CN117852348A - Supercharger noise simulation detection method and device, electronic equipment and storage medium - Google Patents
Supercharger noise simulation detection method and device, electronic equipment and storage medium Download PDFInfo
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Abstract
The application provides a supercharger noise simulation detection method, a supercharger noise simulation detection device, electronic equipment and a storage medium, and relates to the technical field of dynamics simulation. The method comprises the following steps: based on the key parts in the supercharger and the structural parameters of the installation boundary, creating a finite element model corresponding to the supercharger and the installation boundary through a finite element tool; based on the geometric position relation, the working characteristic and the lubrication characteristic of the key parts, building a dynamic model corresponding to the finite element model through a dynamic tool; simulating the supercharger to perform variable speed operation in a preset working rotation speed range through a dynamics model, and extracting vibration response of the supercharger and an axle center track of a rotor shaft in the supercharger during the variable speed operation; based on the vibration response and the axis track, a simulation result of whether noise whistle exists in the simulation booster during the speed change operation is obtained. Thus, the accuracy and the reliability of the simulation detection of the noise of the supercharger are improved.
Description
Technical Field
The invention relates to the technical field of dynamics simulation, in particular to a supercharger noise simulation detection method, a supercharger noise simulation detection device, electronic equipment and a storage medium.
Background
The booster in the vehicle is used as a core part of the booster type, and noise generated by the booster in the working process can influence the riding experience comfort of drivers and passengers. At present, regarding the research of the problem of the vibration noise of the supercharger, one is to use the supercharger of the real object to carry out the example test; the other is to separately study the influence of local structural characteristics of the supercharger (such as a rotor of the supercharger) on noise through an equivalent simplified simulation form. In engineering, the discovery of the problem of the vibration noise of the supercharger of a real object is mainly focused on experimental measurement and subjective evaluation in the middle and later stages of the project, and the development requirement of fast rhythm is difficult to meet. With respect to the simulation of the supercharger, after equivalent simplification, fewer factors are considered in the simulation process, and the structure and working condition of the supercharger in the actual working process exist in and out, so that noise simulation detection cannot be accurately realized.
Disclosure of Invention
In view of the foregoing, an object of an embodiment of the present application is to provide a method, an apparatus, an electronic device, and a storage medium for detecting noise simulation of a supercharger, which can solve the problem of inaccuracy in detecting noise simulation of a supercharger.
In order to achieve the technical purpose, the technical scheme adopted by the application is as follows:
In a first aspect, an embodiment of the present application provides a supercharger noise simulation detection method, where the method includes:
based on the key parts in the supercharger and the structural parameters of the installation boundary, creating a finite element model corresponding to the supercharger and the installation boundary through a finite element tool;
based on the geometric position relation, the working characteristic and the lubrication characteristic of the key parts, building a dynamic model corresponding to the finite element model through a dynamic tool;
simulating the supercharger to perform variable speed operation in a preset working rotating speed range through the dynamics model, and extracting vibration response of the supercharger and an axle center track of a rotor shaft in the supercharger during the variable speed operation;
and obtaining a simulation result for simulating whether noise whistle exists in the supercharger during the speed change operation based on the vibration response and the axle center track.
With reference to the first aspect, in some optional embodiments, the key components include a compressor housing, a turbine housing, an intermediate body, a compressor, a turbine, a rotor shaft, and a floating bearing, and the mounting boundary is an engine cylinder head;
based on the key parts in the supercharger and the structural parameters of the installation boundary, creating a finite element model corresponding to the supercharger and the installation boundary by a finite element tool, wherein the finite element model comprises the following components:
And creating a finite element model with the same size ratio as the key parts and the engine cylinder cover through the finite element tool, wherein in the finite element model, the engine cylinder cover is connected with the turbine shell through bolts, the intermediate body is connected with the compressor shell and the turbine shell through nodes in a sharing way, the rotor shaft is connected with the compressor and the turbine through nodes in a sharing way, and the finite element model comprises independent sub-models corresponding to the floating bearings.
With reference to the first aspect, in some optional embodiments, building, by a dynamics tool, a dynamics model corresponding to the finite element model based on a geometric positional relationship, an operating characteristic, and a lubrication characteristic of the key component includes:
building a dynamics module corresponding to each sub-model in the finite element model through the dynamics tool to form the dynamics model;
wherein in the dynamic model, based on the geometric positional relationship of the key parts, the compressor housing, the turbine housing, the intermediate body, the compressor, the turbine, the rotor shaft and the floating bearing are coupled and associated, and the material properties of the key parts are defined as flexible bodies;
Setting an operating temperature range of the dynamic model and setting an oil film contact attribute between sliding friction pairs in the key parts based on the operating characteristics of the supercharger;
and setting the pressure, viscosity and working temperature range of the lubricating oil in the dynamic model based on the lubricating characteristic.
With reference to the first aspect, in some alternative embodiments, the sliding friction pair includes a first friction pair formed by a journal of the rotor shaft and the floating bearing, and a second friction pair formed by the floating bearing and a bearing housing in the supercharger.
