CN203310600U - Cylinder-shaped equivalent loading experimental device of non-explosive underwater explosion explosive shock waves - Google Patents

Abstract

The invention relates to a cylindrical non-powder type underwater explosion shock wave equivalent loading experimental device, which relates to an underwater explosion shock wave equivalent loading experimental device, in particular to a cylindrical non-powder type underwater explosion shock wave equivalent loading experimental device. The utility model aims to solve the problems that the explosive-type underwater explosion shock wave loading experiment cannot be generally carried out in the laboratory, and the repetition rate is low and the measurement accuracy is not enough. The main loading water tank and the light gas gun of the utility model are arranged horizontally in a straight line, the head end of the main loading water tank is opposite to the muzzle of the light gas gun, and the piston is installed in the head end of the main loading water tank. The target plate is fixedly installed in the tail end of the main loading water tank, and the outer wall of the main loading water tank is evenly arranged with a plurality of shock wave measuring mechanism installation ports along the length direction of the main loading water tank, and the driving bullet is installed in the muzzle of the light gas gun , two speed measuring mechanisms are installed side by side on the outer wall of the light gas gun. The utility model is used for equivalent loading experiment of underwater explosion shock wave.

Description

A cylindrical non-powder underwater explosion shock wave equivalent loading experimental device

technical field

The utility model relates to an underwater explosion shock wave equivalent loading experiment device, in particular to a cylindrical non-medicine underwater explosion shock wave equivalent loading experiment device.

Background technique

At present, the underwater explosion shock wave loading test for different structures and materials mainly relies on a certain equivalent of explosives to be exploded in water tanks of different volumes. This loading method has high risks, high loading costs, and insufficient test accuracy of experimental data. Disadvantages such as high requirements for experimental qualifications and impossibility of popularization. However, the numerical simulation technology is used to study the underwater explosion shock wave loading of the structure, and its correctness cannot be confirmed due to the lack of necessary experimental verification. The cylindrical non-powder underwater explosion shock wave loading experiment has high repeatability, The required experimental qualifications are low, the operation is simple, the main experimental parameters are accurately measured, and the air-back and water-back target structures can be loaded, etc., which can make the shock wave loading of underwater explosions be carried out on a large scale in the laboratory.

At present, the non-drug underwater explosion shock wave loading device established by the Georgia Institute of Technology in the United States and the University of Cambridge in the United Kingdom has no internal scattering angle structure, but due to the limitation of the caliber of the light gas cannon drive device, it can only load small air-backed structures. ; The non-powder-type underwater explosion shock wave equivalent loading device with scattering angle jointly built by Harvard University and Northwestern University can carry out underwater shock wave loading experiments on slightly larger structures in the laboratory, but because there is a shock wave inside the water tank The small scattering angle can increase the loading area of the test structure, but at the same time reduce the loading peak value of the underwater shock wave, and the generated underwater shock wave peak value is also limited to the range of 60MPa. The existing percussive underwater shock wave equivalent loading devices in China all have the same in-band scattering angle structure as that of Northwestern University in the United States. This device can only carry out low-intensity underwater shock wave loading on the target structure in the air-back environment.

Utility model content

In order to solve the problem that the explosive-type underwater explosion shock wave loading experiment cannot be generally carried out in the laboratory, and the repetition rate is low and the measurement accuracy is not enough, the utility model further proposes a cylindrical non-drug type underwater explosion shock wave equivalent loading experiment device .

The technical solution adopted by the utility model for solving the above-mentioned problems is: the utility model includes a main loading water tank, a light gas gun, a driving bomb, a piston, a test target plate and a set of speed measuring mechanism, the main loading water tank and the light gas gun form a The font is set horizontally, the head end of the main loading water tank is opposite to the muzzle of the light gas gun, the piston is installed in the head end of the main loading water tank, and the test target plate is fixedly installed in the tail end of the main loading water tank. And the surface of the test target plate is perpendicular to the center line of the main loading water tank along the length direction, and the outer wall of the main loading water tank is equipped with a plurality of shock wave measuring mechanism installation ports along the length direction of the main loading water tank, and the driving bomb is installed on In the muzzle of the light gas gun, a set of speed measuring mechanisms are installed side by side on the outer wall of the light gas gun.

