CN116151169B - Method and device for predicting noise intensity of reactor - Google Patents
Method and device for predicting noise intensity of reactor Download PDFInfo
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Abstract
The application provides a method and a device for predicting the noise intensity of a reactor, wherein the method comprises the steps of calculating the stem vibration energy, the upper iron yoke vibration energy and the side column vibration energy of a current reactor model according to model parameters of the current reactor model; accumulating the three energies to obtain the core vibration energy of the current reactor model, and determining the core sound power level according to the core vibration energy; calculating the body sound pressure level representing the noise intensity of the current reactor model by combining the iron core sound power level and the oil tank sound insulation quantity of the current reactor model; if the sound pressure level of the body does not meet the preset noise requirement, according to the heart column vibration energy, the upper iron yoke vibration energy and the side column vibration energy, outputting noise reduction prompt information of the current reactor model. According to the method, the body sound pressure level of the current reactor model can be estimated without numerical calculation, so that the time required for estimating whether the current reactor model meets the noise requirement is obviously shortened, and the design period of the reactor is shortened.
Description
Technical Field
The invention relates to the technical field of reactor design, in particular to a method and a device for predicting the noise intensity of a reactor.
Background
The noise of the reactor body is mainly generated by electromagnetic force among iron core cakes, in the process of designing the reactor, whether the noise intensity of a preliminarily designed reactor model in operation meets the requirement is often required to be predicted, and if the noise intensity does not meet the requirement, the structural parameters of the reactor are required to be changed to carry out iterative design. At present, a numerical simulation method is generally adopted for calculating the noise of the reactor, but the period of numerical simulation calculation is too long, so that the design period of the reactor is limited, and the reactor which finally meets the requirements cannot be designed in a short time.
Disclosure of Invention
In view of the above drawbacks of the prior art, the present invention provides a method and apparatus for predicting the noise intensity of a reactor, so as to rapidly calculate the noise of a shunt reactor, and provide corresponding noise reduction measures according to the calculation result.
A first aspect of the present application provides a method for predicting noise intensity of a reactor, including:
according to model parameters of a current reactor model, calculating core column vibration energy, upper iron yoke vibration energy and side column vibration energy of the current reactor model;
accumulating the core column vibration energy, the upper iron yoke vibration energy and the side column vibration energy to obtain core vibration energy of the current reactor model, and determining core sound power level according to the core vibration energy;
calculating a body sound pressure level representing the noise intensity of the current reactor model by combining the iron core sound power level and the oil tank sound insulation quantity of the current reactor model;
if the sound pressure level of the body does not meet the preset noise requirement, outputting noise reduction prompt information of the current reactor model according to the core column vibration energy, the upper iron yoke vibration energy and the side column vibration energy.
Optionally, the process of calculating the stem vibration energy of the current reactor model includes:
calculating to obtain the electromagnetic force between the iron core cakes according to the designed magnetic density of the current reactor model mandrel and the area of the iron core cakes;
according to the iron core cake rigidity, the air gap cushion block rigidity and the insulation cushion block rigidity of the current reactor model, calculating to obtain core column rigidity;
and calculating according to the electromagnetic force among iron core cakes, the core column rigidity, the air gap cushion block ratio, the air gap cushion block height and the number of the core columns to obtain the core column vibration energy of the current reactor model.
Optionally, the process of calculating the vibration energy of the upper yoke of the current reactor model includes:
calculating to obtain upper yoke deformation according to the elastic modulus of the upper yoke lamination material, the upper yoke length, the upper yoke section moment of inertia and the electromagnetic force between iron core cakes;
calculating to obtain an upper yoke equivalent acting force according to the upper yoke deformation and the core column rigidity;
and calculating to obtain the vibration energy of the upper iron yoke according to the equivalent acting force of the upper iron yoke, the length of the upper iron yoke, the elastic modulus of the upper iron yoke lamination material and the section moment of inertia of the upper iron yoke.
