11 results about "TNT equivalent" patented technology

The invention discloses explosion test equipment with a high safety coefficient, and particularly relates to the technical field of explosion test devices.The explosion test equipment comprises a safety test stand, a supervision mechanism is arranged at the top of the safety test stand, and a shield assembly is arranged on the outer side of the supervision mechanism; the monitoring mechanism comprises two sliding base grooves, fixing screw rods are welded in the sliding base grooves, translation bases are arranged in the sliding base grooves, the width of the translation bases is matched with the width of the sliding base grooves, the thickness of the translation bases is matched with the depth of the sliding base grooves, and the translation bases are slidably connected with the sliding base grooves. According to the explosion experiment device, the monitoring mechanism is arranged, so that the explosion condition can be remotely observed, the problem that a worker needs to observe the explosion condition around the explosion experiment device is avoided, the observation mode is extremely safe, the life safety of the worker cannot be endangered even if the explosion equivalent is too large, and the safety is relatively high.

The application provides a double-V lightning protection structure and a manufacturing method thereof, and relates to the field of lightning protection structures.The lightning protection structure comprises two groups of connecting bases symmetrically arranged at the bottom of a fixed base; and a blast-facing main explosion-proof plate is arranged at the bottom of the fixed base. The blast-facing main explosion-proof plate is arranged to finely realize the defense function of each functional layer of the lightning protection structure composed of the blast-facing main explosion-proof layer, the pressure relief gap and the back functional layer. Even after being subjected to a higher TNT equivalent explosion impact, the back functional layer can still maintain good integrity, thereby solving the problems that the single-layer deep V structure has a large size in the height direction, which increases the gravity center of the whole vehicle and affects the high-speed driving safety and the passability on complex roads. Moreover, when the commonly used lightning protection structure is installed, it is impossible to determine whether the whole lightning protection structure is firmly fixed and whether the lightning protection structure is installed at the specified position.

This invention discloses a TNT equivalent evaluation method based on implosion quasi-static pressure. It proposes a design method for an implosion test chamber, in which an implosion test is performed on the explosive under test. The TNT equivalent of the explosive is then evaluated based on the measured peak quasi-static pressure, ensuring that the measured quasi-static pressure is approximately equal to the total energy released by the explosion of the explosive. The TNT equivalent obtained from this evaluation is scientifically reasonable, with high testing accuracy and good result stability. Furthermore, the test chamber contains sufficient oxygen to ensure the complete reaction of non-ideal explosives that require oxygen for the reaction. Therefore, this invention is not only applicable to the testing of ideal explosives but also to the testing of non-ideal explosives such as aluminum-containing explosives, thermobaric explosives, and thermobaric charges that require oxygen for the reaction.

The invention provides a method for determining gas explosion parameters based on explosion traces and related equipment. The method comprises the following steps: acquiring a target drawing of a target building with gas explosion; segmenting the target drawing by using a pre-trained image segmentation model to obtain a building structure of the target building, and constructing a three-dimensional model of the target building according to the building structure; obtaining an explosion trace graph, determining the number of position points according to the explosion trace graph, and determining the damage grade and the maximum overpressure value range of each position point in a space coordinate system according to the explosion trace graph by using a pre-trained image recognition model; constructing three-dimensional pressure field distribution of gas explosion according to the maximum overpressure value range of each position point; based on the three-dimensional pressure field distribution, the detonation point position and the explosion equivalent of gas explosion are determined.

This invention proposes a method for analyzing the volume change of a mountain and a method for analyzing explosive equivalent. The method utilizes DEM data to establish an initial three-dimensional model of the target mountain; it uses InSAR to acquire at least three pairs of SAR images of the target mountain from different line-of-sight directions, forming at least three interferograms; it reads the coordinate information of each pixel in the difference result corresponding to each interferogram, obtaining three displacement vector matrices for each direction; it calculates the deformation component of each pixel in the spatial rectangular coordinate system for each value in the displacement vector matrix; it establishes a new three-dimensional model of the target mountain based on the deformation component of each pixel in the spatial rectangular coordinate system; and it calculates the difference between the initial three-dimensional model and the new three-dimensional model of the target mountain to obtain the volume change of the target mountain. This invention overcomes the problem of traditional methods failing to clearly distinguish the boundaries of the blast range.

