A plane distribution of explosive loading method for dynamic load test of protective equipment

Abstract

This invention discloses a planar explosive loading method for dynamic load testing of protective equipment, belonging to the technical field of dynamic load testing of protective equipment. The method includes the following steps: S1: At least one layer of fixed structures is arranged parallel to each other in a test tunnel in front of the protective equipment; S2: Detonating cords are arranged in a reciprocating pattern on each layer of fixed structures, and the detonating cords between adjacent fixed structures are connected end-to-end by overlapping clips to form a multi-layered mesh structure; S3: At least one end of the multi-layered mesh structure is connected to an initiating element. This invention extends the positive pressure application time by changing the number of layers of the fixed structures, the winding spacing D of a single layer of detonating cord 6, or the layer spacing S between adjacent fixed structures, thereby forming a quasi-static or slowly changing dynamic loading that more closely resembles actual combat conditions, thus improving the reliability of the safety performance evaluation of the protective equipment.

Description

Technical Field

[0001] This invention belongs to the field of dynamic load testing technology for protective equipment, and in particular relates to a planar explosive loading method for dynamic load testing of protective equipment. Background Technology

[0002] Current dynamic load performance tests for protective equipment mostly employ point or linear explosive arrangements, resulting in explosive loads exhibiting peak impact characteristics and short durations of positive pressure, making it difficult to simulate the prolonged pressure processes experienced by protective equipment in actual explosions. A key issue in the safety performance evaluation of protective equipment is how to extend the duration of impact loads through reasonable explosive placement, creating quasi-static or slowly varying dynamic loading that more closely resembles real-world combat conditions.

[0003] To address this, a planar explosive loading method for dynamic load testing of protective equipment is proposed to overcome the shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide a planar explosive loading method for dynamic load testing of protective equipment, which solves the problem that existing explosive loads have peak impact characteristics and short positive pressure action time, making it difficult to simulate the long-term pressure process that protective equipment is subjected to in actual explosions.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: A planar explosive loading method for dynamic load testing of protective equipment includes the following steps: S1: At least one layer of fixed structure is set up in parallel in the test tunnel in front of the protective equipment; S2: Each layer of fixed structure is equipped with detonating cords that are arranged in a reciprocating manner. The detonating cords between adjacent fixed structures are connected end to end by overlapping buckles to form a multi-layered mesh structure. S3: At least one end of the multi-layer mesh structure is connected to an initiating element.

[0006] Furthermore, in step S1, the fixing structure includes: multiple expansion hooks embedded in the side wall of the test tunnel, with a first lifting rope and a second lifting rope hanging between the multiple expansion hooks, and the detonating cord being fixed between the first lifting rope and the second lifting rope by a fixing buckle.

[0007] Furthermore, in step S1, the fixed structure has 1-6 layers.

[0008] Furthermore, in step S2, the winding spacing D of the detonating cord on the single-layer fixed structure is the same, and 0.2m≤D≤1m.

[0009] Furthermore, in step S2, the interlayer spacing S of the detonating cord on two adjacent fixed structures is the same, and 0.5m≤S≤2m.

[0010] Furthermore, in step S3, the detonating element is a detonator.

[0011] The planar explosive loading method for dynamic load testing of protective equipment provided by this invention has the following advantages compared with the prior art: 1. This invention extends the duration of positive pressure effect of the explosive load under the same equivalent charge by using a planar placement method with a mesh detonating cord; 2. This invention prolongs the duration of positive pressure by changing the winding spacing D and the interlayer spacing S of the detonating cord; 3. The present invention provides a longer positive pressure application time that is closer to the quasi-static or slowly changing dynamic loading conditions in actual combat, thereby improving the reliability of the safety performance assessment of protective equipment. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0013] Figure 1 This is a diagram showing the arrangement of the present invention; Figure 2 This is a diagram showing the arrangement of the single-layer detonating cord of the present invention; Figure 3 This is a diagram showing the overlap of the detonating cord between adjacent layers in this invention. Figure 4a This is an exploded view diagram based on existing technology. Figure 4b This is an exploded view of the invention.

