Stand column structure for brake parachute rocket sled with large load and large overturning moment

Abstract

The invention provides a stand column structure for a brake parachute rocket sled with large load and large overturning moment. The stand column structure mainly solves the problem that an existing stand column structure formed by welding a supporting plate and a sealing plate cannot meet the requirement for the erection height of a large-load and large-overturning-moment brake parachute test. According to the scheme, a three-layer structure composed of a front stand column set, a middle stand column set and a rear stand column set is included, side rods are arranged between the layers for reinforcement, and a transverse rod and a vertical rod are arranged between the two measuring rods of the front stand column set and the rear stand column set and used for reinforcing the overall bearing capacity; a triangular flow structure is arranged on the windward side of the stand column structure. Compared with common stand columns, the number and distribution of the whole stand columns are increased, and the requirements for large loads and large overturning torque are met; meanwhile, a triangular rectification structure is additionally designed, so that the airflow field distribution of the skid body is optimized, and the aerodynamic resistance of the skid body is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of military product shooting range tests and mainly relates to a column structure for a large-load and large-turnover moment deceleration parachute rocket sled. Background Art

[0002] The rocket sled test is a large-scale, high-precision ground simulation test system developed in the mid-to-late 20th century. It can simulate the dynamic environment of test objects such as aircraft, missiles, and aerospace vehicles during flight. It is powered by a rocket engine and glides at high speed along a dedicated track. The rocket sled test is not limited by the mass and volume of the test object. It can test anything from full-size aircraft to electrical components. The rocket sled test can achieve certain vibration overload, speed, acceleration and other conditions to meet the test requirements of the test object. The weight of the sled can be as small as tens of kilograms or as large as more than ten tons; the rocket sled's gliding speed can range from subsonic to 7 times the speed of sound or higher, and it is the most confident ground test method. When conducting a rocket sled test, the test piece needs to be erected at a certain height. The bracket used for the current double-track rocket sled is a column structure formed by welding a support plate and a cover plate. The height of the bracket used for the double-track rocket sled is generally around 0.5m to 1.0m. This structure cannot meet the requirements of a rocket sled test with a test piece height ≥1.8m; and for a rocket sled deceleration parachute test with a test piece height ≥1.8m, it has the characteristics of large load and large rollover torque at high speed. Since this type of test piece has a large semi-cone angle and a large reversal torque is generated during the parachute ejection process and the parachute opening process, the existing column support structure cannot meet the test requirements. Therefore, it is necessary to design a high-strength, aerodynamically good elevated support structure to meet the needs of this type of scientific research experiment. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art and adapt to the experiment of a deceleration parachute rocket sled with large load and large rollover torque, a column structure for a deceleration parachute rocket sled with large load and large rollover torque is provided.

[0004] A column structure for a large-load and large-turning-torque deceleration parachute rocket sled, comprising a supporting portion and a connecting portion; the connecting portion comprises a first side rod and a second side rod; the supporting portion comprises a front column group and a rear column group; the front column group comprises a first oblique rod and a second oblique rod; the bottom surfaces of the first oblique rod and the second oblique rod are coplanar; the angle between the first oblique rod and the horizontal plane is equal to the angle between the second oblique rod and the horizontal plane; the first oblique rod and the second oblique rod are arranged in an "eight" shape; the rear column group comprises a third oblique rod and a fourth oblique rod; the angle between the third oblique rod and the horizontal plane is equal to the angle between the first oblique rod and the horizontal plane; the angle between the fourth oblique rod and the horizontal plane is equal to the angle between the second oblique rod and the horizontal plane; blind holes are respectively arranged on the sides of the first oblique rod and the third oblique rod; the first side One end of the rod is fixed in the blind hole of the first oblique rod; the other end of the first side rod is fixed in the blind hole of the third oblique rod; blind holes are respectively arranged on the sides of the second oblique rod and the fourth oblique rod; one end of the second side rod is fixed in the blind hole of the second oblique rod; the other end of the second side rod is fixed in the blind hole of the fourth oblique rod; a column cross rod is arranged between the first oblique rod and the second oblique rod; a column vertical rod is arranged at the center of the bottom surface of the column cross rod; the bottom surface of the column vertical rod is coplanar with the bottom surfaces of the first oblique rod and the second oblique rod; the column cross rod and the column vertical rod constitute a reinforcement structure to increase the rigidity of the overall structure; connecting plates are respectively arranged on the top surfaces of the first oblique rod and the second oblique rod; arc-shaped surfaces are respectively arranged on the top surfaces of the third oblique rod and the fourth oblique rod; the arc-shaped surfaces are the same as the outer surface of the test piece.

