CN113029757A - Hopkinson bar modularized support test platform - Google Patents
Hopkinson bar modularized support test platform Download PDFInfo
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- CN113029757A CN113029757A CN202110333312.4A CN202110333312A CN113029757A CN 113029757 A CN113029757 A CN 113029757A CN 202110333312 A CN202110333312 A CN 202110333312A CN 113029757 A CN113029757 A CN 113029757A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
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Abstract
The invention discloses a modular support test platform for Hopkinson bars, belongs to the field of material dynamic mechanical property experimental equipment, and aims to solve the problems of an existing Hopkinson bar support platform. The invention comprises a rod p pair of adjustable supports, m square positioning guide rails, m +1 double-T-shaped groove row knife boards and a box-shaped supporting platform; m +1 double-T-shaped groove row knife boards are assembled on the box-shaped supporting platform in a splicing mode along the length direction, lower positioning grooves are formed in the centers of the upper surfaces of the double-T-shaped groove row knife boards along the length direction, and m +1 communicated lower positioning grooves are positioned by continuously embedding m square positioning guide rails; two rows of T-shaped grooves are arranged on the double-T-shaped groove row knife plate along the length direction, and the centers of the two rows of T-shaped grooves are symmetrical; each pair of adjustable supports is used for supporting a Hopkinson bar, and p pairs of adjustable supports slide along the square positioning guide rail and are fixed after each pair of adjustable supports are determined according to the positions of the bars.
Description
Technical Field
The invention relates to a modular supporting test platform for a Hopkinson tension/compression/torsion bar experiment system, and belongs to the field of material dynamic mechanical property experiment equipment.
Background
Hopkinson bar (pull rod, compression bar and torsion bar) equipment is an experimental device for developing dynamic mechanical property test research of materials, and the key point of success and failure of the test lies in that an impact bar (impact tube) is closely and accurately attached to a contact end face of an incident bar and a contact end face of a transmission bar, and the impact bar (impact tube), the incident bar, the transmission bar and the energy absorption bar need to ensure coaxiality, and need to be easily installed, centered and aligned and adjusted, so that a reliable bar adjustable support is needed. Meanwhile, a transmitting system, an incident rod, a transmission rod, an energy absorption rod, a buffer system, a torque loading device, a torsion bar clamping and releasing device, a rod supporting seat and the like in the Hopkinson bar experimental device are effectively installed through a modular supporting test platform which is accurately designed, ultra-flat and high in bearing capacity, and the Hopkinson bar experimental device is convenient to use, and has excellent repeatability and functions. At present, for a Hopkinson bar supporting platform, a cast iron platform with a T-shaped groove is generally adopted, the cast iron platform is high in mass, easy to rust and difficult to move, and alignment and leveling difficulty is high; the support platform is formed by aluminum profiles with T-shaped grooves, and the rigidity of the support platform is difficult to meet the requirements of experiments sometimes; the platform composed of H steel and the like is inconvenient to adjust and install due to the absence of a T-shaped groove; some also take the form of platforms with rails, sleepers and foundation supports, with the support being supported by the rods of the central support.
The support of the rod is often supported by a v-block or a linear bearing. The V-shaped block supporting mode usually depends on the slight movement of a support gap to adjust the transverse position, and the height is adjusted by a lead screw below the V-shaped block, the height adjustment is accurate, but the transverse adjustment is very difficult, and the friction between the V-shaped block and a rod system is large. The linear bearing supporting mode has small friction force, the transverse position is adjusted by slight movement of the gap of the support, the height is adjusted by a gasket below the support, the height adjustment and the transverse adjustment are difficult, and particularly, when the straightness of the rod piece is poor, the leveling and aligning operation is extremely difficult. Some rod systems also adopt a supporting support of a central support, and pulleys are arranged at the supporting points of the central frame, so that the friction influence between the rod systems and the supporting points can be reduced.
Disclosure of Invention
The invention aims to solve the problems of an existing Hopkinson bar supporting platform and provides a Hopkinson bar modularized supporting and testing platform. The modular design has the advantages of high bearing capacity, simple structure, convenience, rapidness and reliability in installation, high precision, easiness in leveling and straightening, capability of expanding and upgrading, convenience in batch production, cost reduction and excellent repeatability.
