CN110132471B - Thin-wall cylindrical explosion shock wave pressure tester and assembling method thereof - Google Patents
Thin-wall cylindrical explosion shock wave pressure tester and assembling method thereof Download PDFInfo
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- CN110132471B CN110132471B CN201910377506.7A CN201910377506A CN110132471B CN 110132471 B CN110132471 B CN 110132471B CN 201910377506 A CN201910377506 A CN 201910377506A CN 110132471 B CN110132471 B CN 110132471B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0052—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to impact
Abstract
The invention discloses a thin-wall cylinder type explosion shock wave pressure tester, which comprises: the device comprises a thin-wall cylinder, a central pillar, an upper gland and a lower gland; the thin-wall cylinder is sleeved on the periphery of the central support, and a deformation space with a set amount is reserved between the thin-wall cylinder and the central support; the upper gland and the lower gland have the same structure, the upper gland is a cylinder with a step-shaped through hole in the center, and the large open ends of the upper gland and the lower gland are respectively sleeved at the two ends of the thin-wall cylinder; the centers of two ends of the central pillar are respectively provided with a threaded counter bore along the axial direction; at one end of the thin-wall cylinder connected with the upper gland, the screw end of a fastening bolt penetrates through the upper gland and then is in threaded connection with the threaded counter bore on the central strut, and the upper gland, the thin-wall cylinder and the central strut are pressed and fixed; and at the end of the thin-wall cylinder connected with the lower gland, the nut end of the fastening screw penetrates through the lower gland and then is in threaded connection with the threaded counter bore on the central pillar, so that the lower gland, the thin-wall cylinder and the central pillar are pressed and fixed.
Description
Technical Field
The invention relates to the field of impact detection, in particular to a thin-wall cylindrical explosion shock wave pressure tester and an assembly method thereof.
Background
The damage effect of the explosive after explosion on the surroundings is mainly reflected in the damage of the blast wave generated by explosion on the target object except the damage of the shrapnel. In order to evaluate the damage effect of explosive explosion on a target, firstly, the law of shock wave pressure during explosive explosion is researched, and the explosion power is evaluated according to the attenuation of the overpressure peak value of the shock wave along with the distance and the attenuation law of the shock wave at a certain point along with the time; and secondly, directly researching the dynamic response and the damage degree of the action target under the impact load to simulate the damage degree of the target to evaluate the explosive power.
The traditional electric measuring system for detecting the explosive blast shock wave pressure is complex, a certain damage can be caused to the measuring system due to the destructive effect of the shock wave, and the components in the middle of the measuring system, such as a pressure sensor, are expensive, so that the cost of the impact measuring work is increased; meanwhile, the conventional test of the simulation target is divided into two types: the biological evaluation method and the structural damage evaluation method have the advantages that the cost is high, the damage effect can be obtained only by carrying out pathological analysis on organisms, and in the structural damage evaluation method, a simulation target is deformed or damaged under the action of explosion and cannot be reused frequently, so that great waste is caused. In view of the above-mentioned limitations of both methods for testing explosive blast pressure. Therefore, it is necessary to select a material and structure that is reasonably cost effective to evaluate the explosive power and the destructive effect.
Disclosure of Invention
In view of the above, the invention provides a thin-wall cylindrical explosion shock wave pressure tester and an assembly method thereof, which have simple structures and can accurately evaluate the power and damage effect of explosion shock waves according to the deformation of a thin-wall cylinder.
The technical scheme of the tester provided by the invention is as follows: a thin-walled cylindrical detonation shock wave pressure tester, comprising: the device comprises a thin-wall cylinder, a central pillar, an upper gland and a lower gland; the thin-wall cylinder is sleeved on the periphery of the central support, and a deformation space with a set amount is reserved between the thin-wall cylinder and the central support; the upper gland and the lower gland have the same structure, the upper gland is a cylinder with a step-shaped through hole in the center, and the large open ends of the upper gland and the lower gland are respectively sleeved at the two ends of the thin-wall cylinder; the centers of two ends of the central pillar are respectively provided with a threaded counter bore along the axial direction; at one end of the thin-wall cylinder connected with the upper gland, the screw end of a fastening bolt penetrates through the upper gland and then is in threaded connection with the threaded counter bore on the central strut, and the upper gland, the thin-wall cylinder and the central strut are pressed and fixed; and at the end of the thin-wall cylinder connected with the lower gland, the nut end of the fastening screw penetrates through the lower gland and then is in threaded connection with the threaded counter bore on the central pillar, so that the lower gland, the thin-wall cylinder and the central pillar are pressed and fixed.