[0005] Furthermore, a middle column group is arranged between the front column group and the rear column group; the middle column group includes a fifth diagonal rod and a sixth diagonal rod; the fifth diagonal rod is on the plane where the first diagonal rod and the third diagonal rod are located, and the fifth diagonal rod is parallel to the first diagonal rod and the third diagonal rod; the sixth diagonal rod is on the plane where the second diagonal rod and the fourth diagonal rod are located, and the sixth diagonal rod is parallel to the second diagonal rod and the fourth diagonal rod; connecting plates are respectively arranged on the top surfaces of the fifth diagonal rod and the sixth diagonal rod.

[0006] Furthermore, a reinforcement structure is provided between the third diagonal rod and the fourth diagonal rod of the rear pillar group.

[0007] Furthermore, triangular rectification structures are respectively arranged on the windward surfaces of the first oblique rod, the second oblique rod, the third oblique rod and the fourth oblique rod; the triangular rectification structure is a triangular prism with a triangular cross-section; the triangular rectification structure is used to reduce the influence of aerodynamic drag.

[0008] Furthermore, a triangular rectifying structure is provided on the windward surface of the reinforcement structure to reduce the influence of aerodynamic drag.

[0009] Furthermore, the connecting plate is a rectangular plate; a connecting plate groove is provided on the bottom surface of the connecting plate; a fixing hole is provided at the bottom of the connecting plate groove; a lug perpendicular to the top surface is provided on the top surface of the connecting plate; a lug through hole is provided on the lug; the connecting plate includes a first connecting plate, a second connecting plate, a third connecting plate and a fourth connecting plate; the top surface of the first oblique rod is nested in the connecting plate groove of the first connecting plate; the top surface of the second oblique rod is nested in the connecting plate groove of the second connecting plate; the top surface of the fifth oblique rod is nested in the connecting plate groove of the third connecting plate; the top surface of the sixth oblique rod is nested in the connecting plate groove of the fourth connecting plate.

[0010] Furthermore, the first connecting plate and the second connecting plate have two fixing holes at the bottom of the connecting plate grooves, which are used to increase the connection strength.

[0011] Furthermore, a first reinforcement rod is added between the bottom of the second oblique rod and the top of the fourth oblique rod; a second reinforcement rod is added between the top of the second oblique rod and the bottom of the fourth oblique rod; the first reinforcement rod and the second reinforcement rod constitute a reinforcement structure; the force generated by the aerodynamic force and the movement of the test piece can be dispersed to enhance the structural stability.

[0012] Furthermore, a reinforcement structure is provided between the first diagonal rod and the third diagonal rod.

[0013] Furthermore, the connecting portion and the supporting portion are integrally formed to increase the rigidity of the overall structure.

[0014] The beneficial effects of the present invention are:

[0015] 1. The advantage of the present invention is that the integral column is a three-layer structure, and side rods are used to reinforce each layer. Compared with the commonly used columns, the number and distribution of the integral columns are increased, and the force is more dispersed from the structural point of view, meeting the requirements of large load and large overturning moment.

[0016] 2. The advantages of the present invention also lie in that the two sides of the integral pillars are in an "eight" shape, and the front pillar group is designed with a triangular rectification structure, which optimizes the airflow field distribution of the sled body and reduces the aerodynamic resistance of the sled body.

