Noise source determination method and device

Abstract

The embodiment of the invention provides a noise source determination method and device, and belongs to the field of mechanical equipment optimization. The method comprises the following steps: carrying out noise contribution analysis on a plurality of components of the mechanical equipment, and determining main noise source components; constructing a finite element structure model of the mechanical equipment; noise excitation is conducted on the finite element structure model to obtain noise response information, corresponding to the main noise source component, of the finite element structure model, and the noise response information comprises noise peak values under different excitation frequencies; performing equivalent radiation sound power analysis on a finite element structure model corresponding to the main noise source component according to the noise response information to obtain a first analysis result; and determining a noise main contribution position of the main noise source component according to the first analysis result and the noise peak values under different excitation frequencies. Through the method, the noise source can accurately determine the specific position on the single component, and the noise optimization of the mechanical equipment is more targeted.

Description

Technical Field

[0001] The present invention relates to the field of mechanical equipment optimization, and in particular to a noise source determination method and device. Background Art

[0002] With the continuous development of science and technology and the continuous improvement of production methods in various industries, the development of various types of mechanical equipment is accelerating. On the one hand, the use of mechanical equipment reduces the burden on operators and improves work efficiency, but on the other hand, there is mechanical noise that is difficult to eliminate. Therefore, the size of mechanical equipment noise is used by manufacturers as an important indicator for designing and testing the optimization degree of mechanical equipment.

[0003] Due to the complexity of the structure of most mechanical equipment, there are many components that serve as noise sources, and the contribution of each component to noise is also different. If each subsystem or component is optimized and modified, it is undoubtedly a non-targeted optimization method with high cost and low efficiency. Therefore, there is an urgent need for a method that can accurately determine the noise source, so that the noise optimization of mechanical equipment is more targeted. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to overcome the technical problem that the noise source in mechanical equipment cannot be accurately determined, and to provide a noise source determination method and device.

[0005] The first aspect of the present application provides a noise source determination method for mechanical equipment, comprising:

[0006] Conduct noise contribution analysis on multiple components of mechanical equipment to identify the main noise source components;

[0007] Construct finite element structural models of mechanical equipment;

[0008] Performing noise excitation on the finite element structural model to obtain noise response information of the finite element structural model corresponding to the main noise source component, wherein the noise response information includes noise peaks at different excitation frequencies;

[0009] Performing an equivalent radiated sound power analysis on a finite element structural model corresponding to a main noise source component according to the noise response information to obtain a first analysis result;

[0010] According to the first analysis result and the noise peak values ​​at different excitation frequencies, the main noise contribution position of the main noise source component is determined.

[0011] In one embodiment of the present application, noise contribution analysis is performed on multiple components of mechanical equipment to determine the main noise source components, including:

[0012] Acquire noise signals and accelerations of a plurality of incomplete mechanical devices, wherein the plurality of incomplete mechanical devices are mechanical devices after components are sequentially disconnected;

[0013] Determine the noise transfer function of mechanical equipment based on noise signals and acceleration;

[0014] Determine the noise level of each incomplete mechanical device based on the noise transfer function, noise signal and acceleration;

[0015] Determine the main noise source components based on the noise level of all incomplete mechanical equipment.

[0016] In one embodiment of the present application, obtaining noise signals and accelerations of multiple incomplete mechanical devices includes:

[0017] Acquire noise signals of multiple incomplete mechanical devices through microphones;

[0018] The acceleration of multiple incomplete mechanical devices is obtained through acceleration sensors.

[0019] In one embodiment of the present application, the first analysis result is an effective radiation power cloud diagram at multiple different excitation frequencies. According to the first analysis result and the noise peaks at different excitation frequencies, the main noise contribution position of the main noise source component is determined, including:

[0020] Determine the position where the effective radiation power is the largest in each effective radiation power cloud map;

[0021] The main noise contribution locations are determined based on the noise peaks at all locations and different excitation frequencies.

[0022] In one embodiment of the present application, before performing equivalent radiated sound power analysis on a finite element structural model corresponding to a main noise source component according to noise response information and obtaining a first analysis result, the method further includes:

[0023] determining a simulated noise transfer function based on the noise response information;

[0024] Acquiring test noise response information of the main noise source components after noise excitation is applied to the main noise source components;

[0025] determining a test noise transfer function based on the test noise response information;

[0026] It is determined whether the error between the function values ​​of the test noise transfer function and the simulated noise transfer function for the same noise excitation meets a preset error condition, and the determination result is output.