As a preferred scheme, the reducing connection part of the step-shaped through hole in the upper gland is connected by a slope surface.
As a preferred scheme, the center pillar is in a reducing cylinder shape with a thin middle part and thick two ends.
Preferably, the wall thickness of the thin-walled cylinder is a set value.
As a preferred scheme, the two ends of the central pillar are provided with slope sections which are matched with slopes of the stepped through holes in the upper gland and the lower gland.
As a preferred scheme, the slope surface sections at the two ends of the central strut are respectively carved with a V-shaped groove structure.
The technical scheme of the assembling method of the tester of the invention is as follows: the assembling method of thin-wall cylinder type explosion shock wave pressure tester is characterized by that the two ends of the thin-wall cylinder are respectively extruded into V-shaped grooves of two ends of central supporting column by using the slope surfaces of stepped through holes in upper press cover and lower press cover, so that the two ends of the thin-wall cylinder are formed into corrugated form and pressed into the V-shaped grooves of two ends of central supporting column, at the same time, the two ends of the central supporting column are respectively interference-fitted with the stepped through holes in upper press cover and lower press cover, so that the end portions of two ends of the thin-wall cylinder and two ends of the central supporting column can be tightly pressed and fixed, and when it is impacted, two ends of the thin-wall cylinder and two ends of the central supporting column do.
Has the advantages that:
(1) the invention has simple structure, each component adopts common parts, the central pillar is designed into a shape with a thin middle part and thick two ends, thus being beneficial to reserving deformation space for the thin-wall cylinder when the thin-wall cylinder is clamped and sleeved on the central pillar; two ends of the central pillar are respectively provided with a slope surface which shrinks towards the axis, and the slope surface is provided with a V-shaped groove which is beneficial to fixing two ends of the thin-wall cylinder at two ends of the central pillar.
(2) The tester of the invention has convenient assembly and use, reliable test and no influence of climatic conditions; the tester has low cost, and is particularly convenient for pressure testing of dynamic explosion shock waves with a large range of multiple measuring points.
Drawings
FIG. 1 is a schematic diagram of a tester according to the present invention.
FIG. 2 is an assembled view of the tester of the present invention.
FIG. 3 is a cross-sectional view of a tester of the present invention.
Fig. 4 is a view of a center pillar of the present invention, (a) a front view, (b) a sectional view, and (c) a top view.
Fig. 5 is a view of an upper cover (or a lower cover) of the present invention, (a) a front view, (b) a sectional view, and (c) a plan view.
Fig. 6 is a view of a fastening bolt of the present invention, (a) a front view, and (b) a sectional view.
Fig. 7 is a view of the fastening screw of the present invention, (a) a front view, and (b) a sectional view.
Fig. 8 is a thin-walled cylinder of the present invention, (a) a front view before assembly, (b) a front view after assembly, (c) a top view before assembly, and (d) a top view after assembly.
FIG. 9 is a layout diagram of a static explosion test field pressure tester of the present invention.
FIG. 10 is a layout diagram of a pressure tester in a dynamic explosion test field according to the present invention.
Wherein, 1-thin-wall cylinder, 2-central pillar, 3-upper gland, 4-lower gland, 5-fastening bolt and 6-fastening screw
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The embodiment provides the thin-wall cylinder type explosion shock wave pressure tester and the assembling method thereof, the structure is simple, and the power and the damage effect of the explosion shock wave can be accurately evaluated according to the deformation of the thin-wall cylinder.
