A launch ship guide trough noise reduction and diversion device and design method

Abstract

The present invention discloses a noise reduction and flow guiding device for a launch ship guide trough and a design method, which belongs to the field of rocket launch technology, wherein the noise reduction and flow guiding device for a launch ship guide trough comprises a curved guide plate and a fixed bracket; the bottom surface of the guide plate is fixedly connected to the side edge of the guide trough outlet arranged on the launch ship; the lower end of the guide plate is smoothly transitioned to the edge of the guide trough outlet; the projection of the upper end of the guide plate in the vertical direction at least covers a part of the guide trough; the fixed bracket is fixedly arranged on the launch ship and fixedly connected to the guide plate. The present invention can change the direction of the gas jet at the outlet of the guide trough, thereby reducing the influence of the vibration noise generated by the jet tail flame on the rocket body.

Description

Technical Field

[0001] The invention relates to the technical field of rocket launching, and in particular to a launching ship guide trough noise reduction and guide device and a design method thereof. Background Art

[0002] Sea-based rocket launches are characterized by strong flexibility, good mission adaptability and excellent launch economy. The launch point and landing area can be flexibly selected to meet various orbital launch requirements.

[0003] When launching a carrier rocket at sea, the distance between the guide trough and the carrier rocket is relatively close, because the design of the guide trough is limited by the size of the launch ship. When the rocket is launched, the rocket jet tail flame is perpendicular to the rocket launch ship after passing through the guide trough. The vibration noise generated by the jet tail flame during the launch process will affect the rocket body. At the same time, due to the limitation of the size of the launch ship, it is not possible to reduce the impact of the vibration noise generated by the jet tail flame on the rocket body by expanding the guide trough outlet or moving the guide trough outlet away from the launch pad.

[0004] In view of this, it is necessary to provide a new technical solution to solve the above problems. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a launch ship guide trough noise reduction guide device and design method, which can change the direction of the gas jet at the guide trough outlet, thereby reducing the impact of the vibration noise generated by the jet tail flame on the rocket body.

[0006] A noise reduction and guide device for a guide trough of a launching ship, comprising: a curved guide plate and a fixed bracket; the bottom surface of the guide plate is fixedly connected to the outlet side edge of the guide trough arranged on the launching ship; the lower end of the guide plate is smoothly transitioned to the outlet edge of the guide trough; the projection of the upper end of the guide plate in the vertical direction at least covers a partial area of ​​the guide trough; the fixed bracket is fixedly arranged on the launching ship and fixedly connected to the guide plate.

[0007] Preferably, the guide plate includes an arc portion and a flat portion fixedly connected to each other; the arc portion is connected to the flat portion at its upper end, and a smooth transition is made at the connection; the arc portion is connected to the outlet edge of the guide groove at its lower end, and a smooth transition is made at the connection.

[0008] Preferably, the plates of the guide plate are connected by full penetration welding.

[0009] Preferably, the fixed bracket includes a pulling frame body for pulling the guide plate and a supporting frame body for supporting the guide plate; the pulling frame body is fixedly connected to the plate wall on the injection surface side of the guide plate; the supporting frame body is fixedly connected to the plate wall on the non-injection surface side of the guide plate.

[0010] Preferably, the fixing bracket is formed by welding an I-beam and a channel steel.

[0011] Preferably, the number of the launch ship's guide trough noise reduction and guide devices is the same as the number of the guide trough outlets; the launch ship's guide trough noise reduction and guide devices are located between the guide trough outlet and the rocket.

[0012] Preferably, there are two groups of the launch ship guide trough noise reduction and guide devices; the two groups of the launch ship guide trough noise reduction and guide devices are symmetrically arranged on both sides of the rocket along the axis of the rocket.

[0013] According to another aspect of the present application, a method for designing a noise reduction and flow guiding device for a launch ship flow guiding trough is provided, which is used for designing the noise reduction and flow guiding device for the launch ship flow guiding trough, and comprises:

[0014] Determine the basic structure of the launch ship's guide trough noise reduction and diversion device according to the design requirements, and design the basic three-dimensional model of the launch ship's guide trough noise reduction and diversion device;

[0015] The basic three-dimensional model of the designed launch ship guide trough noise reduction guide device is simulated and analyzed for gas jet flow, and the pressure on the guide plate is measured;

[0016] The maximum pressure on the guide plate is selected as the input condition, and the static analysis of the launch ship's guide trough noise reduction and guide device is carried out to obtain the stress and displacement of the launch ship's guide trough noise reduction and guide device;

[0017] According to the obtained stress data and displacement data, the structure of the launching ship guide trough noise reduction and guide device is adjusted to obtain the final launching ship guide trough noise reduction and guide device.