[0027] In one embodiment of the present application, the method further includes:

[0028] According to the obtained optimization change operation, the finite element structural model corresponding to the main noise contribution position is optimized and changed;

[0029] Conduct noise excitation on the finite element structural model after optimization and modification;

[0030] Performing equivalent radiated sound power analysis on the model part of the main noise source component to obtain a second analysis result;

[0031] According to the first analysis result and the second analysis result, it is determined whether the decrease range of the effective radiation power at the main noise contribution position after the optimization change is completed meets the preset optimization requirement, and the determination result is output.

[0032] In one embodiment of the present application, before performing noise contribution analysis on multiple components of a mechanical device and determining the main noise source components, the method further includes:

[0033] Acquire the first noise sound pressure of the mechanical equipment;

[0034] After judging whether the decrease range of the effective radiation power at the main noise contribution position after the optimization change is completed meets the preset optimization requirement according to the first analysis result and the second analysis result, and outputting the judgment result, the method further includes:

[0035] Acquire a second noise sound pressure of the mechanical equipment after the optimization change is completed;

[0036] The first noise sound pressure is compared with the second noise sound pressure, and a comparison result is output.

[0037] A second aspect of the present application provides a noise source determination device for mechanical equipment, the device comprising:

[0038] A main noise source component determination module is used to analyze the noise contribution of multiple components of mechanical equipment and determine the main noise source components;

[0039] Finite element structural model component module, used to construct the finite element structural model of mechanical equipment;

[0040] A noise excitation module is used to perform noise excitation on the finite element structure model to obtain noise response information of the finite element structure model corresponding to the main noise source component, wherein the noise response information includes noise peaks at different excitation frequencies;

[0041] An equivalent radiated sound power analysis module is used to perform an equivalent radiated sound power analysis on a finite element structural model corresponding to a main noise source component according to noise response information to obtain a first analysis result;

[0042] The main contribution position determination module is used to determine the main noise contribution position of the main noise source component according to the first analysis result and the noise peak value under different excitation frequencies.

[0043] The third aspect of the present application provides an electronic device, including a processor and a memory, wherein the memory stores machine executable instructions that can be executed by the processor, and the processor can execute the machine executable instructions to implement the noise source determination method provided in the first aspect of the present application.

[0044] A fourth aspect of the present application provides a computer-readable storage medium having instructions stored thereon. When the instructions are executed by a processor, the processor is configured to execute the noise source determination method provided in the first aspect of the present application.

[0045] Through the above technical solution, after the main noise source components in the mechanical equipment are determined through noise contribution analysis, the processor performs noise excitation on the finite element structural model corresponding to the main noise source components in the finite element structural model of the mechanical equipment to obtain noise response information, and then performs equivalent sound power analysis on the finite element structural model corresponding to the main noise source components based on the obtained noise response information, and determines the main noise contribution position of the main noise source components by combining the noise peaks at different excitation frequencies in the noise response information. In this way, the noise source of the mechanical equipment can be accurately determined to a specific position on a single component, so that technicians can perform more targeted noise optimization of the mechanical equipment based on the determined main noise contribution position.

[0046] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0048] Figure 1 A schematic diagram of a process of determining a noise source according to an embodiment of the present application is shown;

[0049] Figure 2 A schematic structural diagram of a noise source determination device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0050] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0051] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, reversal status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0053] During the operation of various types of mechanical equipment, noise problems are often caused by the vibration of various components. On the one hand, it affects the operating experience of the operators, and on the other hand, it affects the service life of the mechanical equipment, and even causes some major safety accidents. Mechanical equipment contains multiple components that will vibrate due to the operation of the equipment, such as wheat harvesters in agricultural operation equipment, including headers, bridges, screen boxes, screen box fans, rollers, and choppers, etc., which will respond to noise excitation. How to determine the main noise source component among multiple components, and how to determine the main noise contribution position in the main noise source component, so that technicians can make targeted optimization of this main noise contribution position, is the problem that the noise source determination method provided in the embodiment of the present application is intended to solve.

[0054] Figure 1 A schematic diagram of a noise source determination method according to an embodiment of the present application is shown. Figure 1 As shown, in one embodiment of the present application, a noise source determination method is provided for mechanical equipment, the method comprising:

[0055] Step S100: performing noise contribution analysis on multiple components of mechanical equipment to determine the main noise source components.

