Multi-functional and multi-purpose rotary table

Abstract

The application discloses a multifunctional and multipurpose rotating table, which comprises a rotating platform, a working bin and a ground foundation; a center pivot is arranged at the center of the rotating platform; the bottom of the center pivot is rotationally connected with the ground foundation, and the top of the center pivot is fixedly connected with an antenna framework, thereby forming a first main force transmission path of the rotating table; a bin body framework of the working bin uniformly surrounds the center pivot and is fixedly connected with the center pivot; a roller combination of the rotating platform is connected with the end of the bin body framework, thereby forming a second main force transmission path of the rotating table; the roller combination can move along a track on the ground foundation; the structural load bearing performance of the first main force transmission path and the second main force transmission path is balanced; the bin body framework is radially arranged, thereby dividing the working bin into multiple areas; and antenna system equipment is divided according to functions and is reasonably arranged in the multiple areas. The multifunctional and multipurpose rotating table disclosed by the application not only improves the overturning resistance of the rotating table, but also has high system integration.

Description

Technical Field

[0001] This invention relates to the field of broadcast antenna technology, specifically to a multi-functional multiplexed turntable. Background Technology

[0002] The shortwave broadcasting system mainly consists of an antenna system, a transmitter system, a radio frequency transmission system, a turntable, a fire protection and security system, a rotating grounding system, a power distribution system, and a comprehensive intelligent monitoring system. Among these, the transmitter system, radio frequency transmission system, rotating system, fire protection and security system, rotating lightning protection and grounding system, power distribution system, antenna control system, environmental control system, and comprehensive intelligent monitoring system are integrated and installed inside the turntable according to the system's operating requirements, rotating synchronously with the turntable.

[0003] According to literature review, there are generally three types of equipment layouts for large-scale rotating antenna systems: ① concrete building + rotating antenna; ② wheel-rail turntable + equipment cabin + antenna.

[0004] The "concrete structure + rotating antenna" approach involves making the cylindrical antenna frame rotate, meaning the transmission system, rotating joints, etc., are installed inside the tube, with the bottom structure serving only as a supporting foundation. The advantages of this approach are high integration and low cost, but it also brings several disadvantages: a) poor maintainability of the internal transmission system; b) the need to install the RF transmission system, antenna control system, and environmental control system on platforms at different heights inside the tube, requiring personnel to climb up and down for debugging and maintenance, resulting in low reliability, insufficient operability, poor maintainability, lack of ergonomics, serious installation problems, and long construction periods. Furthermore, the integration of equipment inside the tube inadvertently raises the center of gravity of the entire antenna system, reducing its resistance to tipping.

[0005] The "wheel-rail turntable + equipment cabin + antenna" solution involves using a wheel-rail turntable for rotation. The antenna system is rigidly connected to the turntable and rotates with it. The transmitter system, RF transmission system, rotation system, fire protection and security system, rotation lightning protection and grounding system, power distribution system, antenna control system, environmental control system, and overall intelligent monitoring system are installed in the equipment cabin on the turntable. Alternatively, a simple building may be added to the turntable for equipment installation. This layout improves overturning resistance, reduces leakage risks from high-frequency and low-frequency rotating joints, and enhances system reliability. However, the presence of individual, discrete equipment cabins reduces system integration; furthermore, the cabin or simple building structure limits shielding and protection for the equipment. Summary of the Invention

[0006] The technical problem to be solved by this invention is that the existing equipment layout for rotating antenna systems cannot simultaneously satisfy the requirements of strong anti-overturning capability and high system integration.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] A multi-functional reusable turntable includes a rotating platform 100, a work chamber 200, and a ground foundation 300; a central pivot 110 is provided at the center of the rotating platform 100;