Optionally, the process of calculating the side column vibration energy of the current reactor model includes:
and calculating to obtain the side column vibration energy according to the upper iron yoke equivalent acting force, the side column rigidity, the side yoke binding mode, the area of the side yoke section and the upper iron yoke equivalent acting force.
Optionally, the outputting the noise reduction prompt information of the current reactor model according to the stem vibration energy, the upper iron yoke vibration energy and the side column vibration energy includes:
outputting first noise reduction prompt information for indicating that the stem vibration energy is too high if the stem vibration energy is larger than a preset first energy threshold;
outputting second noise reduction prompt information for indicating that the vibration energy of the upper iron yoke is too high if the vibration energy of the upper iron yoke is larger than a preset second energy threshold;
and if the vibration energy of the side column is larger than a preset third energy threshold, outputting third noise reduction prompt information for indicating that the vibration energy of the side column is too high.
A second aspect of the present application provides an apparatus for predicting a noise intensity of a reactor, including:
the first calculation unit is used for calculating the core column vibration energy, the upper iron yoke vibration energy and the side column vibration energy of the current reactor model according to the model parameters of the current reactor model;
the determining unit is used for accumulating the core column vibration energy, the upper iron yoke vibration energy and the side column vibration energy to obtain the core vibration energy of the current reactor model, and determining the core sound power level according to the core vibration energy;
a second calculation unit for calculating a body sound pressure level representing noise intensity of the current reactor model by combining the iron core sound power level and the oil tank sound insulation amount of the current reactor model;
and the output unit is used for outputting noise reduction prompt information of the current reactor model according to the heart column vibration energy, the upper iron yoke vibration energy and the side column vibration energy if the sound pressure level of the body does not meet the preset noise requirement.
Optionally, when the first calculating unit calculates the stem vibration energy of the current reactor model, the first calculating unit is specifically configured to:
calculating to obtain the electromagnetic force between the iron core cakes according to the designed magnetic density of the current reactor model mandrel and the area of the iron core cakes;
according to the iron core cake rigidity, the air gap cushion block rigidity and the insulation cushion block rigidity of the current reactor model, calculating to obtain core column rigidity;
and calculating according to the electromagnetic force among iron core cakes, the core column rigidity, the air gap cushion block ratio, the air gap cushion block height and the number of the core columns to obtain the core column vibration energy of the current reactor model.
Optionally, when the first calculating unit calculates the vibration energy of the upper iron yoke of the current reactor model, the first calculating unit is specifically configured to:
calculating to obtain upper yoke deformation according to the elastic modulus of the upper yoke lamination material, the upper yoke length, the upper yoke section moment of inertia and the electromagnetic force between iron core cakes;
calculating to obtain an upper yoke equivalent acting force according to the upper yoke deformation and the core column rigidity;
and calculating to obtain the vibration energy of the upper iron yoke according to the equivalent acting force of the upper iron yoke, the length of the upper iron yoke, the elastic modulus of the upper iron yoke lamination material and the section moment of inertia of the upper iron yoke.
Optionally, when the first calculating unit calculates the side column vibration energy of the current reactor model, the first calculating unit is specifically configured to:
and calculating to obtain the side column vibration energy according to the upper iron yoke equivalent acting force, the side column rigidity, the side yoke binding mode, the area of the side yoke section and the upper iron yoke equivalent acting force.
Optionally, the output unit outputs the noise reduction prompt information of the current reactor model according to the stem vibration energy, the upper iron yoke vibration energy and the side column vibration energy, and is specifically configured to:
outputting first noise reduction prompt information for indicating that the stem vibration energy is too high if the stem vibration energy is larger than a preset first energy threshold;
outputting second noise reduction prompt information for indicating that the vibration energy of the upper iron yoke is too high if the vibration energy of the upper iron yoke is larger than a preset second energy threshold;
and if the vibration energy of the side column is larger than a preset third energy threshold, outputting third noise reduction prompt information for indicating that the vibration energy of the side column is too high.
