CN111337183B - Hopkinson rod-based high-speed water jet generation and load measurement device and system - Google Patents
Hopkinson rod-based high-speed water jet generation and load measurement device and system Download PDFInfo
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- CN111337183B CN111337183B CN202010204461.6A CN202010204461A CN111337183B CN 111337183 B CN111337183 B CN 111337183B CN 202010204461 A CN202010204461 A CN 202010204461A CN 111337183 B CN111337183 B CN 111337183B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
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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
- G01L5/14—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force of explosions; for measuring the energy of projectiles
Abstract
The invention belongs to the technical field of high-speed water jet load experiments, and particularly relates to a high-speed water jet generation and load measurement device and system based on Hopkinson bars. The high-speed water jet generating device can stably and safely generate high-speed water jet, and the axial and radial positioning and clamping devices of the Hopkinson bar measuring element ensure the accurate and stable positioning of the Hopkinson bar measuring element in the stages of installation, debugging and measurement. According to the invention, the Hopkinson bar is used as a measuring element to realize the accurate measurement of the impact load of the high-speed water jet impacting wall surface, and the Hopkinson bar measuring element is made of alloy steel or aluminum alloy, so that the processing is convenient, the cost is extremely low, the strength is high, the measuring range is large, and the accurate measurement of the high-speed impact water jet load is met. The method is mainly used for generating the water jet flow impacting the wall surface of the target plate at a high speed and measuring the high-speed impact load of the jet flow.
Description
Technical Field
The invention belongs to the technical field of high-speed water jet load experiments, and particularly relates to a high-speed water jet generation and load measurement device and system based on Hopkinson bars.
Background
Under the near-field underwater explosion condition of the underwater weapons, the ship structure may have crevasses, and equipment and structures inside the ship can be seriously damaged under the high-speed impact of water flow driven by underwater explosion impact waves and detonation products, so that the research on the high-speed water jet impact load is necessary.
The water hammer load in the early stage of the high-speed water jet load has the characteristics of extremely short pulse width, extremely high peak value and the like, and has very high technical index requirements on the pressure sensor: the sensor must have extremely high frequency response, extremely short response time, extremely large measuring range and extremely high sampling rate, and the piezoelectric type and piezoresistive type wall pressure sensors which are commonly used at present are difficult to meet the measurement of high-speed water jet load.
Disclosure of Invention
The invention aims to provide a high-speed water jet generating and load measuring device based on a Hopkinson bar, which can generate water jet impacting the wall surface of a target plate at high speed and realize accurate measurement of impact load formed by impacting the wall surface by the high-speed water jet.
The purpose of the invention is realized by the following technical scheme: the device comprises a high-speed water jet flow generating device and a Hopkinson bar load measuring device; the Hopkinson bar load measuring device comprises an installation cylinder and a target plate; the lower end of the mounting cylinder is connected with the upper end of the target plate; the target plate is provided with a through hole; a Hopkinson bar measuring element is arranged in the mounting cylinder, a tail sealing plate is arranged at the upper end of the mounting cylinder, and a groove is formed in the tail sealing plate; a pair of strain gauges is symmetrically arranged on two sides of the Hopkinson bar measuring element, the measuring end of the Hopkinson bar measuring element penetrates through a through hole in the target plate and is flush with the target plate, and the upper end of the Hopkinson bar measuring element is in contact with a groove formed in the tail sealing plate; the high-speed water jet generating device comprises a jet generating pipe and a mounting platform; the mounting platform is connected with the target plate through a platform positioning column, and a mounting hole corresponding to the through hole on the target plate is formed in the mounting platform; the upper end of the jet flow generating pipe penetrates through a mounting hole of the mounting platform, the lower end of the jet flow generating pipe is provided with a tail sealing cover, and the tail sealing cover is provided with a wire guide hole; the lower end in the jet flow generating tube is provided with a charge, and a detonating lead of the charge is led out through a lead hole of the tail sealing cover.
The present invention may further comprise:
the mounting cylinder is connected with the target plate through a connecting base; the upper end of the connecting base is connected with the lower end of the mounting cylinder, the lower end of the connecting base is connected with the upper end of the target plate, and a through hole is formed in the connecting base; a connecting base sealing ring is clamped between the connecting base and the target plate, and a Hopkinson bar measuring element sealing ring is arranged at a through hole of the connecting base and the target plate; the measuring end of the Hopkinson bar measuring element sequentially penetrates through the through hole of the connecting base, the Hopkinson bar measuring element sealing ring and the through hole in the target plate.