[0056] In the process of determining the noise source of mechanical equipment, it is first necessary to determine the main noise source components with the largest noise contribution. This process is completed by performing noise contribution analysis on multiple components of the mechanical equipment that will respond to noise excitation.

[0057] In one embodiment of the present application, performing noise contribution analysis on multiple components of a mechanical device to determine the main noise source components (step S100) includes:

[0058] Step S110: Acquire noise signals and accelerations of a plurality of incomplete mechanical devices, wherein the plurality of incomplete mechanical devices are mechanical devices after components are disconnected in sequence.

[0059] Step S120: determining the noise transfer function of the mechanical equipment according to the noise signal and the acceleration;

[0060] Step S130: determining the noise level of each incomplete mechanical device according to the noise transfer function, the noise signal and the acceleration;

[0061] Step S140: determining the main noise source components according to the noise levels of all incomplete mechanical equipment.

[0062] In the noise source determination method provided in the embodiment of the present application, the noise contribution analysis of multiple components adopts the method of disconnecting each component in turn and performing noise tests separately. The technician first disconnects a single component of the mechanical equipment, and collects the noise signal and acceleration of the incomplete mechanical equipment with the single component disconnected. Based on the incomplete mechanical equipment disconnected last time, the technician continues to disconnect a single component of the mechanical equipment again, and collects the noise signal and acceleration of the incomplete mechanical equipment. The disconnection process and data acquisition process are repeated multiple times, so that the processor obtains the noise signals and accelerations of multiple different incomplete mechanical equipment.

[0063] Exemplarily, the mechanical equipment is a wheat harvester, including a header, a bridge, a screen box, a screen box fan, a drum, a chopper and other components that respond to noise excitation. The technician first disconnects the header, and collects the noise signal and acceleration of the wheat harvester with the header disconnected in the cab of the wheat harvester. Specifically, in one embodiment of the present application, the noise signals and accelerations of multiple incomplete mechanical equipment are obtained (step S110), including:

[0064] Acquire noise signals of multiple incomplete mechanical devices through microphones;

[0065] The acceleration of multiple incomplete mechanical devices is obtained through acceleration sensors.

[0066] That is, the embodiment of the present application uses a microphone to collect the noise signal of the incomplete mechanical equipment, and uses an acceleration sensor to collect the acceleration of the incomplete mechanical equipment.

[0067] The technician disconnects the bridge again and collects the noise signal and acceleration of the wheat harvester with the header and bridge disconnected in the cab of the wheat harvester. The above disconnection process (disconnecting a new component each time) and data acquisition process are repeated multiple times, so that the processor can obtain the noise signals and accelerations of multiple different incomplete wheat harvesters.

[0068] After acquiring the noise signals and accelerations of the above-mentioned multiple incomplete mechanical devices, the processor can determine the noise transfer function of any incomplete mechanical device according to the noise signal and acceleration of the mechanical device. It can be understood by those skilled in the art that, although the disconnected components of each incomplete mechanical device are different (i.e., the noise excitation sources are different), the position where the technician collects the noise signal and acceleration remains unchanged (such as collecting in the cab of a wheat harvester), that is, the response point of the noise remains unchanged, so the noise transfer function determined by the noise signal and acceleration of each incomplete mechanical device remains unchanged.

[0069] The processor processes the noise transfer function, noise signal and acceleration to determine the noise level of each incomplete mechanical device. Exemplarily, the noise transfer function, noise signal and acceleration are input into LMS Test Lab software, and LMS Test Lab software generates a noise information picture corresponding to each incomplete mechanical device according to the noise transfer function, noise signal and acceleration to characterize the noise level of each incomplete mechanical device.

[0070] By comparing and analyzing the noise levels of all incomplete mechanical equipment, the main noise source components can be determined. For example, the mechanical equipment is a wheat harvester. If the noise level of the wheat harvester with the header disconnected is the largest, then the header can be excluded as the main noise source component. If the noise level of the wheat harvester with the header and the bridge disconnected is the largest, then the header and the bridge can be excluded as the main noise source components. By comparing and analyzing the above logic, the main noise source components in the wheat harvester can be determined.

[0071] Step S200: constructing a finite element structural model of the mechanical equipment.

