An adjustable attached water simulation device for a land-based test platform

Abstract

This invention discloses an adjustable attached water simulation device for a land-based test platform, relating to the field of vibration reduction and noise reduction technology in shipbuilding and marine engineering. It includes a base and a test plate frame structure, with multiple attached water simulation devices and multiple load-bearing springs positioned between the base and the test plate frame structure. Each attached water simulation device includes a connecting module and an adjustable inertial container. The adjustable inertial container includes a lower plate, an upper plate, a rack, a gear, a continuously variable transmission (CVT), and an energy storage flywheel. Two parallel plates are vertically fixed to the lower plate. The rack is slidably connected vertically within a channel between the two parallel plates, with its upper end vertically fixed to the upper plate. Limiting springs are installed on the upper ends of the two parallel plates. The gear meshes with the rack and is fixed to the drive shaft of the CVT's driving wheel. The energy storage flywheel is fixed to the driven shaft of the CVT's driven wheel. This invention enables vibration testing in a simulated aquatic environment on land.

Description

Technical Field

[0001] This invention relates to the field of vibration and noise reduction technology in shipbuilding and marine engineering, and in particular to an adjustable attached water simulation device for a land-based test platform. Background Technology

[0002] With the International Maritime Organization and various countries continuously raising their standards for vibration and noise in ships and marine engineering, vibration reduction and noise reduction technology has become an important research topic in the field of shipbuilding and marine engineering. For ships, reducing the vibration and noise of the hull structure can not only provide a comfortable and healthy living and working environment for the crew, but also reduce noise pollution to the external environment during navigation, thus practicing the concept of protecting the Earth's environment and maintaining sustainable human development.

[0003] To verify the feasibility of solutions to ship vibration and wave problems, corresponding structural tests are required. Conducting tests in a land-based laboratory to simulate the aquatic environment improves the convenience and safety of the experiments. However, when a ship is in motion, the water surrounding the hull is also in motion, and this water significantly affects hull vibration; therefore, it must be considered when studying hull structural vibration. To solve vibration analysis and control problems and explore the vibration noise transmission mechanism, experiments are necessary. However, wet-state tests (water tanks, at sea, etc.) are difficult and costly to implement. Therefore, to simulate the wet environment and reflect the influence of attached water on structural vibration during land-based experiments, this application proposes an adjustable attached water simulation device for a land-based test platform. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable attached water simulation device for a land-based test platform to solve the problems existing in the prior art and achieve the goal of conducting vibration tests in a simulated aquatic environment on land.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] The present invention provides an adjustable attached water simulation device for a land test platform, including a base and a test plate frame structure disposed above the base. Multiple attached water simulation devices and multiple bearing springs are provided between the base and the test plate frame structure. The upper and lower ends of the attached water simulation devices and the upper and lower ends of the bearing springs are respectively fixedly installed on the test plate frame structure and the base.

[0007] The attached water simulation device includes a connection module and an adjustable inertial container. The upper end of the connection module is fixedly installed on the test plate frame structure, and the adjustable inertial container is fixed to the lower end of the connection module. The lower end of the adjustable inertial container is fixed on the base.

[0008] The adjustable inertial container includes a lower plate, an upper plate, a rack, a gear, a continuously variable transmission (CVT), and an energy storage flywheel. Two parallel plates are vertically fixed to the lower plate. The rack is slidably connected vertically within a channel between the two parallel plates, with its upper end extending out of the channel and vertically fixed to the lower surface of the upper plate. Limiting springs are installed at the upper ends of the two parallel plates, located between the parallel plates and the upper plate. The gear meshes with the rack and is fixed to the drive shaft of the CVT, which is rotatably connected to the two parallel plates. The energy storage flywheel is fixed to the driven shaft of the CVT, which is rotatably connected to the two parallel plates. The lower plate is fixed to the base, and the upper plate is fixed to the lower end of the connecting module.