The invention relates to a Hopkinson bar modularized bearing test platform, which comprises a bar p pair of adjustable supports 1, m square positioning guide rails 2, m +1 double-T-shaped groove row knife boards 3 and a box-shaped support platform 4, wherein the adjustable supports are arranged on the bar p pair;
m +1 double-T-shaped groove row knife boards 3 are assembled on the box-shaped supporting platform 4 in a splicing mode along the length direction, lower positioning grooves 3-1 are formed in the center of the upper surface of each double-T-shaped groove row knife board 3 along the length direction, and m +1 communicated lower positioning grooves 3-1 are positioned by continuously embedding m square positioning guide rails 2; the double-T-shaped groove row knife plate 3 is provided with two rows of T-shaped grooves 3-2 along the length direction, and the two rows of T-shaped grooves 3-2 are centrosymmetric;
each pair of adjustable supports 1 is used for supporting a Hopkinson bar, and p pairs of adjustable supports 1 slide along the square positioning guide rail 2 and are fixed after the position of each pair of adjustable supports 1 is determined according to the position of the bar.
Preferably, a plurality of nuts are placed at the bottoms of the two rows of T-shaped grooves 3-2 of the double-T-shaped groove row cutting board 3, and a plurality of threaded holes are uniformly distributed at the bottom of the lower positioning groove 3-1.
Preferably, the Hopkinson bar comprises an input bar, an output bar, an energy absorbing bar, a striker bar and an energy absorbing bar, wherein the striker bar is positioned in the impact tube, and the adjustable support 1 achieves the purpose of supporting the striker bar by supporting the impact tube.
Preferably, the adjustable support 1 is an inverted T-shaped plate, the left and right of a lower transverse plate of the adjustable support 1 are symmetrically provided with bolt holes 1-2 for fixing positions, the lower surface of the center of the lower transverse plate is provided with an upper positioning groove 1-1, the adjustable support 1 is clamped on the square positioning guide rail 2 through the upper positioning groove 1-1, the gap between the width of the upper positioning groove 1-1 and the square positioning guide rail 2 is zero, a gap exists between the top surface of the square positioning guide rail 2 and the upper positioning groove 1-1, the adjustable support 1 slides along the m square positioning guide rails 2 through the upper positioning grooves 1-1 to the position of a Hopkinson bar to be supported, and bolts penetrate through the fixing positions at two sides and are connected and fixed through the bolt holes 1-2 and nuts arranged.
Preferably, the square positioning guide rail 2 is a plated square flat plate.
Preferably, a vertical plate of the adjustable support 1 is provided with a long hole 1-3, the Hopkinson bar penetrates through the long hole 1-3, a vertical threaded hole is formed in the center of the top of the long hole 1-3, two horizontal threaded holes are symmetrically formed in the left and right of the lower half section of the long hole 1-3, three bolts 8 are screwed into the three threaded holes from the outside, a steel ball 7 is arranged at the end of each bolt 8, and the steel ball 7 can rotate around the center of the steel ball 7 in situ under the action of external force; adjusting the bolts 8 in the three threaded holes to push the three steel balls 7 to align the position in the long hole with a certain gap a in the horizontal direction and the vertical direction of the Hopkinson bar.
Preferably, the box-shaped supporting platform 4 is composed of H-shaped steel 4-1 and reinforcing ribs 4-2, the H-shaped steel 4-1 placed horizontally is provided with a main beam 4-1-1 in the vertical direction, the reinforcing ribs 4-2 are symmetrically arranged on two sides of the main beam 4-1-1, and the reinforcing ribs 4-2 are whole plates or segmented plates.
Preferably, a plurality of bolt holes 2-1 are uniformly distributed in the square positioning guide rail 2, the hole distance is the same as the distance of threaded holes in the bottom of the lower positioning groove 3-1 of the double-T-shaped groove row cutting plate 3, and the square positioning guide rail 2 is fixed to a main beam 4-1-1 of the H-shaped steel 4-1 through bolts penetrating through the corresponding threaded holes from top to bottom.
