A special-shaped longitudinal beam structure of a monorail rocket sled suitable for mesosonic speed

Abstract

The present invention discloses a special-shaped longitudinal beam structure suitable for a mesonic monorail rocket sled, wherein two main side plates are located on both sides of a main transverse plate to form a π-shaped structure, a side special-shaped inclined plate is provided on the main side plate, a side special-shaped inclined plate is connected to the main transverse plate, a reinforcing rib plate is provided on the side special-shaped inclined plate, a plurality of reinforcing rib plates connect the side special-shaped inclined plate and the side special-shaped inclined plate to form a rigidity-enhanced structure, and a plurality of transverse bottom rib plates are provided at the bottom of the main transverse plate. The present invention greatly increases the rigidity and strength of the longitudinal beam structure and improves the first-order response frequency of the structure.

Description

Technical Field

[0001] The invention belongs to the technical field of shooting range testing, and in particular relates to a special-shaped longitudinal beam structure of a monorail rocket sled. Background Art

[0002] High-speed maneuvers place higher demands on the ground test speed of missile weapon systems. As the main method for ground dynamic tests of missile weapon systems, rocket sled tests can effectively simulate the 1:1 mass and appearance of the test object, the speed, overload, attitude, aerodynamic environment, etc. of the actual working state on the ground, and realize the effective testing and evaluation of the actual working functions and performance of weapon systems / key components under multi-condition and multi-factor coupling conditions. It is an effective means of dynamic performance assessment. Rocket sled tests cover the fields of aviation, aerospace, weapons, ships, electronics, etc., and serve the army, navy, air force, rocket force and other military services. They play an important role in ground tests in the process of scientific research, finalization, and acceptance of weapons and equipment.

[0003] The rocket sled is a ground test system that is powered by a rocket engine and slides at high speed along a specially built slide track. It mainly simulates the speed and acceleration conditions in the development process of weapon systems and is used for functional assessment of aircraft, missiles, aerospace vehicles or components.

[0004] Rocket sleds are divided into monorail sleds, wing-shaped sleds and double-track sleds. A monorail rocket sled refers to a rocket sled that slides on a track. The advantages are that the rocket sled has a small mass, small aerodynamic resistance, and is easy to achieve hypersonic speed conditions. The disadvantages are that the existing monorail sled structure has weak load capacity, the rocket sled is prone to rolling effect, and the vibration dynamic environment is harsh.

[0005] As the development of weapons and equipment places higher and higher demands on quality and speed, the vibration dynamic environment of the sled body becomes increasingly severe, and the deformation of the sled body during operation increases, making the sled body easy to be damaged. Usually, the original monorail sled only adopts a simple longitudinal beam plus a clamping ring structure, which has low structural stiffness and carries a small mass of the test object, usually not exceeding 100kg. The sled body is prone to resonance, causing the sled body structure to disintegrate, and cannot meet the needs of hypersonic rocket sled tests. Therefore, the invention makes a variation design of the simple longitudinal beam structure, which is mainly used for the design of rocket sled body structures with speeds greater than 3Ma and test object masses greater than 100kg and less than 300kg, mainly to improve the overall structural stiffness of the sled body and ensure the structural reliability of the sled body during movement. Summary of the invention

[0006] In order to overcome the shortcomings of the prior art, the present invention provides a special-shaped longitudinal beam structure suitable for a mesonic monorail rocket sled, wherein two main side panels are located on both sides of the main transverse panel to form a π-shaped structure, the main side panels are provided with side special-shaped inclined panels, the main transverse panel is connected with side inclined panels, the side inclined panels are provided with reinforcing ribs, a plurality of reinforcing ribs connect the side inclined panels and the side special-shaped inclined panels to form a stiffening structure, and a plurality of transverse bottom ribs are provided at the bottom of the main transverse panel. The present invention greatly increases the stiffness and strength of the longitudinal beam structure and improves the first-order response frequency of the structure.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0008] A special-shaped longitudinal beam structure suitable for a mesosonic monorail rocket sled, comprising a main side plate, a main transverse plate, an upper inclined plate, a lower special-shaped plate, a transverse side rib plate, a reinforcing rib plate, a bottom transverse rib plate and a chassis longitudinal rib;

