CN117740287A - Radiator torsional vibration and shimmy test device and test method - Google Patents
Radiator torsional vibration and shimmy test device and test method Download PDFInfo
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- CN117740287A CN117740287A CN202311624400.5A CN202311624400A CN117740287A CN 117740287 A CN117740287 A CN 117740287A CN 202311624400 A CN202311624400 A CN 202311624400A CN 117740287 A CN117740287 A CN 117740287A
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Abstract
The invention relates to a radiator torsional vibration and shimmy test device and a radiator torsional vibration and shimmy test method. The test device comprises a base, a fastening assembly, an inclination angle sensor, at least two groups of loading assemblies and a bracket; the base is used for installing and fixing the radiator and the bracket; the fastening component is used for clamping and fixing the radiator; the loading component is used for driving the radiator to generate torsional vibration and shimmy, one end of the loading component is connected with the bracket, and the other end of the loading component is connected with the fastening component; the inclination angle sensor is used for detecting the torsional vibration angle and the shimmy angle of the radiator in the test process. The testing device disclosed by the invention has good universality, is favorable for adapting to radiators with different sizes, is convenient to assemble and disassemble, can improve the efficiency of a radiator torsional vibration test, and reduces the cost.
Description
Technical Field
The invention relates to the technical field of tests, in particular to a radiator torsional vibration and shimmy test device and a radiator torsional vibration and shimmy test method.
Background
The radiator is used as an important part of a cooling system of a digging machine and other engineering machinery, the installation part of the radiator is relatively close to an engine, in the working process, the radiator is affected by vibration environment of the engine and the like in working, a certain angle of reciprocating torsion movement can be generated, and long-period reciprocating torsion movement can cause fatigue damage of a radiator structure, so that certain requirements are provided for the heat radiation performance of the radiator, and meanwhile, higher requirements are provided for the structural strength and the structural service life of the radiator.
In the production process, torsional vibration and shimmy tests are required to be carried out on the radiator so as to test the torsional vibration resistance and shimmy resistance of the radiator and avoid danger after the radiator is put into use. However, the existing test device for detecting torsional vibration and shimmy of the radiator has single structure and poor control precision and repetition precision of the angles and frequencies of the torsional vibration and shimmy, so that the radiator cannot be tested under the torsional vibration and shimmy intensities of different degrees smoothly, and the test precision is affected; and the fixed position of the radiator is not adjustable, so that the radiator is inconvenient to assemble and disassemble and cannot be widely applied to radiators with different sizes.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a radiator torsional vibration and shimmy test device and a test method, and solves the problems of low structural universality and low test precision of the test device when the radiator is subjected to torsional vibration and shimmy detection.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
in a first aspect, the invention provides a radiator torsional vibration and shimmy test device, which comprises a base, a fastening assembly, an inclination sensor, at least two groups of loading assemblies and a bracket;
the base is used for installing and fixing the radiator and the bracket;
the fastening component is used for clamping and fixing the radiator;
the loading assembly is used for driving the radiator to generate torsional vibration and shimmy, one end of the loading assembly is connected with the bracket, and the other end of the loading assembly is connected with the fastening assembly;
the inclination angle sensor is used for detecting the torsional vibration angle and the shimmy angle of the radiator in the test process.
Further, the fastening assembly comprises a bolt column, a nut and at least one pair of fastening plates, and a plurality of through holes are formed in the fastening plates; the bolt posts penetrate through holes in a pair of fastening plates and are connected with the nuts so as to clamp a radiator arranged between the pair of fastening plates.
Further, the fastening assembly also comprises a fastening caliper which comprises a caliper base, a guide post, a clamping block, a fastening bolt and a fastening hand wheel, wherein the guide post is arranged on the caliper base,
the inside of the clamping block is provided with a guide hole, and the guide hole is matched with the guide column to realize the directional movement of the clamping block;
the clamping block is provided with a bolt hole in the middle, the fastening bolt is connected with the clamping block through the bolt hole, the fastening hand wheel is installed at one end of the fastening bolt, and the movement of the clamping block is realized by rotating the fastening hand wheel.