The application provides a method and a device for predicting the noise intensity of a reactor, wherein the method comprises the steps of calculating the stem vibration energy, the upper iron yoke vibration energy and the side column vibration energy of a current reactor model according to model parameters of the current reactor model; accumulating the three energies to obtain the core vibration energy of the current reactor model, and determining the core sound power level according to the core vibration energy; calculating the body sound pressure level representing the noise intensity of the current reactor model by combining the iron core sound power level and the oil tank sound insulation quantity of the current reactor model; if the sound pressure level of the body does not meet the preset noise requirement, according to the heart column vibration energy, the upper iron yoke vibration energy and the side column vibration energy, outputting noise reduction prompt information of the current reactor model. According to the method, the body sound pressure level of the current reactor model can be estimated without numerical calculation, so that the time required for estimating whether the current reactor model meets the noise requirement is obviously shortened, and the design period of the reactor is shortened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for predicting noise intensity of a reactor according to an embodiment of the present application;
fig. 2 is a schematic diagram of an electromagnetic force calculation result provided in an embodiment of the present application;
fig. 3 is a schematic cross-sectional view of a core structure in a reactor according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a test contour line according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a device for predicting noise intensity of a reactor according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The reactor designed in the application refers to a shunt reactor.
Referring to fig. 1, a flowchart of a method for predicting noise intensity of a reactor according to an embodiment of the present application may include the following steps.
S101, calculating the core column vibration energy, the upper iron yoke vibration energy and the side column vibration energy of the current reactor model according to the model parameters of the current reactor model.
The current reactor model in this embodiment refers to a reactor model formed after a preliminary design or a last iteration design.
In step S101, the process of calculating the stem vibration energy of the current reactor model is as follows:
firstly, calculating to obtain the inter-core-cake electromagnetic force F of the current reactor model by using the following formula (1):
F＝B 2 ×S÷(2μ 0 ) (1)。
in the formula (1), B represents the design magnetic density of the mandrel of the current reactor model; s represents the area of the iron core cake; mu (mu) 0 Vacuum magnetic permeability belongs to fixed parameters.
Referring to fig. 2, a schematic diagram of comparison of the inter-core-cake electromagnetic force F calculated according to the formula (1) and the inter-core-cake electromagnetic force F obtained by numerical simulation is shown, wherein a formula curve represents the inter-core-cake electromagnetic force F at different times calculated by the formula (1), and a simulation curve represents the inter-core-cake electromagnetic force F at different times determined by the numerical simulation, and it can be seen that the calculation result of the formula (1) is substantially identical to the result of the numerical simulation, which indicates that the inter-core-cake electromagnetic force F of the current reactor model can be accurately calculated by using the formula (1).
Then, the stem stiffness K is calculated using equation (2) core ：
K core ＝1÷(1/K 1 +1/K 2 +1/K 3 ) (2)。
In the formula (2), K 1 The rigidity of the iron core cake is represented and can be calculated according to the materials used by the iron core cake in the current reactor model and the structural parameters thereof; k (K) 2 The rigidity of the air gap cushion block is represented and can be calculated according to the materials used by the air gap cushion block in the current reactor model and the structural parameters thereof; k (K) 3 The rigidity of the insulating cushion block is represented, and the rigidity of the insulating cushion block can be calculated according to the materials used by the insulating cushion block in the current reactor model and the structural parameters of the insulating cushion block.
As can be seen from the above equation (2), the stem stiffness K core And the diameter, the cross-sectional structure and the dimension parameters of the core column of the iron core are related.
For example, the structure of the core column of the reactor can be seen in fig. 3, the structure of the reference numeral 5 in fig. 3 is a core column, the structure of the reference numeral 2 is a core cake, the structure of the reference numeral 3 is an air gap cushion, and the structure of the reference numeral 6 is an insulating cushion.