[0009] The direction of the rocket sled is defined as the negative direction of the Y axis; the direction perpendicular to the Y axis and with the plumb bob pointing upward is the positive direction of the Z axis; the direction perpendicular to the YZ plane and pointing to the left of the rocket sled's direction of movement is the positive direction of the X axis;

[0010] There are two main side plates, which are located at the lower side of the main transverse plate to form a π-shaped structure; an upper inclined plate is arranged above the main transverse plate; the main side plate is connected to the lower special-shaped plate; the upper inclined plate and the lower special-shaped plate are welded and connected at the top by a transverse side rib plate, and a plurality of reinforcing rib plates are embedded in the middle of the upper inclined plate; a plurality of transverse bottom rib plates and chassis longitudinal ribs are arranged at the bottom of the main transverse plate;

[0011] The outer side surface of the transverse side rib plate is aligned with the upper end surface of the upper inclined plate to form a rigidity reinforcement structure.

[0012] Preferably, the main side panels are perpendicular to the main transverse panel, the inner sides of the two main side panels are spaced 155 mm apart, and the inner sides of the main side panels are 100 mm away from the main transverse panel.

[0013] Preferably, the main transverse plate and the main side plate have the same length and are both made of 6 mm thick high-strength plate. They are symmetrically chamfered at 30° in the width direction. The main transverse plate is trapezoidal in width direction, with a bottom length of 334 mm and a top length of 355 mm.

[0014] Preferably, the upper inclined plate is made of high-strength plate with the same length as the main transverse plate, a width of 160 mm and a thickness of 4 mm, and is welded to the main transverse plate on both sides. The angle between the upper inclined plate and the main transverse plate is 30°, and an inverted trapezoidal structure is formed after welding; the angle between the upper inclined plate and the main side plate is 60.

[0015] Preferably, the lower side special-shaped plate is rolled using a high-strength plate with the same length as the main side plate and a thickness of 6 mm, and is welded to the outer side of the upper side inclined plate after overall forming; the lower side special-shaped plate is composed of three plate surfaces, the horizontal bottom surface welded to the main side plate is 12 mm wide, and the welding angle with the main side plate is 90°; the inclined plate connected to the horizontal ground is 155 mm wide, and the angle between the two is 150°; the inclined plate is connected to a vertical upright plate with a width of 95 mm, and the angle between the two is 120°, and the top surface of the vertical upright plate is aligned with the bottom surface of the transverse side rib plate to form a rigidity reinforced structure.

[0016] Preferably, the transverse side rib plate is made of high-strength plate with a thickness of 6 mm and a right-angled trapezoidal cross-section. The width of the upper top surface is 46 mm and the lower bottom surface is 51 mm. The outer right-angled surface is welded to the lower special-shaped plate, and the inner inclined surface is welded to the upper inclined plate to form a rigidity reinforced structure.

[0017] Preferably, the reinforcing rib plates are made of high-strength plates with a thickness of 6 mm and a width of 100 mm. After processing, they are evenly arranged at intervals of 200 mm, welded between the upper inclined plate and the lower special-shaped plate, and 24.5 mm away from the main cross plate, to form a rigidity reinforced structure.

[0018] Preferably, the bottom transverse rib plate is made of a high-strength plate with a thickness of 4 mm and is evenly welded at intervals of 150 mm at the inner joints of the main side plate and the main transverse plate to enhance the strength and rigidity of the structure.