The invention also aims to provide a high-speed water jet generation and load measurement system based on the Hopkinson bar.
The purpose of the invention is realized by the following technical scheme: the device comprises a high-speed water jet generation and load measurement device based on a Hopkinson bar, a water tank, an experiment bracket, a high-speed camera, a light source and data acquisition equipment; the water tank is arranged in the experiment bracket, and the top of the experiment bracket is provided with an installation barrel positioning flat plate; the high-speed camera and the light source are arranged on two sides of the water tank; the high-speed water jet generation and load measurement device based on the Hopkinson bar comprises a high-speed water jet generation device and a Hopkinson bar load measurement device; the Hopkinson bar load measuring device comprises an installation cylinder and a target plate; the lower end of the mounting cylinder is connected with the upper end of the target plate; the target plate is provided with a through hole; a Hopkinson bar measuring element is arranged in the mounting cylinder, a tail sealing plate is arranged at the upper end of the mounting cylinder, and a groove is formed in the tail sealing plate; a pair of strain gauges is symmetrically arranged on two sides of the Hopkinson bar measuring element, the measuring end of the Hopkinson bar measuring element penetrates through a through hole in the target plate and is flush with the target plate, and the upper end of the Hopkinson bar measuring element is in contact with a groove formed in the tail sealing plate; the high-speed water jet generating device comprises a jet generating pipe and a mounting platform; the mounting platform is connected with the target plate through a platform positioning column, and a mounting hole corresponding to the through hole on the target plate is formed in the mounting platform; the upper end of the jet flow generating pipe penetrates through a mounting hole of the mounting platform, the lower end of the jet flow generating pipe is provided with a tail sealing cover, and the tail sealing cover is provided with a wire guide hole; the lower end in the jet flow generating tube is provided with a charge, and a detonating lead of the charge is led out through a lead hole of the tail sealing cover; the mounting cylinder is fixed on the mounting cylinder positioning flat plate through a clamp; the high-speed water jet generating device is arranged in the water tank, and the water injection height in the water tank is higher than the upper end of the jet generating pipe.
The present invention may further comprise:
the mounting cylinder is connected with the target plate through a connecting base; the upper end of the connecting base is connected with the lower end of the mounting cylinder, the lower end of the connecting base is connected with the upper end of the target plate, and a through hole is formed in the connecting base; a connecting base sealing ring is clamped between the connecting base and the target plate, and a Hopkinson bar measuring element sealing ring is arranged at a through hole of the connecting base and the target plate; the measuring end of the Hopkinson bar measuring element sequentially penetrates through the through hole of the connecting base, the Hopkinson bar measuring element sealing ring and the through hole in the target plate.
The invention has the beneficial effects that:
the invention designs a high-speed water jet generation and load measurement device and system based on a Hopkinson bar, which are mainly used for generating water jet impacting the wall surface of a target plate at a high speed and measuring jet high-speed impact load. The high-speed water jet generating device can stably and safely generate high-speed water jet; the axial and radial positioning and clamping device of the Hopkinson bar measuring element ensures the accurate and stable positioning of the Hopkinson bar measuring element in the installation, debugging and measuring stages. According to the invention, the Hopkinson bar is used as a measuring element to realize the accurate measurement of the impact load of the high-speed water jet impacting wall surface, and the Hopkinson bar measuring element is made of alloy steel or aluminum alloy, so that the processing is convenient, the cost is extremely low, the strength is high, the measuring range is large, and the accurate measurement of the high-speed impact water jet load is met.
Drawings
Fig. 1 is a schematic diagram of a high-speed water jet generation and load measurement device based on a hopkinson bar.
Fig. 2 is a schematic view of a high-velocity water jet generation and load measurement device based on a hopkinson bar at another angle.
Fig. 3 is a front view of a high-speed water jet generation and load measurement device based on a hopkinson bar.
Fig. 4 is a schematic view of a high-speed water jet generating device of the present invention.
FIG. 5 is a schematic view of the connection between the mounting cylinder and the connecting base and target plate.
FIG. 6 is a cross-sectional view showing the connection between the mounting cylinder and the connecting base and the target plate.
Fig. 7 is a schematic view of a hopkinson bar load measuring device of the present invention.
