阅读说明：本技术 测量砂爆比冲分布及其大小的新型装置 (Novel device for measuring sand-blast specific impulse distribution and size thereof ) 是由 赵振宇 周贻来 卢天健 任建伟 陈韦杰 张杜江 于 2020-12-15 设计创作，主要内容包括：本发明提供了一种测量砂爆比冲分布及其大小的新型装置,包括横梁、垫板、立柱、纵梁、配重、冲量捕捉器、压板、底板,其中,底板通过底座固定,冲量捕捉器通过两端压板固定在底板中央,压板约束冲量捕捉器转动；冲量捕捉器两侧设置有配重块；所述的底座包括由横梁和纵梁组成的主体框架,主体框架下方设置有若干立柱,每个立柱底部设置有垫板。本发明可循环使用,装置结构简单,易于加工制造,成本较低,可以通过调节冲量捕捉器距地面的高度及其的分布密度来控制测量砂爆冲量的范围和精度。(The invention provides a novel device for measuring sand-blast specific impulse distribution and size thereof, which comprises a cross beam, a base plate, an upright post, a longitudinal beam, a counterweight, an impulse catcher, a pressing plate and a bottom plate, wherein the bottom plate is fixed through a base; the two sides of the impulse catcher are provided with balancing weights; the base comprises a main body frame consisting of cross beams and longitudinal beams, a plurality of stand columns are arranged below the main body frame, and a base plate is arranged at the bottom of each stand column. The device can be recycled, has simple structure, easy processing and manufacturing and lower cost, and can control the range and the precision of the measured sand blast impulse by adjusting the height of the impulse catcher from the ground and the distribution density of the impulse catcher.)

1. The utility model provides a measure sand and explode specific impulse and distribute and novel device of its size which characterized in that: the device comprises a cross beam, a base plate, an upright post, a longitudinal beam, a balance weight, an impulse catcher, a pressing plate and a bottom plate, wherein the bottom plate is fixed through a base, the impulse catcher is fixed in the center of the bottom plate through the pressing plates at two ends, and the pressing plates restrict the impulse catcher to rotate; the two sides of the impulse catcher are provided with balancing weights; the base comprises a main body frame consisting of cross beams and longitudinal beams, a plurality of stand columns are arranged below the main body frame, and a base plate is arranged at the bottom of each stand column.

2. The novel device for measuring the sand-blast specific impulse distribution and the size thereof according to claim 1, is characterized in that: the stand be extending structure, through adjustment stand length control impulse catcher and ground interval.

3. The novel device for measuring the sand-blast specific impulse distribution and the size thereof according to claim 1, is characterized in that: the cross beam, the longitudinal beam and the bottom plate are reinforced through angle ribs.

4. The novel device for measuring the sand-blast specific impulse distribution and the size thereof according to claim 1, is characterized in that: the pressure plate and the impulse catcher are fixed with the bottom plate through fixing screws, and the fixing screws restrain the translation of the impulse catcher.

Technical Field

The invention relates to the technical field of structural protection, in particular to a novel device for measuring sand-blast specific impulse distribution and size thereof.

Background

With the escalation of local area arming events, the security threats faced by armored vehicles are increasing. Shallow explosives and mines are major threats to the armored vehicles in military conflict areas, causing casualties and body damage. Due to the covering effect of shallow-buried sandy soil particles, the load form and the destructive capacity generated by the shallow-buried explosive explosion are greatly different from those of common explosion shock waves. In order to effectively reduce the damage of the shallow-buried explosive to the vehicle body and the damage to passengers, it is necessary to understand the evolution process and the action mechanism of the shallow-buried explosive explosion load.

Grujicic et al have assembled one set of vertical momentum measuring device, place fixed momentum capture detection device above the target plate promptly, connect detection device and target plate through perpendicular guide rail. When the shallow-buried explosive explodes, the detonation load is loaded on the target plate, the target plate generates vertical upward displacement, the displacement is captured by the detection device, and the impulse generated by the sand explosion load is reversely pushed out by the displacement. As a common measurement device for impact dynamics, a Hopkinson pressure bar (also known as Kolsky bar) is widely used to determine the mechanical behavior of solid materials under a punching load. Clarke, Rigby and the like arrange Hopkinson pressure bar arrays, respectively measure the stress change of each bar under the detonation load, and carry out interpolation calculation among the bars according to an interpolation method, thereby obtaining the space and time distribution rule of the detonation load impulse on the surface of the target plate. Denefel et al introduced a novel device for measuring the spatial distribution of detonation load momentum, namely a multi-ring nesting device, which calculated the rising velocity of each ring by measuring the rising displacement of the ring at a certain time, and then found the momentum distributed on the ring area. In order to test the applicability of the device, the Denefeld and the like perform related sand blasting tests, respectively measure the impulse distribution of sand blasting loads under different geological parameters such as sand type, explosive burial depth, humidity and the like, compare the measured result with numerical simulation, and make the two well matched.