Finally, calculating by using the formula (3) to obtain the stem vibration energy C core ：
C core ＝a×K core ×(F÷K core ) m ×n( 3)。
In the formula (3), a represents the influence coefficient of the air gap cushion block ratio on vibration, the value range is 0.1 to 1.4, the air gap cushion block ratio is defined as the ratio of the area of the air gap cushion block to the area of the iron core cake in the core column, and the larger the air gap cushion block ratio is, the larger the value of the influence coefficient a is.
m is an index related to the height of the air gap cushion block, the value range is 0.5 to 2.8, and the larger the ratio of the height of the air gap cushion block to the total height of the core column is, the larger the value of the index is.
n represents the number of reactor centerposts, that is, one or more centerposts may be provided within one reactor.
From the above formulas (1) to (3), it can be seen that the process of calculating the stem vibration energy of the current reactor model can be summarized as the following steps:
calculating to obtain the electromagnetic force between the iron core cakes according to the design magnetic density of the current reactor model column and the area of the iron core cakes;
according to the iron core cake rigidity, the air gap cushion block rigidity and the insulation cushion block rigidity of the current reactor model, calculating to obtain core column rigidity;
and calculating according to the electromagnetic force among iron core cakes, the core column rigidity, the air gap cushion block ratio, the air gap cushion block height and the number of the core columns to obtain the core column vibration energy of the current reactor model.
The process of calculating the vibration energy of the upper yoke is as follows:
firstly, calculating according to the following formula (4) to obtain the deformation X of the upper iron yoke yoke ：
X yoke ＝F×L 3 ÷(48×E’×I yoke ) (4)。
In the formula (4), E' represents the elastic modulus of the upper yoke lamination material, the elastic modulus of the upper yoke lamination material is related to the silicon steel sheet elastic model and the binding mode of the upper yoke, L represents the length of the upper yoke, I yoke The upper yoke section moment of inertia is shown.
Referring to fig. 3, the structure of the reference numeral 1 is an upper yoke.
Then the equivalent acting force F of the upper iron yoke is calculated according to the following formula (5) yoke ：
F yoke ＝X yoke ×K core (5)。
Finally, the vibration energy C of the upper iron yoke is calculated according to the following formula (6) yoke ：
According to the above formulas (4) to (6), the process of calculating the vibration energy of the upper yoke can be summarized as the following steps:
calculating to obtain the deformation of the upper yoke according to the elastic modulus of the upper yoke lamination material, the length of the upper yoke, the section moment of inertia of the upper yoke and the electromagnetic force between iron core cakes;
calculating to obtain an upper yoke equivalent acting force according to the deformation of the upper yoke and the rigidity of the core column;
and calculating to obtain the vibration energy of the upper iron yoke according to the equivalent acting force of the upper iron yoke, the length of the upper iron yoke, the elastic modulus of the upper iron yoke lamination material and the section moment of inertia of the upper iron yoke.
The process of calculating the side column vibration energy is as follows:
the side column vibration energy C can be calculated by substituting the equivalent acting force of the upper iron yoke calculated when the vibration energy of the upper iron yoke is calculated into the following formula (7) limb ：
C limb ＝b×K limb ×(F yoke ÷K limb ) p (7)。
In the formula (7), b represents an influence coefficient of the side yoke binding mode on vibration, the value range is 0.1 to 1.4, and the tighter the binding is, the larger the value of the influence coefficient is; p is an index related to the cross section of the side yoke, the value range is 0.3 to 3, and the larger the cross section area of the side yoke is, the larger the value of the index is; k (K) limb Representing the side column stiffness.
The manner in which the side column vibration energy is calculated can be summarized as follows, according to equation (7):
and calculating to obtain the vibration energy of the side column according to the equivalent acting force of the upper iron yoke, the rigidity of the side column, the binding mode of the side yoke, the area of the cross section of the side yoke and the equivalent acting force of the upper iron yoke.
Referring to fig. 3, the structure of the reference numeral 4 is the side column.
It can be understood that parameters related to the structure of the current reactor model, such as the air gap pad ratio, the side yoke binding mode, the upper yoke length, etc., used in formulas (1) to (7) all belong to the model parameters in S101.
S102, accumulating the core column vibration energy, the upper iron yoke vibration energy and the side column vibration energy to obtain the core vibration energy of the current reactor model, and determining the core sound power level according to the core vibration energy.