[0014] In the diagram: 1-Test tunnel; 2-Protective equipment; 3-First hoisting rope; 4-Second hoisting rope; 5-Expansion hook; 6-Detonating cord; 7-Fixing buckle; 8-Overlapping buckle. Detailed Implementation

[0015] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments: like Figure 1-3 As shown, the present invention provides a planar explosive loading method for dynamic load testing of protective equipment, comprising the following steps: S1: At least one layer of fixed structure is set in parallel in the test tunnel 1 in front of the protective equipment 2; S2: Each layer of fixed structure is equipped with detonating cord 6 arranged in a reciprocating manner. The detonating cord 6 between adjacent fixed structures is connected end to end by overlapping buckles 8 to form a multi-layered mesh structure. S3: At least one end of the multi-layer mesh structure is connected to an initiating element.

[0016] In a preferred embodiment, in step S1, the fixing structure includes: a plurality of expansion hooks 5 embedded in the side wall of the test tunnel 1, a first hoisting rope 3 and a second hoisting rope 4 hanging between the plurality of expansion hooks 5, and the detonating cord 6 being fixed between the first hoisting rope 3 and the second hoisting rope 4 by a fixing buckle 7.

[0017] In a preferred embodiment, in step S1, the fixed structure has 1-6 layers.

[0018] In a preferred embodiment, in step S2, the winding spacing D of the detonating cord 6 on the single-layer fixed structure is the same, and 0.2m≤D≤1m.

[0019] In a preferred embodiment, in step S2, the interlayer spacing S of the detonating cord 6 on two adjacent fixed structures is the same, and 0.5m≤S≤2m.

[0020] In a preferred embodiment, in step S3, the detonating element is a detonator.

[0021] As a preferred embodiment, the positive pressure application time can be adjusted by changing the number of layers of the fixed structure, the winding spacing D of the single-layer detonating cord 6, or the layer spacing S of adjacent fixed structures.

[0022] Comparative Example

[0023] like Figure 4a As shown, using the existing point-charge explosion method (2.5kg TNT concentrated charge), the peak overpressure of the shock wave at a distance of 1.5m from the measuring point is about 0.353MPa, and the positive pressure duration is 28.01ms.

[0024] Example 1

[0025] like Figure 4b As shown, using the planar explosive loading method of the present invention (100m detonating cord, equivalent to 2.5kg TNT charge, using a 2-layer fixed structure, D=0.75m, S=1.5m), the peak value of the shock wave overpressure at a distance of 1.5m from the measuring point is about 0.358MPa, and the positive pressure action time is 122.12ms.

[0026] At the same charge (equivalent to 2.5 kg TNT), the planar charge application method of this invention for dynamic load testing of protective equipment significantly extends the positive pressure duration under the same overpressure peak. This loading method more closely resembles the quasi-static or slowly varying dynamic loading conditions in actual combat, and can more realistically simulate the dynamic response of protective equipment under actual explosive impact, providing more accurate test data for the design and performance evaluation of protective equipment.

[0027] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0028] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A planar explosive loading method for dynamic load testing of protective equipment, characterized in that, Includes the following steps: S1: At least one layer of fixed structure is set in parallel in the test tunnel (1) in front of the protective equipment (2); S2: Each fixed structure is provided with detonating cord (6) arranged in a reciprocating manner. The detonating cord (6) between adjacent fixed structures is connected end to end by overlapping buckles (8) to form a multi-layered mesh structure. S3: At least one end of the multi-layer mesh structure is connected to an initiating element.

2. The planar explosive loading method for dynamic load testing of protective equipment according to claim 1, characterized in that, In step S1, the fixing structure includes: multiple expansion hooks (5) embedded in the side wall of the test tunnel (1), a first hoisting rope (3) and a second hoisting rope (4) are hung between the multiple expansion hooks (5), and the detonating cord (6) is fixed between the first hoisting rope (3) and the second hoisting rope (4) by a fixing buckle (7).

3. The planar explosive loading method for dynamic load testing of protective equipment according to claim 1, characterized in that, In step S1, the fixed structure has 1-6 layers.

4. The planar explosive loading method for dynamic load testing of protective equipment according to claim 1, characterized in that, In step S2, the winding spacing D of the detonating cord (6) on the single-layer fixed structure is the same, and 0.2m≤D≤1m.

5. A planar explosive loading method for dynamic load testing of protective equipment according to claim 1, characterized in that, In step S2, the interlayer spacing S of the detonating cord (6) on the two adjacent fixed structures is the same, and 0.5m≤S≤2m.

6. A planar explosive loading method for dynamic load testing of protective equipment according to claim 1, characterized in that, In step S3, the detonating element is a detonator.

Images