However, the above sand blasting impulse distribution measuring devices have several major problems, one is that the measuring devices are complex, difficult to process and manufacture and high in cost; secondly, the testing device is not easy to build, all parts are required to be mutually cooperated, and once a certain link has a problem, the measurement fails; meanwhile, the measuring devices are designed for laboratories, and are not necessarily applicable to some large-equivalent sand blasting impulse distribution tests. Aiming at the problem, the invention provides a novel device for measuring the sand-blast specific impulse distribution and the size thereof.

Disclosure of Invention

The invention aims to solve the problems in the prior art, provides a novel device for measuring the sand-blast specific impulse distribution and the size thereof, which can be recycled, has simple structure, easy processing and manufacturing and lower cost, and can control the range and the precision of the measured sand-blast specific impulse by adjusting the height of the impulse catcher from the ground and the distribution density of the impulse catcher.

The device comprises a cross beam, a base plate, an upright post, a longitudinal beam, a balance weight, an impulse catcher, a pressing plate and a bottom plate, wherein the bottom plate is fixed through a base; the two sides of the impulse catcher are provided with balancing weights; the base comprises a main body frame consisting of cross beams and longitudinal beams, a plurality of stand columns are arranged below the main body frame, and a base plate is arranged at the bottom of each stand column.

The improved structure is characterized in that the upright post is of a telescopic structure, and the distance between the impulse catcher and the ground is controlled by adjusting the length of the upright post.

The improved structure is characterized in that the cross beam, the longitudinal beam and the bottom plate are reinforced through angle ribs.

The impulse catcher is characterized in that the pressing plate and the impulse catcher are fixed with the bottom plate through fixing screws, and the fixing screws restrain the translation of the impulse catcher.

The invention has the beneficial effects that:

1. provides a device for measuring sand-blast specific impulse distribution and size thereof, which can be recycled;

2. the device has simple structure, easy processing and manufacturing and lower cost;

3. the impulse catcher can be installed and replaced according to the test requirement, and is convenient and quick;

4. the range and the precision of the sand blasting impulse can be controlled and measured by adjusting the height of the impulse catcher from the ground and the distribution density of the impulse catcher;

5. the device is easy to build and can be used for measuring the specific impulse distribution and the size of the large equivalent sand blasting.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a novel device for measuring the specific impulse distribution and size of sand;

FIG. 2 is a front view of a novel apparatus for measuring sand blast specific impulse distribution and its size;

FIG. 3 is a left side view of a novel apparatus for measuring sand blast specific impulse distribution and its size;

fig. 4 is a top view of a novel apparatus for measuring sand specific impulse distribution and its size.

Detailed Description

The invention will be further explained with reference to the drawings.

The structure of the invention is shown in figures 1 to 4, and comprises a cross beam 1, a base plate 2, a vertical column 3, a longitudinal beam 4, a counterweight 5, an impulse catcher 6, a pressing plate 7, a fixing bolt 8, an angle rib 9 and a bottom plate 10.

The specific functions of each part are as follows:

the beam 1: is connected with the bottom plate 10 and the longitudinal beam 4 and is used for supporting the bottom plate;

the backing plate 2: is connected with the upright post 3 and is used for increasing the contact area of the upright post 3 and the ground and ensuring that the device cannot sink;

column 3: the impact catcher is connected with the base plate 2 and the longitudinal beam 4 and is used for supporting the cross beam and the longitudinal beam and adjusting the height of the impact catcher from the ground;

longitudinal beam 4: connected with the upright 3 and the bottom plate 10 for supporting the bottom plate;

and (5) counterweight: the balance weight is placed on the bottom plate and used for fixing the measuring device, and balance weights with different masses can be placed according to the equivalent weight of the explosive;

impulse catcher 6: the specific impulse distribution and the size are calculated through the deformation of the impulse catcher after the explosive is detonated, and the range and the precision of the measured sand blasting impulse can be controlled through adjusting the height of the impulse catcher 6 from the ground and the distribution density of the impulse catcher before the explosive is detonated. According to the test requirement, the size and the material of the impulse catcher 6 can be adjusted to achieve a better test effect;

and (3) pressing a plate 7: the impulse catcher is arranged at two ends above the impulse catcher and used for fixing the impulse catcher and restricting the impulse catcher to rotate;

fixing the bolt 8: the device is used for connecting the pressing plate, the impulse catcher and the bottom plate and restraining the translation of the impulse catcher;

the angle rib 9: the transverse longitudinal beam and the bottom plate are connected, so that the stability of the whole measuring device is improved;

bottom plate 10: used for placing the impulse catcher and the counterweight.

During test measurement, the device is placed right above the shallow-buried explosive, and the specific impact distribution of the sand blasting load and the size of the specific impact distribution are calculated by measuring the deformation of the impulse catcher after the explosive is detonated. According to different explosive equivalent weights, weights with different weights are required to be placed on the bottom plate. Before detonation, the range and the precision of the sand blasting impulse can be controlled and measured by adjusting the height of the impulse catcher from the ground and the distribution density of the impulse catcher. According to the test requirement, the size and the material of the impulse catcher can be adjusted to achieve a better test effect.

While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.