[0009] The bottom of the central pivot 110 is rotatably connected to the ground foundation 300, and the top is fixedly connected to the antenna frame 400, forming the first main force transmission path of the turntable; the frame 210 of the working chamber 200 is uniformly surrounded around the central pivot 110 and fixedly connected to it; and the roller assembly 120 of the rotating platform 100 is connected to the end of the frame 210, forming the second main force transmission path of the turntable; and the roller assembly 120 can move along the track on the ground foundation 300; and the structural load-bearing capacity of the first main force transmission path and the second main force transmission path is balanced;

[0010] The radial frame 210 divides the work chamber 200 into multiple areas, and the antenna system equipment is rationally arranged in multiple areas according to its function; the multiple areas include the transmitter equipment room, the radio frequency transmission equipment room, the display and control hall and the integrated room.

[0011] Advantages: The main load-bearing structure of the turntable integrates equipment installation. Based on the characteristic that the load of the antenna system is concentrated on the central pivot of the turntable, it abandons the previous turntable load-bearing box beam uniform distribution structure. Its main load-bearing structure consists of the central pivot and four connected radial chamber frame structures. Four sets of load-bearing rollers are installed at the ends of the four radial chamber frame structures, which together with the central pivot bear the load of the entire antenna system.

[0012] Four radial frame structures divide the square turntable into four main functional areas: transmitter equipment room, radio frequency transmission equipment room, display and control hall, and integrated area. The transmitter system, radio frequency transmission system, rotation system, fire protection and security system, rotation lightning protection and grounding system, power distribution system, antenna control system, environmental control system, and overall intelligent monitoring system are integrated and installed in the four functional areas according to the usage requirements of the shortwave broadcasting system, improving the system's reliability, maintainability, and safety.

[0013] In one embodiment of the present invention, the plurality of regions are arranged as follows:

[0014] The transmitter equipment room and the radio frequency transmission equipment room are arranged adjacent to each other. On the one hand, the transmission feed tube between the equipment in the transmitter equipment room and the radio frequency transmission equipment room can be shortened to reduce transmission loss. On the other hand, the transmitter equipment room and the radio frequency transmission equipment room have electromagnetic shielding requirements. Concentrating the shielding decoration can reduce the difficulty and cost of electromagnetic shielding and shorten the construction period.

[0015] The transmitter equipment room and the display and control hall are arranged opposite each other. The equipment in the transmitter equipment room is the main source of electromagnetic radiation and noise, while the display and control hall is the main area for personnel activities and work. The opposite arrangement can create a relatively safe and comfortable working environment.

[0016] The integrated room is adjacent to both the transmitter equipment room and the display and control hall; it is further divided into a power distribution room and a rest room; a pedestrian passageway connects the power distribution room and the rest room, and the power distribution room's proximity to the transmitter equipment room facilitates power supply to both rooms while reducing the difficulty of cable routing. The rest room, adjacent to the display and control hall, provides a place for staff to rest during long hours of daily work and nighttime missions.

[0017] With the central pivot 110 as the center of rotation, a corridor is provided, and multiple areas are provided with a door that connects to the corridor; and an elevator shaft is formed inside the central pivot 110, which is equipped with an elevator that can lead to the antenna frame, so that maintenance personnel can directly reach the crossarm on the tower from inside the turntable, and then to the antenna system to inspect and maintain the equipment there.

[0018] In one embodiment of the present invention, the outer wall of the work chamber 200 is removable, and the outer walls corresponding to the transmitter equipment room and the radio frequency transmission equipment room are reserved with entrances and exits to facilitate the installation and subsequent maintenance of large equipment; and two escape ladders are also provided on the turntable, one leading to the bottom of the turntable and the other leading to the outside of the turntable, so that in the event of a sudden fire, typhoon or earthquake, the staff in the display and control hall can be transferred to the ground safety area as quickly as possible.

[0019] In one embodiment of the present invention, the main beam structure of the rotating platform 100 is fixedly connected to the central pivot 110 and the silo frame 210.

[0020] In one embodiment of the present invention, the roller assembly 120 is connected to the end of the hopper frame 210 by an adjustable base; and the hopper frame 210 adopts a multi-partition design.