With reference to the first aspect, in some optional embodiments, simulating, by the dynamics model, the supercharger to perform variable speed operation within a preset operating speed range includes:
dividing the actual working rotation speed range of the supercharger into M rotation speed intervals, wherein each rotation speed interval is used as the preset working rotation speed range, and M is an integer greater than or equal to 1;
and simulating the booster to perform up-running and/or down-running in M preset working speed ranges through the dynamic model.
With reference to the first aspect, in some optional embodiments, the vibration response is a vibration acceleration of a surface of a housing in the supercharger, and based on the vibration response and the axis locus, a simulation result for simulating whether noise squeal exists in the supercharger during a speed change operation is obtained, including:
Dividing the order components of the vibration acceleration;
if the first-order component in the vibration acceleration is larger than or equal to the preset threshold value of the order component, a simulation result for simulating noise squeal of the supercharger during variable speed operation is obtained, and the squeal type is synchronous noise squeal caused by rotor imbalance;
if the components in the vibration acceleration within the first designated order range are larger than or equal to the order component preset threshold, and the axis track accompanies the forward motion phenomenon, a simulation result for simulating noise whistle of the supercharger during variable speed operation is obtained, and the whistle type is subsynchronous noise whistle caused by external oil film whirling in the supercharger;
if the component in the second designated order range in the vibration acceleration is greater than or equal to the preset threshold value of the order component, and the axis track accompanies the forward motion phenomenon, a simulation result for simulating noise whistle of the supercharger during variable speed operation is obtained, and the whistle type is subsynchronous noise whistle caused by internal oil film whirling in the supercharger.
With reference to the first aspect, in some optional embodiments, the floating bearing in the supercharger is a sliding bearing, the first specified order ranges from 0.1 to 0.3, and the second specified order ranges from 0.4 to 0.5.
With reference to the first aspect, in some optional embodiments, the method further includes:
and when the simulation result shows that noise howling exists, optimizing the finite element model based on an optimization strategy corresponding to the howling type.
With reference to the first aspect, in some optional embodiments, the key components include a compressor housing, a turbine housing, an intermediate body, a compressor, a turbine, a rotor shaft, and a floating bearing, and optimizing the finite element model based on an optimization strategy corresponding to the squeal type includes:
when the howling type is the synchronous noise howling, adjusting a sub-model structure of at least one of the rotor shaft, the impeller of the compressor and the impeller of the turbine in the finite element model;
and when the squeal type is the subsynchronous noise squeal, in the finite element model, adjusting at least one structural parameter of the width of the floating bearing, the fit clearance between the rotor shaft and the floating bearing, the fit clearance between the floating bearing and a bearing seat in the supercharger, the outer diameter of the floating bearing and an oil groove hole in the supercharger.
With reference to the first aspect, in some optional embodiments, the method further includes:
acquiring a modal frequency of a shell of the supercharger based on the finite element model, and acquiring a surface vibration acceleration peak frequency of the shell of the supercharger based on the dynamics model;
and when the modal frequency is coupled with the peak frequency, performing frequency avoidance optimization on the shell of the supercharger so as to avoid the modal frequency of the shell of the supercharger from the peak frequency.
In a second aspect, an embodiment of the present application further provides a supercharger noise simulation detection apparatus, where the apparatus includes:
the first creating unit is used for creating a finite element model corresponding to the supercharger and the installation boundary through a finite element tool based on the key parts in the supercharger and the structural parameters of the installation boundary;
the second creating unit builds a dynamic model corresponding to the finite element model through a dynamic tool based on the geometric position relation, the working characteristic and the lubrication characteristic of the key parts;
the simulation unit is used for simulating the speed change operation of the supercharger in a preset working speed range through the dynamics model and extracting the vibration response of the supercharger and the axis track of a rotor shaft in the supercharger during the speed change operation;
And the detection unit is used for obtaining a simulation result for simulating whether noise and whistle exist in the supercharger during the speed change operation or not based on the vibration response and the axle center track.
In a third aspect, an embodiment of the present application further provides an electronic device, where the electronic device includes a processor and a memory coupled to each other, where the memory stores a computer program, and when the computer program is executed by the processor, causes the electronic device to perform the method described above.
In a fourth aspect, embodiments of the present application further provide a computer readable storage medium, where a computer program is stored, which when run on a computer, causes the computer to perform the above-mentioned method.
The invention adopting the technical scheme has the following advantages:
in the technical scheme provided by the application, a finite element model is created by utilizing the key parts in the supercharger and the structural parameters of the installation boundary; and building a dynamic model corresponding to the finite element model by utilizing the geometric position relation, the working characteristic and the lubrication characteristic of the key parts. In the simulation process, the geometrical position relation, the working characteristic and the lubrication characteristic of key parts are considered, namely the structural working characteristic of the supercharger and the influence of installation on the dynamics of the supercharger are more fully considered, so that the structure and the running condition of the supercharger simulated by the dynamics model are more similar to those of a physical supercharger. And then, simulating the supercharger to perform variable speed operation within a preset working speed range by using a dynamic model, extracting the vibration response of the supercharger and the axis track of a rotor shaft in the supercharger during the variable speed operation, and finally, analyzing and obtaining a simulation result of whether noise whistle exists in the supercharger during the variable speed operation based on the vibration response and the axis track. Because the structure and the running condition of the simulated supercharger are similar to those of the physical supercharger, the actual running data of the physical supercharger is also attached based on the vibration response and the axis track obtained through simulation, namely, the simulated supercharger and the physical supercharger are similar in structure and running condition, and the accuracy and the reliability of noise simulation detection are improved when noise whistle detection is carried out.