[0072] After determining the main noise source components, it is necessary to determine the main noise contribution position in the main noise source components. The embodiment of the present application uses finite element simulation technology to complete this process. First, a finite element structural model of the mechanical equipment is constructed. Specifically, the technician first uses UG (Unigraphics NX, interactive CAD / CAM system) software to build a three-dimensional model of the mechanical equipment, and imports it into CAE (Computer Aided Engineering) software for finite element segmentation, assigns load boundaries, and selects the shell unit model as the type of this finite element structural model. The center of gravity and position of each component are allocated according to the measured values ​​of the three-dimensional model, and the material properties and connection relationships of each component are consistent with the actual mechanical equipment. In this way, the finite element structural model of the mechanical equipment is completed.

[0073] Step S300: performing noise excitation on the finite element structural model to obtain noise response information of the finite element structural model corresponding to the main noise source component, wherein the noise response information includes noise peaks at different excitation frequencies.

[0074] After the finite element structural model of the mechanical equipment is constructed, the technician applies noise excitation to the finite element structural model in the finite element simulation software. Specifically, the noise excitation is a frequency domain signal of different frequencies, and the noise excitation point is the rotating part on the mechanical equipment (such as the pulley on the wheat harvester), that is, a unit force with a frequency change is applied to the mechanical equipment. Exemplarily, the frequency change range is 1 Hz-300 Hz. After the finite element structural model of the mechanical equipment obtains the above-mentioned noise excitation, the finite element structural model corresponding to the main noise source component will produce a corresponding noise response. The processor obtains this noise response and processes it into corresponding noise response information, such as noise size, vibration radiation energy on the surface of the component, and noise peak at different excitation frequencies.

[0075] Step S400: performing equivalent radiated sound power analysis on the finite element structural model corresponding to the main noise source component according to the noise response information to obtain a first analysis result.

[0076] After the processor obtains the noise response information of the finite element structural model corresponding to the main noise source component, it uses this noise response information to perform equivalent radiation rope power analysis on the main noise source component to obtain the first analysis result. The equivalent radiation sound power analysis is based on the principle that under a specific excitation, the component will inevitably vibrate, causing the vibration of the air particles to propagate outward, so that the vibration energy on the surface of the component is radiated outward in the form of sound energy. Through the velocity response of the radiation surface of the component, the maximum radiation energy under a specific excitation is extracted for calculation and analysis. That is, the equivalent radiation sound power analysis can determine the effective radiation power at each position in the finite element structural model corresponding to the main noise source component under noise excitation of different frequencies.

[0077] Step S500: Determine the main noise contribution position of the main noise source component according to the first analysis result and the noise peak values ​​at different excitation frequencies.

[0078] After obtaining the first analysis result, the processor can determine the main noise contribution position of the main noise source component by combining the effective radiation power of each position of the finite element structural model corresponding to the main noise source component in the first analysis result and the noise peak value under the above-mentioned different excitation frequencies.

[0079] In one embodiment of the present application, the first analysis result is an effective radiation power cloud diagram at a plurality of different excitation frequencies, and according to the first analysis result and the noise peak values ​​at different excitation frequencies, determining the main noise contribution position of the main noise source component (step S500) includes:

[0080] Step S510: determining the position where the effective radiation power is the largest in each effective radiation power cloud map;

[0081] Step S520: determining the main noise contribution position according to the noise peaks at all positions and different excitation frequencies.

[0082] The analysis results of the equivalent radiated sound power analysis can be expressed as effective radiated sound power cloud maps under multiple different excitation frequencies. Each effective radiated sound power cloud map shows the effective radiated sound power size of each position of the main noise source component. First, the position with the largest effective radiated sound power in each effective radiated sound power cloud map is determined, and then the main noise contribution position is determined in combination with the noise peak under different excitation frequencies. Exemplarily, each effective radiated sound power cloud map has its corresponding excitation frequency. The processor can determine the effective radiated sound power cloud map corresponding to the excitation frequency with the largest noise peak, and determine that the position with the largest effective radiated sound power in the effective radiated sound power cloud map is the main noise contribution position.

