Method and device for determining surface vibration index of engine components

Abstract

The present invention discloses a method and device for determining the surface vibration index of engine components, which relates to the technical field of engines. According to the target value of the sound pressure level of the overall engine radiation noise, the present invention determines the target value of the surface vibration velocity level of the engine components, realizes the definition of the surface vibration index of the engine components, and can test whether the structural design of the components meets the surface vibration index of the components after the component design is completed. If the test result does not meet the standard, re-design can be carried out in the component design stage, which is beneficial to reducing the engine development cycle and cost.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and particularly to a method and device for determining the surface vibration index of engine components. Background Art

[0002] In the initial stage of engine development, the target value of the overall engine radiation noise sound pressure level is generally defined. When designing each component of the engine in the design stage, without the surface vibration index of the components, it is impossible to determine whether the structural design of the components meets the noise requirements. Only after the overall engine development is completed, the overall engine radiation noise is tested in the test verification stage. If the test result does not meet the standard, the design of each component will be redone, resulting in a significant increase in the development cycle and cost.

[0003] It can be understood that if the surface vibration index of the components can be defined, then it can be determined whether the structural design of the components meets the surface vibration index of the components after the component design is completed. If the test result does not meet the standard, then the design can be redone in the component design stage, thereby reducing the development cycle and cost. Therefore, how to define the surface vibration index of engine components is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] The present invention provides a method and device for determining the surface vibration index of engine components, and solves the technical problem of how to define the surface vibration index of engine components.

[0005] On the one hand, the embodiments of the present invention provide the following technical solutions:

[0006] A method for determining the surface vibration index of engine components, comprising:

[0007] Obtaining the target value of the overall engine radiation noise sound pressure level;

[0008] Determining the target value of the surface vibration velocity level of the engine components according to the sound pressure level target value.

[0009] Preferably, the determining the target value of the surface vibration velocity level of the engine components according to the sound pressure level target value includes:

[0010] Determining the target value of the sound power level according to the sound pressure level target value;

[0011] Determining the target value of the surface vibration velocity level of the engine according to the sound power level target value;

[0012] Determining the target value of the vibration velocity level at the standard frequency according to the target value of the surface vibration velocity level of the engine;

[0013] Determining the target value of the surface vibration velocity level of the components according to the center frequency of the octave band and the target value of the vibration velocity level at the standard frequency.

[0014] Preferably, determining the target sound power level according to the target sound pressure level includes:

[0015] Obtaining the atmospheric pressure and ambient temperature corresponding to the target sound pressure level;

[0016] Determining the temperature and air pressure correction coefficient according to the atmospheric pressure and the ambient temperature;

[0017] Determining the target sound power level according to the target sound pressure level and the temperature and air pressure correction coefficient.

[0018] Preferably, determining the temperature and air pressure correction coefficient according to the atmospheric pressure and the ambient temperature includes:

[0019]

[0020] C1 is the temperature and air pressure correction coefficient, B is the atmospheric pressure, B0 is the reference standard atmospheric pressure, and T is the ambient temperature.

[0021] Preferably, determining the target sound power level according to the target sound pressure level and the temperature and air pressure correction coefficient includes:

[0022] L W =L P +10·log 10 4πr 2 +C1;

[0023] L W is the target sound power level, L P is the target sound pressure level, r is the test radius corresponding to the target sound pressure level, and C1 is the temperature and air pressure correction coefficient.

[0024] Preferably, determining the target engine surface vibration velocity level according to the target sound power level includes:

[0025]

[0026] is the target engine surface vibration velocity level, A0 is the standardized reference area, v0 is the reference velocity level, L W is the target sound power level, A j is the engine surface area.

[0027] Preferably, determining the target standard frequency vibration velocity level according to the target engine surface vibration velocity level includes:

[0028]

[0029] v j is the target value of the standard frequency vibration velocity level, is the target value of the engine surface vibration velocity level, and C2 is the octave correction coefficient.

[0030] On the other hand, the embodiments of the present invention also provide the following technical solutions:

[0031] An engine component surface vibration index determination device, comprising:

[0032] A sound pressure level target value acquisition module, configured to acquire the target value of the engine's overall radiation noise sound pressure level;

[0033] A component surface vibration index determination module, configured to determine the target value of the component surface vibration velocity level of the engine according to the sound pressure level target value.