Fig. 8 is a schematic diagram of a hopkinson bar-based high-velocity water jet generation and load measurement system.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention provides a Hopkinson bar-based high-speed water jet generation and load measurement device and system, which are mainly used for generating water jet impacting the wall surface of a target plate at a high speed and measuring jet high-speed impact load. The invention comprises a high-speed water jet generating device 7 for generating a water jet impacting a target plate 804 at a high speed; a Hopkinson bar load measuring device 8 for measuring an impact load formed by the high-speed water jet impacting the target plate 804; the Hopkinson bar mounting and positioning device 9 is used for realizing the accurate and stable positioning of the Hopkinson bar measuring element 801 in the axial direction and the circumferential direction in the installation, debugging and experiment of the Hopkinson bar measuring element 801.
As shown in fig. 1 to 6, a high-speed water jet generation and load measurement device based on a hopkinson rod comprises a high-speed water jet generation device 7 and a hopkinson rod load measurement device 8; the Hopkinson bar load measuring device comprises an installation cylinder 802 and a target plate 804; the lower end of the mounting cylinder is connected with the upper end of the target plate; the target plate is provided with a through hole; a Hopkinson bar measuring element 801 is arranged in the mounting cylinder, a tail sealing plate 905 is arranged at the upper end of the mounting cylinder, and a groove is formed in the tail sealing plate; a pair of strain gauges 807 are symmetrically arranged on two sides of the Hopkinson bar measuring element, the measuring end of the Hopkinson bar measuring element penetrates through a through hole in the target plate and is flush with the target plate, and the upper end of the Hopkinson bar measuring element is in contact with a groove formed in the tail sealing plate; the high-speed water jet generating device comprises a jet generating pipe 701 and a mounting platform 704; the mounting platform is connected with the target plate through a platform positioning column 703, and a mounting hole corresponding to the through hole on the target plate is arranged on the mounting platform; the upper end of the jet flow generating pipe penetrates through a mounting hole of the mounting platform, the lower end of the jet flow generating pipe is provided with a tail sealing cover 702, and the tail sealing cover is provided with a wire guide hole; the lower end in the jet flow generating tube is provided with a charge, and a detonating lead of the charge is led out through a lead hole of the tail sealing cover.
The mounting cylinder is connected with the target plate through a connecting base 803; the upper end of the connecting base is connected with the lower end of the mounting cylinder, the lower end of the connecting base is connected with the upper end of the target plate, and a through hole is formed in the connecting base; a connecting base sealing ring 805 is clamped between the connecting base and the target plate, and a Hopkinson bar measuring element sealing ring 806 is arranged at a through hole of the connecting base and the target plate; the measuring end of the Hopkinson bar measuring element sequentially penetrates through the through hole of the connecting base, the Hopkinson bar measuring element sealing ring and the through hole in the target plate.
As shown in fig. 8, a high-speed water jet generation and load measurement system based on a hopkinson rod comprises a high-speed water jet generation and load measurement device 1 based on a hopkinson rod, a water tank 2, an experiment support 3, a high-speed camera 4, a light source 5 and a data acquisition device 6; the water tank is arranged in the experiment support, and an installation cylinder positioning flat plate 901 is arranged at the top of the experiment support; the high-speed camera and the light source are arranged on two sides of the water tank; the high-speed water jet generation and load measurement device based on the Hopkinson bar comprises a high-speed water jet generation device and a Hopkinson bar load measurement device; the Hopkinson bar load measuring device comprises an installation cylinder and a target plate; the lower end of the mounting cylinder is connected with the upper end of the target plate; the target plate is provided with a through hole; a Hopkinson bar measuring element is arranged in the mounting cylinder, a tail sealing plate is arranged at the upper end of the mounting cylinder, and a groove is formed in the tail sealing plate; a pair of strain gauges is symmetrically arranged on two sides of the Hopkinson bar measuring element, the measuring end of the Hopkinson bar measuring element penetrates through a through hole in the target plate and is flush with the target plate, and the upper end of the Hopkinson bar measuring element is in contact with a groove formed in the tail sealing plate; the high-speed water jet generating device comprises a jet generating pipe and a mounting platform; the mounting platform is connected with the target plate through a platform positioning column, and a mounting hole corresponding to the through hole on the target plate is formed in the mounting platform; the upper end of the jet flow generating pipe penetrates through a mounting hole of the mounting platform, the lower end of the jet flow generating pipe is provided with a tail sealing cover, and the tail sealing cover is provided with a wire guide hole; the lower end in the jet flow generating tube is provided with a charge, and a detonating lead of the charge is led out through a lead hole of the tail sealing cover; the mounting cylinder is fixed on the mounting cylinder positioning flat plate through a clamp; the high-speed water jet generating device is arranged in the water tank, and the water injection height in the water tank is higher than the upper end of the jet generating pipe; the mounting cylinder is connected with the target plate through a connecting base; the upper end of the connecting base is connected with the lower end of the mounting cylinder, the lower end of the connecting base is connected with the upper end of the target plate, and a through hole is formed in the connecting base; a connecting base sealing ring is clamped between the connecting base and the target plate, and a Hopkinson bar measuring element sealing ring is arranged at a through hole of the connecting base and the target plate; the measuring end of the Hopkinson bar measuring element sequentially penetrates through the through hole of the connecting base, the Hopkinson bar measuring element sealing ring and the through hole in the target plate.