In step S102, the core vibration energy C of the current reactor model may be calculated using the following formula (8):
C＝C core +C limb +C yoke (8)。
subsequently, the core acoustic power level of the current reactor model can be calculated from the core vibration energy C using the following formulas (9) to (11):
C noise ＝σ×C (9)；
W＝C noise ÷T(10)；
NPL＝10×log(W÷W 0 ) (11)。
in the formula (9), sigma represents the proportion of noise energy to the vibration energy of the iron core, the value range is 0.3 to 0.7, and the value can be selected from the range according to experience without limitation; c (C) noise Representing the total energy of the noise.
In formula (10), T represents the period of the noise signal, and can be generally calculated by using the common frequency f of the noise signal, i.e., t=1/f. W represents core acoustic power.
In the formula (11), NPL represents the core acoustic power level, W, of the current reactor model 0 Representing the reference acoustic power, in general, W may be set 0 Equal to 1X 10 -12 From this, it can be seen that the core acoustic power level is the ratio of the core acoustic power to the reference acoustic power multiplied by 10, with the logarithm of the base 10.
S103, calculating the body sound pressure level representing the noise intensity of the current reactor model by combining the iron core sound power level and the oil tank sound insulation quantity of the current reactor model.
After calculating the body sound pressure level, if the body sound pressure level does not meet the preset noise requirement, step S104 is executed, and if the body sound pressure level meets the noise requirement, the embodiment ends.
The noise requirement may be set according to the actual situation, and is not limited. For example, the noise requirement may be set such that the bulk sound pressure level is less than or equal to a preset sound pressure level threshold, that is, if the bulk sound pressure level calculated in S103 is greater than the sound pressure level threshold, the bulk sound pressure level is considered not to satisfy the noise requirement, and if the bulk sound pressure level calculated is less than or equal to the sound pressure level threshold, the bulk sound pressure level is considered to satisfy the noise requirement.
In step S103, the oil tank sound insulation R may be calculated according to the following formulas (12) and (13):
R＝R 0 -10×lg(0.23×R 0 ) (12)；
R 0 ＝20×lg(mf)-42.5 (13)。
in the formula (12), m is the surface density of the reactor oil tank, and f is the power frequency.
Then the body sound power level L of the current reactor model is obtained by calculation according to the following formula (14) W ：
L w ＝NPL-R (14)。
Then calculating according to formula (15) to obtain the body sound pressure level L of the reactor P ：
L P ＝L w -10lg(S÷S 0 ) (15)。
In the formula (15), S is the surface area measured on the prescribed contour line, S 0 For the base reference area, S can be generally set 0 Is 1 square meter.
Referring to fig. 4, a schematic diagram of a predetermined contour line provided in this embodiment, it can be seen that the predetermined contour line refers to a contour line that is located at a certain distance from the reactor (i.e., d of fig. 4).
In some alternative embodiments, after the body sound pressure level is obtained by calculation, the a weight body sound pressure level of the reactor may be further calculated according to the body sound pressure level, and correspondingly, when judging whether the noise requirement is met, the a weight body sound pressure level may be used as a standard to judge, that is, if the a weight body sound pressure level is less than or equal to the sound pressure level threshold, the reactor is considered to meet the noise requirement, and if the a weight body sound pressure level is greater than the sound pressure level threshold, the reactor is considered to not meet the noise requirement.
The calculation formula of the sound pressure level of the weight body is shown in the following formula (16):
L pA ＝L P -G (16)。
in the formula (16), G represents a value corresponding to the weight of a at different frequencies.
S104, outputting noise reduction prompt information of the current reactor model according to the heart column vibration energy, the upper iron yoke vibration energy and the side column vibration energy.
The noise reduction prompt information can be used for indicating which structures in the current reactor model have higher vibration energy when the current reactor model does not meet the noise requirement, so that a basis is provided for subsequent iterative design.