[0009] Preferably, the base includes a panel, a web, an inclined plate, and a bottom plate. The web is disposed between the panel and the bottom plate. The web is an isosceles trapezoidal structure. The upper end of the web is fixedly connected to the panel, and the lower end is fixedly connected to the bottom plate. The inclined plate is fixedly connected to the inclined side of the web. Each of the attached water simulation devices is equally spaced at the bottom of the test plate frame structure. Each of the four corners of the bottom of the test plate frame structure is provided with a bearing spring, and four bearing springs are provided near the center of the bottom of the test plate frame structure.

[0010] Preferably, the continuously variable transmission (CVT) has a control handle on one side for adjusting the transmission ratio of the CVT.

[0011] Preferably, the rack is supported in the channel by a sliding support rod, which is fixedly mounted on the two parallel plates.

[0012] Preferably, both the drive shaft of the driving wheel and the driven shaft of the driven wheel are rotatably connected to the two parallel plates via bearings.

[0013] Preferably, the energy storage flywheel is disposed on the outside of the two parallel plates.

[0014] Preferably, the connecting module is a solid truncated quadrangular prism, the large end of which is fixed to the bottom of the test plate frame structure by bolts, and the small end is fixedly connected to the upper plate by bolts.

[0015] Preferably, the connecting module is made of steel.

[0016] The present invention achieves the following technical effects compared to the prior art:

[0017] This invention provides an adjustable attached water simulation device for a land-based test platform. During vibration tests of a plate frame structure, external excitations such as vibrators cause vibrations in the test plate frame structure. The vibrations are transmitted through the structure within the plate frame to the base plate of the test plate frame structure. The base plate of the plate frame structure drives the connecting module of the attached water simulation device to move. The connecting module drives the plate above the adjustable inertial container to move together. The adjustable inertial container, as an output mechanism of inertial force, can act on the structure in the form of added mass. The plate above the adjustable inertial container drives a rack to perform reciprocating vertical motion relative to the inertial container structure. The reciprocating motion is transmitted to a continuously variable transmission (CVT) through gears meshing with the rack, and then to an energy storage flywheel, becoming the rotational motion of the energy storage flywheel. This achieves the encapsulation of the inertia of the energy storage flywheel, realizing the simulation of the impact of attached water on ships and marine structures on land, thereby enabling wet testing to be completed on land. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the adjustable attached water simulation device for the land-based test platform provided by the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the attached water simulation device in this invention;

[0021] Figure 3 This is a front cross-sectional view of the adjustable inertial container in this invention;

[0022] Figure 4 This is a side cross-sectional view of the adjustable inertial container in this invention.

[0023] In the diagram: 1-Base, 2-Test plate frame structure, 3-Attached water simulation device, 4-Bearing spring, 5-Connecting module, 6-Adjustable inertial container, 7-Lower plate, 8-Upper plate, 9-Rack, 10-Gear, 11-Continuously variable transmission, 12-Energy storage flywheel, 13-Parallel plate, 14-Channel, 15-Limiting spring, 16-Driven wheel drive shaft, 17-Driven wheel driven shaft, 18-Panel, 19-Web plate, 20-Inclined plate, 21-Base plate, 22-Operating handle, 23-Sliding support rod, 24-Bearing. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The purpose of this invention is to provide an adjustable attached water simulation device for a land-based test platform to solve the problems existing in the prior art and achieve the goal of conducting vibration tests in a simulated aquatic environment on land.

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1-4 As shown, this embodiment provides an adjustable attached water simulation device for a land test platform, including a base 1 and a test plate frame structure 2 disposed above the base 1. Multiple attached water simulation devices 3 and multiple bearing springs 4 are provided between the base 1 and the test plate frame structure 2. The upper and lower ends of the attached water simulation devices 3 and the upper and lower ends of the bearing springs 4 are respectively fixedly installed on the test plate frame structure 2 and the base 1.

[0028] The attached water simulation device 3 includes a connection module 5 and an adjustable inertial container 6. The upper end of the connection module 5 is fixedly installed on the test plate frame structure 2, and the adjustable inertial container 6 is fixed to the lower end of the connection module 5. The lower end of the adjustable inertial container 6 is fixed on the base 1.