The beneficial effects of the utility model are: the utility model is based on the principle of one-dimensional shock wave and the principle of acoustic approximation, and the particles in the water can obtain a certain initial velocity through the impact of the plate to generate underwater shock wave loading. The utility model can perform air back and water back on the target structure High-strength underwater shock wave loading in the environment, and can easily detect the shock wave intensity and the deformation and damage of the loaded structure. The utility model can carry out high-strength underwater explosion shock wave loading experiments within the scope of the laboratory without using explosives. Improve effectiveness and efficiency. The utility model can complete the high-strength underwater shock wave loading of the target structure in the air-back and water-back environments without using explosives. The shock wave intensity implemented by the utility model can reach 300 MPa, which is obviously higher than the existing impact type underwater The shock wave intensity that can be achieved by the equivalent loading device of the explosion shock wave.

Description of drawings

Fig. 1 is a structural schematic diagram of the utility model, and Fig. 2 is a structural schematic diagram after the main loading water tank is installed with a water back auxiliary tank.

Detailed ways

Specific Embodiment 1: This embodiment is described in conjunction with FIG. 1 and FIG. 2. A cylindrical non-drug underwater explosion shock wave equivalent loading experimental device described in this embodiment includes a main loading water tank 1, a light gas cannon 2, a driving Bullet 5, piston 6, test target plate 7 and a set of speed measuring mechanism 3, the main loading water tank 1 and the light gas gun 2 are arranged horizontally in a straight line, the head end of the main loading water tank 1 and the gun of the light gas gun 2 The mouths are opposite, the piston 6 is installed in the head end of the main loading water tank 1, the test target plate 7 is fixedly installed in the tail end of the main loading water tank 1, and the surface of the test target plate 7 is along the edge of the main loading water tank 1. The center line in the length direction is vertical, and the outer wall of the main loading water tank 1 is evenly arranged with a plurality of first shock wave measuring mechanism installation ports 4 along the length direction of the main loading water tank 1, and the driving bullet 5 is installed in the muzzle of the light gas gun 2 , a set of speed measuring mechanism 3 is installed side by side on the outer wall of light gas gun 2.

In this embodiment, the main loading tank 1 can generate an underwater shock wave with a loading peak value of 300 MPa.

In the present embodiment, there is a gap of 30 mm between the head end face of the main loading water tank 1 and the muzzle of the light gas gun 2 .

In this embodiment, the main loading tank 1 is hollow cylindrical; the diameter of the driving bomb 5 is 66 mm, and the material can be aluminum or steel. The thickness of the driving bomb 5 can be determined according to the actual working conditions. When the driving bomb 5 is a 5 mm thick aluminum bomb , the light gas cannon 2 can accelerate the driving bomb 5 to 1500m/s.

Two laser emitters and two laser receivers are installed at the muzzle place of light gas cannon 2, and two laser receivers are connected with counter, when the driving bullet 5 that light gas gun 2 launches flies out of muzzle, driving bullet 5 Block the two laser beams respectively, the counter records the interval time of the components, and divides the distance between the two laser beams by the time recorded by the counter to be the impact velocity of the driving bomb 5 .

When the utility model is used for experiments, a shock wave measurement mechanism is respectively installed on each first shock wave measurement mechanism mounting hole 4, and each shock wave measurement mechanism includes five pressures with a range of 0 to 400 MPa and a shock wave measurement rise time ≤ 4 μs Sensor and five-channel charge amplifier and five-channel oscilloscope.

Specific embodiment two: this embodiment is described in conjunction with Fig. 1 and Fig. 2, a cylindrical non-drug type underwater explosion shock wave equivalent loading experimental device described in this embodiment also includes a water-backed auxiliary cabin 9, a water-backed auxiliary cabin 9 The open end of the main loading water tank 1 is connected with the tail end of the main loading water tank 1 by bolts, and the inner cavity of the water back auxiliary tank 9 communicates with the inner cavity of the main loading water tank 1, and the outer wall of the water back auxiliary tank 9 has a water injection port 10.

The technical effect of this embodiment is: such arrangement enables the utility model to carry out shock wave loading experiment in the water back environment. Other components and connections are the same as those in the first embodiment.