Specifically, S104 may include:
if the heart column vibration energy is larger than a preset first energy threshold, outputting first noise reduction prompt information for indicating that the heart column vibration energy is too high;
if the vibration energy of the upper iron yoke is larger than a preset second energy threshold, outputting second noise reduction prompt information for indicating that the vibration energy of the upper iron yoke is too high;
and if the vibration energy of the side column is larger than a preset third energy threshold, outputting third noise reduction prompt information for indicating that the vibration energy of the side column is too high.
The first energy threshold, the second energy threshold and the third energy threshold may be set according to actual situations, and the three energy thresholds may be equal or unequal.
According to the noise reduction prompt information, when the current reactor model does not meet the noise requirement and is subjected to subsequent iteration design, parameters of a specific structure can be correspondingly adjusted according to the noise reduction prompt information, and parameters of other structures are not required to be adjusted, so that time required by the iteration design is shortened.
If the output noise reduction prompt information is the first noise reduction prompt information, it may be determined that the main factor of the current reactor model that does not meet the noise requirement is that the stem vibration energy is too high, and then parameters related to the upper yoke and the side column may be kept unchanged during subsequent iteration design, and parameters related to the stem structure may be mainly adjusted, so that the stem vibration energy of the new reactor model is reduced.
If the output noise reduction prompt information comprises the first noise reduction prompt information and the second noise reduction prompt information, it can be determined that main factors of the current reactor model which do not meet the noise requirements are that the core column vibration energy and the upper iron yoke vibration energy are too high, parameters related to the side column can be kept unchanged during subsequent iteration design, and parameters of the core column structure and the upper iron yoke structure are mainly adjusted, so that the core column vibration energy and the upper iron yoke vibration energy of the new reactor model are reduced.
The application provides a method and a device for predicting the noise intensity of a reactor, wherein the method comprises the steps of calculating the stem vibration energy, the upper iron yoke vibration energy and the side column vibration energy of a current reactor model according to model parameters of the current reactor model; accumulating the three energies to obtain the core vibration energy of the current reactor model, and determining the core sound power level according to the core vibration energy; calculating the body sound pressure level representing the noise intensity of the current reactor model by combining the iron core sound power level and the oil tank sound insulation quantity of the current reactor model; if the sound pressure level of the body does not meet the preset noise requirement, according to the heart column vibration energy, the upper iron yoke vibration energy and the side column vibration energy, outputting noise reduction prompt information of the current reactor model. According to the method, the body sound pressure level of the current reactor model can be estimated without numerical calculation, so that the time required for estimating whether the current reactor model meets the noise requirement is obviously shortened, and the design period of the reactor is shortened.
According to the method for predicting the noise intensity of the reactor provided in the embodiment of the present application, the embodiment of the present application further provides a device for predicting the noise intensity of the reactor, please refer to fig. 5, which is a schematic structural diagram of the device, the device may include the following units:
a first calculating unit 501, configured to calculate stem vibration energy, upper yoke vibration energy, and side column vibration energy of a current reactor model according to model parameters of the current reactor model;
the determining unit 502 is configured to accumulate core column vibration energy, upper iron yoke vibration energy, and side column vibration energy to obtain core vibration energy of the current reactor model, and determine a core acoustic power level according to the core vibration energy;
a second calculation unit 503 for calculating a bulk sound pressure level representing a noise intensity of the current reactor model by combining the core sound power level and the tank sound insulation amount of the current reactor model;
and the output unit 504 is configured to output noise reduction prompt information of the current reactor model according to the core column vibration energy, the upper iron yoke vibration energy and the side column vibration energy if the sound pressure level of the body does not meet the preset noise requirement.
Optionally, when the first calculating unit 501 calculates the stem vibration energy of the current reactor model, the first calculating unit is specifically configured to:
calculating to obtain the electromagnetic force between the iron core cakes according to the design magnetic density of the current reactor model column and the area of the iron core cakes;
according to the iron core cake rigidity, the air gap cushion block rigidity and the insulation cushion block rigidity of the current reactor model, calculating to obtain core column rigidity;
and calculating according to the electromagnetic force among iron core cakes, the core column rigidity, the air gap cushion block ratio, the air gap cushion block height and the number of the core columns to obtain the core column vibration energy of the current reactor model.