Example 1:
the high-speed water jet generating device 7 mainly comprises a jet generating pipe 701, a jet generating pipe tail sealing cover 702, a jet generating pipe mounting platform 704, a platform positioning column 703 and a platform mounting bolt nut 705. The upper end of the jet flow generating pipe 701 is installed in a threaded hole corresponding to the jet flow generating pipe installation platform 704 in a threaded connection mode, and the tail sealing cover 702 of the jet flow generating pipe is installed at the lower end of the jet flow transmitting pipe 701 in a threaded connection mode. The trace charge is arranged at the lower end of the jet transmitting tube, a charge detonating lead is led out from a small hole formed in the tail sealing cover 702 of the jet generating tube, and the interior of the jet transmitting tube is communicated with the water in the water tank due to the existence of the hole formed in the tail sealing cover 702 of the jet transmitting tube. Through holes are formed in the jet flow generating pipe mounting platform 704, the platform positioning column 703 and the target plate 804, and the bolt 705 passes through the through holes of the three, so that the jet flow generating pipe 701 is positioned and mounted. In the experiment, the top end of the jet flow generating pipe 701 is slightly lower than the water surface of the water tank, after the trace charge is detonated, detonation products drive water stored in the jet flow transmitting pipe 701 to be ejected out of the upper end of the jet flow transmitting pipe 701 at a high speed, and water jet with extremely high speed and stable form is formed.
The hopkinson pole load measuring device 8 is composed of a hopkinson pole measuring element 801, a hopkinson pole measuring element mounting cylinder 802, a connecting base 803, a target plate 804, a connecting base sealing ring 805, a hopkinson pole measuring element sealing ring 806 and a strain gauge 807. The Hopkinson bar measuring element 801 passes through a through hole in the center of the connecting base 803 and a Hopkinson bar measuring element sealing ring 806 and is coaxially mounted in the Hopkinson bar measuring element mounting cylinder 802, and a pair of strain gauges 807 are symmetrically adhered to two sides of the Hopkinson bar measuring element 801. Connecting base 803 is installed at hopkinson pole measuring element installation section of thick bamboo 802 lower extreme with bolted connection's mode, and target plate 804 is connected to connecting base 803 with bolted connection's form on, presss from both sides between connecting base 803 and the target plate 804 and puts connecting base sealing washer 805, and hopkinson pole measuring element 801 measuring end flushes with target plate 804.
The high velocity water jet impacting the target plate 804 plane generates a very high peak, very short pulse width water hammer load and a subsequent lower peak, long duration hydrodynamic load. The water hammer load is loaded on the end face of the Hopkinson bar measuring element 801, a one-dimensional longitudinal wave is formed inside the Hopkinson bar measuring element 801, the strain foils 807 symmetrically adhered to the Hopkinson bar measuring element 801 and close to the target plate 804 record time-strain curves of the adhered positions of the strain foils, and then the time-load curves of the water hammer load and the hydrodynamic load of the high-speed water jet impact target plate 804 loaded to the target plate 804 can be obtained.