Drawings
The present application may be further illustrated by the non-limiting examples given in the accompanying drawings. It is to be understood that the following drawings illustrate only certain embodiments of the present application and are therefore not to be considered limiting of its scope, for the person of ordinary skill in the art may derive other relevant drawings from the drawings without inventive effort.
Fig. 1 is a flow chart of a supercharger noise simulation detection method provided in an embodiment of the present application.
Fig. 2 is a schematic diagram of key components and installation boundaries of the supercharger provided in the embodiment of the present application.
Fig. 3 is a schematic diagram of surface vibration of a simulated supercharger provided in an embodiment of the present application.
Fig. 4 is a schematic diagram of an axial locus of a rotor shaft of a simulated supercharger according to an embodiment of the present application.
Fig. 5 is a schematic diagram of surface order vibration of a simulated supercharger provided in an embodiment of the present application.
Fig. 6 is a block diagram of a supercharger noise simulation detection device provided in an embodiment of the present application.
Icon: 1-an engine cylinder cover; 2-a compressor housing; 3-a turbine housing; 4-intermediates; 5-a compressor; 6-a turbine; 7-rotor shaft; 8-floating bearings; 200-a supercharger noise simulation detection device; 210-a first creation unit; 220-a second creation unit; 230-a simulation unit; 240-detection unit.
Detailed Description
The present application will be described in detail below with reference to the drawings and the specific embodiments, and it should be noted that in the drawings or the description of the specification, similar or identical parts use the same reference numerals, and implementations not shown or described in the drawings are in a form known to those of ordinary skill in the art. In the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
First embodiment
Referring to fig. 1, the present application provides a supercharger noise simulation detection method, where each step of the method may be implemented by an electronic device or implemented by the electronic device in cooperation with manual operation. The supercharger noise simulation detection method may include the following steps:
step 110, creating a finite element model corresponding to the supercharger and the installation boundary through a finite element tool based on the key parts in the supercharger and the structural parameters of the installation boundary;
step 120, building a dynamic model corresponding to the finite element model through a dynamic tool based on the geometric position relation, the working characteristic and the lubrication characteristic of the key parts;
Step 130, simulating the supercharger to perform variable speed operation within a preset working rotation speed range through the dynamics model, and extracting vibration response of the supercharger and an axle center track of a rotor shaft 7 in the supercharger during the variable speed operation;
and 140, obtaining a simulation result for simulating whether noise whistle exists in the supercharger during the speed change operation or not based on the vibration response and the axis track.
The following will explain the steps of the supercharger noise simulation detection method in detail, as follows:
referring to fig. 2, the installation boundary may be the engine head 1. Key components of the supercharger may include, but are not limited to, compressor housing 2, turbine housing 3, intermediate body 4, compressor 5, turbine 6, rotor shaft 7, and floating bearing 8. The housing of the supercharger may include a compressor housing 2, a turbine housing 3, and an intermediate body 4.
In this embodiment, step 110 may include:
based on the key parts in the supercharger and the structural parameters of the installation boundary, creating a finite element model corresponding to the supercharger and the installation boundary by a finite element tool, wherein the finite element model comprises the following components:
through the finite element tool, a finite element model with the same size proportion as the key parts and the engine cylinder cover 1 is created, in the finite element model, the engine cylinder cover 1 and the turbine shell 3 are connected through bolts, the intermediate body 4, the compressor shell 2 and the turbine shell 3 are connected through node sharing, the rotor shaft 7, the compressor 5 and the turbine 6 are connected through node sharing, and the finite element model comprises independent submodels corresponding to the floating bearings 8.
In this embodiment, the structural parameters may include dimensional parameters of each component, and may be flexibly set according to actual situations. An engineer can create a finite element sub-model corresponding to each component using a finite element tool, all of which constitute the finite element model of the supercharger and the installation boundary.
In the finite element model, the connection relation of each sub-model is consistent with the connection relation of the physical supercharger and the engine cylinder cover 1, so that the effectiveness and the reliability of the simulation test are improved, and the simulation error caused by the simplification of structural equivalent is reduced. That is, the engine head 1 is connected to the turbine housing 3 by bolts, the intermediate body 4 is connected to the compressor housing 2 and the turbine housing 3 by nodes in a shared manner, the rotor shaft 7 is connected to the compressor 5 and the turbine 6 by nodes in a shared manner, and the floating bearing 8 alone establishes a finite element sub-model.