[0083] After the main noise source components in the mechanical equipment are determined through noise contribution analysis through the above steps S100-S500, the processor performs noise excitation on the finite element structural model corresponding to the main noise source components in the finite element structural model of the mechanical equipment to obtain noise response information, and then performs equivalent sound power analysis on the finite element structural model corresponding to the main noise source components based on the obtained noise response information, and determines the main noise contribution position of the main noise source components in combination with the noise peaks at different excitation frequencies in the noise response information. In this way, the noise source of the mechanical equipment can be accurately determined to a specific position on a single component, so that technicians can perform more targeted noise optimization of the mechanical equipment based on the determined main noise contribution position.

[0084] In one embodiment of the present application, before performing equivalent radiated sound power analysis on the finite element structural model corresponding to the main noise source component according to the noise response information and obtaining the first analysis result (step S400), the method further includes:

[0085] Step S610: determining a simulated noise transfer function according to the noise response information;

[0086] Step S620: Acquire test noise response information of the main noise source component after the main noise source component is subjected to noise excitation;

[0087] Step S630: determining a test noise transfer function according to the test noise response information;

[0088] Step S640: determining whether the error between the function values ​​of the test noise transfer function and the simulated noise transfer function for the same noise excitation satisfies a preset error condition, and outputting the determination result.

[0089] Before performing equivalent radiated sound power analysis on the finite element structural model corresponding to the main noise source component, the technician can also test the rationality of the finite element structural model, which is completed through simulation analysis of the noise transfer function and test analysis of the noise transfer function. First, the processor can directly determine the noise transfer function in the simulation environment based on the noise response information of the finite element structural model corresponding to the main noise source component after excitation, which is recorded as the simulation noise transfer function; testing the noise transfer function requires the technician to conduct physical experiments on the main noise source components, perform noise excitation on the rotating parts of the mechanical equipment, and obtain the noise response information of the main noise source components. The processor uses this noise response information to determine the noise transfer function in the physical test environment, which is recorded as the test noise transfer function. The rationality test of the finite element structural model is completed based on the comparison of the above-mentioned simulation noise transfer function and the test noise transfer function.

[0090] If the error between the function values ​​of the test noise transfer function and the simulated noise transfer function for the same noise excitation meets the preset error condition, it means that the finite element structural model is reasonably constructed and can accurately reflect the properties of the mechanical equipment; if the error between the function values ​​of the test noise transfer function and the simulated noise transfer function for the same noise excitation does not meet the preset error condition, it means that the finite element structural model is not reasonably constructed and cannot accurately reflect the properties of the mechanical equipment, and the technician needs to adjust the finite element structural model, such as resetting the load boundary. Exemplarily, the preset error condition can be: the error between the function values ​​of the noise transfer function and the simulated noise transfer function for the same noise excitation is less than 6% of the function value of the simulated noise transfer function for this noise excitation. It can be understood by those skilled in the art that the preset error condition can be adaptively adjusted and determined according to design requirements and standards, and this application does not impose any limitation on this.

[0091] In one embodiment of the present application, the method further includes:

[0092] Step S710: optimizing and modifying the finite element structure model corresponding to the main noise contribution position according to the obtained optimization modification operation;

[0093] Step S720: performing noise excitation on the finite element structural model after the optimization and modification;

[0094] Step S730: performing equivalent radiated sound power analysis on the model portion of the main noise source component to obtain a second analysis result;

[0095] Step S740: judging whether the decrease range of the effective radiation power at the main noise contribution position after the optimization change is completed meets the preset optimization requirement according to the first analysis result and the second analysis result, and outputting the judgment result.

[0096] The determination of the main noise contribution position is to enable technicians to optimize the noise of mechanical equipment in a more targeted manner. According to the main noise contribution position, the technicians make optimization changes to the main noise source components in the finite element simulation environment. For example, the mechanical equipment is a wheat harvester, and the main noise source component is a bridge. According to the main noise contribution position on the bridge, the technicians make optimization changes to the bridge. The optimization change operation is to add reinforcement ribs, that is, to control the stiffness distribution and vibration mode of the bridge to reduce vibration and noise.

[0097] The finite element structural model after the optimization change needs to be tested for the effect of the change. The processor also performs an equivalent radiated sound power analysis after noise excitation on the finite element structural model after the optimization change to obtain a second analysis result. Comparing the first analysis result with the second analysis result, if the decrease in the effective radiated power at the main noise contribution position after the optimization change reaches the preset optimization requirement, it means that the optimization change operation is effective; if the decrease in the effective radiated power at the main noise contribution position after the optimization change does not reach the preset optimization requirement, it means that the optimization change operation needs to be performed again.

