A process test method for optimizing acoustic performance of a sheet structure

Abstract

The present application provides a kind of sheet structure acoustic performance optimization process test method.In the sheet structure manufacturing process, increase the analysis method of process parameter setting based on acoustic performance improvement, by the analysis method research of the influence of the process parameters such as the deformation size of the weld area in the sheet structure manufacturing process, the panel wall difference before welding, the structure opening size, the welding verticality deviation, etc.on the acoustic performance of sheet structure, by taking the threshold value of sheet structure manufacturing process requirement as reference, by amplifying the deviation of process parameters, setting the process test piece manufacturing process parameters, then by the way of external excitation force, using vibration noise test equipment to test the acoustic performance of sheet structure, obtain the acoustic performance data of sheet structure process test piece made by different process parameters, analysis obtains a kind of sheet structure acoustic performance and manufacturing process parameter correlation conclusion.It is suitable to be used as a kind of sheet structure acoustic performance optimization process test method.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding, and more particularly to thin-plate structures in the shipbuilding process, and especially to a process testing method for optimizing the acoustic performance of thin-plate structures. Background Technology

[0002] Thin-plate structures in shipbuilding refer to hollow structures protruding from the hull. The turbulent boundary layer of the incoming flow cannot overcome the pressure rise at the leading edge of the thin-plate structure to maintain forward motion. The spanwise pressure gradient causes fluid separation, forming a rotating flow at the leading edge that moves downstream, creating a so-called "horseshoe vortex." In the upper and middle parts of the thin-plate structure, the flow is a sheet-like boundary layer. Shear flow occurs in the cavities at the top of the thin-plate structure, forming vortices within the cavities. This leads to vibration and noise on the thin-plate panels, which to some extent affects the ship's service life. Under certain special operating conditions, resonance is more likely to occur, leading to fracture of the thin-plate structure.

[0003] In shipbuilding, under the condition that the plate specifications remain unchanged, optimizing the manufacturing process parameters can improve the transmission impedance of thin plate structures and effectively reduce the vibration efficiency of the plate walls. Therefore, it is necessary to conduct research on a process test method for optimizing the acoustic performance of thin plate structures. Optimizing the manufacturing process to reduce the vibration noise of thin plate structures is of positive significance for protecting the safety of the hull structure and extending its service life. Summary of the Invention

[0004] To fully leverage the continuous optimization of the acoustic performance of thin-plate structures during shipbuilding, and to develop a method for improving the acoustic performance of thin-plate structures based on optimized manufacturing process parameters, thereby meeting the safety and reliability requirements during ship operation, this invention provides a process testing method for optimizing the acoustic performance of thin-plate structures. This method incorporates analytical approaches for setting process parameters based on acoustic performance improvement, thus resolving the challenges of process testing for optimizing the acoustic performance of thin-plate structures.

[0005] The technical solution adopted by this invention to solve the technical problem is:

[0006] A process test specimen for optimizing the acoustic performance of a thin plate structure includes a base, a panel, reinforcing ribs, a cover plate, a welding deformation process parameter setting area, a welding plate wall difference process parameter setting area, a welding panel opening parameter setting area, and a welding verticality process parameter setting area.

[0007] The base is mainly used for placing process test pieces and to simulate the component characteristics of thin-plate structures welded to thick steel plates in real ships.

[0008] The panel is mainly used as a test carrier for the acoustic performance of thin-plate structures under different manufacturing process parameters.

[0009] The reinforcing ribs are mainly used to strengthen the structural strength of the side panels of the components, ensuring that the state of the test model components is consistent with that of the actual ship.

[0010] The cover plate is mainly used to bear the external excitation force for acoustic performance testing of thin plate structures.

[0011] The welding deformation process parameter setting area is mainly used to establish deformation deviation in the welding area of ​​two panels, serving as experimental conditions for analyzing the correlation between the acoustic performance of thin-plate structures and manufacturing process parameters.