In this embodiment, the finite element tool and the dynamics tool described below may be independent software tools, or they may be integrated into one software tool. The finite element tool and the dynamic tool can be flexibly selected according to actual conditions. As one example, the finite element tool may be, but is not limited to, an ANSYS software tool. The kinetic tool may be, but is not limited to, a dyro be software tool.
Because the heat load of the supercharger is higher in actual working, the elastic modulus of the material is greatly influenced, and the calculation accuracy of the structural response is further influenced. Therefore, considering the influence of temperature on the material performance, the elastic modulus of the finite element model is set according to the actual working temperature range of the supercharger, so that higher simulation calculation accuracy can be obtained.
In step 120, the geometric positional relationship of the key components refers to the spatial positional relationship, connection relationship, and the like of the components. The operating characteristics may include the actual operating temperature range of the supercharger, the material properties of the various components being flexible bodies, the actual operating boundaries of the rotor shaft 7, etc. The lubricating characteristics may include operating temperature range, viscosity, pressure, etc. of the lubricating oil.
In this embodiment, step 120 may include:
building a dynamics module corresponding to each sub-model in the finite element model through the dynamics tool to form the dynamics model;
wherein in the dynamic model, based on the geometric positional relationship of the key parts, the compressor housing 2, the turbine housing 3, the intermediate body 4, the compressor 5, the turbine 6, the rotor shaft 7 and the floating bearing 8 are coupled and associated, and the material properties of the key parts are defined as flexible bodies;
Setting an operating temperature range of the dynamic model and setting an oil film contact attribute between sliding friction pairs in the key parts based on the operating characteristics of the supercharger;
and setting the pressure, viscosity and working temperature range of the lubricating oil in the dynamic model based on the lubricating characteristic.
In the present embodiment, the dynamics model includes dynamics modules corresponding to each component of the compressor housing 2, the turbine housing 3, the intermediate body 4, the compressor 5, the turbine 6, the rotor shaft 7, the floating bearing 8, and the engine cylinder head 1, and each dynamics module is used for simulating the motion condition of the corresponding component in the running process of the supercharger, so as to extract the surface vibration response of the supercharger housing and the axis track of the rotor shaft 7.
It will be appreciated that in creating the kinetic model, in the kinetic tool, the components may be coupled together according to the geometric positional relationship of the compressor housing 2, the turbine housing 3, the intermediate body 4, the compressor 5, the turbine 6, the rotor shaft 7 and the floating bearing 8, and the components may be defined as a flexible body. In addition, the properties of the lubricating oil (such as operating temperature, viscosity, pressure, etc.) in the kinetic model are defined based on the actual operating temperature of the supercharger and the lubricating oil used. The sliding friction pair comprises a first friction pair formed by the journal of the rotor shaft 7 and the floating bearing 8, and a second friction pair formed by the floating bearing 8 and the bearing housing in the supercharger. That is, the engineer can define the oil film contact property between the journal-floating bearing 8-bearing housing or the like sliding friction pair of the rotor shaft 7 according to the actual working boundary of the rotor. Thus, the created dynamic model can more closely simulate the actual running condition of the supercharger.
In this embodiment, the operating temperature range of the dynamic model and the operating temperature range of the finite element model may be flexibly set according to practical situations, and as an example, the operating temperature ranges of the dynamic model and the finite element model may be 600 ℃ to 800 ℃.
In step 130, simulating, by the dynamics model, the supercharger to perform a variable speed operation within a preset operating speed range may include:
dividing the actual working rotation speed range of the supercharger into M rotation speed intervals, wherein each rotation speed interval is used as the preset working rotation speed range, and M is an integer greater than or equal to 1;
and simulating the booster to perform up-running and/or down-running in M preset working speed ranges through the dynamic model.
In this embodiment, the actual working rotation speed range of the supercharger may be flexibly set according to the actual situation. As an example, the actual operating speed range may be 10000rpm-200000rpm. The number M of divided rotation speed sections may be flexibly determined according to practical situations, and as an example, 10000rpm to 200000rpm may be equally divided into 19 rotation speed sections.
In the process of simulating the variable speed operation of the supercharger, the rotating speed of the supercharger can be simulated to rise from 10000rpm to 200000rpm; or from 200000rpm to 10000rpm; or, for different rotation speed intervals, a combination of speed increasing and speed decreasing can be selected to realize the simulation of the variable speed operation of the supercharger. Namely, by covering the actual working rotation speed range of the supercharger so as to simulate variable speed operation, the simulation test of different rotation speeds can be more fully realized, and the coverage of the simulation test can be improved.
Referring to fig. 4 and 5 in combination, in step 130, the vibration acceleration of the surface of the simulated supercharger housing (referred to as the turbine housing 3-intermediate 4-compressor housing 2) and the axial locus of the rotor shaft 7 may be extracted using a dynamic model.