[0034] Preferably, the component surface vibration index determination module is further configured to:

[0035] Determine the target value of the sound power level according to the sound pressure level target value;

[0036] Determine the target value of the engine surface vibration velocity level according to the sound power level target value;

[0037] Determine the target value of the standard frequency vibration velocity level according to the target value of the engine surface vibration velocity level;

[0038] Determine the target value of the component surface vibration velocity level according to the center frequency of the octave and the target value of the standard frequency vibration velocity level.

[0039] Preferably, the component surface vibration index determination module is further configured to:

[0040] Obtain the atmospheric pressure and ambient temperature corresponding to the sound pressure level target value;

[0041] Determine the temperature and pressure correction coefficient according to the atmospheric pressure and the ambient temperature;

[0042] Determine the target value of the sound power level according to the sound pressure level target value and the temperature and pressure correction coefficient.

[0043] Preferably, when the component surface vibration index determination module determines the temperature and pressure correction coefficient according to the atmospheric pressure and the ambient temperature, it includes:

[0044]

[0045] C1 is the temperature and pressure correction coefficient, B is the atmospheric pressure, B0 is the reference standard atmospheric pressure, and T is the ambient temperature.

[0046] Preferably, the component surface vibration index determination module determines the target sound power level according to the target sound pressure level value and the temperature and air pressure correction coefficient, including:

[0047] L W = L P + 10·log 10 4πr 2 + C1;

[0048] L W is the target sound power level, L P is the target sound pressure level value, r is the test radius corresponding to the target sound pressure level value, and C1 is the temperature and air pressure correction coefficient.

[0049] Preferably, the component surface vibration index determination module determines the target engine surface vibration velocity level according to the target sound power level, including:

[0050]

[0051] is the target engine surface vibration velocity level, A0 is the standardized reference area, v0 is the reference velocity level, L W is the target sound power level, A j is the engine surface area.

[0052] Preferably, the component surface vibration index determination module determines the target standard frequency vibration velocity level according to the target engine surface vibration velocity level, including:

[0053]

[0054] v j is the target standard frequency vibration velocity level, is the target engine surface vibration velocity level, and C2 is the octave correction coefficient.

[0055] On the other hand, the embodiments of the present invention also provide the following technical solution:

[0056] An electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein when the processor executes the program, it implements any one of the above engine component surface vibration index determination methods.

[0057] On the other hand, the embodiments of the present invention also provide the following technical solution:

[0058] A computer-readable storage medium has a computer program stored thereon, and when the computer program is executed by a processor, it implements any one of the engine component surface vibration index determination methods described above.

[0059] The technical solution provided by the present invention has at least the following technical effects or advantages:

[0060] The present invention determines the target value of the surface vibration velocity level of the engine components based on the target value of the radiated noise sound pressure level of the whole engine, realizes the definition of the surface vibration index of the engine components, and can test whether the structural design of the components meets the surface vibration index of the components after the component design is completed. If the test result does not meet the standard, the design can be redesigned at the component design stage, which is beneficial to reducing the engine development cycle and cost. Description of the Drawings

[0061] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0062] Figure 1 It is a flowchart of the method for determining the surface vibration index of engine components in an embodiment of the present invention;

[0063] Figure 2 It is a schematic structural diagram of the device for determining the surface vibration index of engine components in an embodiment of the present invention. Detailed Embodiments

[0064] The embodiments of the present invention provide a method and device for determining the surface vibration index of engine components, and solve the technical problem of how to define the surface vibration index of engine components.

[0065] In order to better understand the technical solutions of the present invention, the following will detail the technical solutions of the present invention in combination with the accompanying drawings of the specification and specific embodiments.

[0066] As Figure 1 shown, the method for determining the surface vibration index of engine components in this embodiment includes:

[0067] Step S1, obtaining the target value of the radiated noise sound pressure level of the whole engine;

[0068] Step S2, determining the target value of the surface vibration velocity level of the engine components according to the target value of the sound pressure level.

[0069] In step S1, the sound pressure level is obtained by taking the common logarithm of the ratio of the sound pressure to the reference sound pressure and then multiplying by 20, and its unit is dB. In step S2, the target value of the surface vibration velocity level of the component is the surface vibration index of the engine component.

[0070] The method for determining the surface vibration index of the engine component in this embodiment determines the target value of the surface vibration velocity level of the engine component according to the target value of the overall engine radiated noise sound pressure level, realizes the definition of the surface vibration index of the engine component, and can test whether the structural design of the component meets the surface vibration index of the component after the component design is completed. If the test result does not meet the standard, it can be redesigned in the component design stage, which is beneficial to reducing the engine development cycle and cost.

