Browsing by Author "Khedkar, N."

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Simulation of electromagnetic launcher structure using finite element method
(2015) Bhavsar, N.; Budhiya, S.; Maniyeri, R.; Khedkar, N.
Electromagnetic launchers use electricity to fire projectile instead of conventional fuels. In this paper, three-dimensional Finite Element Method (FEM) simulation of the deformation of the rails and containment structure of the electromagnetic launcher is presented. The containment structure of the launcher has to counter the repulsive electromagnetic forces. The repulsive forces also push the rails apart and cause the armature to loose contact with rails. A three-dimensional model is prepared and studied to understand the behavior of the structural elements and the deformation of the different launcher components. The model is simulated by the finite element method using ANSYS commercial software. The simulation provides fundamental understanding that both static and dynamic responses of the launcher are important and needs to be studied. The simulation results of static analysis and the importance of dynamic analysis and its effects have been discussed in the present work. Research India Publications.
Simulation of electromagnetic launcher structure using finite element method
(Research India Publications subscription@ripublication.com, 2015) Bhavsar, N.; Budhiya, S.; Maniyeri, R.; Khedkar, N.
Electromagnetic launchers use electricity to fire projectile instead of conventional fuels. In this paper, three-dimensional Finite Element Method (FEM) simulation of the deformation of the rails and containment structure of the electromagnetic launcher is presented. The containment structure of the launcher has to counter the repulsive electromagnetic forces. The repulsive forces also push the rails apart and cause the armature to loose contact with rails. A three-dimensional model is prepared and studied to understand the behavior of the structural elements and the deformation of the different launcher components. The model is simulated by the finite element method using ANSYS commercial software. The simulation provides fundamental understanding that both static and dynamic responses of the launcher are important and needs to be studied. The simulation results of static analysis and the importance of dynamic analysis and its effects have been discussed in the present work. © Research India Publications.
Thermal analysis of electromagnetic launcher using numerical simulation
(2015) Thakur, U.; Budhia, S.; Maniyeri, R.; Khedkar, N.
The electromagnetic launcher is a high energy device which fires the projectile at hypervelocity. It uses high intensity electrical current pulse to accelerate projectile at such high velocity. This paper describes the thermal effects on armature of the electromagnetic launcher due to frictional heat generated between armature and the rails as well as heat generation due to joule heating in the rails. Finite element model is developed to obtain the temperature distribution on armature due to friction using ANSYS commercial software. Also, a numerical code in MATLAB is developed to obtain temperature distribution in the rails due to joule heat. Based on these analyses, it is found that heat generated due to friction plays dominant role. Also, other factors like joule heating at the contact of armature and rail, arcing at contact can increase the temperature and can cause armature to be melt and deposit on rail, which may affect the launcher performance. Research India Publications.
Thermal analysis of electromagnetic launcher using numerical simulation
(Research India Publications subscription@ripublication.com, 2015) Thakur, U.; Budhia, S.; Maniyeri, R.; Khedkar, N.
The electromagnetic launcher is a high energy device which fires the projectile at hypervelocity. It uses high intensity electrical current pulse to accelerate projectile at such high velocity. This paper describes the thermal effects on armature of the electromagnetic launcher due to frictional heat generated between armature and the rails as well as heat generation due to joule heating in the rails. Finite element model is developed to obtain the temperature distribution on armature due to friction using ANSYS commercial software. Also, a numerical code in MATLAB is developed to obtain temperature distribution in the rails due to joule heat. Based on these analyses, it is found that heat generated due to friction plays dominant role. Also, other factors like joule heating at the contact of armature and rail, arcing at contact can increase the temperature and can cause armature to be melt and deposit on rail, which may affect the launcher performance. © Research India Publications.