In this embodiment, the vibration response is a vibration acceleration of a surface of a housing in the supercharger, and step 140 may include:
dividing the order components of the vibration acceleration;
if the first-order component in the vibration acceleration is larger than or equal to the preset threshold value of the order component, a simulation result for simulating noise squeal of the supercharger during variable speed operation is obtained, and the squeal type is synchronous noise squeal caused by rotor imbalance;
if the components in the vibration acceleration within the first designated order range are larger than or equal to the order component preset threshold, and the axis track accompanies the forward motion phenomenon, a simulation result for simulating noise whistle of the supercharger during variable speed operation is obtained, and the whistle type is subsynchronous noise whistle caused by external oil film whirling in the supercharger;
if the component in the second designated order range in the vibration acceleration is greater than or equal to the preset threshold value of the order component, and the axis track accompanies the forward motion phenomenon, a simulation result for simulating noise whistle of the supercharger during variable speed operation is obtained, and the whistle type is subsynchronous noise whistle caused by internal oil film whirling in the supercharger.
In this embodiment, the electronic device may perform frequency domain analysis and order analysis on the calculated vibration response of the surface of the supercharger housing, and classify the supercharger squeal type according to the frequency domain characteristic and the order characteristic. The preset threshold value of the order component can be set according to the actual situation. When the floating bearing 8 in the supercharger is a slide bearing, the first prescribed order range is 0.1 to 0.3 order, and the second prescribed order range is 0.4 to 0.5 order.
As an example, frequency domain analysis and order analysis are performed on the vibration acceleration of the surface of the housing in the time domain, and vibration acceleration values in different frequency components and different order components are extracted, and the vibration of the surface of the housing is as shown in fig. 5. If the first-order component is more than or equal to the preset threshold value of the order component, determining that the howling fault type is synchronous noise howling caused by rotor imbalance; if the 0.4-0.5-order component is more than or equal to the preset threshold value of the order component and the rotor shaft 7 heart track accompanies the forward motion phenomenon, determining the howling type as subsynchronous noise howling caused by internal oil film whirling; if the 0.1-0.3 order component is greater than or equal to the order component preset threshold and the rotor shaft 7 heart track accompanies the forward motion phenomenon, the howling type is judged to be subsynchronous noise howling caused by external oil film whirling.
As an alternative embodiment, the method may further comprise:
and step 150, when the simulation result indicates that noise howling exists, optimizing the finite element model based on an optimization strategy corresponding to the howling type.
Wherein optimizing the finite element model based on an optimization strategy corresponding to the howling type may include:
when the howling type is the synchronous noise howling, adjusting a sub-model structure of at least one of the rotor shaft 7, the impeller of the compressor 5, and the impeller of the turbine 6 in the finite element model;
when the squeal type is the subsynchronous noise squeal, at least one structural parameter of the width of the floating bearing 8, the fit clearance of the rotor shaft 7 and the floating bearing 8, the fit clearance of the floating bearing 8 and a bearing seat in the supercharger, the outer diameter of the floating bearing 8 and an oil groove hole in the supercharger is adjusted in the finite element model.
In this embodiment, an engineer or the electronic device may perform optimization analysis for different fault types, where different howling types correspond to different optimization strategies. As an example, if the howling type is synchronous noise howling, the direction to be optimized is the unbalance amount of the rotor system (rotor shaft 7, compressor 5 impeller, turbine 6 impeller), and mainly involves the manufacture of parts and the optimization of the installation position, for example, the size of the rotor shaft 7 is adjusted in a finite element model. If the squeal type is subsynchronous noise squeal, parameters to be optimized are bearing width, rotor shaft 7-floating bearing 8 fit clearance, floating bearing 8-bearing seat fit clearance, bearing outer diameter, oil groove oil hole, lubricating oil viscosity and the like. In this way, an optimized finite element model can be obtained.
Based on the optimized finite element model, the steps 120 to 140 may be repeated, or the steps 120 to 150 may be repeated until the structure of the optimized supercharger has no noise and howling in the simulation operation process. Therefore, the method is favorable for realizing the rapid design and optimization of the supercharger products, shortening the product design period and improving the product design efficiency through the simulation test and optimization of the supercharger noise.
As an alternative embodiment, the method further comprises:
acquiring a modal frequency of a shell of the supercharger based on the finite element model, and acquiring a surface vibration acceleration peak frequency of the shell of the supercharger based on the dynamics model;
and when the modal frequency is coupled with the peak frequency, performing frequency avoidance optimization on the shell of the supercharger so as to avoid the modal frequency of the shell of the supercharger from the peak frequency.
Referring to fig. 3, using the finite element model, the modal frequencies of the supercharger housing (turbine housing 3-intermediate 4-compressor housing 2) within 3000Hz in the state of the engine head 1 can be calculated, as shown in fig. 3. The peak frequency of the surface vibration acceleration of the supercharger housing can be extracted by using a dynamic model. If the modal frequency coincides with the peak frequency, the modal frequency and the peak frequency are coupled, and frequency avoidance optimization is needed to improve the resonance problem of the supercharger. The mode of avoiding frequency optimization can be, but is not limited to, adjusting the size, structure, installation position and the like of each part in the supercharger.