[0017] 3. The advantages of the present invention also lie in that the width of the overall column is determined according to the diameter of the test piece, the distance between the front, middle and rear column groups is determined according to the mass distribution of the test piece, the length of the connecting plate and the number of through holes are determined according to the connection interface of the test piece, and it can be used for test pieces of various sizes and masses.

[0018] 4. The advantages of the present invention also lie in that the front and rear columns composed of column diagonal bars, column cross bars and column vertical bars are an integral structure with high rigidity and reduced deformation caused by welding.

[0019] 5. The advantage of the present invention is that compared with the commonly used columns, the erection height of the integral columns of the present invention is increased by more than 80%, and the structural stability is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall column structure of the present invention;

[0021] Figure 2 Schematic diagram of the front column group of the integral column of the present invention;

[0022] Figure 3 It is a schematic diagram of a middle column group of an integral column of the present invention;

[0023] Figure 4 It is a schematic diagram of the rear column group of the integral column of the present invention;

[0024] Figure 5 The present invention is a schematic diagram of an integral column consisting of a first connecting plate and a second connecting plate; (a) is a schematic diagram of the top surface; (b) is a schematic diagram of the bottom surface;

[0025] Figure 6 Schematic diagrams of the third connecting plate and the fourth connecting plate of the integral column of the present invention; (a) is a schematic diagram of the top surface; (b) is a schematic diagram of the bottom surface;

[0026] Among them: 1 is the front column group; 1-1 is the first diagonal rod; 1-2 is the second diagonal rod; 2 is the middle column group; 2-1 is the fifth diagonal rod; 2-2 is the sixth diagonal rod; 3-1 is the first side rod; 3-2 is the second side rod; 4 is the rear column group; 4-1 is the third diagonal rod; 4-2 is the fourth diagonal rod; 5-1 is the first connecting plate; 5-2 is the second connecting plate; 6 is the triangular rectifier structure; 7 is the column cross bar; 8 is the column vertical bar; 9-1 is the third connecting plate; 9-2 is the fourth connecting plate; 10-1 is the first reinforcement rod; 10-2 is the second reinforcement rod. DETAILED DESCRIPTION

[0027] The scheme adopted by the present invention is:

[0028] A column structure for a large-load and large-turnover moment deceleration parachute rocket sled, comprising a supporting portion and a connecting portion; the connecting portion comprises a first side rod and a second side rod;

[0029] The support portion comprises a front column group and a rear column group; the front column group comprises a first diagonal rod and a second diagonal rod; the bottom surfaces of the first diagonal rod and the second diagonal rod are coplanar; the angle between the first diagonal rod and the horizontal plane is equal to the angle between the second diagonal rod and the horizontal plane; the first diagonal rod and the second diagonal rod are arranged in an "eight" shape; the rear column group comprises a third diagonal rod and a fourth diagonal rod; the angle between the third diagonal rod and the horizontal plane is equal to the angle between the first diagonal rod and the horizontal plane; the angle between the fourth diagonal rod and the horizontal plane is equal to the angle between the second diagonal rod and the horizontal plane;

[0030] Blind holes are respectively arranged on the sides of the first oblique rod and the third oblique rod; one end of the first side rod is fixedly arranged in the blind hole of the first oblique rod; the other end of the first side rod is fixedly arranged in the blind hole of the third oblique rod;

[0031] Blind holes are respectively arranged on the sides of the second oblique rod and the fourth oblique rod; one end of the second side rod is fixedly arranged in the blind hole of the second oblique rod; the other end of the second side rod is fixedly arranged in the blind hole of the fourth oblique rod;

[0032] A column cross bar is arranged between the first diagonal bar and the second diagonal bar; a column vertical bar is arranged at the center of the bottom surface of the column cross bar; the bottom surface of the column vertical bar is coplanar with the bottom surfaces of the first diagonal bar and the second diagonal bar; the column cross bar and the column vertical bar constitute a reinforcement structure to increase the rigidity of the overall structure;

[0033] A reinforcement structure is provided between the third diagonal rod and the fourth diagonal rod of the rear pillar group;