Further, the caliper base and the clamping block are respectively arranged on two sides of the pair of fastening plates, the fastening hand wheel is rotated to compress the fastening plates and the radiator arranged in the pair of fastening plates.
Further, the loading assembly comprises a head joint bearing mounting seat, a head joint bearing, a force sensor, an actuator, a tail joint bearing and a tail joint bearing mounting seat, wherein the head joint bearing mounting seat is hinged to the fastening assembly, and the tail joint bearing mounting seat is mounted on the bracket;
the head joint bearing mounting seat is in relative rotation connection with the head joint bearing through a pin shaft; the tail joint bearing mounting seat is connected with the tail joint bearing in a relative rotation manner through a pin shaft;
the force sensor is connected with the actuator and used for collecting force signals loaded on the radiator by the actuator.
Further, the support comprises two gantry upright posts and a gantry beam connected between the two gantry upright posts, the gantry upright posts are supported on the base, and the loading assembly is connected with the gantry beam.
Further, a hanging ring is arranged at the top of the gantry upright post and used for being connected with a lifting tool; bolt holes and scales are distributed on the side face and used for adjusting the mounting height of the bracket.
Further, the upper surface of the base is vertically provided with two groups of T-shaped grooves, one T-shaped groove is connected with a T-shaped groove adapter plate, and the radiator is connected with the base through the T-shaped groove adapter plate; the support is connected with the base through another T-shaped groove.
In a second aspect, the invention provides a radiator torsional vibration and shimmy test method, the test method comprising any one or more of a radiator torsional vibration test, a radiator unilateral fixed shimmy test and a radiator three-point fixed shimmy test;
the radiator torsional vibration test comprises the following steps:
one side of the radiator is fixed on the base, and the other side of the radiator is in transmission connection with the loading assembly through the fastening assembly;
acquiring an initial excitation signal, and exciting the test device by taking the initial excitation signal as an excitation signal so that the loading assembly drives the radiator to generate torsional vibration, and acquiring the torsional vibration angle of the radiator;
when the torsion angle of the radiator exceeds a set target interval, regenerating an excitation signal to enable the torsion angle of the radiator to be always maintained in the set target interval;
calculating the deviation between the current excitation signal and the initial excitation signal, and ending the radiator torsional vibration test if the deviation exceeds a set deviation threshold;
the radiator unilateral fixed shimmy test comprises the following steps:
one side of the radiator is fixed on the base, and the other side of the radiator is in transmission connection with the loading assembly through the fastening assembly;
acquiring an initial excitation signal, using the initial excitation signal as an excitation signal to excite the test device, simultaneously applying forces with equal sizes and consistent directions by two groups of loading assemblies, wherein the phase difference of the two excitation signals is 0, so that the two groups of loading assemblies drive the radiator to generate shimmy, and acquiring shimmy angles of the radiator;
when the shimmy angle of the radiator exceeds a set target interval, regenerating an excitation signal to enable the shimmy angle of the radiator to be always maintained in the set target interval;
calculating the deviation between the current excitation signal and the initial excitation signal, and ending the radiator shimmy test if the deviation exceeds a set deviation threshold;
the radiator three-point fixed shimmy test comprises the following steps:
one side of the radiator is fixed on the base, and the other side of the radiator is in transmission connection with the loading assembly through the fastening assembly;
acquiring an initial excitation signal, and exciting the test device by taking the initial excitation signal as an excitation signal so that a group of loading assemblies drive the radiator to perform shimmy and acquire the shimmy angle of the radiator;
when the shimmy angle of the radiator exceeds a set target interval, regenerating an excitation signal to enable the shimmy angle of the radiator to be always maintained in the set target interval;
and calculating the deviation between the current excitation signal and the initial excitation signal, and ending the radiator shimmy test if the deviation exceeds a set deviation threshold value.