[0018] Compared with the prior art, this application has at least the following beneficial effects:

[0019] 1. The present invention designs a guide trough noise reduction guide plate on the launching ship, and changes the direction of the gas flow at the guide trough outlet through the guide trough noise reduction guide plate, which can indirectly achieve the purpose of noise reduction, thereby reducing the influence of the vibration noise generated by the jet tail flame on the rocket body.

[0020] 2. The guide plate of the present invention comprises an arc portion and a plane portion connected by a smooth transition. At the same time, the smooth transition setting between the arc portion and the edge of the guide groove outlet can gently change the direction of the jet tail flame ejected from the guide groove outlet and avoid structural mutation.

[0021] 4. The guide plates of the present invention are connected by full penetration welding. This welding method can effectively prevent the jet tail flame from passing through the gap to the rear of the guide plate and affecting the rocket body during rocket launch.

[0022] 5. The fixed bracket of the present invention adopts such a "front-pull and rear-support" structure, which can effectively resist the impact of the jet tail flame at the outlet of the guide trough, and prevent the noise reduction and guide device of the guide trough of the launching ship from being overturned when the rocket is launched at sea. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of the launch ship guide trough noise reduction and guide device from a first perspective of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall structure of the launch ship guide trough noise reduction and guide device from a second perspective of the present invention;

[0026] Figure 3 It is a cross-sectional structural schematic diagram of the launch ship guide trough noise reduction guide device in application state of the present invention;

[0027] Figure 4 It is a top view structural schematic diagram of the launch ship guide trough noise reduction guide device in application state of the present invention;

[0028] Figure 5 This is a simulation diagram of the rocket jet tail flame without the launch ship's guide groove noise reduction and guide device;

[0029] Figure 6 This is a simulation diagram of the rocket gas jet when the launch ship's guide groove noise reduction and guide device is installed;

[0030] Figure 7 This is the pressure cloud diagram on the guide plate of the guide trough noise reduction guide device of the launch ship;

[0031] Figure 8 This is the pressure loading diagram of the guide plate in the guide trough noise reduction guide device of the launch ship;

[0032] Fig. 9 This is the stress diagram of the noise reduction guide device for the launch ship's guide channel;

[0033] Fig.10 This is the combined displacement diagram of the noise reduction and diversion device of the launch ship's diversion chute.

[0034] The above drawings include the following reference numerals:

[0035] 10. deflector; 11. arc portion; 12. plane portion; 20. fixed bracket; 21. pulling frame; 22. supporting frame; 30. guide trough outlet; 40. launching ship; 100. launching ship guide trough noise reduction and guide device. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0037] like Figure 1-Figure 2 Shown and referenced Figure 3 and Figure 4 A launch ship guide trough noise reduction and guide device comprises: a curved guide plate 10 and a fixed bracket 20; the bottom surface of the guide plate 10 is fixedly connected to the side edge of the guide trough outlet 30 arranged on the launch ship 40; the lower end of the guide plate 10 and the edge of the guide trough outlet 30 are smoothly transitioned; the projection of the upper end of the guide plate 10 in the vertical direction at least covers part of the guide trough area; the fixed bracket 20 is fixed on the launch ship 40 and fixedly connected to the guide plate 10. When the rocket is launched, after the jet tail flame is ejected from the guide trough outlet 30, it will change its original flow direction under the action of the guide plate 10, so as to indirectly achieve the purpose of noise reduction, thereby reducing the influence of the jet tail flame on the rocket body.

[0038] Preferably, the guide plate 10 includes an arc portion 11 and a flat portion 12 fixedly connected to each other. The arc portion 11 is connected to the flat portion 12 at its upper end, and the connection is smoothly transitioned. The arc portion 11 is connected to the edge of the guide groove outlet 30 at its lower end, and the connection is smoothly transitioned. Relying on the smooth setting between the arc portion 11 and the flat portion 12 and the arc portion 11 at its lower end and the edge of the guide groove outlet 30, the direction of the jet tail flame ejected from the guide groove outlet 30 can be gently changed to avoid the occurrence of structural mutations.