[0034] A triangular rectification structure is respectively arranged on the windward surfaces of the first oblique rod, the second oblique rod, the third oblique rod and the fourth oblique rod; the triangular rectification structure is a triangular prism with a triangular cross section; the triangular rectification structure is used to reduce the influence of aerodynamic drag;

[0035] A triangular rectification structure is provided on the windward surface of the reinforcement structure to reduce the influence of aerodynamic drag;

[0036] A middle column group is arranged between the front column group and the rear column group; the middle column group includes a fifth diagonal rod and a sixth diagonal rod; the fifth diagonal rod is on the plane where the first diagonal rod and the third diagonal rod are located, and the fifth diagonal rod is parallel to the first diagonal rod and the third diagonal rod; the sixth diagonal rod is on the plane where the second diagonal rod and the fourth diagonal rod are located, and the sixth diagonal rod is parallel to the second diagonal rod and the fourth diagonal rod;

[0037] The top surfaces of the first oblique rod and the second oblique rod are respectively provided with connecting plates;

[0038] The top surfaces of the fifth oblique rod and the sixth oblique rod are respectively provided with connecting plates;

[0039] The top surfaces of the third oblique rod and the fourth oblique rod are respectively provided with arc-shaped curved surfaces; the arc-shaped curved surfaces are the same as the outer surface of the test object, so as to increase the support area of ​​the test object;

[0040] The connecting plate is a rectangular plate; a connecting plate groove is provided on the bottom surface of the connecting plate; a fixing hole is provided at the bottom of the connecting plate groove; a lug perpendicular to the top surface is provided on the top surface of the connecting plate; a lug through hole is provided on the lug; the connecting plate comprises a first connecting plate, a second connecting plate, a third connecting plate and a fourth connecting plate; the top surface of the first oblique rod is nested in the connecting plate groove of the first connecting plate; the top surface of the second oblique rod is nested in the connecting plate groove of the second connecting plate; the top surface of the fifth connecting plate is nested in the connecting plate groove of the third connecting plate; the top surface of the sixth connecting plate is nested in the connecting plate groove of the fourth connecting plate;

[0041] There are two fixing holes at the bottom of the connecting plate grooves of the first connecting plate and the second connecting plate, which are used to increase the connection strength;

[0042] A first reinforcing rod is added between the bottom of the second oblique rod and the top of the fourth oblique rod; a second reinforcing rod is added between the top of the second oblique rod and the bottom of the fourth oblique rod; the first reinforcing rod and the second reinforcing rod constitute a reinforcing structure; the force generated by the aerodynamic force and the movement of the test piece can be dispersed to enhance the structural stability;

[0043] A reinforcement structure is arranged between the first diagonal rod and the third diagonal rod.

[0044] The connecting part and the supporting part are integrally formed to increase the rigidity of the overall structure.

[0045] When in use, the column structure is fixed to the sled body, and the test object is fixedly connected through the connecting plate of the column structure, thereby meeting the height test requirements of the test object.

[0046] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0047] The purpose of the present invention is to provide an elevated support integral column structure in view of the fact that the existing column structure formed by welding a support plate and a sealing plate cannot meet the requirements of the elevated height of a large load and large rollover moment deceleration parachute test. The column structure has high strength, is easy to process, and has good aerodynamic performance. It is an integral column structure of a rocket sled that can meet the requirements of a deceleration parachute opening test of a ton-level load, supersonic speed, large rollover moment, and elevated position.