Based on the design, the influence of the structural working characteristic and the installation characteristic of the supercharger on the dynamics of the supercharger is fully considered by establishing the finite element model of the supercharger installation boundary and the finite element model of the key parts of the supercharger considering the thermal expansion, so that the calculation error caused by the structural equivalent simplification is avoided. In addition, key parts and installation boundaries are set to be flexible bodies in the supercharger dynamics model, the coupling effect of a supercharger structure, lubricating oil and a floating bearing 8 is comprehensively considered, and guarantee is provided for accurately predicting the whistle type of the supercharger. In the scheme, the method for predicting synchronous noise and subsynchronous noise through the vibration characteristics of the surface shell of the supercharger and the optimization logic are as follows: the squeal type is determined by computing and analyzing the order component of the surface vibration acceleration of the supercharger housing, indicating the direction for the supercharger structural parameter optimization, and further determining whether the structure optimization of the supercharger-mounting boundary is performed by comparing and analyzing whether the vibration acceleration frequency is coupled with the structure natural frequency. According to the method, synchronous noise howling and subsynchronous noise howling of the supercharger can be rapidly predicted in the early stage of a project of supercharger design, and the forward design matching is achieved.
Second embodiment
Referring to fig. 6, the present application further provides a supercharger noise simulation detection apparatus 200, where the supercharger noise simulation detection apparatus 200 includes at least one software functional module that may be stored in a memory module in the form of software or Firmware (Firmware) or cured in an Operating System (OS) of an electronic device. The processing module is configured to execute executable modules stored in the storage module, such as a software function module and a computer program included in the supercharger noise simulation detection apparatus 200.
The functions of each unit included in the supercharger noise simulation detection device 200 may be as follows:
a first creation unit 210 that creates a finite element model corresponding to a supercharger and an installation boundary by a finite element tool based on structural parameters of key parts and the installation boundary in the supercharger;
the second creating unit 220 builds a dynamic model corresponding to the finite element model through a dynamic tool based on the geometric position relation, the working characteristic and the lubrication characteristic of the key parts;
a simulation unit 230 for simulating a speed change operation of the supercharger in a preset operating speed range by the dynamics model, and extracting a vibration response of the supercharger and an axial locus of the rotor shaft 7 in the supercharger during the speed change operation;
And the detecting unit 240 is configured to obtain a simulation result for simulating whether noise whistle exists in the supercharger during the speed change operation based on the vibration response and the axis locus.
Specifically, the first creation unit 210 may be configured to: through the finite element tool, a finite element model with the same size proportion as the key parts and the engine cylinder cover 1 is created, in the finite element model, the engine cylinder cover 1 and the turbine shell 3 are connected through bolts, the intermediate body 4, the compressor shell 2 and the turbine shell 3 are connected through node sharing, the rotor shaft 7, the compressor 5 and the turbine 6 are connected through node sharing, and the finite element model comprises independent submodels corresponding to the floating bearings 8.
The second creation unit 220 may be configured to: building a dynamics module corresponding to each sub-model in the finite element model through the dynamics tool to form the dynamics model; wherein in the dynamic model, based on the geometric positional relationship of the key parts, the compressor housing 2, the turbine housing 3, the intermediate body 4, the compressor 5, the turbine 6, the rotor shaft 7 and the floating bearing 8 are coupled and associated, and the material properties of the key parts are defined as flexible bodies; setting an operating temperature range of the dynamic model and setting an oil film contact attribute between sliding friction pairs in the key parts based on the operating characteristics of the supercharger; and setting the pressure, viscosity and working temperature range of the lubricating oil in the dynamic model based on the lubricating characteristic.
The simulation unit 230 may be configured to: dividing the actual working rotation speed range of the supercharger into M rotation speed intervals, wherein each rotation speed interval is used as the preset working rotation speed range, and M is an integer greater than or equal to 1; and simulating the booster to perform up-running and/or down-running in M preset working speed ranges through the dynamic model.
Specifically, the vibration response may be a vibration acceleration of a housing surface in the supercharger, and the detection unit 240 may be configured to:
dividing the order components of the vibration acceleration;
if the first-order component in the vibration acceleration is larger than or equal to the preset threshold value of the order component, a simulation result for simulating noise squeal of the supercharger during variable speed operation is obtained, and the squeal type is synchronous noise squeal caused by rotor imbalance;
if the components in the vibration acceleration within the first designated order range are larger than or equal to the order component preset threshold, and the axis track accompanies the forward motion phenomenon, a simulation result for simulating noise whistle of the supercharger during variable speed operation is obtained, and the whistle type is subsynchronous noise whistle caused by external oil film whirling in the supercharger;
If the component in the second designated order range in the vibration acceleration is greater than or equal to the preset threshold value of the order component, and the axis track accompanies the forward motion phenomenon, a simulation result for simulating noise whistle of the supercharger during variable speed operation is obtained, and the whistle type is subsynchronous noise whistle caused by internal oil film whirling in the supercharger.
The floating bearing 8 in the supercharger is a sliding bearing, the first specified order range is 0.1 to 0.3 order, and the second specified order range is 0.4 to 0.5 order.
