The Experts below are selected from a list of 6960 Experts worldwide ranked by ideXlab platform
David Z Yankelevsky - One of the best experts on this subject based on the ideXlab platform.
-
prediction of the quasi static pressure in confined and partially confined explosions and its application to blast response simulation of flexible structures
International Journal of Impact Engineering, 2016Co-Authors: V.r. Feldgun, Yuri S. Karinski, Idan E Edri, David Z YankelevskyAbstract:Abstract The paper aims at understanding some characteristics of an interior explosion within a room with limited venting. Internal explosions may occur as a result of an ammunition storage explosion, or a charge explosion within a room in a Terrorist Action or a warhead explosion following its penetration into a closed space. The paper deals with one of the basic aspects of internal blast – residual blast pressure (gas pressure, quasi-static pressure). The article presents different models for the prediction of the gas pressure. The sensitivity of the gas pressure to the heat capacity ratio and internal energy of explosion is studied. It is demonstrated that the heat capacity ratio has a much stronger effect on the gas pressure than the internal energy of explosion. It is shown that a thermodynamic model based on accounting for the afterburning energy release shows best agreement with experimental data. This method takes into account the variation of the total energy released and the heat capacity ratio depending on the ratio between the charge weight divided by the confined air volume. It is demonstrated that the proposed simplified approach based on using the developed gas pressure as well as on the Bernoulli equation for the quasi-stationary phase is well suited for simulation of partially confined explosions and properly describes the pressure relief and gas outflow from the vented room. The developed gas pressure can be successfully applied to simulation of confined blast response of flexible structures. An analytical solution of the SDOF blast response of a flexible structure is implemented. It is shown that the simplified approach based on the quasi-static gas pressure properly describes the elastic-plastic shell behaviour. It shows a good agreement with test data and with a solution using pressure time history obtained by AUTODYN simulation.
-
on blast pressure analysis due to a partially confined explosion iii afterburning effect
International Journal of Protective Structures, 2012Co-Authors: Idan E Edri, V.r. Feldgun, Yuri S. Karinski, David Z YankelevskyAbstract:This paper aims at extending our understanding with regard to some characteristics of an interior explosion within a room with limited venting. An interior explosion may be the result of an ammunition storage explosion, or an explosive charge as part of a Terrorist Action or a warhead explosion that follows its penetration into a closed space in a military Action. Full scale experiments have been performed with a TNT charge detonated at the center of a single room sized space with rigid boundaries. The room has a limited size opening for venting at the ceiling. Numerical simulations of the problem have been performed using AUTODYN Ver. 12.1 and compared with the experimental measurements. Some deviations between the measured pressure and the predicted pressure motivated the present study in an attempt to study the effect of the additional energy released due to the burning of the detonation products reacting with the surrounding oxygen. The study that is described in this paper enhanced our understanding....
-
on blast pressure analysis due to a partially confined explosion i experimental studies
International Journal of Protective Structures, 2011Co-Authors: Idan E Edri, V.r. Feldgun, Z Savir, Yuri S. Karinski, David Z YankelevskyAbstract:This paper presents a first stage of a study aimed at understanding some characteristics of an interior explosion within a room with limited venting. An interior explosion may occur accidentally in ammunition storage, or due to a Terrorist Action, or as a result of a warhead explosion that follows its penetration into a closed space. The full scale experimental study is focusing on a single room sized space with rigid boundaries, at the center of which a TNT charge is detonated. The room has a limited size opening for venting at the ceiling. The effect of the charge size on the blast pressures has been investigated and a new insight with regard to the pressure distribution on the walls as well as the pressure attenuation depending on these parameters has been gained.
Idan E Edri - One of the best experts on this subject based on the ideXlab platform.
-
prediction of the quasi static pressure in confined and partially confined explosions and its application to blast response simulation of flexible structures
International Journal of Impact Engineering, 2016Co-Authors: V.r. Feldgun, Yuri S. Karinski, Idan E Edri, David Z YankelevskyAbstract:Abstract The paper aims at understanding some characteristics of an interior explosion within a room with limited venting. Internal explosions may occur as a result of an ammunition storage explosion, or a charge explosion within a room in a Terrorist Action or a warhead explosion following its penetration into a closed space. The paper deals with one of the basic aspects of internal blast – residual blast pressure (gas pressure, quasi-static pressure). The article presents different models for the prediction of the gas pressure. The sensitivity of the gas pressure to the heat capacity ratio and internal energy of explosion is studied. It is demonstrated that the heat capacity ratio has a much stronger effect on the gas pressure than the internal energy of explosion. It is shown that a thermodynamic model based on accounting for the afterburning energy release shows best agreement with experimental data. This method takes into account the variation of the total energy released and the heat capacity ratio depending on the ratio between the charge weight divided by the confined air volume. It is demonstrated that the proposed simplified approach based on using the developed gas pressure as well as on the Bernoulli equation for the quasi-stationary phase is well suited for simulation of partially confined explosions and properly describes the pressure relief and gas outflow from the vented room. The developed gas pressure can be successfully applied to simulation of confined blast response of flexible structures. An analytical solution of the SDOF blast response of a flexible structure is implemented. It is shown that the simplified approach based on the quasi-static gas pressure properly describes the elastic-plastic shell behaviour. It shows a good agreement with test data and with a solution using pressure time history obtained by AUTODYN simulation.
