REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

STRESS ANALYsiS OF INTEGRATED 12.7 mm MACHINE GUN MOUNT

Aleksandar Kari

Military Academy, University of Defense in Belgrade, aleksandarkari@gmail.com

Dušan JovanoviĆ

Faculty of Engineering, University of Kragujevac, djovanovic.jovanovic7@gmail.com

DAMIR JERKOVIĆ

Military Academy, University of Defense in Belgrade, damir.jerkovic@va.mod.gov.rs

NEBOJŠA HRISTOV

Military Academy, University of Defense in Belgrade, nebojsahristov@gmail.com

Abstract: The paper describes the problem of integration 12.7 millimeters machine gun on the mobile platform. Based on the dimensions of the machine gun modeling of machine guns mount with cradle is done. The completed model is fully functional and realistic. Using optimized internal ballistic parameters the calculations of recoil forces and loading of mount and rotating bearing are executed. The loading calculation of bearing was made in two ways. In the first case finite element method is applied and software package FEMAP was used. The second method is based on calculating the resistance components of bearing from the equilibrium condition. At the end the comparative analysis of data obtained from these two methods was done.

Keywords: integrated machine gun, stress analysis, recoil force, bearing.