[0019] Preferably, chassis longitudinal ribs with a length of 100.5 mm and a width of 18 mm are welded to the front and rear end surfaces of the main side panels for welding and connection with other components of the skid body to enhance the structural strength.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The present invention designs a high-rigidity special-shaped π-shaped monorail rocket sled longitudinal beam structure, and the longitudinal beam frame structure increases the rigidity of the longitudinal beam structure.

[0022] 2. The longitudinal beam structure designed in the present invention adds an upper inclined plate, a lower special-shaped plate, a reinforcing rib plate, a transverse rib plate, a bottom transverse rib plate and other structures on the basis of the π-shaped longitudinal beam, which greatly increases the rigidity and strength of the longitudinal beam structure and improves the first-order response frequency of the structure.

[0023] 3. The present invention considers the assembly problem when the longitudinal beam structure is butt-jointed with other skid body structures in the structural design, ensures the fit during butt-jointed installation by milling the butt end faces, and increases the welding strength when the longitudinal beam and other skid body structures are butt-jointed by using the chassis longitudinal ribs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a schematic diagram of the longitudinal beam structure of the high-rigidity special-shaped π-shaped monorail rocket sled of the present invention.

[0025] Figure 2 It is a schematic diagram of the main side plate structure of the present invention.

[0026] Figure 3 It is a schematic diagram of the main horizontal plate structure of the present invention.

[0027] Figure 4 It is a schematic diagram of the structure of the upper inclined plate of the present invention.

[0028] Figure 5 It is a schematic diagram of the structure of the lower side special-shaped plate of the present invention.

[0029] Figure 6 It is a schematic diagram of the transverse side rib structure of the present invention.

[0030] Figure 7 It is a schematic diagram of the reinforcing rib plate structure of the present invention.

[0031] Figure 8 It is a schematic diagram of the bottom transverse rib plate structure of the present invention.

[0032] Fig. 9 It is a schematic diagram of the chassis longitudinal reinforcement structure of the present invention.

[0033] Fig.10 It is an example longitudinal beam structure of a rocket sled applying the present invention.

[0034] Among them: 1—main side plate; 2—main transverse plate; 3—upper inclined plate; 4—lower special-shaped plate; 5—transverse side rib plate; 6—strengthening rib plate; 7—bottom transverse rib plate; 8—chassis longitudinal rib. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0036] The present invention is aimed at the current requirements for high speed and mass of weapons and equipment. However, the existing rocket sled test structure system has the problems of low stiffness, low first-order response frequency of the structure, large vibration dynamic environment, and structural stiffness that is difficult to meet the test requirements. To solve these problems, a monorail rocket sled longitudinal beam structure suitable for speeds above 3 Ma and a test object mass less than 300 kg is studied and designed. The structure can effectively improve the stiffness of the sled body, reduce the deformation of the sled body during the test, increase the first-order response frequency of the sled body, and improve the reliability of the rocket sled test process.

[0037] The present invention is described in detail below:

[0038] The invention is designed to ensure that the front structure of the rocket sled body can provide stability and vibration environment requirements suitable for the on-orbit operation of the rocket sled when a mesonic monorail rocket sled is conducting a rocket sled test at a speed of more than 3 Ma, while ensuring that the test object is safely and reliably fixed on the rocket sled with a heterogeneous beam structure.

[0039] The direction of the rocket sled is defined as the negative direction of the Y axis, the direction perpendicular to the Y axis and with the plumb bob pointing upward is the positive direction of the Z axis, and the direction perpendicular to the YZ plane and pointing to the left of the rocket sled's direction of movement is the positive direction of the X axis.