[0029] The adjustable inertial container 6 includes a lower plate 7, an upper plate 8, a rack 9, a gear 10, a continuously variable transmission (CVT) 11, and an energy storage flywheel 12. Two parallel plates 13 are vertically fixedly connected to the lower plate 7. The rack 9 is vertically slidably connected in a channel 14 between the two parallel plates 13. The upper end of the rack 9 extends out of the channel 14 and is vertically fixed to the lower end face of the upper plate 8. Limiting springs 15 are installed on the upper ends of the two parallel plates 13. The limiting springs 15 are located between the parallel plates 13 and the upper plate 8 to limit the range of motion of the rack 9 and protect the upper plate 8. The gear 10 meshes with the rack 9 and is fixed to the drive shaft 16 of the CVT 11. The drive shaft 16 is rotatably connected to the two parallel plates 13. The energy storage flywheel 12 is fixed to the driven shaft 17 of the CVT 11. The driven shaft 17 is rotatably connected to the two parallel plates 13. The lower plate 7 is fixed to the base 1, and the upper plate 8 is fixed to the lower end of the connecting module 5.

[0030] During the vibration test of the plate frame structure, external excitation such as the vibrator causes the test plate frame structure 2 to vibrate. The vibration is transmitted through the structure in the plate frame to the bottom plate of the test plate frame structure 2. The bottom plate of the plate frame structure drives the connecting module 5 of the attached water simulation device 3 to move. The connecting module 5 drives the upper plate 8 of the adjustable inertia container 6 to move together. The adjustable inertia container 6, as the output mechanism of inertial force, can act on the structure in the form of additional mass. The upper plate 8 of the adjustable inertia container 6 drives the rack 9 to perform reciprocating vertical motion relative to the inertia container structure. The reciprocating motion is transmitted to the continuously variable transmission 11 through the gear 10 meshing with the rack 9, and then to the energy storage flywheel 12, which becomes the rotational motion of the energy storage flywheel 12, realizing the encapsulation of the inertia of the energy storage flywheel 12, realizing the simulation of the impact of attached water on ships and marine structures on land, so that wet tests can be completed on land. The linear velocity of the upper plate 8 of the adjustable inertia container 6 and the rotational speed between it and the energy storage flywheel 12 can be achieved by changing the transmission ratio of the continuously variable transmission (CVT) 11. The transmission ratio is adjusted by regulating the working radius of the conical wheel during operation of the CVT 11. Changing the transmission ratio allows for stepless adjustment of the working radius of the flywheel energy storage device within the inertia container, thus achieving adjustability of the inertia coefficient. The CVT 11 ensures that the inertia coefficient of the inertia container changes smoothly within a given range.

[0031] In this embodiment, the base 1 includes a panel 18, a web 19, an inclined plate 20, and a bottom plate 21. The web 19 is disposed between the panel 18 and the bottom plate 21. The web 19 is an isosceles trapezoidal structure. The upper end of the web 19 is fixedly connected to the panel 18, and the lower end is fixedly connected to the bottom plate 21. The inclined plate 20 is fixedly connected to the inclined side of the web 19 to reinforce the structure. Attached water simulation devices 3 are evenly spaced at the bottom of the test plate frame structure 2. A load-bearing spring 4 is provided at each of the four corners of the bottom of the test plate frame structure 2, and four load-bearing springs 4 are located near the center of the bottom of the test plate frame structure 2. In this embodiment, 35 attached water simulation devices 3 are provided. The inclined plate 20 forms a 45° angle with the bottom plate 21. To facilitate equipment installation and reduce the weight of the base 1, the panel 18 is designed with a rectangular opening.

[0032] In this embodiment, a control handle 22 is provided on one side of the continuously variable transmission (CVT) 11 for adjusting the gear ratio of the CVT 11. The gear ratio of the CVT 11 can be manually adjusted via the control handle 22, making adjustment convenient and quick.