Optionally, the supercharger noise simulation detection apparatus 200 may further include a first optimization unit. The first optimizing unit is used for: and when the simulation result shows that noise howling exists, optimizing the finite element model based on an optimization strategy corresponding to the howling type.
Specifically, the first optimizing unit may be configured to:
when the howling type is the synchronous noise howling, adjusting a sub-model structure of at least one of the rotor shaft 7, the impeller of the compressor 5, and the impeller of the turbine 6 in the finite element model;
when the squeal type is the subsynchronous noise squeal, at least one structural parameter of the width of the floating bearing 8, the fit clearance of the rotor shaft 7 and the floating bearing 8, the fit clearance of the floating bearing 8 and a bearing seat in the supercharger, the outer diameter of the floating bearing 8 and an oil groove hole in the supercharger is adjusted in the finite element model.
Optionally, the supercharger noise simulation detection apparatus 200 may further include an acquisition unit and a second optimization unit. The acquisition unit is used for acquiring the modal frequency of the shell of the supercharger based on the finite element model and acquiring the surface vibration acceleration peak frequency of the shell of the supercharger based on the dynamics model; the second optimizing unit is used for conducting frequency avoidance optimization on the shell of the supercharger when the modal frequency is coupled with the peak frequency, so that the modal frequency of the shell of the supercharger avoids the peak frequency.
It should be noted that, for convenience and brevity of description, the specific working process of the supercharger noise simulation detection device 200 described above may refer to the corresponding process of each step in the foregoing method, and will not be described in detail herein.
Third embodiment
The embodiment of the application also provides electronic equipment, which can comprise a processing module and a storage module. The memory module stores a computer program that, when executed by the processing module, enables the electronic device to perform the respective steps in the supercharger noise simulation detection method described below. The electronic device may be, but is not limited to, a personal computer, a server, etc.
In this embodiment, the processing module may be an integrated circuit chip with signal processing capability. The processing module may be a general purpose processor. For example, the processor may be a central processing unit (Central Processing Unit, CPU), digital signal processor (Digital Signal Processing, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application.
The memory module may be, but is not limited to, random access memory, read only memory, programmable read only memory, erasable programmable read only memory, electrically erasable programmable read only memory, and the like. In this embodiment, the storage module may be configured to store a finite element model, a dynamics model, a simulation result, and the like, which correspond to the supercharger and the installation boundary. Of course, the storage module may also be used to store a program, and the processing module executes the program after receiving the execution instruction.
It should be noted that, for convenience and brevity of description, specific working processes of the electronic device described above may refer to corresponding processes of each step in the foregoing method, and will not be described in detail herein.
Fourth embodiment
Embodiments of the present application also provide a computer-readable storage medium. The computer-readable storage medium has stored therein a computer program which, when run on a computer, causes the computer to execute the supercharger noise simulation detection method as described in the above embodiments.
From the foregoing description of the embodiments, it will be apparent to those skilled in the art that the present application may be implemented in hardware, or by means of software plus a necessary general hardware platform, and based on this understanding, the technical solution of the present application may be embodied in the form of a software product, where the software product may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disc, a mobile hard disk, etc.), and includes several instructions to cause a computer device (may be a personal computer, an electronic device, or a network device, etc.) to perform the methods described in the respective implementation scenarios of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus, device and method may be implemented in other manners as well. The apparatus, device, and method embodiments described above are merely illustrative, for example, flow diagrams and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. In addition, the functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.
The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application, and various modifications and variations may be suggested to one skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (13)
1. A supercharger noise simulation detection method, characterized in that the method comprises:
based on the key parts in the supercharger and the structural parameters of the installation boundary, creating a finite element model corresponding to the supercharger and the installation boundary through a finite element tool;
based on the geometric position relation, the working characteristic and the lubrication characteristic of the key parts, building a dynamic model corresponding to the finite element model through a dynamic tool;
simulating the supercharger to perform variable speed operation in a preset working rotating speed range through the dynamics model, and extracting vibration response of the supercharger and an axle center track of a rotor shaft in the supercharger during the variable speed operation;
and obtaining a simulation result for simulating whether noise whistle exists in the supercharger during the speed change operation based on the vibration response and the axle center track.
2. The method of claim 1, wherein the critical components include a compressor housing, a turbine housing, an intermediate body, a compressor, a turbine, a rotor shaft, and a floating bearing, the mounting boundary being an engine head;
based on the key parts in the supercharger and the structural parameters of the installation boundary, creating a finite element model corresponding to the supercharger and the installation boundary by a finite element tool, wherein the finite element model comprises the following components:
and creating a finite element model with the same size ratio as the key parts and the engine cylinder cover through the finite element tool, wherein in the finite element model, the engine cylinder cover is connected with the turbine shell through bolts, the intermediate body is connected with the compressor shell and the turbine shell through nodes in a sharing way, the rotor shaft is connected with the compressor and the turbine through nodes in a sharing way, and the finite element model comprises independent sub-models corresponding to the floating bearings.