The present invention relates to the field of blasting technology, and discloses a method and system for determining the center of gravity position in combination with dynamic pressure to ensure that the actual damage effect meets expectations. The method includes: determining the expected damage level A and the first initial center of gravity position facing target A; calculating the damage coefficient based on the equivalent TNT equivalent of the current ammunition, the distance between the first initial center of gravity position and target A, the specific impulse, the dynamic pressure, and the positive pressure action time of the ammunition at the target position; calculating the damage coefficient and determining the actual damage level of the current damage coefficient calculation value; judging whether the actual damage level is consistent with the damage level A; if so, determining the first initial center of gravity position as a reasonable position; if not, adjusting the first initial center of gravity position according to the difference between the actual damage level and the expected damage level until the actual damage level is consistent with the expected damage level.

The invention provides an explosion damage simulation method for simultaneous launching and recovery of multiple carriers. A finite element analysis model of the explosion damage of the whole vehicle is established, the TNT equivalent of the explosion of the vehicle is converted, and nonlinear dynamic analysis of the explosion of the single vehicle on the impact damage of the adjacent vehicles is completed; evaluating the survivability of the vehicle in the explosion impact environment of the adjacent vehicle; the method comprises the following steps of: performing nonlinear dynamic analysis on impact damage of different adjacent carriers due to TNT equivalents, wall thicknesses, materials, launching heights and the like of the adjacent carriers, and establishing a relationship among the TNT equivalents of the adjacent carriers, an explosion safety distance, the wall thicknesses and the like in combination with constraint conditions meeting the yield damage tolerance of wall surfaces of the carriers and an acceleration response threshold value of key equipment; according to the method, the superposition relation of the explosion shock wave peak values under various working conditions of simultaneous explosion and non-simultaneous explosion of a plurality of vehicles is analyzed, the rule of influence on the safety of the vehicles is evaluated, and the problems of high cost, high risk, poor repeatability and the like of a ground test are solved.

The present invention provides a method for assessing the damage of a local structure of a hull caused by an underwater explosion, and relates to the technical field of data processing. The method comprises: obtaining underwater explosion working condition parameters, the working condition parameters comprising: charge TNT equivalent and explosion position; obtaining hull structure data; calculating the initial damage degree of the hull under the action of the underwater explosion based on the working condition parameters and the hull structure data, based on an equivalent simulation method; determining a hull area with an initial damage degree greater than a preset damage degree as a key local area; calculating the precise damage degree of the key local area of ​​the hull under the action of the underwater explosion based on the working condition parameters and the structural data of the key local area, based on a finite element analysis method. The present invention can perform a fine finite element analysis on a key local area with a large initial damage degree, improve the refinement and accuracy of the local structure damage assessment, and does not need to simulate the entire hull each time, thereby reducing the complexity and time consumption of the simulation.

The invention relates to the technical field of blasting, and discloses a method and a system for determining the position of a blasting center combined with dynamic pressure so as to ensure that the substantial damage effect meets the expectation. The method comprises the following steps: determining an A damage grade and a first initial explosion center position expected for an A target; the specific impulse, the dynamic pressure and the positive pressure acting time of the ammunition at the target position are calculated according to the equivalent TNT equivalent of the current ammunition and the distance between the first initial explosion center position and the A target; a damage coefficient is calculated, and the substantial damage level of a current damage coefficient calculation value is judged; and judging whether the substantial damage level is consistent with the A damage level, if so, determining the first initial blasting center position as a reasonable position, and if not, adjusting the first initial blasting center position according to a difference value between the substantial damage level and the expected damage level until the substantial damage level is consistent with the expected damage level.

The invention relates to a comprehensive power evaluation method for a low-incidental-damage effect, belongs to the technical field of damage evaluation, and solves the problems that in the prior art, calculation of the damage probability of a heavy metal particle swarm of low-incidental-damage ammunition to a personnel target and research on combined damage of the low-incidental-damage ammunition are lacked. Comprising the following steps: calculating the shock wave damage probability based on the explosion distance and TNT equivalent of the low incidental damage ammunition; the specific kinetic energy of the heavy metal particle swarms is calculated based on the flying angle of the low-incidental-damage ammunition explosion driven particle swarms and the front instantaneous speed of the particle swarms, which are measured by the test; based on the specific kinetic energy of the heavy metal particle swarms, the damage probability of the heavy metal particle swarms is calculated; based on the shock wave damage probability and the heavy metal particle swarm damage probability, a damage effect comprehensive power evaluation result is obtained through calculation. The calculation of the damage probability of the heavy metal particle swarms of the low-incidental-damage ammunition to the personnel target and the comprehensive power evaluation of the multi-damage-element coupling damage effect of the low-incidental-damage ammunition are realized.