[0021] In one embodiment of the present invention, in order to achieve a balance in the structural bearing capacity of the first main force transmission path and the second main force transmission path, a stiffness matching optimization design method based on key parameters is used for structural optimization, including the following steps:

[0022] S100, based on the turntable function, establish the initial geometric model of the central pivot and the frame of the warehouse, and establish the initial finite element optimization model based on the initial geometric model;

[0023] S200, based on the mechanical analysis conditions, determine the load distribution target between the central pivot and the silo frame;

[0024] S300, determine the design variables based on the first main force transmission path and the second main force transmission path;

[0025] S400, based on the load distribution target and design variables, obtain the optimization target; and analyze the initial finite element optimization model based on the optimization target to obtain the initial discrete variable matrix of the optimization target;

[0026] S500, based on the initial discrete variable matrix, iteratively update the initial finite element optimization model to obtain the response matrix of the optimization objective;

[0027] S600 uses the least squares method to perform optimization data fitting on the initial discrete variable matrix and response matrix to obtain the response surface function model of the optimization objective;

[0028] S700 determines the optimal design variable values ​​based on the response surface function model, updates the initial geometric model based on the optimal design variable values, and verifies it using finite element analysis, thereby achieving a reasonable allocation of the turntable's load-bearing capacity.

[0029] In one embodiment of the present invention, the load-bearing distribution targets include: the bottom support force N1 of the central pivot 110, and the support force N2 at the connection position of the silo frame 210 and the roller assembly 120; the design variables include: the wall thickness V1 of the central pivot 110, the thickness V2 of the internal longitudinal ribs 211 of the silo frame 210, the thickness V3 of the internal transverse ribs 212 of the silo frame 210, and the thickness V4 of the outer skin 213 steel plate of the silo frame 210.

[0030] In one embodiment of the present invention, when the bottom support force N1 of the central pivot 110 is selected as the optimization target, the optimization target is: N1(V i )=(1±C)F1; where i=1,2,3,4; C is the allowable deviation coefficient; F1 is the support force designed at the bottom of the central pivot.

[0031] In one embodiment of the present invention, obtaining the initial discrete variable matrix of the optimization objective includes:

[0032] S410, if N1 < (1-C)F1, then the obtained initial discrete variable matrix V is:

[0033] S420, if N1 < (1-C)F1, then the initial discrete variable matrix V is obtained as follows:

[0034] Where t is a discrete change.

[0035] In one embodiment of the present invention, the response surface function model with the bottom support force N1 of the central pivot 110 as the optimization objective is as follows: Where k0 is the fitting constant; k i V represents the response coefficient of the i-th design variable; i Let i be the i-th design variable.

[0036] In one embodiment of the present invention, based on the target constraint conditions between the bottom support force N1 of the central pivot 110 and the support force N2 at the connection position of the hopper frame 210 and the roller assembly 120, as well as the stress constraint conditions of the entire turntable system, the response surface function model of the support force N2 at the connection position of the hopper frame 210 and the roller assembly 120 is obtained; the initial geometric model is updated with the response surface function models of the two load-bearing distribution targets.

[0037] In one embodiment of the present invention, the target constraint condition is: stN1+N2=F2; the stress constraint condition is: S max (x i )≤230MPa,x i ∈D; where F2 is the total load-bearing capacity of the turntable; x i S represents the nodes at various locations in the finite element model, D represents the entire model domain; S max This represents the maximum stress.

[0038] In one embodiment of the present invention, the roller assembly 120 adopts a four-point layout, with a total of 4 sets of roller assemblies 120; each set of roller assemblies 120 includes a driving roller 121, a driven roller 122 and a roller drive device 123; the roller drive device 123 is connected to the driving roller 121 and provides power to the driving roller 121, and the driven roller 122 moves in the same direction as the driving roller 121; and the driving roller 121 and the driven roller 122 are conical in shape.