[0098] In one embodiment of the present application, before performing noise contribution analysis on multiple components of the mechanical equipment and determining the main noise source components (step S100), the method further includes:

[0099] Step S810: obtaining a first noise sound pressure of the mechanical equipment;

[0100] After determining, based on the first analysis result and the second analysis result, whether the decrease in the effective radiation power at the main noise contribution position after the optimization change is completed meets the preset optimization requirement, and outputting the determination result (step S740), the method further includes:

[0101] Acquire a second noise sound pressure of the mechanical equipment after the optimization change is completed;

[0102] The first noise sound pressure is compared with the second noise sound pressure, and a comparison result is output.

[0103] The optimization and change operation can also be tested in the mechanical equipment entity. Before performing noise contribution analysis on multiple components of the mechanical equipment, the noise sound pressure of the mechanical equipment can be collected and input into the processor, which is recorded as the first noise sound pressure. After the optimization and change operation is implemented on the mechanical equipment entity, the noise sound pressure of the mechanical equipment after the optimization and change is collected and input into the processor, which is recorded as the second noise sound pressure. The processor compares the first noise sound pressure with the second noise sound pressure and outputs the comparison result, so that the technician can judge the noise optimization effect of the mechanical equipment based on the comparison result.

[0104] Through the above technical solution, after the main noise source components in the mechanical equipment are determined through noise contribution analysis, the processor performs noise excitation on the finite element structural model corresponding to the main noise source components in the finite element structural model of the mechanical equipment to obtain noise response information, and then performs equivalent radiation sound power analysis on the finite element structural model corresponding to the main noise source components based on the obtained noise response information, and combines the noise peaks at different excitation frequencies in the noise response information to determine the main noise contribution position of the main noise source components. Moreover, before performing the equivalent radiation sound power analysis, the rationality of the finite element model will be tested based on the noise transfer function to ensure that the finite element structural model can reasonably express the properties of the mechanical equipment. In this way, the noise source of the mechanical equipment can be accurately determined to a specific position on a single component, so that technicians can perform more targeted mechanical equipment noise optimization based on the determined main noise contribution position, and the effect after noise optimization can also be reasonably analyzed and evaluated.

[0105] Figure 2 A schematic diagram of the structure of a noise source determination device according to an embodiment of the present application is shown. Figure 2 As shown, in one embodiment of the present application, a noise source determination device 1000 is provided, and the device 1000 includes:

[0106] The main noise source component determination module 1001 is used to perform noise contribution analysis on multiple components of mechanical equipment to determine the main noise source components;

[0107] Finite element structural model component module 1002, used to construct a finite element structural model of mechanical equipment;

[0108] The noise excitation module 1003 is used to perform noise excitation on the finite element structure model to obtain noise response information of the finite element structure model corresponding to the main noise source component, wherein the noise response information includes noise peaks at different excitation frequencies;

[0109] The equivalent radiated sound power analysis module 1004 is used to perform an equivalent radiated sound power analysis on the finite element structural model corresponding to the main noise source component according to the noise response information to obtain a first analysis result;

[0110] The main contribution position determination module 1005 is used to determine the main noise contribution position of the main noise source component according to the first analysis result and the noise peak values ​​under different excitation frequencies.

[0111] The noise source determination device 1000 provided in the embodiment of the present application can implement each process in the method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described here.

[0112] In one embodiment of the present application, an electronic device is provided, including a processor and a memory, wherein the memory stores machine executable instructions that can be executed by the processor, and the processor can execute the machine executable instructions to implement the noise source determination method in the above method embodiment.

[0113] In one embodiment of the present application, a machine-readable storage medium is provided. The machine-readable storage medium stores instructions. When the instructions are executed by a processor, the processor implements the noise source determination method in the above method embodiment.

[0114] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD ROM, optical storage, etc.) that include computer-usable program code.

[0115] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific way, so that the instructions stored in the computer-readable memory produce a product including an instruction device, which implements the functions specified in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide for implementing the process in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0116] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0117] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0118] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0119] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0120] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A noise source determination method, characterized in that: For use in mechanical equipment, the method comprises: Performing noise contribution analysis on multiple components of the mechanical equipment to determine the main noise source components; Constructing a finite element structural model of the mechanical equipment; Performing noise excitation on the finite element structural model to obtain noise response information of the finite element structural model corresponding to the main noise source component, wherein the noise response information includes noise peaks at different excitation frequencies; Performing an equivalent radiated sound power analysis on a finite element structural model corresponding to the main noise source component according to the noise response information to obtain a first analysis result; The main noise contribution position of the main noise source component is determined according to the first analysis result and the noise peak values ​​at different excitation frequencies.