[0071] In this embodiment, step S2 specifically includes:

[0072] Determine the target value of the sound power level according to the target value of the sound pressure level;

[0073] Determine the target value of the engine surface vibration velocity level according to the target value of the sound power level;

[0074] Determine the target value of the standard frequency vibration velocity level according to the target value of the engine surface vibration velocity level;

[0075] Determine the target value of the component surface vibration velocity level according to the center frequency of the octave band and the target value of the standard frequency vibration velocity level.

[0076] Among them, the sound power level is obtained by taking the common logarithm of the ratio of the sound power to the reference sound power and then multiplying by 10, and its unit is dB.

[0077] In this embodiment, under the same overall engine radiated noise requirement, the defined target values of the sound pressure level are different at different test radii, atmospheric pressures, and ambient temperatures. When determining the target value of the sound pressure level, it will be stipulated what ambient temperature and atmospheric pressure the target value of the sound pressure level corresponds to. If the target value of the sound pressure level corresponds to the reference standard ambient temperature and reference standard atmospheric pressure, there is no need to consider the influence of the ambient temperature and atmospheric pressure on determining the target value of the sound power level, and the target value of the sound power level can be directly determined according to the target value of the sound pressure level. The formula is: L W =L P +10·log 10 4πr 2 ,L W is the target value of the sound power level, L Pis the sound pressure level target value, and r is the test radius corresponding to the sound pressure level target value. The obtained sound power level target value is accurate. However, if the sound pressure level target value does not correspond to the reference standard ambient temperature and reference standard atmospheric pressure, the influence of the ambient temperature and atmospheric pressure corresponding to the sound pressure level target value on determining the sound power level target value needs to be considered, otherwise the obtained sound power level target value is inaccurate. Therefore, in step S2 of this embodiment, determining the sound power level target value according to the sound pressure level target value specifically includes:

[0078] Obtain the atmospheric pressure and ambient temperature corresponding to the sound pressure level target value;

[0079] Determine the temperature and pressure correction coefficient according to the atmospheric pressure and ambient temperature corresponding to the sound pressure level target value;

[0080] Determine the sound power level target value according to the sound pressure level target value and the temperature and pressure correction coefficient.

[0081] Among them, determining the temperature and pressure correction coefficient according to the atmospheric pressure and ambient temperature corresponding to the sound pressure level target value includes:

[0082]

[0083] C1 is the temperature and pressure correction coefficient; B is the atmospheric pressure corresponding to the sound pressure level target value, with the unit of Pa; B0 is the reference standard atmospheric pressure, with the value of 101325 Pa; T is the ambient temperature corresponding to the sound pressure level target value, with the unit of °C.

[0084] Among them, determining the sound power level target value according to the sound pressure level target value and the temperature and pressure correction coefficient includes:

[0085] L W = L P + 10·log 10 4πr 2 + C1;

[0086] L W is the sound power level target value, with the unit of dB; L P is the sound pressure level target value, with the unit of dB; r is the test radius corresponding to the sound pressure level target value, that is, the distance from the defined microphone position to the test center, with the unit of m.

[0087] In step S2, determining the engine surface vibration velocity level target value according to the sound power level target value includes:

[0088]

[0089] is the engine surface vibration velocity level target value, with the unit of dB; A0 is the standardized reference area, with the value of 1 m 2; v0 is the reference speed level, with a value of 10 -5 ; A j is the engine surface area, with the unit of m 2 .

[0090] In step S2, determining the target value of the vibration speed level at the standard frequency according to the target value of the vibration speed level on the engine surface includes:

[0091]

[0092] v j is the target value of the vibration speed level at the standard frequency, with the unit of dB; C2 is the octave correction coefficient, C2 corresponding to the 1 / 3 octave is 6 dB, and C2 corresponding to the octave is 11 dB.

[0093] In step S2, an example of determining the target value of the vibration speed level on the component surface according to the center frequency of the octave and the target value of the vibration speed level at the standard frequency is shown in Table 1.

[0094] Table 1

[0095]

[0096]

[0097] The standard frequency in Table 1 is 1000. It can be seen that when the center frequency of the octave is above 1000, the target value of the vibration speed level on the component surface is the target value of the vibration speed level at the standard frequency.