[0039] Compared with the prior art, the beneficial effects of the present invention are: the present invention is applicable to ultra-high antenna frames, has a large turntable structure with strong anti-overturning capability, and adopts a high reliability design by using a central pivot bearing and a ground support of four roller assemblies.

[0040] The first main force transmission path of the present invention effectively transmits the load of the antenna frame on the top of the turntable to the ground through the central position, and the bearing seat at the connection between the central pivot and the ground foundation adopts the connection form of anchor bolts embedded in the cement seat, which greatly improves the overall rigidity and stability of the antenna frame.

[0041] The second main force transmission path of the present invention connects the main load-bearing beam of the turntable platform to the silo frame by welding, so that the load of the turntable itself is evenly transmitted to the ground foundation through the second main force transmission path, ensuring the stability of the roller combination drive.

[0042] The structural stiffness matching optimization design method based on target load adjustment was adopted. By determining the target load distribution, adjusting the structural design parameters, and verifying the specific process of finite element simulation, it was ensured that the strength of the final main load-bearing structure met the material design requirements, the stiffness met the accuracy requirements, and the combined load-bearing design of the central pivot and roller was reasonable.

[0043] In the structural stiffness matching optimization design method adopted, the efficiency of fitting calculation and the accuracy of optimization results are improved by using a discrete design variable unidirectional control method.

[0044] The turntable, which integrates equipment installation into its main load-bearing structure, abandons the previous uniform distribution of load-bearing box beams, taking into account the characteristic that the antenna system load is concentrated on the central pivot of the turntable. Its main load-bearing structure consists of the central pivot and four connected radial chamber frame structures. In terms of spatial layout, on the one hand, the transmission feed tubes between the transmitter equipment room and the radio frequency transmission equipment room can be shortened, reducing transmission loss, and shielding decoration can be carried out in a concentrated manner, reducing the difficulty and cost of electromagnetic shielding and shortening the construction period; on the other hand, the transmitter equipment room and the display and control hall are arranged opposite each other, which can create a relatively safe and comfortable working environment.

[0045] Four sets of load-bearing rollers are evenly installed at the ends of four radial chamber frame structures. Each set of rollers consists of a drive wheel and a driven wheel, thus ensuring the accuracy and stability of the transmission. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the turntable and antenna frame according to an embodiment of the present invention.

[0047] Figure 2 This is a schematic diagram of a multifunctional reusable turntable according to an embodiment of the present invention.

[0048] Figure 3 This is a schematic diagram of the roller assembly according to an embodiment of the present invention.

[0049] Figure 4 This is a schematic diagram of the layout of multiple regions according to an embodiment of the present invention.

[0050] Figure 5 This is a schematic diagram of an elevator according to an embodiment of the present invention.

[0051] Figure 6 This is a schematic diagram of a detachable exterior wall according to an embodiment of the present invention.

[0052] Figures 7 to 11 This is a schematic diagram of an escape ladder according to an embodiment of the present invention.

[0053] Figure 12 This is a schematic diagram of the roller assembly according to an embodiment of the present invention.

[0054] Figure 13 This is a schematic diagram of the semi-conical angle surface of the roller according to an embodiment of the present invention.

[0055] Figure 14 This is a flowchart illustrating the structural optimization process of the stiffness matching optimization design method for the turntable in an embodiment of the present invention. Detailed Implementation

[0056] To facilitate understanding of the technical solution of the present invention by those skilled in the art, the technical solution of the present invention will now be further described in conjunction with the accompanying drawings.

[0057] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] Please see Figures 1 to 4 As shown, the present invention discloses a multifunctional reusable turntable, including a rotating platform 100, a working chamber 200, and a ground foundation 300. A central pivot 110 is disposed at the center of the rotating platform 100. The bottom of the central pivot 110 is rotatably connected to the ground foundation 300, and the top is fixedly connected to an antenna frame 400, forming the first main force transmission path of the turntable. The chamber frame 210 of the working chamber 200 is uniformly arranged around the central pivot 110 and fixedly connected to it. A roller assembly 120 of the rotating platform 100 is connected to the end of the chamber frame 210, forming the second main force transmission path of the turntable. The roller assembly 120 can move along a track on the ground foundation 300, and the structural load-bearing capacity of the first and second main force transmission paths is balanced.