The hopkinson rod mounting and positioning device 9 is composed of a hopkinson rod measuring element mounting cylinder 802, a mounting cylinder positioning flat plate 901, a mounting cylinder clamp a 903, a mounting cylinder clamp b 902, a hopkinson rod dead axle bolt 904 and a mounting cylinder tail sealing plate 905. The mounting cylinder clamp a 903 is fixed on the mounting cylinder positioning flat plate 901 in a bolt connection mode, the split Hopkinson bar measuring element mounting cylinder 802 penetrates through a circular opening in the center of the positioning flat plate 901, the mounting cylinder clamp b 902 is fixed on the mounting cylinder clamp a 903 in a bolt connection mode, coaxial positioning of the split Hopkinson bar measuring element mounting cylinder 802 and the circular opening of the positioning flat plate 901 is achieved, a split Hopkinson bar fixed shaft bolt 904 penetrates through 4 through holes formed in the circumference of the split Hopkinson bar measuring element mounting cylinder 802, the top end of the bolt is tangent to the split Hopkinson bar measuring element 801, circumferential positioning of the split Hopkinson bar measuring element sealing plate 801 is achieved, the mounting cylinder tail 905 is mounted on the upper portion of the split Hopkinson bar measuring element mounting cylinder 802 in a bolt connection mode, the upper end of the split Hopkinson bar measuring element 801 is in contact with a groove formed in the mounting cylinder tail sealing plate 905, and axial positioning and mounting of the split Hopkinson bar measuring element 801 is achieved.
As shown in fig. 8, the mounting tube positioning plate 901 is fixed on the top platform of the frame-type experimental support 3 in a bolt connection manner, the water tank 2 made of high-transmittance glass is placed on the second platform of the frame-type experimental support 3, the high-speed camera 4 and the direct current light source 5 are placed on two sides of the glass water tank 2, and the direct current light source 5 provides stable background illumination for the high-speed camera 4 to collect optical images. The data acquisition system 6 comprises a strain gauge, a data acquisition interface, an oscilloscope, a computer and other equipment and is used for controlling the acquisition of impact load and optical images.
The invention has the characteristics and advantages that:
the high-speed water jet generating device designed by the invention can stably and safely generate high-speed water jet; the Hopkinson bar is used as a measuring element to realize the accurate measurement of the impact load of the high-speed water jet impacting the wall surface; the axial and radial positioning and clamping devices of the Hopkinson bar measuring element are designed, so that the accurate and stable positioning of the Hopkinson bar measuring element in the stages of installation, debugging and measurement is ensured; the Hopkinson bar measuring element is made of alloy steel or aluminum alloy, is convenient to machine, low in cost, high in strength and large in measuring range, and meets the requirement for accurate measurement of high-speed impact water jet load.
The experimental operation flow of the high-speed water jet generation and load measurement system based on the Hopkinson bar designed by the invention is as follows:
(1) in the experimental environment illustrated in fig. 5, the high-speed water jet generation and load measurement device 1 is assembled according to fig. 1 to 4, a mounting tube positioning plate 901 on the experimental device is fixed on a top platform of the frame-type experimental support 3 in a bolt connection manner, the water tank 2 is placed on a second platform of the frame-type experimental support 3, and the water filling height of the water tank is slightly higher than the water outlet of the jet generation tube 701.
(2) Adjusting the position of the direct current light source 5; the shooting parameters of the high-speed camera 4 and the height of the axis of the lens are adjusted, so that the height of the axis of the lens and the height of the light source are slightly higher than the height between the water surface and the target plate 804, and the high-speed camera 4 can capture a complete optical image of high-speed water jet ejected and impacting the target plate 804.
(3) A micro-equivalent detonation source is loaded at the bottom of the jet flow generating tube 701, and a detonation lead is led out from a small hole formed in a tail sealing cover of the jet flow generating tube and is connected to detonation equipment.
(4) And joint adjustment is carried out on the data acquisition equipment 6 and the high-speed camera 4, so that the normal work of the synchronous trigger system is ensured.