Specific embodiment three: this embodiment is described in conjunction with Fig. 1 and Fig. 2, on the outer wall of the water back sub-chamber 9 of a kind of cylindrical non-drug type underwater explosion shock wave equivalent loading experimental device described in this embodiment A second shock wave measurement mechanism installation opening 13, the bottom of the water back auxiliary tank 9 is provided with a second shock wave measurement mechanism installation opening 13.

The technical effect of this embodiment is: so set, each second shock wave measuring mechanism mounting port 13 is respectively installed with a second shock wave measuring mechanism, and the two second shock wave measuring mechanisms can measure the shock wave passing through the test target plate 7 . Other components and connections are the same as those in the second embodiment.

Specific Embodiment 4: This embodiment is described in conjunction with Fig. 1 and Fig. 2. The outer wall of the piston 6 and the inner side of the main loading water tank 1 of a cylindrical non-drug underwater explosion shock wave equivalent loading experimental device described in this embodiment A sealing ring 8 is provided between the walls.

The technical effect of this embodiment is: such arrangement ensures the tightness of the inner cavity of the main loading water tank 1 and avoids water leakage of the main loading water tank 1 during the experiment. Other compositions and connections are the same as those in Embodiment 1 or 2.

Specific Embodiment Five: This embodiment is described in conjunction with Fig. 1 and Fig. 2. A cylindrical non-drug underwater explosion shock wave equivalent loading experimental device described in this embodiment also includes two main loading water tank brackets 11, two The main loading water tank brackets 11 are horizontally arranged side by side, and the main loading water tank 1 is fixedly installed on the two main loading water tank brackets 11 .

The technical effect of this embodiment is: such setting prevents the main loading water tank 1 from moving due to impact during the experiment, thereby affecting the experiment effect and the accuracy of the measurement data. Other compositions and connections are the same as those in Embodiment 4.

Specific embodiment six: this embodiment is described in conjunction with Fig. 1, a kind of cylindrical non-drug type underwater explosion shock wave equivalent loading experimental device described in this embodiment also includes a light gas cannon bracket 12, and the light gas cannon 2 is fixedly installed on a light gas cannon On the air cannon support 12.

The technical effect of this embodiment is: such arrangement makes the light gas cannon 2 not move due to the recoil force, avoiding the damage of the instrument and the injury to personnel. Other components and connections are the same as those in the first embodiment.

Specific Embodiment Seven: This embodiment is described in conjunction with Fig. 1 and Fig. 2. The main loading water tank 1 and the water back auxiliary tank 9 of a cylindrical non-drug underwater explosion shock wave equivalent loading experimental device described in this embodiment are both Made of blackened 42CrMo steel. Other compositions and connections are the same as those in Embodiment 2, 3 or 5.

Embodiment 8: This embodiment is described in conjunction with Fig. 1 and Fig. 2, the inner diameter of the main loading water tank 1 of a kind of cylindrical non-drug type underwater explosion shock wave equivalent loading experimental device described in this embodiment is 66mm, and the main loading The outer diameter of water tank 1 is 78mm, and the internal diameter of water back auxiliary cabin 9 is 66mm, and the outer diameter of water back auxiliary cabin 9 is 78mm. Other compositions and connections are the same as those in Embodiment 7.

working principle

When carrying out the experiment under the condition of air back, the driving bomb 5 is loaded into the muzzle of the light gas gun 2, the piston 6 is loaded into the head end of the main loading water tank 1, the target plate 7 is installed, and the installation port 4 of the shock wave measuring mechanism is installed. Inject water into the main loading water tank 1, after the main loading water tank 1 is filled with water, install a shock wave measuring mechanism on each first shock wave measuring mechanism installation port 4, start the light gas gun 2 to launch the driving bomb 5, The impact velocity of the driving bullet 5 is read by the two speed measuring mechanisms 3, and the shock wave loading history measured by each shock wave measuring mechanism is stored, and an experiment is completed so far.