[0059] The radial frame 210 divides the working chamber 200 into multiple areas, and the antenna system equipment is rationally arranged in multiple areas according to its function.

[0060] Specifically, the bottom of the central pivot 110 is connected to the ground foundation 300 via bearings, while the top is directly flange-fixed to the antenna frame 400, thus establishing the primary force transmission path of the main structure, directly transmitting force to the ground foundation 300 via the central pivot 110. The central pivot 110 is welded to the hull frame 210 on all four sides. The hull frame 210 employs a multi-partition design, optimizing the density and distribution of the plates based on load conditions to ensure structural rigidity. The main beam structure of the rotating platform 100 is welded to the central pivot 110 and the hull frame 210 to ensure the load-bearing safety of the main working area.

[0061] The roller assembly 120 is connected to the end of the chamber frame 210 via an adjustable base, thus constructing a second main force transmission path for the main structure, i.e., transmitting force from the chamber frame 210 and roller assembly 120 to the ground foundation 300. The roller assembly 120 has its own drive motor, which controls the directional rotation of the entire turntable.

[0062] In this embodiment, the roller assembly 120 adopts a four-point layout, with a total of four roller assemblies 120. Each roller assembly 120 includes a driving roller 121, a driven roller 122, and a roller drive device 123. The roller drive device 123 is connected to the driving roller 121 and provides power to the driving roller 121. The driven roller 122 moves in the same direction as the driving roller 121, and both the driving roller 121 and the driven roller 122 are conical in shape. The semi-conical angle of the driving roller 121 and the driven roller 122 is 2.292°. Figure 12 and Figure 13 As shown.

[0063] Please see Figure 1 , Figure 2 , Figures 4 to 13 As shown, in one embodiment of the present invention, the multiple areas include a transmitter equipment room, a radio frequency transmission equipment room, a display and control hall, and a comprehensive room. The layout of the multiple areas is as follows:

[0064] The transmitter equipment room and the radio frequency transmission equipment room are arranged adjacent to each other. This arrangement shortens the transmission feed tubes between the equipment in the transmitter equipment room and the radio frequency transmission equipment room, reducing transmission loss. Furthermore, since both rooms have electromagnetic shielding requirements, centralized shielding can reduce the difficulty and cost of electromagnetic shielding and shorten the construction period. Figure 4 As shown.

[0065] The transmitter equipment room and the display and control hall are arranged opposite each other. The equipment in the transmitter equipment room is the main source of electromagnetic radiation and noise, while the display and control hall is the main area for personnel activities and work. The opposite arrangement can create a relatively safe and comfortable working environment.

[0066] The integrated room is adjacent to both the transmitter equipment room and the display and control hall, and is divided into a power distribution room and a rest room, with a pedestrian passage connecting them. The power distribution room's proximity to the transmitter equipment room facilitates power supply to both rooms and reduces the difficulty of cable routing. The rest room, adjacent to the display and control hall, provides a rest area for staff during long workdays and nighttime missions.

[0067] A corridor is provided with central pivot 110 as the center of rotation, and multiple areas are interconnected by a door. An elevator shaft is formed inside central pivot 110, providing access to the antenna frame. Specifically, the elevator has multiple floors, allowing maintenance personnel to directly access the crossarms on the tower from inside the turntable, and then to the antenna system for maintenance and repair. Figure 4 and Figure 5 As shown.