[0033] In this embodiment, the rack 9 is supported in the channel 14 by the sliding support rod 23. The sliding support rod 23 is fixedly installed on two parallel plates 13. The rack 9 is limited by the sliding support rod 23, so that the rack 9 can slide stably along the vertical direction.

[0034] In this embodiment, the drive shaft 16 of the driving wheel and the driven shaft 17 of the driven wheel are rotatably connected to the two parallel plates 13 through the bearing 24, making the rotation more stable and smooth.

[0035] In this embodiment, the energy storage flywheel 12 is disposed on the outside of the two parallel plates 13.

[0036] In this embodiment, the connecting module 5 is a solid truncated pyramid, preferably made of solid steel. The large end of the truncated pyramid is fixed to the bottom of the test plate frame structure 2 by bolts, and the small end is fixedly connected to the upper plate 8 by bolts.

[0037] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An adjustable attached water simulation device for a land-based experimental platform, characterized in that: The device includes a base and a test plate frame structure disposed above the base. Multiple attached water simulation devices and multiple load-bearing springs are provided between the base and the test plate frame structure. The upper and lower ends of the attached water simulation devices and the upper and lower ends of the load-bearing springs are respectively fixedly installed on the test plate frame structure and the base. The attached water simulation device includes a connection module and an adjustable inertial container. The upper end of the connection module is fixedly installed on the test plate frame structure, and the adjustable inertial container is fixed to the lower end of the connection module. The lower end of the adjustable inertial container is fixed on the base. The adjustable inertial container includes a lower plate, an upper plate, a rack, a gear, a continuously variable transmission (CVT), and an energy storage flywheel. Two parallel plates are vertically fixed to the lower plate. The rack is slidably connected vertically within a channel between the two parallel plates, with its upper end extending out of the channel and vertically fixed to the lower surface of the upper plate. Limiting springs are installed at the upper ends of the two parallel plates, located between the parallel plates and the upper plate. The gear meshes with the rack and is fixed to the drive shaft of the CVT, which is rotatably connected to the two parallel plates. The energy storage flywheel is fixed to the driven shaft of the CVT, which is rotatably connected to the two parallel plates. The lower plate is fixed to the base, and the upper plate is fixed to the lower end of the connecting module.

2. The adjustable attached water simulation device for a land-based test platform according to claim 1, characterized in that: The base includes a panel, a web, an inclined plate, and a bottom plate. The web is disposed between the panel and the bottom plate and is an isosceles trapezoidal structure. The upper end of the web is fixedly connected to the panel, and the lower end is fixedly connected to the bottom plate. The inclined plate is fixedly connected to the inclined side of the web. Each of the attached water simulation devices is equally spaced at the bottom of the test plate frame structure. Each of the four corners of the bottom of the test plate frame structure is provided with a bearing spring, and four bearing springs are provided near the center of the bottom of the test plate frame structure.

3. The adjustable attached water simulation device for a land-based test platform according to claim 1, characterized in that: The continuously variable transmission (CVT) has a control handle on one side for adjusting the transmission ratio.

4. The adjustable attached water simulation device for a land-based test platform according to claim 1, characterized in that: The rack is supported in the channel by a sliding support rod, which is fixedly installed on the two parallel plates.

5. The adjustable attached water simulation device for a land-based test platform according to claim 1, characterized in that: Both the drive shaft of the driving wheel and the driven shaft of the driven wheel are rotatably connected to the two parallel plates via bearings.

6. The adjustable attached water simulation device for a land-based test platform according to claim 1, characterized in that: The energy storage flywheel is located on the outside of the two parallel plates.

7. The adjustable attached water simulation device for a land-based test platform according to claim 1, characterized in that: The connecting module is a solid truncated quadrangular prism. The large end of the truncated quadrangular prism is fixed to the bottom of the test plate frame structure by bolts, and the small end is fixedly connected to the upper plate by bolts.

8. The adjustable attached water simulation device for a land-based test platform according to claim 7, characterized in that: The connecting module is made of steel.

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