[0098] As Figure 2 shown, this embodiment also provides a device for determining the vibration index on the surface of engine components, including:

[0099] A sound pressure level target value acquisition module, configured to acquire the target value of the radiated noise sound pressure level of the whole engine;

[0100] A component surface vibration index determination module, configured to determine the target value of the vibration speed level on the surface of the engine components according to the sound pressure level target value.

[0101] The device for determining the vibration index on the surface of engine components in this embodiment determines the target value of the vibration speed level on the surface of the engine components according to the target value of the radiated noise sound pressure level of the whole engine, realizing the definition of the vibration index on the surface of engine components. It can test whether the structural design of the components meets the vibration index on the surface of the components after the component design is completed. If the test result does not meet the standard, the design can be redesigned in the component design stage, which is beneficial to reducing the engine development cycle and cost.

[0102] Furthermore, the component surface vibration index determination module is further configured to:

[0103] Determine the target sound power level according to the target sound pressure level value;

[0104] Determine the target engine surface vibration velocity level according to the target sound power level value;

[0105] Determine the target vibration velocity level at the standard frequency according to the target engine surface vibration velocity level;

[0106] Determine the target vibration velocity level on the surface of the component according to the center frequency of the octave band and the target vibration velocity level at the standard frequency.

[0107] Furthermore, the component surface vibration index determination module is further configured to:

[0108] Obtain the atmospheric pressure and ambient temperature corresponding to the target sound pressure level value;

[0109] Determine the temperature and air pressure correction coefficient according to the atmospheric pressure and ambient temperature corresponding to the target sound pressure level value;

[0110] Determine the target sound power level according to the target sound pressure level value and the temperature and air pressure correction coefficient.

[0111] Furthermore, the component surface vibration index determination module determines the temperature and air pressure correction coefficient according to the atmospheric pressure and ambient temperature corresponding to the target sound pressure level value, including:

[0112]

[0113] C1 is the temperature and air pressure correction coefficient, B is the atmospheric pressure corresponding to the target sound pressure level value, B0 is the reference standard atmospheric pressure, and T is the ambient temperature corresponding to the target sound pressure level value.

[0114] Furthermore, the component surface vibration index determination module determines the target sound power level according to the target sound pressure level value and the temperature and air pressure correction coefficient, including:

[0115] L W = L P + 10·log 10 4πr 2 + C1;

[0116] L W is the target sound power level, L P is the target sound pressure level value, and r is the test radius corresponding to the target sound pressure level value.

[0117] Furthermore, the component surface vibration index determination module determines the target engine surface vibration velocity level according to the target sound power level value, including:

[0118]

[0119] is the target value of the engine surface vibration velocity level, A0 is the standardized reference area, v0 is the reference velocity level, and A j is the engine surface area.

[0120] Further, the component surface vibration index determination module determines the target value of the standard frequency vibration velocity level according to the target value of the engine surface vibration velocity level, including:

[0121]

[0122] v j is the target value of the standard frequency vibration velocity level, and C2 is the octave correction coefficient.

[0123] Based on the same inventive concept as the engine component surface vibration index determination method described above, this embodiment also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the steps of any of the engine component surface vibration index determination methods described above.

[0124] Among them, the bus architecture (represented by the bus), the bus can include any number of interconnected buses and bridges, and the bus links various circuits including one or more processors represented by the processor and the memory represented by the memory together. The bus can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art, so they will not be further described herein. The bus interface provides an interface between the bus and the receiver and transmitter. The receiver and transmitter can be the same element, that is, a transceiver, which provides a unit for communicating with various other devices on the transmission medium. The processor is responsible for managing the bus and general processing, and the memory can be used to store data used by the processor when executing operations.

[0125] Since the electronic device introduced in this embodiment is the electronic device used to implement the engine component surface vibration index determination method in the embodiments of the present invention, based on the engine component surface vibration index determination method introduced in the embodiments of the present invention, those skilled in the art can understand the specific implementation manners and various variations of the electronic device in this embodiment, so the specific implementation of how this electronic device implements the method in the embodiments of the present invention will not be described in detail here. As long as those skilled in the art implement the electronic device used for the engine component surface vibration index determination method in the embodiments of the present invention, it falls within the scope of protection of the present invention.

[0126] Based on the same inventive concept as the above method for determining the surface vibration index of engine components, the present invention also provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements any of the methods for determining the surface vibration index of engine components described above.