Further, the radiator torsional vibration test obtains an initial excitation signal, including:
applying a white noise signal to an actuator of the loading assembly to obtain an actual torsion angle of the radiator;
calculating the deviation between the actual torsion angle and the set target interval, if the deviation between the actual torsion angle and the set target interval is larger than a corresponding set deviation threshold, adjusting loading parameters of the actuator, regenerating an excitation signal until the deviation between the actual torsion angle and the set target interval is not larger than the corresponding set deviation threshold, and taking the current excitation signal as the initial excitation signal.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a radiator torsional vibration and shimmy test device which comprises a base, a fastening assembly, an inclination angle sensor, at least two groups of loading assemblies and a bracket, wherein the base is provided with a plurality of loading assemblies; the base is used for installing and fixing the radiator and the bracket; the fastening component is used for clamping and fixing the radiator; the loading assembly is used for driving the radiator to generate torsional vibration and shimmy, one end of the loading assembly is connected with the bracket, and the other end of the loading assembly is connected with the fastening assembly; the inclination angle sensor is used for detecting the torsional vibration angle and the shimmy angle of the radiator in the test process. The device has simple structure, convenient disassembly and assembly and good universality, and is suitable for radiators with various sizes;
2. the radiator torsional vibration and shimmy test method provided by the invention comprises any one or more combinations of a radiator torsional vibration test, a radiator unilateral fixed shimmy test and a radiator three-point fixed shimmy test, and by utilizing the radiator torsional vibration and shimmy test device provided by the invention, the torsion angle and the frequency can be accurately controlled through closed loop control, accurate repeated tests can be carried out, and the radiator torsional vibration and shimmy test precision is improved.
Drawings
FIG. 1 is a schematic diagram of a device for testing torsional vibration and shimmy of a radiator according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a fastening assembly of a radiator torsional vibration and shimmy test device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a fastening caliper of a radiator torsional vibration and shimmy test device according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a loading assembly of a radiator torsional vibration and shimmy test device according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a support of a radiator torsional vibration and shimmy test device according to an embodiment of the present invention;
FIG. 6 is a schematic flow chart of a method for testing torsional vibration of a radiator according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a flow chart for obtaining an excitation signal in a radiator torsional vibration test method according to an embodiment of the present invention;
in the figure: 01-base, 02-T type groove keysets, 03-radiator, 04-fastening component, 4-1-bolt post, 4-2-nut, 4-3-fastening board, 05-fastening callipers, 5-1-calliper base, 5-2-guide post, 5-3-clamping block, 5-4-fastening bolt, 5-5-fastening hand wheel, 06-inclination sensor, 07-loading component, 7-1-head joint bearing mount, 7-2-force sensor, 7-3-actuator, 7-4-head joint bearing, 7-5-tail joint bearing, 7-6-tail joint bearing mount, 08-bracket, 8-1-gantry column, 8-2-lifting ring, 8-3-gantry beam.
Detailed Description
The following detailed description of the technical solutions of the present invention is made by the accompanying drawings and specific embodiments, and it should be understood that the specific features of the embodiments and embodiments of the present application are detailed descriptions of the technical solutions of the present application, and not limiting the technical solutions of the present application, and the technical features of the embodiments and embodiments of the present application may be combined with each other without conflict.
The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
Embodiment one:
as shown in fig. 1, the embodiment of the invention provides a radiator torsional vibration and shimmy test device, which comprises a base 01, a T-shaped groove adapter plate 02, a fastening component 04, an inclination sensor 06, a bracket 08 and at least two groups of loading components 07. Specifically, the base 01 is used for installing and fixing the radiator 03 and the bracket 08; the fastening component 04 is used for clamping and fixing the radiator 03; the loading assembly 07 is used for driving the radiator 03 to generate torsional vibration and shimmy, one end of the loading assembly 07 is connected with the bracket 08, and the other end is connected with the fastening assembly 04; the inclination sensor 06 is used for detecting the torsional vibration angle and the shimmy angle of the radiator 03 in the test process.
The torsional vibration and shimmy test device of the radiator further comprises two groups of T-shaped grooves vertically distributed on the upper surface of the base 01, wherein one T-shaped groove is connected with a T-shaped groove adapter plate 02, the radiator 03 is connected with the base 01 through the T-shaped groove adapter plate 02, and the bracket 08 is connected with the base 01 through the other T-shaped groove.