-
on blast pressure analysis due to a partially confined explosion iii afterburning effect
International Journal of Protective Structures, 2012Co-Authors: Idan E Edri, V.r. Feldgun, Yuri S. Karinski, David Z YankelevskyAbstract:This paper aims at extending our understanding with regard to some characteristics of an interior explosion within a room with limited venting. An interior explosion may be the result of an ammunition storage explosion, or an explosive charge as part of a Terrorist Action or a warhead explosion that follows its penetration into a closed space in a military Action. Full scale experiments have been performed with a TNT charge detonated at the center of a single room sized space with rigid boundaries. The room has a limited size opening for venting at the ceiling. Numerical simulations of the problem have been performed using AUTODYN Ver. 12.1 and compared with the experimental measurements. Some deviations between the measured pressure and the predicted pressure motivated the present study in an attempt to study the effect of the additional energy released due to the burning of the detonation products reacting with the surrounding oxygen. The study that is described in this paper enhanced our understanding....
-
on blast pressure analysis due to a partially confined explosion i experimental studies
International Journal of Protective Structures, 2011Co-Authors: Idan E Edri, V.r. Feldgun, Z Savir, Yuri S. Karinski, David Z YankelevskyAbstract:This paper presents a first stage of a study aimed at understanding some characteristics of an interior explosion within a room with limited venting. An interior explosion may occur accidentally in ammunition storage, or due to a Terrorist Action, or as a result of a warhead explosion that follows its penetration into a closed space. The full scale experimental study is focusing on a single room sized space with rigid boundaries, at the center of which a TNT charge is detonated. The room has a limited size opening for venting at the ceiling. The effect of the charge size on the blast pressures has been investigated and a new insight with regard to the pressure distribution on the walls as well as the pressure attenuation depending on these parameters has been gained.
V.r. Feldgun - One of the best experts on this subject based on the ideXlab platform.
-
prediction of the quasi static pressure in confined and partially confined explosions and its application to blast response simulation of flexible structures
International Journal of Impact Engineering, 2016Co-Authors: V.r. Feldgun, Yuri S. Karinski, Idan E Edri, David Z YankelevskyAbstract:Abstract The paper aims at understanding some characteristics of an interior explosion within a room with limited venting. Internal explosions may occur as a result of an ammunition storage explosion, or a charge explosion within a room in a Terrorist Action or a warhead explosion following its penetration into a closed space. The paper deals with one of the basic aspects of internal blast – residual blast pressure (gas pressure, quasi-static pressure). The article presents different models for the prediction of the gas pressure. The sensitivity of the gas pressure to the heat capacity ratio and internal energy of explosion is studied. It is demonstrated that the heat capacity ratio has a much stronger effect on the gas pressure than the internal energy of explosion. It is shown that a thermodynamic model based on accounting for the afterburning energy release shows best agreement with experimental data. This method takes into account the variation of the total energy released and the heat capacity ratio depending on the ratio between the charge weight divided by the confined air volume. It is demonstrated that the proposed simplified approach based on using the developed gas pressure as well as on the Bernoulli equation for the quasi-stationary phase is well suited for simulation of partially confined explosions and properly describes the pressure relief and gas outflow from the vented room. The developed gas pressure can be successfully applied to simulation of confined blast response of flexible structures. An analytical solution of the SDOF blast response of a flexible structure is implemented. It is shown that the simplified approach based on the quasi-static gas pressure properly describes the elastic-plastic shell behaviour. It shows a good agreement with test data and with a solution using pressure time history obtained by AUTODYN simulation.
-
on blast pressure analysis due to a partially confined explosion iii afterburning effect
International Journal of Protective Structures, 2012Co-Authors: Idan E Edri, V.r. Feldgun, Yuri S. Karinski, David Z YankelevskyAbstract:This paper aims at extending our understanding with regard to some characteristics of an interior explosion within a room with limited venting. An interior explosion may be the result of an ammunition storage explosion, or an explosive charge as part of a Terrorist Action or a warhead explosion that follows its penetration into a closed space in a military Action. Full scale experiments have been performed with a TNT charge detonated at the center of a single room sized space with rigid boundaries. The room has a limited size opening for venting at the ceiling. Numerical simulations of the problem have been performed using AUTODYN Ver. 12.1 and compared with the experimental measurements. Some deviations between the measured pressure and the predicted pressure motivated the present study in an attempt to study the effect of the additional energy released due to the burning of the detonation products reacting with the surrounding oxygen. The study that is described in this paper enhanced our understanding....