As shown in fig. 1-8, the tester includes: the structure of the thin-wall cylinder comprises a thin-wall cylinder 1, a central pillar 2, an upper gland 3 and a lower gland 4, wherein the thin-wall cylinder 1 is sleeved on the periphery of the central pillar 2, the upper gland 3 and the lower gland 4 are identical in structure, the gland 3 is introduced as an example, the upper gland 3 is a cylinder with a step-shaped through hole in the center, the reducing connection part of the step-shaped through hole is connected by adopting a slope surface, and the large open ends of the upper gland 3 and the lower gland 4 are respectively sleeved on two ends of the thin-wall cylinder 1; the centers of two ends of the central pillar 2 are respectively provided with a threaded counter bore along the axial direction, at one end of the thin-wall cylinder 1 connected with the upper gland 3, the screw end of a fastening bolt 5 penetrates through the upper gland 3 and then is in threaded connection with the threaded counter bore on the central pillar 2, and the upper gland 3, the thin-wall cylinder 1 and the central pillar 2 are pressed and fixed; at one end of the thin-wall cylinder 1 connected with the lower gland 4, the nut end of the fastening screw 6 penetrates through the lower gland 4 and then is in threaded connection with the threaded counter bore on the central strut 2, and the lower gland 4, the thin-wall cylinder 1 and the central strut 2 are tightly pressed and fixed.
Specifically, the method comprises the following steps: the thin-wall cylinder 1 is made of metal materials with good plasticity, such as aluminum, copper and the like, the wall thickness is preset according to actual conditions, and the thin-wall cylinder is used for meeting engineering requirements of light weight and high strength; the central pillar 2 is made of rigid material, so that a space for the thin-wall cylinder 1 to deform under pressure is conveniently reserved after the central pillar 2 is assembled with the thin-wall cylinder 1, and the central pillar 2 is in a variable diameter cylinder shape with a thin middle part and two thick ends. Meanwhile, two ends of the center pillar 2 are respectively provided with a straight section and a slope section at the outer edge of the two ends in order to be matched with the step-shaped through holes in the upper gland 3 and the lower gland 4, the pillar sections corresponding to the straight sections at the two ends are the maximum diameter section of the center pillar 2, the two ends of the straight section are respectively connected with the slope sections, wherein the slope sections at the two ends of the center pillar 2 are respectively connected with the end surfaces at the two ends of the center pillar, and the slope sections at the two ends are respectively carved with a V-shaped groove structure.
During assembly, the two ends of the thin-wall cylinder 1 are extruded into the V-shaped grooves at the two ends of the central pillar 2 by adopting the slopes of the stepped through holes in the upper gland 3 and the lower gland 4, so that the two ends of the thin-wall cylinder 1 form a fold form and are pressed into the V-shaped grooves at the two ends of the central pillar 2, and meanwhile, the two ends of the central pillar 2 are respectively in interference fit with the stepped through holes in the upper gland 3 and the lower gland 4, so that the end parts at the two ends of the thin-wall cylinder 1 are tightly pressed and fixed with the two ends of the central pillar 2, and the phenomenon that the two ends of the thin-wall cylinder 1 fall off from the two ends of the central pillar 2 when the thin-wall cylinder; the periphery of the nut end of the fastening bolt 5 and the periphery of the fastening screw 6 are respectively provided with more than two straight surfaces, so that the clamping installation of a tool is convenient during the assembly; the screw end of the fastening screw 6 is used for inserting into the base to fix the pressure tester.
Before testing, calibrating the one-to-one correspondence between the deformation of the thin-wall cylinder 1 and the impact of the explosion shock wave according to the set material and the set wall thickness, wherein during testing, when the explosion shock wave acts on the thin-wall cylinder 1, the thin-wall cylinder 1 can generate corresponding deformation, the deformation is larger when the pressure is larger, the maximum deformation at the set position of the thin-wall cylinder 1 is measured to reflect the impact of the explosion shock wave at the specific position, and further the power and the damage effect of the explosion shock wave are accurately evaluated.
As shown in fig. 9, when the static explosive shock wave pressure test is performed, the tester is arranged on a concentric circle with different diameters according to a set test distance interval with an explosive source as a center (explosive point), the tester is vertically inserted into the ground through the rod part of the fastening screw 6 for fixing, the thin-wall cylinder 1 is exposed above the ground, the explosive source is ignited, the explosive shock wave sequentially impacts the tester arranged on the concentric circles with different diameters, the impulse received by different testers is respectively measured, and the power and damage effect of the explosive shock wave are evaluated according to the impulse received by the testers on different concentric circles.