As shown in fig. 2, in the embodiment of the present invention, the fastening assembly 04 includes a bolt post 4-1, a nut 4-2, and at least one pair of fastening plates 4-3, and the fastening plates 4-3 are provided with a plurality of through holes; the stud 4-1 is connected to the nut 4-2 through a through hole formed in the pair of fastening plates 4-3 for clamping the heat sink 03 placed between the pair of fastening plates 4-3. In addition, as shown in fig. 3, in the embodiment of the present invention, the fastening assembly 04 further includes a fastening caliper 05, the fastening caliper 05 includes a caliper base 5-1, a guide post 5-2, a clamping block 5-3, a fastening bolt 5-4, and a fastening hand wheel 5-5, the guide post 5-2 is mounted on the caliper base 5-1, a guide hole is provided inside the clamping block 5-3, and the guide hole cooperates with the guide post 5-2 to realize the directional movement of the clamping block 5-3; the middle of the clamping block 5-3 is provided with a bolt hole, the fastening bolt 5-4 is connected with the clamping block 5-3 through the bolt hole, the fastening hand wheel 5-5 is arranged at one end of the fastening bolt 5-4, and the movement of the clamping block 5-3 is realized by rotating the fastening hand wheel 5-5. The caliper base 5-1 and the clamping block 5-3 are respectively arranged at two sides of the pair of fastening plates 4-3, the fastening hand wheel 5-5 is rotated to compress the fastening plates 4-3 and the radiator 03 arranged in the pair of fastening plates 4-3.
As shown in fig. 4, the loading assembly 07 includes a head joint bearing mount 7-1, a head joint bearing 7-4, a force sensor 7-2, an actuator 7-3, a tail joint bearing 7-5, and a tail joint bearing mount 7-6, the head joint bearing mount 7-1 being hinged to the fastening assembly 04, the tail joint bearing mount 7-6 being mounted to the bracket; the head joint bearing mounting seat 7-1 is connected with the head joint bearing 7-4 in a relative rotation manner through a pin shaft; the tail joint bearing mounting seat 7-6 is connected with the tail joint bearing 7-5 in a relative rotation manner through a pin shaft; the force sensor 7-2 is connected to the actuator 7-3 for acquiring a force signal applied by the actuator 7-3 to the heat sink 03.
As shown in fig. 5, the bracket 08 includes two gantry posts 8-1 and a gantry beam 8-3 connected between the two gantry posts 8-1, the gantry posts being supported on a base, and the loading assembly being connected to the gantry beam 8-3. The top of the gantry column 8-1 is provided with a hanging ring 8-2 which is used for connecting a lifting tool, and the lifting tool such as a crane can be used for lifting, so that the installation and the movement are convenient; the side evenly distributed has the bolt hole, realizes the installation of support different height through the oblong hole cooperation with longmen crossbeam 8-3 both sides, and is equipped with the scale from the bottom upwards at longmen stand 8-1 side, conveniently observes the height of longmen crossbeam 8-3, and conveniently realizes the unanimity of longmen crossbeam 8-3 both sides height.
Embodiment two:
as shown in fig. 6, the embodiment of the invention provides a radiator torsional vibration test method, which can be implemented based on the test device according to the first embodiment, and the specific test includes the following steps:
s11, one side of a radiator 03 is fixed on a base 01, and the other side of the radiator 03 is in transmission connection with a loading assembly 07 through a fastening assembly 04;
s12, acquiring an initial excitation signal, and taking the initial excitation signal as an excitation signal;
s13, exciting the test device by using an excitation signal to enable the two groups of loading assemblies 07 to drive the radiator 03 to generate torsional vibration, and collecting response signals of the inclination sensor 06 to obtain the torsional vibration angle of the radiator 03;
s14, calculating the deviation between the response signal and the set target signal, if the deviation between the response signal and the set target signal is larger than a corresponding set deviation threshold value, adjusting the loading parameters of the actuator 7-3, regenerating an excitation signal, and turning to S13, otherwise turning to S15;
s15, calculating the deviation between the current excitation signal and the initial excitation signal, if the deviation between the current excitation signal and the initial excitation signal is not larger than a set deviation threshold value, turning to S13, otherwise turning to S16;
and S16, stopping the test, and recognizing the fatigue failure of the radiator 03.