[0012] The welding plate wall difference process parameter setting area is mainly used to establish the plate wall butt joint deviation when welding two panels, as an experimental condition for analyzing the correlation between the acoustic performance of thin plate structures and manufacturing process parameters.

[0013] The welding panel opening parameter setting area is mainly used to establish the opening size deviation when the side lower panel is cut, as an experimental condition for analyzing the correlation between the acoustic performance of the thin plate structure and the manufacturing process parameters.

[0014] The welding verticality process parameter setting area is mainly used to establish verticality deviation when the side panel is welded to the base, serving as experimental conditions for analyzing the correlation between the acoustic performance of the thin plate structure and the manufacturing process parameters.

[0015] To further address the technical problem this invention aims to solve, this invention provides a process testing method for optimizing the acoustic performance of thin-plate structures, which is implemented according to the following steps:

[0016] (1) Analyze the process parameters of the target structure manufacturing process to determine the influence of process parameters on the acoustic performance of the thin plate structure, such as the deformation size of the weld area, the difference between the panel and the pre-welding plate wall, the size of the structural opening, and the verticality deviation of the welding.

[0017] (2) Using the threshold of the process requirements for the thin plate structure manufacturing process as a reference, the process parameters for the process test piece are set by amplifying the deviation of the process parameters.

[0018] (3) Fabricate thin plate structure process test pieces according to the set process parameter deviations.

[0019] (4) By applying external excitation force, the acoustic performance of the thin plate structure is tested using vibration and noise testing equipment, and the acoustic performance data of the thin plate structure process test pieces made with different process parameters are obtained.

[0020] (5) Extract frequency domain data from 25 to 800 Hz and plot a graph showing the correlation between process parameter deviation and acoustic performance parameters.

[0021] (6) Based on the data in the charts, analyze the influence of different manufacturing process parameters on the acoustic performance of thin plate structures in the low-frequency band (25-315Hz) and the mid-to-high frequency band (315-800Hz), and obtain a conclusion on the correlation between the acoustic performance of thin plate structures and manufacturing process parameters.

[0022] Positive Effects: This invention adds an analytical method for setting process parameters based on acoustic performance improvement to the traditional thin-plate structure manufacturing process. It enables process parameter analysis of the structure's manufacturing process, determining the impact of process parameters such as weld deformation, pre-weld wall thickness difference, structural opening size, and welding perpendicularity deviation on the acoustic performance of the thin-plate structure. This demonstrates the feasibility of the adopted method, which includes process flow analysis, process parameter setting, process model manufacturing, and process testing verification, on the correlation between structural acoustic performance and manufacturing process parameters. It solves the problem of lacking process testing methods for analyzing the correlation between acoustic performance and manufacturing process parameters of thin-plate structures. Therefore, it is suitable for application as a process testing method for optimizing the acoustic performance of thin-plate structures. Attached Figure Description

[0023] Figure 1 A schematic diagram of a process test piece for a process test method to optimize the acoustic performance of a thin plate structure;

[0024] Figure 2 A schematic diagram of the welding deformation process parameter setting area for a process test piece in a process test method for optimizing the acoustic performance of a thin plate structure;

[0025] Figure 3 A schematic diagram of the process parameter setting area for the welded plate wall difference of a process test specimen in a process test method for optimizing the acoustic performance of a thin plate structure;

[0026] Figure 4 A schematic diagram of the welding panel opening parameter setting area of ​​a process test piece for a process test method to optimize the acoustic performance of a thin plate structure;

[0027] Figure 5 This is a schematic diagram of the process parameter setting area for the welding verticality of the test specimen in a process test method for optimizing the acoustic performance of a thin plate structure.

[0028] In the diagram: 1. Base, 2. Panel, 3. Reinforcing rib, 4. Cover plate, 5. Welding deformation process parameter setting area, 6. Welding plate wall difference process parameter setting area, 7. Welding panel opening parameter setting area, 8. Welding verticality process parameter setting area. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] As shown in the figure, a process test piece for optimizing the acoustic performance of a thin plate structure includes a base 1, a panel 2, a reinforcing rib 3, a cover plate 4, a welding deformation process parameter setting area 5, a welding plate wall difference process parameter setting area 6, a welding panel opening parameter setting area 7, and a welding verticality process parameter setting area 8.