[0039] Preferably, the plates of the guide plate 10 are connected by full penetration welding. This welding method can effectively prevent the jet tail flame from passing through the gap to the rear of the guide plate 10 and affecting the rocket body during rocket launch.

[0040] The fixed bracket 20 includes a pulling bracket body 21 for pulling the guide plate 10 and a supporting bracket body 22 for supporting the guide plate 10. The pulling bracket body 21 is fixedly connected to the plate wall on the injection side of the guide plate 10, and the supporting bracket body 22 is fixedly connected to the plate wall on the non-injection side of the guide plate 10. The fixed bracket 20 adopts this "front pulling and rear supporting" structure to effectively resist the impact of the jet tail flame ejected from the guide groove outlet 30, and prevent the guide groove noise reduction and guide device of the launch ship from being overturned when the rocket is launched at sea.

[0041] Preferably, the fixing bracket 20 is formed by welding an I-beam and a channel steel. The I-beam and the channel steel have high strength and rigidity, and the materials are easy to obtain and low in cost. The welding technology is relatively mature, and the strength and rigidity of the launch ship guide trough noise reduction guide device can be ensured while effectively reducing the production cost.

[0042] The number of the launching ship's guide trough noise reduction and guide devices is the same as the number of the guide trough outlets 30, and the launching ship's guide trough noise reduction and guide devices are located between the guide trough outlets 30 and the rocket, blocking the jet tail flame ejected from the guide trough outlets 30 from the rocket.

[0043] In this embodiment, if Figure 3 and Figure 4 As shown, there are two groups of launch ship guide trough noise reduction guide devices 100, and the two groups of launch ship guide trough noise reduction guide devices 100 are symmetrically arranged on both sides of the rocket along the rocket axis. It should be noted that, according to the different settings of the launch ship and the guide trough outlet 30, the distance between the guide trough outlet 30 on both sides of the rocket axis and the rocket may be different. In this case, the two groups of launch ship guide trough noise reduction guide devices 100 symmetrical along the rocket axis will inevitably be adjusted accordingly, so that they are fixedly connected to the edge of the guide trough outlet 30, thereby changing the flow direction of the jet tail flame. Similarly, if more than two groups of guide trough outlets 30 are provided on the launch ship, the launch ship guide trough noise reduction guide devices 100 have the same number as the guide trough outlets 30, and their positions are inevitably adapted to each guide trough outlet 30.

[0044] According to another aspect of the present application, a method for designing a noise reduction and flow guiding device for a launch ship flow guiding trough is provided, which is used for designing the noise reduction and flow guiding device for the launch ship flow guiding trough, and comprises:

[0045] According to the design requirements, the basic structure of the launch ship guide trough noise reduction guide device is determined, and the basic three-dimensional model of the launch ship guide trough noise reduction guide device is designed. The gas jet simulation analysis is carried out on the designed basic three-dimensional model of the launch ship guide trough noise reduction guide device, and the pressure on the guide plate is measured.

[0046] When determining the basic structure of the launch ship's guide trough noise reduction and guide device, it is determined that the guide plate 10 adopts a curved structure. At the same time, based on the rocket model, the rocket engine thrust and the guide trough data, the flow of the jet tail flame can be determined, and the stress condition of the launch ship's guide trough noise reduction and guide device can be calculated, thereby determining the basic structure of the launch ship's guide trough noise reduction and guide device and the dimensions of each component.

[0047] like Figure 5 and Figure 6 As shown, it can be clearly seen that after installing the guide groove noise reduction guide plate, the jet development trend of the jet tail flame at the guide groove outlet can be effectively changed. Therefore, designing a launch ship guide groove noise reduction guide device is effective for changing the flow direction of the jet tail flame.

[0048] In addition, it can be seen from the pressure analysis that the maximum pressure on the guide plate in this embodiment is 104000Pa. Figure 7 shown.

[0049] The maximum pressure on the guide plate is selected as the input condition, and the static analysis of the noise reduction and guide device of the guide trough of the launch ship is carried out to obtain the stress and displacement of the noise reduction and guide device of the guide trough of the launch ship.

[0050] The bottom of the launch ship's guide trough noise reduction guide device is fixed to simulate the state of the launch ship's guide trough noise reduction guide device being firmly welded on the deck, and the maximum pressure is used as the input condition to uniformly load the guide plate to provide the conditions for stress and displacement analysis of the launch ship's guide trough noise reduction guide device, such as Figure 8 shown.