[0068] Please see Figure 1 , Figures 4 to 13 As shown, in one embodiment of the present invention, the outer wall of the work chamber 200 is removable, and entrances and exits are reserved at the corresponding outer walls of the transmitter equipment room and the radio frequency transmission equipment room to facilitate the installation and subsequent maintenance of large equipment, such as... Figure 6 As shown. The turntable is also equipped with two escape elevators, one leading to the bottom of the turntable and the other to the outside. In the event of a sudden fire, typhoon, or earthquake, staff in the control hall can quickly evacuate to a safe area on the ground. Figures 7 to 11 As shown. In addition, an entrance hall door is located at the end of the pedestrian passage, and double staircases leading to the turntable are located outside the entrance hall door, as shown. Figure 7 and Figure 9 As shown. Specifically, a rotation lightning protection grounding device is installed around the turntable to ensure reliable and safe grounding when the turntable is rotating.

[0069] Please see Figures 1 to 14 As shown, in one embodiment of the present invention, there are two main force transmission paths. In order to balance the structural bearing capacity, a stiffness matching optimization design method based on key parameters is used for structural optimization, including the following steps:

[0070] S100, based on the turntable function, establish the initial geometric model of the central pivot and the frame of the warehouse, and establish the initial finite element optimization model based on the initial geometric model.

[0071] In this embodiment, for example, a geometric model and a finite element optimization model are established in the ANSYS platform.

[0072] S200, based on the mechanical analysis conditions, determines the load distribution target between the central pivot and the silo frame.

[0073] In this embodiment, the load distribution targets include: the bottom support force N1 of the central pivot 110, and the support force N2 at the connection position of the silo frame 210 and the roller assembly 120.

[0074] S300, determine the design variables based on the first main force transmission path and the second main force transmission path.

[0075] In this embodiment, the design variables include: the wall thickness V1 of the central pivot 110, the thickness V2 of the internal longitudinal ribs 211 of the silo frame 210, the thickness V3 of the internal transverse ribs 212 of the silo frame 210, and the thickness V4 of the outer skin 213 steel plate of the silo frame 210.

[0076] S400, based on the load distribution target and design variables, obtain the optimization target; and analyze the initial finite element optimization model based on the optimization target to obtain the initial discrete variable matrix of the optimization target.

[0077] In this embodiment, there are two load distribution objectives. Therefore, one load distribution objective is first selected as the optimization objective, and the response analysis between the optimization objective and the design variables is obtained. Then, based on the constraints, the response between the other load distribution objective and the design variables is obtained. Specifically, there is no priority order between the two load distribution objectives. In this embodiment, when the bottom support force N1 of the central pivot 110 is selected as the optimization objective, the optimization objective is: N1(V i )=(1±C)F1; where i=1,2,3,4; C is the allowable deviation coefficient, and F1 is the design support force at the bottom of the central pivot. The deviation coefficient is taken as 0.05.

[0078] Obtaining the initial discrete variable matrix of the optimization objective includes:

[0079] S410, if N1 < (1-C)F1, then the obtained initial discrete variable matrix V is:

[0080] S420, if N1 < (1-C)F1, then the initial discrete variable matrix V is obtained as follows:

[0081] Where t is a discrete variable, which is generally taken as 1 according to the actual situation of engineering design.

[0082] S500, based on the initial discrete variable matrix, iteratively update the initial finite element optimization model to obtain the response matrix of the optimization objective.

[0083] S600 uses the least squares method to perform optimization data fitting on the initial discrete variable matrix and response matrix to obtain the response surface function model of the optimization objective.

[0084] Specifically, the response surface function model with the bottom support force N1 of the central pivot 110 as the optimization objective is as follows: Where k0 is the fitting constant; k i V represents the response coefficient of the i-th design variable; i Let i be the i-th design variable.

[0085] S700 determines the optimal design variable values ​​based on the response surface function model, updates the initial geometric model based on the optimal design variable values, and verifies it using finite element analysis, thereby achieving a reasonable allocation of the turntable's load-bearing capacity.