Preferably, the platform comprises a platform leg 5 and a height adjusting bolt 6, wherein the platform leg 5 is used for supporting the box-shaped supporting platform 4, and the bottom of the platform leg 5 is provided with the height adjusting bolt 6 for leveling.
Preferably, the platform legs 5 are welded in a pi-shape from square steel tubes.
The invention has the beneficial effects that: the modular support test platform and the rod adjustable support can be used for a Hopkinson pressure bar, a pull rod and a torsion bar to perform a material dynamic mechanical property experiment with high strain rate, a three-point bending dynamic fracture toughness experiment, a Taylor impact and penetration experiment directly, and an experiment with accurate static and dynamic hardness. The platform adopts a modularized accurate design, can be extended to any system length according to the requirement of an experimental task, and realizes the integral upgrade of the system. The adjustable support, the square positioning guide rail and the double T-shaped row cutter plates jointly ensure the convenient, fast and reliable centering adjustment of the rod system. Three steel balls of the adjustable support can reduce the friction force of the experiment to realize the functions of a linear bearing and a needle bearing. The modularized support test platform overcomes the defects of complex structural design, inconvenient installation and debugging, poor bearing capacity, poor centering performance, poor repeatability and the like of the existing platform, and really provides the modularized support test platform which has the advantages of high bearing capacity, simple structure, convenience and rapidness in installation, high reliability, high precision, easiness in leveling and straightening, expandable upgrading, convenience in batch production, cost reduction and excellent repeatability.
Drawings
FIG. 1 is a front view of a Hopkinson bar modular support test platform in accordance with the present invention;
FIG. 2 is a front view of the adjustable support for the rod;
FIG. 3 is a schematic perspective view of the adjustable support for the rod;
FIG. 4 is a cross-sectional view of FIG. 1;
FIG. 5 is a schematic structural diagram of a double T-slot row cutting plate;
fig. 6 is a schematic structural view of a square positioning rail.
Detailed Description
The first embodiment is as follows: the following describes the present embodiment with reference to fig. 1 to 6, and the hopkinson rod modular support test platform in the present embodiment includes a pair of adjustable supports 1, m square positioning guide rails 2, m +1 double T-shaped groove row knife boards 3, a box-shaped support platform 4, platform support legs 5 and height adjusting bolts 6, where the platform support legs 5 are used for supporting the box-shaped support platform 4, and the bottom of the platform support legs 5 is provided with the height adjusting bolts 6 for leveling. The platform supporting legs 5 are formed by welding square steel pipes according to the shape of pi.
The test platform is formed by assembling standard modules along the length direction, and the extension of the test system in the length direction can be realized.
M +1 double-T-shaped groove row knife boards 3 are assembled on the box-shaped supporting platform 4 in a splicing mode along the length direction, lower positioning grooves 3-1 are formed in the center of the upper surface of each double-T-shaped groove row knife board 3 along the length direction, and m +1 communicated lower positioning grooves 3-1 are positioned by continuously embedding m square positioning guide rails 2; the double-T-shaped groove row knife plate 3 is provided with two rows of T-shaped grooves 3-2 along the length direction, and the two rows of T-shaped grooves 3-2 are centrosymmetric; the bottoms of the two rows of T-shaped grooves 3-2 of the double-T-shaped groove row knife plate 3 are uniformly provided with a plurality of nuts, and the bottoms of the lower positioning grooves 3-1 are uniformly provided with a plurality of threaded holes. The double-T-shaped groove row knife board 3 is made of a stainless steel plate or is electroplated for rust prevention after being made of a steel plate.
Each pair of adjustable supports 1 is used for supporting a Hopkinson bar, and p pairs of adjustable supports 1 slide along the square positioning guide rail 2 and are fixed after the position of each pair of adjustable supports 1 is determined according to the position of the bar.
The Hopkinson bar comprises an input bar, an output bar, an energy absorbing bar, a striking bar and an energy absorbing bar, wherein the striking bar is positioned in the striking pipe, and the adjustable support 1 achieves the purpose of supporting the striking bar through supporting the striking pipe.