2. The method according to claim 1, characterized in that The performing noise contribution analysis on the multiple components of the mechanical equipment to determine the main noise source components includes: Acquire noise signals and accelerations of a plurality of incomplete mechanical devices, wherein the plurality of incomplete mechanical devices are the mechanical devices after the components are disconnected in sequence; determining a noise transfer function of the mechanical device based on the noise signal and the acceleration; Determining the noise level of each of the incomplete mechanical devices according to the noise transfer function, the noise signal and the acceleration; The main noise source component is determined according to the noise levels of all the incomplete mechanical equipment.

3. The method according to claim 2, characterized in that The step of obtaining noise signals and accelerations of multiple incomplete mechanical devices includes: Acquire the noise signals of the plurality of incomplete mechanical devices through a microphone; The accelerations of the plurality of incomplete mechanical devices are acquired by an acceleration sensor.

4. The method according to claim 1, characterized in that The first analysis result is an effective radiation power cloud diagram at a plurality of different excitation frequencies, and determining the main noise contribution position of the main noise source component according to the first analysis result and the noise peak values ​​at the different excitation frequencies includes: Determine the position where the effective radiation power is the largest in each of the effective radiation power cloud maps; The main noise contribution position is determined according to all the positions and noise peaks at the different excitation frequencies.

5. The method according to claim 1, characterized in that Before performing equivalent radiated sound power analysis on the finite element structural model corresponding to the main noise source component according to the noise response information to obtain the first analysis result, the method further includes: determining a simulated noise transfer function according to the noise response information; Acquiring test noise response information of the main noise source component after noise excitation is performed on the main noise source component; determining a test noise transfer function based on the test noise response information; It is determined whether an error between the test noise transfer function and the simulated noise transfer function for the same noise excitation satisfies a preset error condition, and a result of the determination is outputted.

6. The method according to claim 1, characterized in that The method further comprises: Optimizing and modifying the finite element structural model corresponding to the main noise contribution position according to the obtained optimization modification operation; Performing noise excitation on the finite element structural model after the optimization and modification; Performing an equivalent radiated sound power analysis on the model portion of the main noise source component to obtain a second analysis result; According to the first analysis result and the second analysis result, it is determined whether the decrease in the effective radiation power at the main noise contribution position after the optimization change is completed meets the preset optimization requirement, and the determination result is output.

7. The method according to claim 6, characterized in that Before performing noise contribution analysis on the multiple components of the mechanical equipment to determine the main noise source components, the method further includes: Acquiring a first noise sound pressure of the mechanical equipment; After judging, based on the first analysis result and the second analysis result, whether the decrease range of the effective radiation power at the main noise contribution position after the optimization change is completed meets the preset optimization requirement, and outputting the judgment result, the method further includes: Acquiring a second noise sound pressure of the mechanical equipment after completing the optimization change; The first noise sound pressure is compared with the second noise sound pressure, and a comparison result is output.

8. A noise source determination device, characterized in that: For mechanical equipment, the device includes: A main noise source component determination module is used to perform noise contribution analysis on multiple components of the mechanical equipment to determine the main noise source components; A finite element structural model component module, used to construct a finite element structural model of the mechanical equipment; A noise excitation module, used for performing noise excitation on the finite element structural model to obtain noise response information of the finite element structural model corresponding to the main noise source component, wherein the noise response information includes noise peaks at different excitation frequencies; An equivalent radiated sound power analysis module is used to perform an equivalent radiated sound power analysis on the finite element structural model corresponding to the main noise source component according to the noise response information to obtain a first analysis result; The main contribution position determination module is used to determine the main noise contribution position of the main noise source component according to the first analysis result and the noise peak values ​​under the different excitation frequencies.

9. An electronic device, characterized in that: The invention comprises a processor and a memory, wherein the memory stores machine executable instructions that can be executed by the processor, and the processor can execute the machine executable instructions to implement the noise source determination method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, which, when executed by a processor, enable the processor to be configured to execute the noise source determination method according to any one of claims 1 to 7.

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