[0031] Base 1 is mainly used for placing process test pieces and to simulate the component characteristics of a thin-plate structure of a real ship welded to a thick steel plate. A 38mm thick steel plate is selected.

[0032] Panel 2 is mainly used as a test carrier for the acoustic performance of thin plate structures under different manufacturing process parameters, and a 10mm thick steel plate is selected.

[0033] The reinforcing rib 3 is mainly used to strengthen the structural strength of the side panel of the component, ensuring that the state of the test model component is consistent with that of the actual ship.

[0034] The cover plate 4 is mainly used to bear the external excitation force for acoustic performance testing of thin plate structures.

[0035] The welding deformation process parameter setting area 5 is mainly used to establish deformation deviations of 2mm, 4mm, 6mm, and 8mm in the welding area of ​​two panels, as experimental conditions for analyzing the correlation between the acoustic performance of thin plate structures and manufacturing process parameters.

[0036] Area 6 for setting process parameters for welding plate wall difference is mainly used to establish plate wall butt deviations of 0.5mm, 2mm, 4mm, and 6mm when welding two panels, as experimental conditions for analyzing the correlation between the acoustic performance of thin plate structures and manufacturing process parameters.

[0037] The welding panel opening parameter setting area 7 is mainly used to establish opening size deviations of 0*0mm, 100*100mm, 105mm*105mm, and 110*110mm when cutting the side bottom panel, as experimental conditions for analyzing the correlation between the acoustic performance of the thin plate structure and the manufacturing process parameters.

[0038] The welding verticality process parameter setting area 8 is mainly used to establish verticality deviations of 0.5mm, 1mm, 2mm, and 3mm when the side panel is welded to the base, as experimental conditions for analyzing the correlation between the acoustic performance of the thin plate structure and the manufacturing process parameters.

[0039] By analyzing the process parameters of the target structure's manufacturing process, it was determined that process parameters such as the deformation magnitude of the weld area, the difference in panel wall size before welding, the size of structural openings, and the deviation of welding perpendicularity have a certain impact on the acoustic performance of thin-plate structures. Then, using the threshold of the manufacturing process requirements for thin-plate structures as a reference, the manufacturing process parameters of the test model components were set by amplifying the deviation of process parameters. Subsequently, the acoustic performance of the thin-plate structure was tested using vibration and noise testing equipment by applying external excitation force. The acoustic performance data of the test model components of the thin-plate structure manufactured with different process parameters were obtained, and the correlation between the acoustic performance of the thin-plate structure and the manufacturing process parameters was analyzed to obtain a conclusion.

[0040] Four process parameter deviations are set for each process parameter setting area to further expand the scope of experimental data analysis and enhance the accuracy of correlation.

[0041] A process test method for optimizing the acoustic performance of thin-plate structures, comprising the following steps:

[0042] (1) Analyze the process parameters of the target structure manufacturing process to determine the influence of process parameters such as the deformation size of the weld area, the difference between the panel and the pre-welding plate wall, the size of the structural opening, and the deviation of the welding verticality on the acoustic performance of the thin plate structure.

[0043] (2) Taking the threshold of the process requirements for the manufacturing process of thin plate structure as a reference, the process parameters for the production of process test pieces are set by amplifying the deviation of process parameters. For example, the requirement for the wall difference between the panel and the welded plate of the thin plate structure is not greater than 1 mm, and the wall difference between the panel and the welded plate of the test model component is set to 0.5 mm, 2 mm, 4 mm, and 6 mm.

[0044] (3) Fabricate thin plate structure process test pieces according to the set process parameter deviations.

