution.

Conclusions:

  • The developed model effectively predicts shin guard performance.
  • Optimized stiffness parameters significantly improve force distribution.
  • The study provides a framework for designing more effective shin guards.