As shown in fig. 7, the method for acquiring the initial excitation signal in step S12 may be implemented based on the test apparatus according to the first embodiment, and the specific method includes the following steps:
s121, one side of a radiator 03 is fixed on a base 01, and the other side is in transmission connection with a loading assembly 07 through a fastening assembly 04;
s122, white noise signals are applied to the actuators 7-3 of the two groups of loading assemblies 07, initial excitation signals are generated, and the initial excitation signals are used as excitation signals;
s123, exciting the test device by using an excitation signal so that the two groups of loading assemblies 07 drive the radiator 03 to generate torsional vibration and collect response signals of the inclination sensor 06;
s124, calculating the deviation between the response signal and the set target signal, if the deviation between the response signal and the set target signal is larger than the corresponding set deviation threshold, adjusting the loading parameters of the actuator 7-3, regenerating an excitation signal, and turning to S123, otherwise turning to S125;
s125, taking the current excitation signal as an initial excitation signal.
Embodiment III:
the embodiment of the invention provides a radiator unilateral fixed shimmy test method, which can be realized based on the test device of the embodiment I, and the specific test comprises the following steps:
s21, one side of the radiator 03 is fixed on the base 01, and the other side is in transmission connection with the loading assembly 07 through the fastening assembly 04;
s22, acquiring an initial excitation signal, and taking the initial excitation signal as an excitation signal;
s23, exciting the test device by using excitation signals, simultaneously applying forces with equal magnitudes and consistent directions to the two groups of loading assemblies 07, and ensuring that the phase difference of the excitation signals of the actuators 7-3 applied to the two groups of loading assemblies 07 is 0 so as to enable the two groups of loading assemblies 07 to drive the radiator 03 to perform shimmy, and collecting response signals of the inclination sensor 06 to obtain a shimmy angle of the radiator 03;
s24, calculating the deviation between the response signal and the set target signal, if the deviation between the response signal and the set target signal is larger than a corresponding set deviation threshold value, adjusting the loading parameters of the actuator 7-3, regenerating an excitation signal, and turning to S23, otherwise turning to S25;
s25, calculating the deviation between the current excitation signal and the initial excitation signal, if the deviation between the current excitation signal and the initial excitation signal is not larger than the set deviation threshold value, turning to S23, otherwise turning to S26;
and S26, stopping the test, and recognizing the fatigue failure of the radiator 03.
The method for acquiring the initial excitation signal in step S22 may be implemented based on the test apparatus according to the first embodiment, and the specific method includes the following steps:
s221, one side of the radiator 03 is fixed on the base 01, and the other side is in transmission connection with the loading assembly 07 through the fastening assembly 04;
s222, applying white noise signals to actuators 7-3 of the two groups of loading assemblies 07 to generate initial excitation signals, and taking the initial excitation signals as excitation signals;
s223, exciting the test device by using excitation signals, simultaneously applying forces with equal magnitudes and consistent directions to the two groups of loading assemblies 07, and ensuring that the phase difference of the excitation signals of the actuators 7-3 applied to the two groups of loading assemblies 07 is 0 so as to enable the two groups of loading assemblies 07 to drive the radiator 03 to perform shimmy, and collecting response signals of the inclination sensor 06 to obtain a shimmy angle of the radiator 03;
s224, calculating the deviation between the response signal and the set target signal, if the deviation between the response signal and the set target signal is larger than the corresponding set deviation threshold, adjusting the loading parameters of the actuator 7-3, regenerating an excitation signal, and turning to S223, otherwise turning to S225;
s225, taking the current excitation signal as an initial excitation signal.
Embodiment four:
the embodiment of the invention provides a radiator three-point fixed shimmy test method, which can be realized based on the test device in the first embodiment and based on the test method in the third embodiment, and is different from the third embodiment in that when the radiator three-point fixed shimmy test and corresponding initial excitation signal acquisition are performed, one group of two groups of loading assemblies 07 is kept fixed, and the other group of loading assemblies drives the radiator 03 to perform shimmy.