[0040] like Figures 1 to 10 As shown, the present invention is a special-shaped beam suitable for a mesonic monorail rocket sled. The main body of the structure is a trapezoidal frame structure with a cross section (cross section in the XZ plane direction), mainly comprising a main side plate 1, a main transverse plate 2, an upper inclined plate 3, a lower special-shaped plate 4, a transverse side rib plate 5, a reinforcing rib plate 6, a bottom transverse rib plate 7, and a chassis longitudinal rib 8; the two main side plates 1 are located at the lower side of the main transverse plate 2 to form a π-shaped structure, a side inclined plate 3 is provided on the main transverse plate, the main side plate is connected to the lower special-shaped plate 4, the top of the side inclined plate 3 and the lower special-shaped plate 4 are welded and connected by a transverse side rib plate 5, a plurality of reinforcing rib plates 6 are embedded in the middle, and a plurality of transverse bottom rib plates 7 and a chassis longitudinal rib 8 are provided at the bottom of the main transverse plate 2; the angle between the side inclined plate and the main side plate is 60°.

[0041] The outer side surface of the transverse side rib plate is aligned with the upper end surface of the side inclined plate to form a rigidity reinforcement structure.

[0042] All the sheet materials are of the same thickness.

[0043] The main transverse plate is trapezoidal in width direction.

[0044] The bottom side of the main horizontal plate trapezoid is 334 mm long and the top side is 355 mm long.

[0045] The main horizontal plate is made of high-strength plate with a thickness of 6 mm. The length is determined according to the connection structure, and the width direction is symmetrically processed with a 30° chamfer.

[0046] The present invention proposes a high-rigidity special-shaped π-shaped monorail rocket sled longitudinal beam structure, wherein two main side panels are located on both sides of a main transverse panel to form a π-shaped structure, the main side panels are provided with side special-shaped inclined panels, the main transverse panel is connected with side inclined panels, the side inclined panels are provided with reinforcing rib panels, a plurality of reinforcing rib panels connect the side inclined panels and the side special-shaped inclined panels to form a rigidity-enhanced structure, and a plurality of transverse bottom rib panels are provided at the bottom of the main transverse panel.

[0047] It mainly includes main side panels 1 welded on both sides of the sliding shoe, main transverse panel 2 welded above the sliding shoe and welded to the main side panel to form a π-shaped frame, upper inclined panel 3 welded on the main transverse panel, lower special-shaped panel 4 welded on the sides of the main side panel and the main transverse panel, transverse side rib panel 5 welded to connect the upper inclined panel and the lower special-shaped panel end, reinforcing rib panel 6 welded on the side inclined panel and the lower special-shaped panel to enhance rigidity, bottom transverse rib panel 7 welded on the inner joint of the main side panel and the main transverse panel to increase structural strength; chassis longitudinal rib 8 welded on the main side panel.

[0048] The present invention is also realized in that: the main side panels are processed with high-strength plates with a thickness of 6 mm, and two main side panels are welded on the same side of the main horizontal panel. When welding, the front and rear ends are aligned, the main side panels are perpendicular to the main horizontal panel, the inner sides of the two main side panels are spaced 155 mm apart, and the inner sides of the main side panels are 100 mm away from the main horizontal panel to form a main structure.

[0049] The implementation of the present invention lies in that the main horizontal plate and the main side plate have the same length and are both processed using high-strength plate with a thickness of 6 mm. The length is determined according to the connection structure, and the width direction is symmetrically processed with a 30° chamfer. The main horizontal plate is trapezoidal in width direction, with a bottom side length of 334 mm and a top side length of 355 mm.

[0050] The implementation of the present invention also lies in that the upper inclined plate is made of high-strength plate with the same length as the main horizontal plate, a width of 160 mm and a thickness of 4 mm, and is welded to the main horizontal plate on both sides. The angle between the upper inclined plate and the main horizontal plate is 30°, and an inverted trapezoidal structure is formed after welding.

[0051] The present invention is also realized in that: the lower side special-shaped plate is made of high-strength plate with the same length as the main side plate and a thickness of 6mm, and is welded to the outside of the side inclined plate after integral forming. The lower side special-shaped plate consists of three plate surfaces. The horizontal bottom surface welded to the main side plate is 12mm wide, and the angle between the welding and the main side plate is 90°; the inclined plate connected to the horizontal ground is 155mm wide, and the angle between the two is 150°; the inclined plate is connected to the vertical upright plate with a width of 95mm, and the angle between the two is 120°. The top surface of the vertical upright plate is aligned with the bottom surface of the horizontal side rib plate to form a rigidity reinforcement structure.