[0048] The present invention is an integral column, which is mainly composed of a three-layer structure of a front column group, a middle column group, and a rear column group, and each layer is reinforced by a side rod. This structure can carry out good force transmission to withstand large loads and large overturning moments. The front and rear column groups include column diagonal rods, column cross rods, column vertical rods, connecting plates, etc., and the middle column includes column diagonal rods and connecting plates. The column diagonal rods, column cross rods, and column vertical rods are welded by steel plates. The column diagonal rods of the front and rear column groups form an "eight" shape and are welded together through the column cross rods, and the column vertical rods are welded in the middle of the lower surface of the column cross rods. Since the middle column has a smaller bearing force, only the column diagonal rods form an "eight" shape. The connecting plate is welded to the upper end face of each column diagonal rod, and is designed with a through hole for connection with the test object. The front end face of each rod of the front column group has a triangular rectifier structure to reduce the influence of aerodynamic resistance. According to the requirements of the test airflow field, the "eight"-shaped column diagonal rod can be changed to change the flow field inside and outside the whole column, thereby changing the aerodynamic pressure, aerodynamic lift moment and flow field of other parts of the sled. The angle of the rectifier structure can also be changed to adjust the size of the aerodynamic resistance, thereby changing the test speed of the rocket sled. The height of the column diagonal rod can be designed according to the height requirements of the test object, and the length of the connecting plate is determined according to the position of the connection interface of the test object.

[0049] The implementation of the present invention lies in that: when conducting a rocket sled test, the test piece needs to be erected at a certain height, generally about 0.5m to 1.0m, and the test piece is fixed at the front end of the rocket sled. The commonly used erection bracket is a column structure formed by welding a support plate and a sealing plate. When the erection height of this column is above 1.0mm, it will not be able to withstand the large load and large rollover torque generated by the deceleration parachute test piece during the parachute bag ejection process and the parachute opening process. The integral column designed by the present invention is a three-layer structure, which can meet the test piece erection height ≥1.8m, large load, and large rollover torque.

[0050] The present invention is also realized in that the two sides of the integral column are in an "eight" shape, and the aerodynamic pressure, aerodynamic lift moment and flow field of other parts of the sled can be changed by changing the angle of the "eight" shape to meet the test airflow field requirements.

[0051] The present invention is also realized in that the front end surface of each rod of the front column group has a triangular rectifying structure for adjusting the aerodynamic resistance of the sled body, and selecting a suitable angle according to aerodynamic analysis and trajectory calculation, thereby changing the test speed of the rocket sled.

[0052] The present invention is also realized by: the middle of the two column diagonal bars of the front and rear column groups are welded together by the column cross bar, and the column vertical bar is welded to the middle of the lower surface of the column cross bar. The side column diagonal bars are connected into a whole through the column cross bar and the column vertical bar, thereby increasing the rigidity of the overall structure of the front and rear column groups.

[0053] The present invention is also realized in that: side rods are provided between the front, middle and rear column groups for reinforcement, so that good force transmission can be performed and the force generated by the aerodynamic force and the movement of the test piece can be dispersed.

[0054] The present invention is also realized in that the column diagonal rod, column horizontal rod and column vertical rod are welded by 6mm BS-700 steel plate, and for materials with strict quality requirements, 4mm thick 30CrMnSi steel plate is selected and heat treated to improve material performance.

Claims

1. A column structure for a large load and large turning moment deceleration parachute rocket sled, characterized in that: The invention comprises a supporting part and a connecting part; the connecting part comprises a first side rod and a second side rod; the supporting part comprises a front column group and a rear column group; the front column group comprises a first oblique rod and a second oblique rod; the bottom surfaces of the first oblique rod and the second oblique rod are coplanar; the angle between the first oblique rod and the horizontal plane is equal to the angle between the second oblique rod and the horizontal plane; the first oblique rod and the second oblique rod are arranged in an "eight" shape; the rear column group comprises a third oblique rod and a fourth oblique rod; the angle between the third oblique rod and the horizontal plane is equal to the angle between the first oblique rod and the horizontal plane; the angle between the fourth oblique rod and the horizontal plane is equal to the angle between the second oblique rod and the horizontal plane; blind holes are respectively arranged on the sides of the first oblique rod and the third oblique rod; one end of the first side rod is fixedly arranged on the first oblique rod in a blind hole; the other end of the first side rod is fixedly arranged in the blind hole of the third oblique rod; blind holes are respectively arranged on the sides of the second oblique rod and the fourth oblique rod; one end of the second side rod is fixedly arranged in the blind hole of the second oblique rod; the other end of the second side rod is fixedly arranged in the blind hole of the fourth oblique rod; a column cross rod is arranged between the first oblique rod and the second oblique rod; a column vertical rod is arranged at the center of the bottom surface of the column cross rod; the bottom surface of the column vertical rod is coplanar with the bottom surfaces of the first oblique rod and the second oblique rod; the column cross rod and the column vertical rod constitute a reinforcement structure to increase the rigidity of the overall structure; connecting plates are respectively arranged on the top surfaces of the first oblique rod and the second oblique rod; arc-shaped surfaces are respectively arranged on the top surfaces of the third oblique rod and the fourth oblique rod; the arc-shaped surfaces are the same as the outer surface of the test object.