The foregoing is merely a preferred embodiment of the present disclosure/application, and it should be noted that, for a person skilled in the art, several improvements and modifications can be made without departing from the technical principles of the disclosure/application, and these improvements and modifications should also be considered as the protection scope of the disclosure/application.
Claims (10)
1. The radiator torsional vibration and shimmy test device is characterized by comprising a base (01), a fastening assembly (04), an inclination angle sensor (06), at least two groups of loading assemblies (07) and a bracket (08);
the base (01) is used for installing and fixing the radiator and the bracket (08);
the fastening component (04) is used for clamping and fixing the radiator;
the loading assembly (07) is used for driving the radiator to generate torsional vibration and shimmy, one end of the loading assembly (07) is connected with the bracket (08), and the other end of the loading assembly is connected with the fastening assembly (04);
the inclination angle sensor (06) is used for detecting the torsional vibration angle and the shimmy angle of the radiator in the test process.
2. The radiator torsional vibration and shimmy test device according to claim 1, wherein the fastening assembly (04) comprises a bolt column (4-1), a nut (4-2) and at least one pair of fastening plates (4-3), and a plurality of through holes are formed in the fastening plates (4-3); the bolt posts (4-1) are connected with the nuts (4-2) through holes on a pair of fastening plates (4-3) to clamp a heat sink interposed between the pair of fastening plates (4-3).
3. The radiator torsional vibration and shimmy test device according to claim 1 or 2, wherein the fastening assembly (04) further comprises a fastening caliper (05), the fastening caliper (05) comprises a caliper base (5-1), a guide post (5-2), a clamping block (5-3), a fastening bolt (5-4) and a fastening hand wheel (5-5), the guide post (5-2) is mounted on the caliper base (5-1),
a guide hole is formed in the clamping block (5-3), and the clamping block (5-3) is directionally moved by being matched with the guide column (5-2) through the guide hole;
the clamping device is characterized in that a bolt hole is formed in the middle of the clamping block (5-3), the fastening bolt (5-4) is connected with the clamping block (5-3) through the bolt hole, the fastening hand wheel (5-5) is installed at one end of the fastening bolt (5-4), and the movement of the clamping block (5-3) is achieved by rotating the fastening hand wheel (5-5).
4. A radiator torsional and shimmy test device according to claim 3, characterized in that the caliper base (5-1) and the clamping blocks (5-3) are placed on both sides of the pair of fastening plates (4-3), respectively, and the fastening hand wheel (5-5) is rotated to compress the fastening plates (4-3) and the radiator placed in the pair of fastening plates (4-3).
5. The radiator torsional and shimmy test device according to claim 1, wherein the loading assembly (07) comprises a head joint bearing mount (7-1), a head joint bearing (7-4), a force sensor (7-2), an actuator (7-3), a tail joint bearing (7-5) and a tail joint bearing mount (7-6), the head joint bearing mount (7-1) being hinged to the fastening assembly (04), the tail joint bearing mount (7-6) being mounted on the bracket;
the head joint bearing mounting seat (7-1) is connected with the head joint bearing (7-4) in a relative rotation manner through a pin shaft; the tail joint bearing mounting seat (7-6) is connected with the tail joint bearing (7-5) in a relative rotation manner through a pin shaft;
the force sensor (7-2) is connected with the actuator (7-3) and is used for collecting a force signal loaded on the radiator by the actuator (7-3).
6. The radiator torsional vibration and shimmy test device according to claim 1, wherein the bracket (08) comprises two gantry uprights (8-1) and a gantry cross beam (8-3) connected between the two gantry uprights (8-1), the gantry uprights (8-1) are supported on the base (01), and the loading assembly (07) is connected with the gantry cross beam (8-3).
7. The radiator torsional vibration and shimmy test device according to claim 6, wherein the top of the gantry column (8-1) is provided with a hanging ring (8-2) for connecting a hoisting tool; bolt holes and scales are distributed on the side face and are used for adjusting the installation height of the bracket (08).