The adjustable support 1 is an inverted T-shaped plate, threaded holes 1-2 for fixing positions are symmetrically arranged on the left side and the right side of a lower transverse plate of the adjustable support 1, an upper positioning groove 1-1 is arranged on the lower central surface of the lower transverse plate, the adjustable support 1 is clamped on the square positioning guide rail 2 through the upper positioning groove 1-1, the gap between the width of the upper positioning groove 1-1 and the square positioning guide rail 2 is zero, a gap exists between the top surface of the square positioning guide rail 2 and the upper positioning groove 1-1, the adjustable support 1 slides along the m square positioning guide rails 2 through the upper positioning grooves 1-1 to the position of a Hopkinson bar to be supported, and bolts penetrate through the fixed positions on the two sides and are connected and fixed through the threaded holes 1-2. The upper positioning groove 1-1 below the rod adjustable support 1 is symmetrical relative to the center of the long hole of the support, and the positioning groove below the adjustable support is matched with the square positioning guide rail to ensure the accurate position of the upper positioning groove on the double-T-shaped groove row cutter plate of the test platform and ensure the accurate positions of all the rod adjustable supports and all the double-T-shaped groove row cutter plates.
The square positioning guide rail 2 is an electroplated square flat plate.
A vertical plate of the adjustable support 1 is provided with a long hole 1-3, a Hopkinson bar penetrates through the long hole 1-3, a vertical threaded hole is formed in the center of the top of the long hole 1-3, two horizontal threaded holes are symmetrically formed in the lower half section of the long hole 1-3 in the left-right direction, three bolts 8 are screwed into the three threaded holes from the outside, a steel ball 7 is arranged at the end of each bolt 8, and the steel balls 7 can rotate around the center of the steel balls 7 in situ under the action of external force; adjusting the bolts 8 in the three threaded holes to push the three steel balls 7 to align the position in the hole with a certain gap a in the horizontal direction and the vertical direction of the Hopkinson bar.
The box-shaped supporting platform 4 is composed of H-shaped steel 4-1 and reinforcing ribs 4-2, the H-shaped steel 4-1 placed horizontally is provided with a main beam 4-1-1 in the vertical direction, the reinforcing ribs 4-2 are symmetrically arranged on two sides of the main beam 4-1-1, and the reinforcing ribs 4-2 are whole plates or segmented plates. The box-section H steel girder is formed by welding two steel plates on the side surface of standard H steel or is made of square steel pipes, so that the girder has the maximum bearing capacity during high-energy experiments.
Referring to fig. 1, a specific embodiment of a 40 mm hopkinson strut system is shown, where p is 3 and m is 3, the total length of the modular support test platform is 9000 mm, and the modular support test platform consists of 3 standard modules. A length of 3000 mm for one standard module, wherein: the diameter (width) of a long hole 1-3 of the rod adjustable support 1 is 40 mm, and the length (height) of the long hole is 45 mm; 3 square positioning guide rails are plated with 40CR flat plates with the thickness of 20 mm, and the length of each square positioning guide rail is 1000 mm; 4 double-T-shaped groove row cutting plates with positioning guide rail grooves in the middle are 240 mm wide, 25 mm thick and 750 mm long, the distance between the two T-shaped grooves is 160 mm, and 40CR processing electroplating is adopted; the main beam 4-1-1 is 3000 mm long and is welded by 150X 150H steel to form a box-shaped section, the introduced Hopkinson bar comprises an impact bar 13, an input bar 11 and an output bar 12, the impact bar 13 is positioned in the impact bar 10, a pair of adjustable supports 1 support the input bar 11 and a pair of adjustable supports 1 support the output bar 12, 4 double-T-groove row knife boards 3 are assembled on the test platform along the length direction, then two rows of T-grooves 3-2 of the 4 double-T-groove row knife boards 3 are respectively communicated, the lower positioning grooves 3-1 in the centers of the 4 double-T-groove row knife boards 3 are also communicated along the length direction, 3 square positioning guide rails 2 are clamped into the communicated positioning grooves, and the upper half sections of the square positioning guide rails 2 are exposed and used as guide rails of the adjustable supports 1. A plurality of threaded holes 2-1 are uniformly distributed on the square positioning guide rail 2, as shown in figure 6, the hole distance is the same as that of the threaded holes at the bottom of the lower positioning groove 3-1 of the double-T-shaped groove row cutting board 3, and the square positioning guide rail 2 is fixed on a main beam 4-1-1 of the H-shaped steel 4-1 by passing through the corresponding threaded holes at the upper part and the lower part through bolts. Thus, the square positioning guide rail 2, the double T-shaped groove row cutter plate 3 and the box-shaped supporting platform 4 are stably fixed together.