[0052] The implementation of the present invention also lies in that the transverse side rib plate is made of high-strength plate with a thickness of 6 mm, the cross-section is a right-angled trapezoid, the width of the upper top surface is 46 mm, the lower bottom surface is 51 mm, the outer right-angled surface is welded to the lower special-shaped plate, and the inner inclined surface is welded to the upper inclined plate to form a rigidity reinforced structure.

[0053] The implementation of the present invention also lies in: the reinforcing rib plate is made of high-strength plate with a thickness of 6 mm and a width of 100 mm. After processing, it is evenly arranged at intervals of 200 mm, welded and connected between the upper inclined plate and the lower special-shaped plate, and 24.5 mm away from the main cross plate, to form a rigidity reinforced structure.

[0054] The present invention is also achieved by: the bottom transverse rib plate is made of a high-strength plate with a thickness of 4 mm, and is evenly welded at intervals of 150 mm at the inner joints of the main side plate and the main transverse plate to enhance the strength and rigidity of the structure.

[0055] The present invention is also realized in that: the front and rear end surfaces of the main side plates are welded with chassis longitudinal ribs with a length of 100.5 mm and a width of 18 mm, which are used for welding and connecting with other parts of the skid body to enhance the structural strength.

[0056] The present invention is also achieved by: after the welding of the heterogeneous beam structure is completed, the front and rear end surfaces are integrally milled to ensure that the end surfaces are flat. Specific embodiment:

[0058] In a certain medium-supersonic monorail rocket sled verification test, the mass of the test product was 286kg. During the test, the product sled was relayed by the first-stage sled and the second-stage sled. The product sled was constrained in the track by two integrated sliding shoes. In the early design analysis, the front and rear sliding shoes of the product sled were connected by conventional longitudinal beams. The analysis found that the natural frequency of the composed product sled was low, and in the dynamic analysis, the longitudinal beam was widely damaged due to insufficient bearing capacity. The anisotropic beam structure of the present invention was adopted in the improvement plan.

[0059] By using the heterogeneous beam structure of the present invention, the longitudinal beam structure of the original scheme is changed to the high-rigidity heterogeneous π-shaped beam structure of the present invention, and the first-order response frequency of the sled body modal is increased from 38 Hz of the original structure to 84 Hz, thereby improving the first-order response frequency of the sled body and increasing the structural rigidity of the sled body. Meanwhile, the heterogeneous beam structure is not damaged in the dynamic analysis, and the stress is within the yield limit of the material, meeting the design requirements. Finally, the above structure is used to implement a 7-launch midsonic rocket sled test, which is a complete success.

[0060] Through the application of the present invention, the strength and natural frequency of the monorail rocket sled are greatly improved, and the carrying capacity of the traditional monorail sled is increased from 100Kg to 300Kg, which ensures the successful implementation of a major test and provides strong support for the development and improvement of certain equipment.

Claims

1. A special-shaped longitudinal beam structure of a monorail rocket sled suitable for mesosonic speed, characterized in that: It includes main side plates, main transverse plates, upper inclined plates, lower special-shaped plates, transverse side rib plates, reinforcing rib plates, bottom transverse rib plates and chassis longitudinal ribs; The direction of the rocket sled is defined as the negative direction of the Y axis; the direction perpendicular to the Y axis and pointing upward is the positive direction of the Z axis; the direction perpendicular to the YZ plane and pointing to the left of the rocket sled's direction of movement is the positive direction of the X axis; There are two main side plates, which are located at the lower side of the main transverse plate to form a π-shaped structure; an upper inclined plate is arranged above the main transverse plate; the main side plate is connected to the lower special-shaped plate; the upper inclined plate and the lower special-shaped plate are welded and connected at the top by a transverse side rib plate, and a plurality of reinforcing rib plates are embedded in the middle of the upper inclined plate; a plurality of chassis longitudinal ribs and transverse bottom transverse rib plates are arranged at the bottom of the main transverse plate; The outer side surface of the transverse side rib plate is aligned with the upper end surface of the upper inclined plate to form a rigidity reinforcement structure.