(5) The trace explosive-filled target plate detonation method comprises the steps that a trace explosive-filled detonation source, a high-speed camera 4 and a data acquisition device 5 are synchronously triggered, detonation products after detonation of the detonation source drive water in a jet emission tube 701 to generate a high-speed water jet impact target plate 804, the data acquisition device 6 records water hammer load and later-period stable hydrodynamic load of the high-speed water jet impact target plate 804, and the high-speed camera 4 records optical images of the high-speed water jet impact target plate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 (2)
1. The utility model provides a high-speed water jet takes place and load measurement device based on hopkinson pole which characterized in that: the device comprises a high-speed water jet flow generating device and a Hopkinson bar load measuring device; the Hopkinson bar load measuring device comprises an installation cylinder and a target plate; the lower end of the mounting cylinder is connected with the upper end of the target plate; the target plate is provided with a through hole; a Hopkinson bar measuring element is arranged in the mounting cylinder, a tail sealing plate is arranged at the upper end of the mounting cylinder, and a groove is formed in the tail sealing plate; a pair of strain gauges is symmetrically arranged on two sides of the Hopkinson bar measuring element, the measuring end of the Hopkinson bar measuring element penetrates through a through hole in the target plate and is flush with the target plate, and the upper end of the Hopkinson bar measuring element is in contact with a groove formed in the tail sealing plate; the high-speed water jet generating device comprises a jet generating pipe and a mounting platform; the mounting platform is connected with the target plate through a platform positioning column, and a mounting hole corresponding to the through hole on the target plate is formed in the mounting platform; the upper end of the jet flow generating pipe penetrates through a mounting hole of the mounting platform, the lower end of the jet flow generating pipe is provided with a tail sealing cover, and the tail sealing cover is provided with a wire guide hole; the lower end in the jet flow generating tube is provided with a charge, and a detonating lead of the charge is led out through a lead hole of the tail sealing cover; the mounting cylinder is connected with the target plate through a connecting base; the upper end of the connecting base is connected with the lower end of the mounting cylinder, the lower end of the connecting base is connected with the upper end of the target plate, and a through hole is formed in the connecting base; a connecting base sealing ring is clamped between the connecting base and the target plate, and a Hopkinson bar measuring element sealing ring is arranged at a through hole of the connecting base and the target plate; the measuring end of the Hopkinson bar measuring element sequentially penetrates through the through hole of the connecting base, the Hopkinson bar measuring element sealing ring and the through hole in the target plate.
2. A high-speed water jet generation and load measurement system based on Hopkinson bars is characterized in that: the device comprises a high-speed water jet generation and load measurement device based on a Hopkinson bar, a water tank, an experiment bracket, a high-speed camera, a light source and data acquisition equipment; the water tank is arranged in the experiment bracket, and the top of the experiment bracket is provided with an installation barrel positioning flat plate; the high-speed camera and the light source are arranged on two sides of the water tank; the high-speed water jet generation and load measurement device based on the Hopkinson bar comprises a high-speed water jet generation device and a Hopkinson bar load measurement device; the Hopkinson bar load measuring device comprises an installation cylinder and a target plate; the lower end of the mounting cylinder is connected with the upper end of the target plate; the target plate is provided with a through hole; a Hopkinson bar measuring element is arranged in the mounting cylinder, a tail sealing plate is arranged at the upper end of the mounting cylinder, and a groove is formed in the tail sealing plate; a pair of strain gauges is symmetrically arranged on two sides of the Hopkinson bar measuring element, the measuring end of the Hopkinson bar measuring element penetrates through a through hole in the target plate and is flush with the target plate, and the upper end of the Hopkinson bar measuring element is in contact with a groove formed in the tail sealing plate; the high-speed water jet generating device comprises a jet generating pipe and a mounting platform; the mounting platform is connected with the target plate through a platform positioning column, and a mounting hole corresponding to the through hole on the target plate is formed in the mounting platform; the upper end of the jet flow generating pipe penetrates through a mounting hole of the mounting platform, the lower end of the jet flow generating pipe is provided with a tail sealing cover, and the tail sealing cover is provided with a wire guide hole; the lower end in the jet flow generating tube is provided with a charge, and a detonating lead of the charge is led out through a lead hole of the tail sealing cover; the mounting cylinder is fixed on the mounting cylinder positioning flat plate through a clamp; the high-speed water jet generating device is arranged in the water tank, and the water injection height in the water tank is higher than the upper end of the jet generating pipe; the mounting cylinder is connected with the target plate through a connecting base; the upper end of the connecting base is connected with the lower end of the mounting cylinder, the lower end of the connecting base is connected with the upper end of the target plate, and a through hole is formed in the connecting base; a connecting base sealing ring is clamped between the connecting base and the target plate, and a Hopkinson bar measuring element sealing ring is arranged at a through hole of the connecting base and the target plate; the measuring end of the Hopkinson bar measuring element sequentially penetrates through the through hole of the connecting base, the Hopkinson bar measuring element sealing ring and the through hole in the target plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010204461.6A CN111337183B (en) | 2020-03-21 | 2020-03-21 | Hopkinson rod-based high-speed water jet generation and load measurement device and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010204461.6A CN111337183B (en) | 2020-03-21 | 2020-03-21 | Hopkinson rod-based high-speed water jet generation and load measurement device and system |
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| CN111337183B true CN111337183B (en) | 2021-12-07 |
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|---|---|
| CN111337183A (en) | 2020-06-26 |
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