8. The radiator torsional vibration and shimmy test device according to claim 1, wherein the upper surface of the base (01) is vertically provided with two groups of T-shaped grooves, one T-shaped groove is connected with a T-shaped groove adapter plate, and the radiator is connected with the base (01) through the T-shaped groove adapter plate; the bracket (08) is connected with the base (01) through another T-shaped groove.
9. A method of testing a radiator torsional and shimmy test device as defined in any one of claims 1 to 8, comprising any one or more of a radiator torsional test, a radiator one-sided fixed shimmy test, and a radiator three-point fixed shimmy test;
the radiator torsional vibration test comprises the following steps:
one side of the radiator is fixed on the base (01), and the other side of the radiator is in transmission connection with the loading component (07) through the fastening component (04);
acquiring an initial excitation signal, and exciting the test device by taking the initial excitation signal as an excitation signal so as to enable the loading assembly (07) to drive the radiator to generate torsional vibration and acquire the torsional vibration angle of the radiator;
when the torsion angle of the radiator exceeds a set target interval, regenerating an excitation signal to enable the torsion angle of the radiator to be always maintained in the set target interval;
calculating the deviation between the current excitation signal and the initial excitation signal, and ending the radiator torsional vibration test if the deviation exceeds a set deviation threshold;
the radiator unilateral fixed shimmy test comprises the following steps:
one side of the radiator is fixed on the base (01), and the other side of the radiator is in transmission connection with the loading component (07) through the fastening component (04);
acquiring an initial excitation signal, using the initial excitation signal as an excitation signal to excite the test device, simultaneously applying forces with equal magnitude and consistent direction by two groups of loading assemblies (07), wherein the phase difference of the two excitation signals is 0, so that the two groups of loading assemblies (07) drive the radiator to perform shimmy, and acquiring the shimmy angle of the radiator;
when the shimmy angle of the radiator exceeds a set target interval, regenerating an excitation signal to enable the shimmy angle of the radiator to be always maintained in the set target interval;
calculating the deviation between the current excitation signal and the initial excitation signal, and ending the radiator shimmy test if the deviation exceeds a set deviation threshold;
the radiator three-point fixed shimmy test comprises the following steps:
one side of the radiator is fixed on the base (01), and the other side of the radiator is in transmission connection with the loading component (07) through the fastening component (04);
acquiring an initial excitation signal, and exciting the test device by taking the initial excitation signal as an excitation signal so as to enable a group of loading assemblies (07) to drive the radiator to perform shimmy and acquire the shimmy angle of the radiator;
when the shimmy angle of the radiator exceeds a set target interval, regenerating an excitation signal to enable the shimmy angle of the radiator to be always maintained in the set target interval;
and calculating the deviation between the current excitation signal and the initial excitation signal, and ending the radiator shimmy test if the deviation exceeds a set deviation threshold value.
10. The method of testing of claim 9, wherein the radiator torsional vibration test obtains an initial excitation signal comprising:
applying a white noise signal to an actuator (7-3) of the loading assembly (07) to obtain an actual torsion angle of the radiator;
calculating the deviation between the actual torsion angle and the set target interval, if the deviation between the actual torsion angle and the set target interval is larger than a corresponding set deviation threshold, adjusting the loading parameter of the actuator (7-3), and regenerating an excitation signal until the deviation between the actual torsion angle and the set target interval is not larger than the corresponding set deviation threshold, and taking the current excitation signal as the initial excitation signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311624400.5A CN117740287A (en) | 2023-11-30 | 2023-11-30 | Radiator torsional vibration and shimmy test device and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311624400.5A CN117740287A (en) | 2023-11-30 | 2023-11-30 | Radiator torsional vibration and shimmy test device and test method |
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| Publication Number | Publication Date |
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| CN117740287A true CN117740287A (en) | 2024-03-22 |
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| CN202311624400.5A Pending CN117740287A (en) | 2023-11-30 | 2023-11-30 | Radiator torsional vibration and shimmy test device and test method |
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| Country | Link |
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| CN (1) | CN117740287A (en) |
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