Optionally, when the first calculating unit 501 calculates the vibration energy of the upper yoke of the current reactor model, the first calculating unit is specifically configured to:
calculating to obtain the deformation of the upper yoke according to the elastic modulus of the upper yoke lamination material, the length of the upper yoke, the section moment of inertia of the upper yoke and the electromagnetic force between iron core cakes;
calculating to obtain an upper yoke equivalent acting force according to the deformation of the upper yoke and the rigidity of the core column;
and calculating to obtain the vibration energy of the upper iron yoke according to the equivalent acting force of the upper iron yoke, the length of the upper iron yoke, the elastic modulus of the upper iron yoke lamination material and the section moment of inertia of the upper iron yoke.
Optionally, when the first calculating unit 501 calculates the side column vibration energy of the current reactor model, the calculating unit is specifically configured to:
and calculating the equivalent acting force of the upper iron yoke, the rigidity of the side column, the binding mode of the side yoke, the area of the cross section of the side yoke and the equivalent acting force of the upper iron yoke to obtain the vibration energy of the side column.
Optionally, when outputting the noise reduction prompt information of the current reactor model according to the stem vibration energy, the upper iron yoke vibration energy and the side column vibration energy by the output unit 504, the noise reduction prompt information is specifically used for:
if the heart column vibration energy is larger than a preset first energy threshold, outputting first noise reduction prompt information for indicating that the heart column vibration energy is too high;
if the vibration energy of the upper iron yoke is larger than a preset second energy threshold, outputting second noise reduction prompt information for indicating that the vibration energy of the upper iron yoke is too high;
and if the vibration energy of the side column is larger than a preset third energy threshold, outputting third noise reduction prompt information for indicating that the vibration energy of the side column is too high.
The specific working principle and the beneficial effects of the device for predicting the noise intensity of the reactor provided by the embodiment of the application can be referred to the related steps and the beneficial effects in the method for predicting the noise intensity of the reactor provided by the embodiment of the application, and are not repeated.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It should be noted that the terms "first," "second," and the like herein are merely used for distinguishing between different devices, modules, or units and not for limiting the order or interdependence of the functions performed by such devices, modules, or units.
Those skilled in the art can make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A method of predicting reactor noise strength, comprising:
according to model parameters of a current reactor model, calculating core column vibration energy, upper iron yoke vibration energy and side column vibration energy of the current reactor model;
accumulating the core column vibration energy, the upper iron yoke vibration energy and the side column vibration energy to obtain core vibration energy of the current reactor model, and determining core sound power level according to the core vibration energy;
calculating a body sound pressure level representing the noise intensity of the current reactor model by combining the iron core sound power level and the oil tank sound insulation quantity of the current reactor model;
if the sound pressure level of the body does not meet the preset noise requirement, outputting noise reduction prompt information of the current reactor model according to the core column vibration energy, the upper iron yoke vibration energy and the side column vibration energy;
the process of calculating the stem vibration energy of the current reactor model comprises the following steps:
calculating to obtain the electromagnetic force between the iron core cakes according to the designed magnetic density of the current reactor model mandrel and the area of the iron core cakes; according to the iron core cake rigidity, the air gap cushion block rigidity and the insulation cushion block rigidity of the current reactor model, calculating to obtain core column rigidity; according to the inter-core cake electromagnetic force, the core column rigidity, the air gap cushion block ratio, the air gap cushion block height and the number of core columns, calculating to obtain core column vibration energy of the current reactor model;
the process of calculating the upper yoke vibration energy of the current reactor model comprises the following steps:
calculating to obtain upper yoke deformation according to the elastic modulus of the upper yoke lamination material, the upper yoke length, the upper yoke section moment of inertia and the electromagnetic force between iron core cakes; calculating to obtain an upper yoke equivalent acting force according to the upper yoke deformation and the core column rigidity; calculating to obtain upper yoke vibration energy according to the upper yoke equivalent acting force, the upper yoke length, the elastic modulus of the upper yoke lamination material and the upper yoke section moment of inertia;
the process of calculating the side column vibration energy of the current reactor model comprises the following steps:
and calculating to obtain the side column vibration energy according to the upper iron yoke equivalent acting force, the side column rigidity, the side yoke binding mode, the area of the side yoke section and the upper iron yoke equivalent acting force.