2. The special-shaped longitudinal beam structure of a monorail rocket sled suitable for mesosonic speed according to claim 1, characterized in that: The main side plates are perpendicular to the main transverse plate, and the inner sides of the two main side plates are spaced 155 mm apart.

3. The special-shaped longitudinal beam structure of a monorail rocket sled suitable for mesosonic speed according to claim 1, characterized in that: The main transverse plate has the same length as the main side plate and is made of 6mm thick high-strength plate. It is symmetrically chamfered at 30° in the width direction. The main transverse plate is trapezoidal in width, with a bottom length of 334mm and a top length of 355mm.

4. The special-shaped longitudinal beam structure of a monorail rocket sled suitable for mesosonic speed according to claim 1, characterized in that: The upper inclined plate is made of high-strength plate with the same length as the main cross plate, a width of 160 mm and a thickness of 4 mm. It is welded to the main cross plate on both sides. The angle between the upper inclined plate and the main cross plate is 30°, and an inverted trapezoidal structure is formed after welding. The angle between the upper inclined plate and the main side plate is 60°.

5. The special-shaped longitudinal beam structure of a monorail rocket sled suitable for mesosonic speed according to claim 1, characterized in that: The lower side special-shaped plate is rolled with high-strength plate with the same length as the main side plate and a thickness of 6mm, and is welded to the outer side of the upper side inclined plate after overall forming; the lower side special-shaped plate is composed of three plate surfaces, the horizontal bottom surface welded to the main side plate is 12mm wide, and the welding angle with the main side plate is 90°; the inclined plate connected to the horizontal bottom surface is 155mm wide, and the angle between the two is 150°; the inclined plate is connected to a vertical upright plate with a width of 95mm, and the angle between the two is 120°. The top surface of the vertical upright plate is aligned with the bottom surface of the transverse side rib plate to form a rigidity reinforced structure.

6. The special-shaped longitudinal beam structure of a monorail rocket sled suitable for mesosonic speed according to claim 1, characterized in that: The transverse side rib plate is made of a high-strength plate with a thickness of 6 mm and a right-angled trapezoidal cross-section. The width of the upper top surface is 46 mm and the lower bottom surface is 51 mm. The outer right-angled surface is welded to the lower special-shaped plate, and the inner inclined surface is welded to the upper inclined plate to form a rigidity-reinforced structure.

7. The special-shaped longitudinal beam structure of a monorail rocket sled suitable for mesosonic speed according to claim 1, characterized in that: The reinforcing rib plates are made of high-strength plates with a thickness of 6 mm and a width of 100 mm. After processing, they are evenly arranged at intervals of 200 mm and welded between the upper inclined plate and the lower special-shaped plate, 24.5 mm away from the main cross plate, to form a rigidity-reinforced structure.

8. The special-shaped longitudinal beam structure of a monorail rocket sled suitable for mesosonic speed according to claim 1, characterized in that: The bottom transverse rib plate is made of a high-strength plate with a thickness of 4 mm and is evenly welded at intervals of 150 mm at the inner joints of the main side plates and the main transverse plates to enhance the strength and rigidity of the structure.

9. The special-shaped longitudinal beam structure of a monorail rocket sled suitable for mesosonic speed according to claim 1, characterized in that: The front and rear end surfaces of the main side panels are welded with chassis longitudinal reinforcements with a length of 100.5mm and a width of 18mm to enhance the structural strength.

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