CN114526854A - Method and device for controlling stress of water delivery steel pipe and storage medium - Google Patents
Method and device for controlling stress of water delivery steel pipe and storage medium Download PDFInfo
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Abstract
The invention discloses a control method, a control device and a storage medium for stress of a water delivery steel pipe, wherein a high-stress node is determined by monitoring the stress condition of each part of the water delivery steel pipe; adjusting the stress of the high-stress node by adopting a high-energy sound beam control method; therefore, the stress of the water delivery steel pipe can be effectively controlled, and the advanced failure of the water delivery steel pipe structure is avoided.
Description
Technical Field
The invention belongs to the technical field of pipeline stress treatment, and particularly relates to a method and a device for controlling the stress of a water delivery steel pipe and a storage medium.
Background
The pipeline structure is widely applied to the engineering fields of water supply and drainage pipelines and the like. In the welding manufacturing process, the generated residual stress can influence the plasticity and the toughness of a welding joint, reduce the bearing capacity, the fatigue strength, the brittle failure resistance and the stress corrosion cracking resistance of a pipeline, and even lead the pipeline structure to fail in advance. In addition, most parts are welded and assembled on site after being processed and prefabricated by a manufacturer, the site working environment is hard and severe, various external factors easily cause adverse effects on the welding and assembly of the steel structure, the pipeline system needs to bear the load of the self-working environment and also needs to bear additional loads generated by severe natural environments such as earthquake, landslide, rainstorm, debris flow, flood, mountain stones and the like, and the stress concentration part of the pipeline system is often in a dangerous state due to the high stress concentration degree of the welding area and the sudden load action of the natural environment.
Therefore, how to realize the stress control of the water-conveying steel pipe becomes a problem to be solved urgently in the industry at present.
Disclosure of Invention
The embodiment of the invention aims to provide a method and a device for controlling the stress of a water delivery steel pipe and a storage medium, and aims to solve the problem that the stress of the water delivery steel pipe cannot be controlled in the prior art.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for controlling stress of a water pipe, where the method includes:
monitoring the stress condition of each part of the water delivery steel pipe, and determining a high-stress node;
and adjusting the stress of the high-stress node by adopting a high-energy sound beam control method.
Optionally, according to an embodiment of the present invention, the method for controlling stress of a water pipe, where the monitoring of the stress condition of each part of the water pipe and the determining of a high-stress node include:
determining the stress value of each part of the water delivery steel pipe based on an ultrasonic nondestructive testing probe;
and comparing the stress value of each part with a preset threshold value to determine a high-stress node.
Optionally, according to an embodiment of the present invention, the determining the stress value of each part of the water delivery steel pipe based on the ultrasonic nondestructive testing probe includes:
determining a tangential residual stress value of a part to be detected by adopting a critical refraction longitudinal wave detection method;
and determining the normal residual stress value of the part to be detected by adopting a body wave detection method.
Optionally, according to the method for controlling stress of a water pipe according to an embodiment of the present invention, determining a tangential residual stress value of a to-be-detected portion by using a critical refraction longitudinal wave detection method includes:
determining a first transmission time of a critical refraction longitudinal wave propagating along the surface layer of the part to be detected;
determining a tangential residual stress value of the part to be detected based on the first transmission time and a first reference transmission time;
wherein the first reference transmission time is the transmission time of the critical refraction longitudinal wave which is measured and transmitted along the surface layer of the part to be detected under the condition of known stress.
Optionally, according to the method for controlling stress of a water pipe according to an embodiment of the present invention, the determining a normal residual stress value of the to-be-detected portion by using a body wave detection method includes:
determining a second transmission time of the longitudinal wave with the propagation direction along the stress direction and a third transmission time of the shear wave with the propagation direction along the stress direction and the polarization direction perpendicular to the stress direction;
determining a normal residual stress value of the part to be detected based on the second transmission time, the third transmission time and corresponding second reference transmission time and third reference transmission time;
wherein the second reference propagation time is the propagation time of the longitudinal wave with the propagation direction along the stress direction measured under the condition of known stress; the third reference transit time is the transit time of a shear wave with a measured propagation direction along the stress direction and a polarization direction perpendicular to the stress direction, under a known stress.