According to the scheme shown in the figure 1, an impact tube 10, an input rod 11 and an output rod 12 need to be placed in sequence from left to right, and a buffer 9 is fixed at the tail end of a platform, so that 3 pairs of adjustable supports 1 are clamped on a square positioning guide rail 2 and slide to corresponding positions along the square positioning guide rail 2, bolts penetrate through fixed positions on two sides of each adjustable support 1 and are fixedly connected with nuts arranged in T-shaped grooves 3-2 through threaded holes 1-2, and the positions of the adjustable supports 1 can be adjusted according to the actual conditions of Hopkinson bars during other test experiments.
The adjustable support 1 of the rod pushes three steel balls 7 to align and place in the horizontal direction and the position of the rod in the long hole with a certain clearance in the vertical direction by the clearance fit of the three central adjusting bolts 8 on the adjustable support, the rod can move up and down relative to the long hole of the support, and finally the accurate position is locked; the three steel balls 7 can rotate around the center of the steel balls in situ under the action of external force, so that the three steel balls have the functions of a linear bearing and a needle bearing.
Claims (10)
1. A Hopkinson bar modularized support test platform is characterized by comprising a bar p pair of adjustable supports (1), m square positioning guide rails (2), m +1 double-T-shaped groove knife-row plates (3) and a box-shaped support platform (4);
m +1 double-T-shaped groove row knife boards (3) are assembled on the box-shaped supporting platform (4) in a splicing mode along the length direction, lower positioning grooves (3-1) are formed in the center of the upper surface of each double-T-shaped groove row knife board (3) along the length direction, and m +1 communicated lower positioning grooves (3-1) are positioned by continuously embedding m square positioning guide rails (2); two rows of T-shaped grooves (3-2) are arranged on the double-T-shaped groove row cutting plate (3) along the length direction, and the two rows of T-shaped grooves (3-2) are centrosymmetric;
each pair of adjustable supports (1) is used for supporting a Hopkinson bar, p pairs of adjustable supports (1) slide along the square positioning guide rail (2), and the adjustable supports (1) are fixed after the positions of the adjustable supports (1) are determined according to the positions of the bars.
2. The modular Hopkinson bar supporting and testing platform according to claim 1, wherein a plurality of nuts are placed at the bottoms of two rows of T-shaped grooves (3-2) of the double T-shaped groove row cutting plate (3), and a plurality of threaded holes are uniformly distributed at the bottom of the lower positioning groove (3-1).
3. The modular Hopkinson bar bearing test platform according to claim 1, wherein the Hopkinson bar comprises an input bar, an output bar, an energy absorbing bar, a striker bar and an energy absorbing bar, wherein the striker bar is located in the impact tube, and the adjustable support (1) achieves the purpose of supporting the striker bar by supporting the impact tube.
4. The modular Hopkinson bar support test platform according to claim 2, wherein the square positioning rail (2) is an electroplated square plate.
5. The modular Hopkinson bar supporting test platform according to claim 4, wherein the adjustable support (1) is an inverted T-shaped plate, the lower transverse plate of the adjustable support (1) is bilaterally symmetrically provided with bolt holes (1-2) for fixing positions, the lower central surface of the lower transverse plate is provided with an upper positioning groove (1-1), the adjustable support (1) is clamped on the square positioning guide rail (2) through the upper positioning groove (1-1), the gap between the width of the upper positioning groove (1-1) and the square positioning guide rail (2) is zero, a gap exists between the top surface of the square positioning guide rail (2) and the upper positioning groove (1-1), the adjustable support (1) slides along m square positioning guide rails (2) through the upper positioning groove (1-1) to the position of the Hopkinson bar to be supported, and the bolt passes through the bolt holes (1-2) for fixing positions on two sides and is connected with a nut arranged in the T-shaped groove (3-2) And (4) fixing.