[0086] In this embodiment, there are two load distribution targets. Therefore, based on the target constraint conditions between the bottom support force N1 of the central pivot 110 and the support force N2 at the connection position of the chamber frame 210 and the roller assembly 120, as well as the stress constraint conditions of the entire turntable system, the response surface function model of the support force N2 at the connection position of the chamber frame 210 and the roller assembly 120 is obtained. The initial geometric model is updated with the response surface function models of the two load distribution targets.

[0087] Specifically, the target constraint condition is: stN1 + N2 = F2; the stress constraint condition is: S max (x i )≤230MPa,x i ∈D; where F2 is the total load-bearing capacity of the turntable; x i S represents the nodes at various locations in the finite element model, D represents the entire model domain; S max This represents the maximum stress.

[0088] Please see Figures 1 to 14 As shown, this invention utilizes a high-power broadcast antenna, characterized by its large array size and heavy weight. It must withstand the effects of single or multiple severe weather conditions such as wind, rain, snow, ice, and earthquakes, especially the destructive power of high wind speeds approaching 55.5 m / s. Under these conditions, the antenna array experiences horizontal wind forces as high as 147.7 kN. To avoid additional complex internal stresses on the structure due to the heavy load, it is theoretically necessary to achieve the convergence of three centers: the optimal wind moment center, the center of gravity, and the center of rotation. Furthermore, the force transmission methods and paths should be simplified as much as possible, minimizing transmission forms and shortening paths. In the specific design, the connection between the rotating platform 100, the working chamber 200, and the ground foundation 300 ensures the consistency of the force direction of the roller assembly 120. The frame 210 can evenly transmit force to each roller assembly 120. In this scheme, the first main force transmission path and the second main force transmission path divide the force into two forms: axial force and radial force. The axial force is perpendicular to the pressure and is borne by the roller assembly 120. The radial force is mainly overcome by the central pivot 110. At the same time, the roller assembly 120 plays an anti-overturning role.

[0089] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0090] The above embodiments are merely examples of implementation methods of the invention. The scope of protection of the present invention is not limited to the above embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A multifunctional multiplexed turntable, characterized by, The application relates to a rotating platform (100), a working cabin (200) and a ground foundation (300); a central pivot (110) is arranged at the center of the rotating platform (100); the bottom of the central pivot (110) is rotationally connected with the ground foundation (300), the top is fixedly connected with an antenna framework (400), a first main force transmission path of the rotating platform is formed; the cabin body framework (210) of the working cabin (200) uniformly surrounds the central pivot (110) and is fixedly connected with the central pivot (110); the roller combination (120) of the rotating platform (100) is connected with the end of the cabin body framework (210), a second main force transmission path of the rotating platform is formed; the roller combination (120) can move along the track of the ground foundation (300); and the structural load bearing performance of the first main force transmission path and the second main force transmission path is balanced; the cabin body framework (210) is radially arranged, the working cabin (200) is divided into multiple areas, and antenna system equipment is reasonably arranged in the multiple areas according to functions; the multiple areas include a transmitter equipment room, a radio frequency transmission equipment room, a display control hall and a comprehensive room; in order to balance the structural load bearing performance of the first main force transmission path and the second main force transmission path, a stiffness matching optimization design method based on key parameters is used for structural optimization, and the method comprises the following steps: S100, according to the function of the rotating platform, an initial geometric model of the central pivot and the cabin body framework is established, and an initial finite element optimization model is established according to the initial geometric model; S200, according to the mechanical analysis working condition, a load distribution target of the central pivot and the cabin body framework is determined; S300, according to the first main force transmission path and the second main force transmission path, a design variable is determined; S400, according to the load distribution target and the design variable, an optimization target is obtained; and according to the optimization target, the initial finite element optimization model is analyzed to obtain an initial discrete variable matrix of the optimization target; S500, according to the initial discrete variable matrix, the initial finite element optimization model is iteratively updated to obtain a response matrix of the optimization target; S600, a least square method is used to optimize and fit the initial discrete variable matrix and the response matrix to obtain a response surface function model of the optimization target; S700, the optimal design variable value is determined according to the response surface function model, the initial geometric model is updated according to the optimal design variable value, and finite element analysis is used for verification, so that the reasonable distribution of the load bearing performance of the rotating platform is realized.