-
on blast pressure analysis due to a partially confined explosion i experimental studies
International Journal of Protective Structures, 2011Co-Authors: Idan E Edri, V.r. Feldgun, Z Savir, Yuri S. Karinski, David Z YankelevskyAbstract:This paper presents a first stage of a study aimed at understanding some characteristics of an interior explosion within a room with limited venting. An interior explosion may occur accidentally in ammunition storage, or due to a Terrorist Action, or as a result of a warhead explosion that follows its penetration into a closed space. The full scale experimental study is focusing on a single room sized space with rigid boundaries, at the center of which a TNT charge is detonated. The room has a limited size opening for venting at the ceiling. The effect of the charge size on the blast pressures has been investigated and a new insight with regard to the pressure distribution on the walls as well as the pressure attenuation depending on these parameters has been gained.
Yuri S. Karinski - One of the best experts on this subject based on the ideXlab platform.
-
prediction of the quasi static pressure in confined and partially confined explosions and its application to blast response simulation of flexible structures
International Journal of Impact Engineering, 2016Co-Authors: V.r. Feldgun, Yuri S. Karinski, Idan E Edri, David Z YankelevskyAbstract:Abstract The paper aims at understanding some characteristics of an interior explosion within a room with limited venting. Internal explosions may occur as a result of an ammunition storage explosion, or a charge explosion within a room in a Terrorist Action or a warhead explosion following its penetration into a closed space. The paper deals with one of the basic aspects of internal blast – residual blast pressure (gas pressure, quasi-static pressure). The article presents different models for the prediction of the gas pressure. The sensitivity of the gas pressure to the heat capacity ratio and internal energy of explosion is studied. It is demonstrated that the heat capacity ratio has a much stronger effect on the gas pressure than the internal energy of explosion. It is shown that a thermodynamic model based on accounting for the afterburning energy release shows best agreement with experimental data. This method takes into account the variation of the total energy released and the heat capacity ratio depending on the ratio between the charge weight divided by the confined air volume. It is demonstrated that the proposed simplified approach based on using the developed gas pressure as well as on the Bernoulli equation for the quasi-stationary phase is well suited for simulation of partially confined explosions and properly describes the pressure relief and gas outflow from the vented room. The developed gas pressure can be successfully applied to simulation of confined blast response of flexible structures. An analytical solution of the SDOF blast response of a flexible structure is implemented. It is shown that the simplified approach based on the quasi-static gas pressure properly describes the elastic-plastic shell behaviour. It shows a good agreement with test data and with a solution using pressure time history obtained by AUTODYN simulation.
-
on blast pressure analysis due to a partially confined explosion iii afterburning effect
International Journal of Protective Structures, 2012Co-Authors: Idan E Edri, V.r. Feldgun, Yuri S. Karinski, David Z YankelevskyAbstract:This paper aims at extending our understanding with regard to some characteristics of an interior explosion within a room with limited venting. An interior explosion may be the result of an ammunition storage explosion, or an explosive charge as part of a Terrorist Action or a warhead explosion that follows its penetration into a closed space in a military Action. Full scale experiments have been performed with a TNT charge detonated at the center of a single room sized space with rigid boundaries. The room has a limited size opening for venting at the ceiling. Numerical simulations of the problem have been performed using AUTODYN Ver. 12.1 and compared with the experimental measurements. Some deviations between the measured pressure and the predicted pressure motivated the present study in an attempt to study the effect of the additional energy released due to the burning of the detonation products reacting with the surrounding oxygen. The study that is described in this paper enhanced our understanding....
-
on blast pressure analysis due to a partially confined explosion i experimental studies
International Journal of Protective Structures, 2011Co-Authors: Idan E Edri, V.r. Feldgun, Z Savir, Yuri S. Karinski, David Z YankelevskyAbstract:This paper presents a first stage of a study aimed at understanding some characteristics of an interior explosion within a room with limited venting. An interior explosion may occur accidentally in ammunition storage, or due to a Terrorist Action, or as a result of a warhead explosion that follows its penetration into a closed space. The full scale experimental study is focusing on a single room sized space with rigid boundaries, at the center of which a TNT charge is detonated. The room has a limited size opening for venting at the ceiling. The effect of the charge size on the blast pressures has been investigated and a new insight with regard to the pressure distribution on the walls as well as the pressure attenuation depending on these parameters has been gained.
Z Savir - One of the best experts on this subject based on the ideXlab platform.
-
on blast pressure analysis due to a partially confined explosion i experimental studies
International Journal of Protective Structures, 2011Co-Authors: Idan E Edri, V.r. Feldgun, Z Savir, Yuri S. Karinski, David Z YankelevskyAbstract:This paper presents a first stage of a study aimed at understanding some characteristics of an interior explosion within a room with limited venting. An interior explosion may occur accidentally in ammunition storage, or due to a Terrorist Action, or as a result of a warhead explosion that follows its penetration into a closed space. The full scale experimental study is focusing on a single room sized space with rigid boundaries, at the center of which a TNT charge is detonated. The room has a limited size opening for venting at the ceiling. The effect of the charge size on the blast pressures has been investigated and a new insight with regard to the pressure distribution on the walls as well as the pressure attenuation depending on these parameters has been gained.