[0045] (4) By applying external excitation force, the acoustic performance of the thin plate structure is tested using vibration and noise testing equipment, and the acoustic performance data of the thin plate structure process test pieces made with different process parameters are obtained.

[0046] (5) Extract frequency domain data from 25 to 800 Hz and plot a graph showing the correlation between process parameter deviation and acoustic performance parameters.

[0047] (6) Based on the data in the charts, analyze the influence of different manufacturing process parameters on the acoustic performance of thin plate structures in the low-frequency band (25-315Hz) and the mid-to-high frequency band (315-800Hz), and obtain a conclusion on the correlation between the acoustic performance of thin plate structures and manufacturing process parameters.

[0048] Features of this invention:

[0049] By analyzing the process parameters of the fabrication process of thin-plate structures, the influence of process parameters such as the deformation of the weld area, the difference between the panel wall and the pre-weld wall thickness, the size of the structural openings, and the verticality deviation of the welding on the acoustic performance of the thin-plate structures was determined. This proved that the adopted method of correlation analysis between the acoustic performance of the structure and the manufacturing process parameters, including process flow analysis, process parameter setting, process model manufacturing, and process test verification, is feasible and solves the problem of lacking process test methods for correlation analysis between the acoustic performance of thin-plate structures and manufacturing process parameters.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A process test method for optimizing the acoustic performance of a thin plate structure, characterized by: using a process test piece for optimizing the acoustic performance of a thin plate structure, comprising a base (1), a panel (2), a stiffener (3), a cover plate (4), a welding deformation process parameter setting area (5), a welding plate wall difference process parameter setting area (6), a welding panel opening parameter setting area (7), and a welding verticality process parameter setting area (8); the base (1) is used for placing the process test piece, and simulates the component features of the thin plate structure welded on the thick steel plate of the actual ship; the panel (2) is used as a test carrier for the acoustic performance state of the thin plate structure under different manufacturing process parameters; the stiffener (3) is used to strengthen the side panel structure of the component to ensure that the test model component state is consistent with the actual ship; the cover plate (4) is used to bear the external excitation force for testing the acoustic performance of the thin plate structure; the welding deformation process parameter setting area (5) is used to establish a deformation deviation in the welding area of the two panels, as a test condition for analyzing the correlation between the acoustic performance of the thin plate structure and the manufacturing process parameters; the welding plate wall difference process parameter setting area (6) is used to establish a plate wall butt joint deviation when the two panels are welded, as a test condition for analyzing the correlation between the acoustic performance of the thin plate structure and the manufacturing process parameters; the welding panel opening parameter setting area (7) is used to establish an opening size deviation when the side lower panel is cut, as a test condition for analyzing the correlation between the acoustic performance of the thin plate structure and the manufacturing process parameters; the welding verticality process parameter setting area (8) is used to establish a verticality deviation when the side panel is welded to the base, as a test condition for analyzing the correlation between the acoustic performance of the thin plate structure and the manufacturing process parameters; comprising the following steps: 1) analyzing the process parameters of the manufacturing process of the target structure, determining the welding area deformation size, the panel wall difference before welding, the structure opening size, and the welding verticality deviation process parameter affecting the acoustic performance of the thin plate structure; 2) setting the manufacturing process parameters of the process test piece by amplifying the process parameter deviation based on the threshold value of the manufacturing process requirements of the thin plate structure; 3) manufacturing the thin plate structure process test piece according to the set process parameter deviation; 4) testing the acoustic performance of the thin plate structure by using vibration noise testing equipment through external excitation, and obtaining the acoustic performance data of the thin plate structure process test piece manufactured by different process parameters; 5) intercepting the frequency domain data of 25-800Hz, and drawing a correlation chart of process parameter deviation and acoustic performance parameter; 6) analyzing the influence of different manufacturing process parameters on the acoustic performance of the thin plate structure in the low frequency band of 25-315Hz and the medium-high frequency band of 315-800Hz according to the chart data, and obtaining a correlation conclusion between the acoustic performance of the thin plate structure and the manufacturing process parameters.

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