2. The column structure for a large load and large turning moment deceleration parachute rocket sled according to claim 1 is characterized in that: A middle column group is arranged between the front column group and the rear column group; the middle column group includes a fifth diagonal rod and a sixth diagonal rod; the fifth diagonal rod is on the plane where the first diagonal rod and the third diagonal rod are located, and the fifth diagonal rod is parallel to the first diagonal rod and the third diagonal rod; the sixth diagonal rod is on the plane where the second diagonal rod and the fourth diagonal rod are located, and the sixth diagonal rod is parallel to the second diagonal rod and the fourth diagonal rod; connecting plates are respectively arranged on the top surfaces of the fifth diagonal rod and the sixth diagonal rod.

3. The column structure for a large load and large rollover moment deceleration parachute rocket sled according to claim 1 is characterized in that: A reinforcement structure is arranged between the third diagonal rod and the fourth diagonal rod of the rear pillar group.

4. The column structure for a large load and large rollover moment deceleration parachute rocket sled according to claim 1 is characterized in that: A triangular rectification structure is respectively arranged on the windward surfaces of the first oblique rod, the second oblique rod, the third oblique rod and the fourth oblique rod; the triangular rectification structure is a triangular prism with a triangular cross section; the triangular rectification structure is used to reduce the influence of aerodynamic drag.

5. The column structure for a large load and large rollover moment deceleration parachute rocket sled according to claim 1 is characterized in that: A triangular rectification structure is arranged on the windward surface of the reinforcement structure to reduce the influence of aerodynamic resistance.

6. The column structure for a large load and large rollover moment deceleration parachute rocket sled according to claim 1 is characterized in that: A first reinforcing rod is added between the bottom of the second oblique rod and the top of the fourth oblique rod; a second reinforcing rod is added between the top of the second oblique rod and the bottom of the fourth oblique rod; the first reinforcing rod and the second reinforcing rod constitute a reinforcing structure; the force generated by the aerodynamic force and the movement of the test piece can be dispersed to enhance the structural stability.

7. The column structure for a large load and large rollover moment deceleration parachute rocket sled according to claim 1 is characterized in that: A reinforcement structure is arranged between the first diagonal rod and the third diagonal rod.

8. The column structure for a large load and large rollover moment deceleration parachute rocket sled according to claim 1 is characterized in that: The connecting part and the supporting part are integrally formed to increase the rigidity of the overall structure.

9. The column structure for a large load and large turning moment deceleration parachute rocket sled according to claim 2 is characterized in that: The connecting plate is a rectangular plate; a connecting plate groove is provided on the bottom surface of the connecting plate; a fixing hole is provided at the bottom of the connecting plate groove; a lug perpendicular to the top surface is provided on the top surface of the connecting plate; a lug through hole is provided on the lug; the connecting plate includes a first connecting plate, a second connecting plate, a third connecting plate and a fourth connecting plate; the top surface of the first oblique rod is nested in the connecting plate groove of the first connecting plate; the top surface of the second oblique rod is nested in the connecting plate groove of the second connecting plate; the top surface of the fifth oblique rod is nested in the connecting plate groove of the third connecting plate; the top surface of the sixth oblique rod is nested in the connecting plate groove of the fourth connecting plate.

10. The column structure for a large load and large rollover moment deceleration parachute rocket sled according to claim 9, characterized in that: The first connecting plate and the second connecting plate have two fixing holes at the bottom of the connecting plate groove.

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