6. The modular Hopkinson bar supporting test platform according to claim 5, wherein a vertical plate of the adjustable support (1) is provided with a long hole (1-3), the Hopkinson bar penetrates through the long hole (1-3), a vertical threaded hole is formed in the center of the top of the long hole (1-3), two horizontal threaded holes are symmetrically formed in the lower half section of the long hole (1-3) in the left-right direction, three bolts (8) are screwed into the three threaded holes from the outside, a steel ball (7) is arranged at the end of each bolt (8), and the steel ball (7) can rotate around the center of the steel ball (7) in situ under the action of external force; adjusting bolts (8) in the three threaded holes to push the three steel balls (7) so as to align the horizontal direction of the Hopkinson bar and the position in the long hole with a certain gap a in the vertical direction.
7. The Hopkinson bar modular bearing test platform according to claim 1, wherein the box-shaped supporting platform (4) is composed of H-shaped steel (4-1) and reinforcing ribs (4-2), the H-shaped steel (4-1) placed horizontally is provided with a main beam (4-1-1) in the vertical direction, the reinforcing ribs (4-2) are symmetrically arranged on two sides of the main beam (4-1-1), and the reinforcing ribs (4-2) are whole plates or segmented plates.
8. The modular Hopkinson bar supporting and testing platform according to claim 2, wherein a plurality of bolt holes (2-1) are uniformly distributed in the square positioning guide rail (2), the hole pitch is the same as the pitch of threaded holes in the bottom of the lower positioning groove (3-1) of the double T-shaped groove row cutting plate (3), and the square positioning guide rail (2) is fixed to a main beam (4-1-1) of the H-shaped steel (4-1) through bolts penetrating through the corresponding threaded holes in the upper and lower positions.
9. Hopkinson bar modular bearing test platform according to claim 1, characterized in that it further comprises platform legs (5) and height adjusting bolts (6), said platform legs (5) are used to support the box-shaped support platform (4), and the bottom of the platform legs (5) are provided with height adjusting bolts (6) for leveling.
10. The modular Hopkinson bar support test platform according to claim 9, wherein the platform legs (5) are formed by welding square steel tubes in a pi-shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110333312.4A CN113029757A (en) | 2021-03-29 | 2021-03-29 | Hopkinson bar modularized support test platform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110333312.4A CN113029757A (en) | 2021-03-29 | 2021-03-29 | Hopkinson bar modularized support test platform |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113263481A (en) * | 2021-07-16 | 2021-08-17 | 成都飞机工业（集团）有限责任公司 | Reconfigurable modular assembly platform, system and assembly method for aircraft assembly |
| CN114112727A (en) * | 2021-11-29 | 2022-03-01 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Single-pulse Hopkinson torsion bar test device |
| CN114152505A (en) * | 2021-11-24 | 2022-03-08 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Stress reversal dynamic tensile loading test system |
| CN115452551A (en) * | 2022-08-23 | 2022-12-09 | 中国人民解放军空军工程大学 | Pneumatic Hopkinson torsion bar device and operation method |
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| CN113263481A (en) * | 2021-07-16 | 2021-08-17 | 成都飞机工业（集团）有限责任公司 | Reconfigurable modular assembly platform, system and assembly method for aircraft assembly |
| CN114152505A (en) * | 2021-11-24 | 2022-03-08 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Stress reversal dynamic tensile loading test system |
| CN114112727A (en) * | 2021-11-29 | 2022-03-01 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Single-pulse Hopkinson torsion bar test device |
| CN115452551A (en) * | 2022-08-23 | 2022-12-09 | 中国人民解放军空军工程大学 | Pneumatic Hopkinson torsion bar device and operation method |
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