[0127] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0128] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one or more of the flows Figure 1 or multiple flows and / or blocks Figure 1 one or more of the blocks Figure 1 or multiple blocks.

[0129] These computer program instructions can also be stored in a computer-readable memory capable of guiding a computer or other programmable data processing devices to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means implements the functions specified in Figure 1 one or more of the flows Figure 1 or multiple flows and / or blocks

[0130] Although the preferred embodiments of the present invention have been described, additional changes and modifications can be made to these embodiments by those skilled in the art once they learn of the basic inventive concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present invention.

[0131] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A method for determining the surface vibration index of engine components, characterized in that, Including: Obtain the target value of the sound pressure level of the overall engine radiation noise; Determine the target value of the surface vibration velocity level of the engine components according to the target value of the sound pressure level; The determining the target value of the surface vibration velocity level of the engine components according to the target value of the sound pressure level includes: Determine the target value of the sound power level according to the target value of the sound pressure level; Determine the target value of the surface vibration velocity level of the engine according to the target value of the sound power level; Determine the target value of the vibration velocity level at the standard frequency according to the target value of the surface vibration velocity level of the engine; Determine the target value of the surface vibration velocity level of the components according to the center frequency of the octave band and the target value of the vibration velocity level at the standard frequency; The determining the target value of the surface vibration velocity level of the engine according to the target value of the sound power level includes: is the target value of the surface vibration velocity level of the engine, A0 is the standardized reference area, v0 is the reference velocity level, L W is the target value of the sound power level, A j is the surface area of the engine.

2. The method for determining the surface vibration index of engine components according to claim 1, characterized in that The determining the target value of the sound power level according to the target value of the sound pressure level includes: Obtain the atmospheric pressure and ambient temperature corresponding to the target value of the sound pressure level; Determine the temperature and air pressure correction coefficient according to the atmospheric pressure and the ambient temperature; Determine the target value of the sound power level according to the target value of the sound pressure level and the temperature and air pressure correction coefficient.

3. The method for determining the surface vibration index of engine components according to claim 2, wherein, The determining the temperature and air pressure correction coefficient according to the atmospheric pressure and the ambient temperature includes: C1 is the temperature and air pressure correction coefficient, B is the atmospheric pressure, B0 is the reference standard atmospheric pressure, and T is the ambient temperature.

4. The method for determining the surface vibration index of engine components according to claim 2, characterized in that The determining the target value of the sound power level according to the target value of the sound pressure level and the temperature and air pressure correction coefficient includes: L W = L P + 10·log 10 4πr 2 + C1; L W is the target value of the sound power level, L P is the target value of the sound pressure level, r is the test radius corresponding to the target value of the sound pressure level, and C1 is the temperature and air pressure correction coefficient.

5. The method for determining the surface vibration index of engine components according to claim 1, characterized in that The determining the target value of the vibration velocity level at the standard frequency according to the target value of the surface vibration velocity level of the engine includes: v j is the target value of the standard frequency vibration velocity level, is the target value of the engine surface vibration velocity level, and C2 is the octave band correction coefficient.

6. An apparatus for determining the surface vibration index of engine components, characterized in that Including: A sound pressure level target value acquisition module for obtaining the target value of the sound pressure level of the overall engine radiation noise; A surface vibration index determination module for components of the engine, which is used to determine the target value of the surface vibration velocity level of the engine components according to the target value of the sound pressure level; The determining the target value of the surface vibration velocity level of the engine components according to the target value of the sound pressure level includes: Determine the target value of the sound power level according to the target value of the sound pressure level; Determine the target value of the surface vibration velocity level of the engine according to the target value of the sound power level; Determine the target value of the vibration velocity level at the standard frequency according to the target value of the surface vibration velocity level of the engine; Determine the target value of the surface vibration velocity level of the components according to the center frequency of the octave band and the target value of the vibration velocity level at the standard frequency; The determining the target value of the surface vibration velocity level of the engine according to the target value of the sound power level includes: is the target value of the surface vibration velocity level of the engine, A0 is the standardized reference area, v0 is the reference velocity level, L W is the target value of the sound power level, A j is the surface area of the engine.

7. An electronic device, characterized in that, Including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the method for determining the surface vibration index of the engine components as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium. When the computer program is executed by the processor, it implements the method for determining the surface vibration index of the engine components as described in any one of claims 1-5.

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