When carrying out the experiment under the water back situation, the driving bomb 5 is packed into the muzzle of the light gas gun 2, the piston 6 is packed into the head end of the main loading water tank 1, the target plate 7 is installed, and the water back auxiliary cabin 9 is installed. At the tail end of the main loading water tank 1, water is injected into the water back auxiliary tank 9 from the water injection port 10, and water is injected into the main loading water tank 1 through the installation port 4 of the first shock wave measurement mechanism, and the main loading water tank 1 is filled with water Finally, install a shock wave measuring mechanism respectively on each first shock wave measuring mechanism installation port 4 and the second shock wave measuring mechanism mounting port 13, start the light gas cannon 2 to launch the driving bullet 5, and read the driving force through the two speed measuring mechanisms 3. The impact velocity of the projectile 5 stores the shock wave loading process measured by each shock wave measuring mechanism, and an experiment is completed so far.

Claims (8)

1. A cylindrical non-powder type underwater explosion shock wave equivalent loading experimental device is characterized in that: said a kind of cylindrical non-powder type underwater explosion shock wave equivalent loading experimental device comprises a main loading water tank (1), Light gas cannon (2), driving bomb (5), piston (6), test target plate (7) and a set of speed measuring mechanism (3), the main loading water tank (1) and light gas cannon (2) are in a straight line Type horizontal setting, the head end of the main loading water tank (1) is opposite to the muzzle of the light gas gun (2), the piston (6) is installed in the head end of the main loading water tank (1), and the test target plate ( 7) Fixedly installed in the tail end of the main loading water tank (1), and the surface of the test target plate (7) is perpendicular to the center line of the main loading water tank (1) along the length direction, and the main loading water tank (1) A plurality of first shock wave measuring mechanism mounting ports (4) are evenly distributed along the length direction of the main loading water tank (1) on the outer wall of the tank, and the driving bomb (5) is installed in the muzzle of the light gas gun (2). Mechanism (3) is installed side by side on the outer wall of light gas gun (2). 2. A kind of cylindrical non-powder type underwater explosion shock wave equivalent loading experimental device according to claim 1, it is characterized in that: said a kind of cylindrical non-powder type underwater explosion shock wave equivalent loading experimental device also includes water The back auxiliary tank (9), the open end of the water back auxiliary tank (9) is connected with the tail end of the main loading water tank (1) by bolts, and the inner cavity of the water back auxiliary tank (9) is connected with the main loading water tank (1) ) is communicated with the inner cavity, and the outer sidewall of the water back auxiliary tank (9) has a water injection port (10). 3. according to claim 2, a kind of cylindrical non-medicine type underwater explosion shock wave equivalent loading experimental device is characterized in that: the outer wall of the water back auxiliary cabin (9) is provided with a second shock wave measuring mechanism installation port (13), the bottom of the water back auxiliary cabin (9) is provided with a second shock wave measuring mechanism installation port (13). 4. According to claim 1 or 2, a cylindrical non-powder type underwater explosion shock wave equivalent loading experimental device is characterized in that: between the outer wall of the piston (6) and the inner wall of the main loading water tank (1) A sealing ring (8) is provided between them. 5. according to claim 4, a kind of cylindrical non-drug type underwater explosion shock wave equivalent loading experimental device is characterized in that: said a kind of cylindrical non-drug type underwater explosion shock wave equivalent loading experimental device also includes two A main loading water tank support (11), two main loading water tank supports (11) are horizontally arranged side by side, and the main loading water tank (1) is fixedly installed on the two main loading water tank supports (11). 6. According to claim 1, a kind of cylindrical non-powder type underwater explosion shock wave equivalent loading experimental device is characterized in that: said a kind of cylindrical non-powder type underwater explosion shock wave equivalent loading experimental device also includes light Air cannon support (12), light gas cannon (2) is fixedly installed on the light gas cannon support (12). 7. According to claim 2, 3 or 5, a kind of cylindrical non-powder type underwater explosion shock wave equivalent loading experimental device is characterized in that: the main loading water tank (1) and the water back auxiliary tank (9) are all Made of blackened 42CrMo steel. 8. A kind of cylindrical non-powder type underwater explosion shock wave equivalent loading experimental device according to claim 7, is characterized in that: the inner diameter of the main loading water tank (1) is 66mm, and the outer diameter of the main loading water tank (1) Diameter is 78mm, and the inner diameter of water back auxiliary cabin (9) is 66mm, and the outer diameter of water back auxiliary cabin (9) is 78mm.

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