2. The multifunctional multiplexed turntable of claim 1, wherein, The layout mode of the multiple areas is as follows: the transmitter equipment room and the radio frequency transmission equipment room are adjacently arranged; the transmitter equipment room and the display control hall are oppositely arranged; the comprehensive room is adjacent to the transmitter equipment room and the display control hall respectively; the comprehensive room is divided into a power distribution room and a rest room; a pedestrian passageway is arranged between the power distribution room and the rest room, and the power distribution room is adjacent to the transmitter equipment room; The center pivot (110) is set as a rotating center, a return corridor is arranged, and a plurality of areas are each provided with a door to interconnect with the return corridor; and an elevator shaft is formed in the center pivot (110), and an elevator capable of accessing an antenna framework is arranged.

3. The multifunctional multiplexed turntable of claim 2, wherein, The outer wall of the working cabin (200) is detachable, and the corresponding outer walls of the transmitter equipment room and the radio frequency transmission equipment room are reserved with import and export; and two escape ladders are further arranged on the turntable, one of which leads to the bottom of the turntable, and the other of which leads to the outside of the turntable.

4. The multifunctional multiplexed turntable of claim 1, wherein, The force distribution target includes: the center pivot (110) bottom support force N1, the warehouse body framework (210) and the roller combination (120) connection position support force N2; the design variable includes: the center pivot (110) wall thickness V 1, the thickness of the internal longitudinal rib (211) of the warehouse body framework (210) V 2, the thickness of the internal transverse rib (212) of the warehouse body framework (210) V 3, the thickness of the outer skin (213) of the warehouse body framework (210) V 4.

5. The multifunctional multiplexed turntable of claim 4, wherein, When the bottom support force N1 of the center pivot (110) is selected as the optimization objective, the optimization objective is: ; wherein, i = 1, 2, 3, 4; C is the allowable deviation coefficient; is the support force of the center pivot bottom design.

6. The multifunctional multiplexed turntable of claim 5, wherein, An initial discrete variable matrix of the optimization target is obtained, including: S410, if N1 < (1-C)F1, the initial discrete variable matrix obtained V is: ; S420, if N1> (1-C)F1, the initial discrete variable matrix obtained V is: ; wherein, is the discrete change amount.

7. The multifunctional multiplexed turntable of claim 6, wherein, The response surface function model with the bottom support force N1 of the center pivot (110) as the optimization target is: ; wherein, is a fitting constant; is a response coefficient of the i th design variable; is the i th design variable.

8. The multifunctional multiplexed turntable of claim 7, wherein, According to the target constraint condition between the bottom support force N1 of the center pivot (110) and the support force N2 of the connection position of the cabin framework (210) and the roller combination (120), and the stress constraint condition of the whole turntable system, a response surface function model of the support force N2 of the connection position of the cabin framework (210) and the roller combination (120) is obtained; and the response surface function model of the two force bearing distribution targets is used to update the initial geometric model.

9. The multifunctional multiplexed turntable of claim 8, wherein, The target constraint condition is: The stress constraint condition is: Wherein, F2 is the total bearing capacity of the rotary table; is the node of each position of the finite element model, D is the entire model domain; is the maximum stress.

10. The multifunctional multiplexed turntable of claim 1, wherein, The roller combination (120) adopts a four-point layout, and four groups of roller combinations (120) are arranged; each roller combination (120) includes a driving roller (121), a driven roller (122) and a roller driving device (123); the roller driving device (123) is connected with the driving roller (121) to provide power for the driving roller (121), the driven roller (122) moves in the same direction with the driving roller (121); and the driving roller (121) and the driven roller (122) are conical.

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