3. The method according to claim 2, wherein building a dynamics model corresponding to the finite element model by a dynamics tool based on the geometric positional relationship, the operating characteristics, and the lubrication characteristics of the key parts, comprises:
Building a dynamics module corresponding to each sub-model in the finite element model through the dynamics tool to form the dynamics model;
wherein in the dynamic model, based on the geometric positional relationship of the key parts, the compressor housing, the turbine housing, the intermediate body, the compressor, the turbine, the rotor shaft and the floating bearing are coupled and associated, and the material properties of the key parts are defined as flexible bodies;
setting an operating temperature range of the dynamic model and setting an oil film contact attribute between sliding friction pairs in the key parts based on the operating characteristics of the supercharger;
and setting the pressure, viscosity and working temperature range of the lubricating oil in the dynamic model based on the lubricating characteristic.
4. A method according to claim 3, wherein the sliding friction pair comprises a first friction pair formed by a journal of the rotor shaft and the floating bearing, and a second friction pair formed by the floating bearing and a bearing housing in the supercharger.
5. The method of claim 1, wherein simulating, by the dynamics model, the variable speed operation of the supercharger over a predetermined operating speed range comprises:
Dividing the actual working rotation speed range of the supercharger into M rotation speed intervals, wherein each rotation speed interval is used as the preset working rotation speed range, and M is an integer greater than or equal to 1;
and simulating the booster to perform up-running and/or down-running in M preset working speed ranges through the dynamic model.
6. The method of any one of claims 1-5, wherein the vibrational response is a vibrational acceleration of a housing surface in the supercharger;
based on the vibration response and the axis track, a simulation result for simulating whether noise whistle exists in the supercharger during the speed change operation is obtained, and the simulation result comprises the following steps:
dividing the order components of the vibration acceleration;
if the first-order component in the vibration acceleration is larger than or equal to the preset threshold value of the order component, a simulation result for simulating noise squeal of the supercharger during variable speed operation is obtained, and the squeal type is synchronous noise squeal caused by rotor imbalance;
if the components in the vibration acceleration within the first designated order range are larger than or equal to the order component preset threshold, and the axis track accompanies the forward motion phenomenon, a simulation result for simulating noise whistle of the supercharger during variable speed operation is obtained, and the whistle type is subsynchronous noise whistle caused by external oil film whirling in the supercharger;
If the component in the second designated order range in the vibration acceleration is greater than or equal to the preset threshold value of the order component, and the axis track accompanies the forward motion phenomenon, a simulation result for simulating noise whistle of the supercharger during variable speed operation is obtained, and the whistle type is subsynchronous noise whistle caused by internal oil film whirling in the supercharger.
7. The method of claim 6, wherein the floating bearing in the supercharger is a sliding bearing, the first specified order range is 0.1 to 0.3 order, and the second specified order range is 0.4 to 0.5 order.
8. The method of claim 6, wherein the method further comprises:
and when the simulation result shows that noise howling exists, optimizing the finite element model based on an optimization strategy corresponding to the howling type.
9. The method of claim 8, wherein the critical components include a compressor housing, a turbine housing, an intermediate, a compressor, a turbine, a rotor shaft, and a floating bearing, wherein optimizing the finite element model based on an optimization strategy corresponding to the squeal type comprises:
When the howling type is the synchronous noise howling, adjusting a sub-model structure of at least one of the rotor shaft, the impeller of the compressor and the impeller of the turbine in the finite element model;
and when the squeal type is the subsynchronous noise squeal, in the finite element model, adjusting at least one structural parameter of the width of the floating bearing, the fit clearance between the rotor shaft and the floating bearing, the fit clearance between the floating bearing and a bearing seat in the supercharger, the outer diameter of the floating bearing and an oil groove hole in the supercharger.
10. The method of claim 8, wherein the method further comprises:
acquiring a modal frequency of a shell of the supercharger based on the finite element model, and acquiring a surface vibration acceleration peak frequency of the shell of the supercharger based on the dynamics model;
and when the modal frequency is coupled with the peak frequency, performing frequency avoidance optimization on the shell of the supercharger so as to avoid the modal frequency of the shell of the supercharger from the peak frequency.
11. A supercharger noise simulation detection apparatus, characterized in that the apparatus comprises:
The first creating unit is used for creating a finite element model corresponding to the supercharger and the installation boundary through a finite element tool based on the key parts in the supercharger and the structural parameters of the installation boundary;
the second creating unit builds a dynamic model corresponding to the finite element model through a dynamic tool based on the geometric position relation, the working characteristic and the lubrication characteristic of the key parts;
the simulation unit is used for simulating the speed change operation of the supercharger in a preset working speed range through the dynamics model and extracting the vibration response of the supercharger and the axis track of a rotor shaft in the supercharger during the speed change operation;
and the detection unit is used for obtaining a simulation result for simulating whether noise and whistle exist in the supercharger during the speed change operation or not based on the vibration response and the axle center track.
12. An electronic device comprising a processor and a memory coupled to each other, the memory storing a computer program that, when executed by the processor, causes the electronic device to perform the method of any of claims 1-10.
13. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program which, when run on a computer, causes the computer to perform the method according to any of claims 1-10.
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