As shown in fig. 10, when a dynamic detonation shock wave pressure test is performed, due to uncertainty of a detonation source falling point (detonation point), a # -shaped grid is used for large-scale layout at an estimated falling point of the detonation source, that is, the tester is arranged on a node of each grid, distances of the testers relative to the detonation point are measured according to actual detonation points after detonation, a detonation shock wave field is obtained, impulses received by different testers are measured respectively, and then the power and damage effects of the detonation shock wave are evaluated according to the impulses received by the testers on different concentric circles.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A thin-walled cylindrical explosive shock wave pressure tester is characterized by comprising: the device comprises a thin-wall cylinder (1), a central strut (2), an upper gland (3) and a lower gland (4); the central strut (2) is arranged into a reducing cylinder with a thin middle part and thick two ends; the thin-wall cylinder (1) is sleeved on the periphery of the central support (2), and a deformation space with a set amount is reserved between the thin-wall cylinder and the central support; the upper gland (3) and the lower gland (4) have the same structure, the upper gland (3) is a cylinder with a step-shaped through hole in the center, and the large open ends of the upper gland (3) and the lower gland (4) are respectively sleeved at the two ends of the thin-wall cylinder (1); the centers of two ends of the central pillar (2) are respectively provided with a threaded counter bore along the axial direction; at one end of the thin-wall cylinder (1) connected with the upper gland (3), the screw end of the fastening bolt (5) penetrates through the upper gland (3) and then is in threaded connection with the threaded counter bore on the central strut (2), and the upper gland (3), the thin-wall cylinder (1) and the central strut (2) are pressed and fixed; at one end of the thin-wall cylinder (1) connected with the lower gland (4), the nut end of the fastening screw (6) penetrates through the lower gland (4) and then is in threaded connection with the threaded counter bore on the central strut (2), and the lower gland (4), the thin-wall cylinder (1) and the central strut (2) are pressed and fixed.
2. The thin-walled cylindrical type detonation shock wave pressure tester of claim 1, characterized in that the reducing connection of the stepped through hole in the upper gland (3) is in slope engagement.
3. The thin-walled cylindrical detonation shock wave pressure tester as claimed in claim 1 characterized in that the wall thickness of the thin-walled cylinder (1) is a set value.
4. The thin-walled cylindrical detonation shock wave pressure tester of claim 1 or 2, characterized in that the central pillar (2) is provided with sloping surface sections at both end portions, which cooperate with the sloping surfaces of the stepped through holes in the upper gland (3) and the lower gland (4).
5. The thin-walled cylindrical type detonation shock wave pressure tester of claim 4, characterized in that the slope surface sections at both ends of the central pillar (2) are engraved with V-shaped groove structures.
6. An assembling method of a thin-wall cylinder type explosion shock wave pressure tester, which uses the pressure tester as claimed in claim 5, characterized in that the slopes of the stepped through holes in the upper gland (3) and the lower gland (4) are respectively adopted to extrude the two ends of the thin-wall cylinder (1) into the V-shaped grooves at the two ends of the central pillar (2), so that the two ends of the thin-wall cylinder (1) form a fold form and are pressed into the V-shaped grooves at the two ends of the central pillar (2), and simultaneously, the two ends of the central pillar (2) are respectively in interference fit with the stepped through holes in the upper gland (3) and the lower gland (4), thereby realizing the compression and fixation of the end parts at the two ends of the thin-wall cylinder (1) and the two ends of the central pillar (2), and avoiding the two ends of the thin-wall cylinder (1) and the two ends of the central pillar (2) from falling off when the.
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| CN201910377506.7A CN110132471B (en) | 2019-05-07 | 2019-05-07 | Thin-wall cylindrical explosion shock wave pressure tester and assembling method thereof |
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| CN110132471B true CN110132471B (en) | 2020-05-08 |
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| CN110987263B (en) * | 2019-11-28 | 2021-12-03 | 北京航星机器制造有限公司 | Impact overload force measuring mechanism and measuring method |
| CN114812902B (en) * | 2022-04-27 | 2023-02-21 | 北京理工大学 | Punching type explosion shock wave impulse tester and layout method thereof |
| CN116183083A (en) * | 2023-03-03 | 2023-05-30 | 西北核技术研究所 | Near-ground omni-directional pressure sensor and shock wave measurement system |
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