2. The method of claim 1, wherein outputting noise reduction prompt information of the current reactor model according to the stem vibration energy, the upper yoke vibration energy, and the side-stem vibration energy comprises:
outputting first noise reduction prompt information for indicating that the stem vibration energy is too high if the stem vibration energy is larger than a preset first energy threshold;
outputting second noise reduction prompt information for indicating that the vibration energy of the upper iron yoke is too high if the vibration energy of the upper iron yoke is larger than a preset second energy threshold;
and if the vibration energy of the side column is larger than a preset third energy threshold, outputting third noise reduction prompt information for indicating that the vibration energy of the side column is too high.
3. An apparatus for predicting the noise strength of a reactor, comprising:
the first calculation unit is used for calculating the core column vibration energy, the upper iron yoke vibration energy and the side column vibration energy of the current reactor model according to the model parameters of the current reactor model;
the determining unit is used for accumulating the core column vibration energy, the upper iron yoke vibration energy and the side column vibration energy to obtain the core vibration energy of the current reactor model, and determining the core sound power level according to the core vibration energy;
a second calculation unit for calculating a body sound pressure level representing noise intensity of the current reactor model by combining the iron core sound power level and the oil tank sound insulation amount of the current reactor model;
the output unit is used for outputting noise reduction prompt information of the current reactor model according to the heart column vibration energy, the upper iron yoke vibration energy and the side column vibration energy if the sound pressure level of the body does not meet the preset noise requirement;
the first calculating unit is specifically configured to, when calculating the stem vibration energy of the current reactor model:
calculating to obtain the electromagnetic force between the iron core cakes according to the designed magnetic density of the current reactor model mandrel and the area of the iron core cakes; according to the iron core cake rigidity, the air gap cushion block rigidity and the insulation cushion block rigidity of the current reactor model, calculating to obtain core column rigidity; according to the inter-core cake electromagnetic force, the core column rigidity, the air gap cushion block ratio, the air gap cushion block height and the number of core columns, calculating to obtain core column vibration energy of the current reactor model;
the first calculating unit is specifically configured to, when calculating the vibration energy of the upper yoke of the current reactor model:
calculating to obtain upper yoke deformation according to the elastic modulus of the upper yoke lamination material, the upper yoke length, the upper yoke section moment of inertia and the electromagnetic force between iron core cakes; calculating to obtain an upper yoke equivalent acting force according to the upper yoke deformation and the core column rigidity; calculating to obtain upper yoke vibration energy according to the upper yoke equivalent acting force, the upper yoke length, the elastic modulus of the upper yoke lamination material and the upper yoke section moment of inertia;
the first calculation unit is specifically configured to, when calculating the side column vibration energy of the current reactor model:
and calculating to obtain the side column vibration energy according to the upper iron yoke equivalent acting force, the side column rigidity, the side yoke binding mode, the area of the side yoke section and the upper iron yoke equivalent acting force.
4. The device according to claim 3, wherein the output unit is configured to output noise reduction prompt information of the current reactor model according to the stem vibration energy, the upper yoke vibration energy, and the side-stem vibration energy, when:
outputting first noise reduction prompt information for indicating that the stem vibration energy is too high if the stem vibration energy is larger than a preset first energy threshold;
outputting second noise reduction prompt information for indicating that the vibration energy of the upper iron yoke is too high if the vibration energy of the upper iron yoke is larger than a preset second energy threshold;
and if the vibration energy of the side column is larger than a preset third energy threshold, outputting third noise reduction prompt information for indicating that the vibration energy of the side column is too high.
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