[0051] Finite element analysis shows that the yield stress of the guide plate is 2.206×e 8 N / m 2 , the maximum stress is 2.290×e 8 N / m 2 , but the maximum stress is at a single point, and the overall stress of the structure is 1.832--1.145×e 8 N / m 2 The maximum combined displacement is 8.68 mm at the top of the curved guide plate. Fig. 9 and Fig.10 .

[0052] According to the obtained stress data and displacement data, the structure of the launching ship guide trough noise reduction and guide device is adjusted to obtain the final launching ship guide trough noise reduction and guide device.

[0053] It can be seen from the obtained stress data and displacement data that when the maximum pressure is taken as the input condition and the area of ​​the guide plate is large, the stress and displacement of the launch ship guide trough noise reduction and guide device can meet the requirements. Therefore, there is no need to adjust the components and the corresponding sizes of the components. The designed launch ship guide trough noise reduction and guide device can meet the launch requirements of this type of rocket.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0056] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A launch ship guide trough noise reduction and diversion device, characterized in that: include: A curved guide plate and a fixed bracket; the bottom surface of the guide plate is fixedly connected to the edge of the guide trough outlet provided on the launch ship; the lower end of the guide plate is smoothly transitioned to the edge of the guide trough outlet; the projection of the upper end of the guide plate in the vertical direction at least covers a part of the guide trough; the fixed bracket is fixedly arranged on the launch ship and fixedly connected to the guide plate; The guide plate comprises an arc portion and a flat portion fixedly connected to each other; the arc portion is connected to the flat portion at its upper end, and a smooth transition is made at the connection; the arc portion is connected to the outlet edge of the guide groove at its lower end, and a smooth transition is made at the connection; The fixed bracket includes a pulling frame body for pulling the guide plate and a supporting frame body for supporting the guide plate; the pulling frame body is fixedly connected to the plate wall on the injection surface side of the guide plate; the supporting frame body is fixedly connected to the plate wall on the non-injection surface side of the guide plate.

2. The launch ship guide trough noise reduction and guide device according to claim 1, characterized in that: The plates of the guide plate are connected by full penetration welding.

3. The launch ship guide trough noise reduction and guide device according to claim 1, characterized in that: The fixing bracket is formed by welding an I-beam and a channel steel.

4. The launch ship guide trough noise reduction and guide device according to any one of claims 1 to 3, characterized in that: The number of the launch ship's guide trough noise reduction and guide devices is the same as the number of the guide trough outlets; the launch ship's guide trough noise reduction and guide devices are located between the guide trough outlet and the rocket.

5. The launch ship guide trough noise reduction and guide device according to claim 4, characterized in that: The launch ship guide trough noise reduction and diversion devices are in two groups; the two groups of launch ship guide trough noise reduction and diversion devices are symmetrically arranged on both sides of the rocket along the axis of the rocket.

6. A method for designing a noise reduction and flow guiding device for a launch ship, characterized in that: The design of the launch ship guide trough noise reduction and guide device according to claim 5 includes: Determine the structure of the launch ship's guide trough noise reduction and diversion device according to the design requirements, and design the basic three-dimensional model of the launch ship's guide trough noise reduction and diversion device; The basic three-dimensional model of the designed launch ship guide trough noise reduction guide device is simulated and analyzed for gas jet flow, and the pressure on the guide plate is measured; The maximum pressure on the guide plate is selected as the input condition, and the static analysis of the launch ship's guide trough noise reduction and guide device is carried out to obtain the stress and displacement of the launch ship's guide trough noise reduction and guide device; According to the obtained stress data and displacement data, the structure of the launch ship guide trough noise reduction and guide device is adjusted to obtain the final launch ship guide trough noise reduction and guide device; Among them, the structure of the noise reduction and guide device of the guide trough of the launching ship includes: a curved guide plate and a fixed bracket; the bottom surface of the guide plate is fixedly connected to the edge of the guide trough outlet side arranged on the launching ship; the lower end of the guide plate is smoothly transitioned to the edge of the guide trough outlet; the projection of the upper end of the guide plate in the vertical direction at least covers a partial area of ​​the guide trough; the fixed bracket is fixed on the launching ship and fixedly connected to the guide plate.

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