Optionally, according to the method for controlling stress of a water pipe according to an embodiment of the present invention, the adjusting the stress of the high stress node by using a high energy sound beam control method includes:
adjusting the stress of the high-stress node based on a theoretical model for regulating and controlling the residual stress by high-energy ultrasound; wherein, the expression of the regulation theoretical model is as follows:
wherein E is the energy obtained by the high-power ultrasonic source provided by the high-energy ultrasonic and the mass element with the distance of x, and the volume of the mass element is V0Initial sound pressure of P0Density is rho0The sound velocity of ultrasonic wave is C, the amplitude of sound pressure is A, C is a constant, F is the ultrasonic frequency, F is an anisotropy factor, d is the diameter of a mass element crystal grain, K is a heat conduction coefficient, C isvIs constant specific heat capacity, cρAnd u is the constant pressure specific heat, the mass element vibration rate and t is the time.
Optionally, according to an embodiment of the method for controlling stress of a water pipe, the ultrasonic nondestructive testing probe is disposed in a main stress direction of the water pipe.
In a second aspect, an embodiment of the present invention provides a device for controlling stress of a water delivery steel pipe, where the device includes:
the high stress node determining module is used for monitoring the stress condition of each part of the water delivery steel pipe and determining a high stress node;
and the stress control module is used for adjusting the stress of the high-stress node by adopting a high-energy sound beam control method.
In a third aspect, an embodiment of the present invention provides an electronic device, which includes a processor, a memory, and a program or instructions stored on the memory and executable on the processor, where the program or instructions, when executed by the processor, implement the steps of the method for controlling stress of a water pipe according to the first aspect.
In a fourth aspect, an embodiment of the present invention provides a readable storage medium, on which a program or instructions are stored, where the program or instructions, when executed by a processor, implement the steps of the method for controlling stress of a water-conveying steel pipe according to the first aspect.
The method, the device and the storage medium for controlling the stress of the water delivery steel pipe provided by the embodiment of the invention monitor the stress condition of each part of the water delivery steel pipe, determine the high-stress node, and adjust the stress of the high-stress node by adopting a high-energy sound beam control method, so that the stress of the water delivery steel pipe can be effectively controlled, and the early failure of the structure of the water delivery steel pipe is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for controlling stress of a water-conveying steel pipe according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the generation principle of critical refraction longitudinal wave according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating propagation directions of a critical refraction longitudinal wave according to an embodiment of the present invention;
FIG. 4 is a schematic view of an arrangement direction of an ultrasonic nondestructive testing probe provided by an embodiment of the invention;
FIG. 5 is a second schematic view illustrating an arrangement direction of the ultrasonic nondestructive testing probe according to the embodiment of the invention;
FIG. 6 is a third schematic view illustrating an arrangement direction of the ultrasonic nondestructive testing probe according to the embodiment of the invention;
FIG. 7 is a fourth schematic view illustrating an arrangement direction of the ultrasonic nondestructive testing probe according to the embodiment of the invention;
FIG. 8 is a fifth schematic view illustrating an installation direction of the nondestructive ultrasonic testing probe according to the embodiment of the present invention;
FIG. 9 is a sixth schematic view illustrating an arrangement direction of the ultrasonic nondestructive testing probe according to the embodiment of the invention;
FIG. 10 is a block diagram of a control device for stress of a water pipe according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms first, second and the like in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that embodiments of the invention may be practiced otherwise than as specifically illustrated and described herein.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The following describes in detail a method, an apparatus, and a storage medium for controlling stress of a water pipe according to embodiments of the present invention with reference to the accompanying drawings.
Example 1
Fig. 1 is a schematic flow chart of a method for controlling stress of a water-conveying steel pipe according to an embodiment of the present invention. As shown in fig. 1, the method includes:
and 101, monitoring the stress condition of each part of the water delivery steel pipe, and determining a high-stress node.
Specifically, stress conditions of all parts of the water delivery steel pipe are monitored in real time, the stress conditions mainly refer to residual stress conditions, and correspondingly, all the parts of the water delivery steel pipe comprise a steel structure welding heat affected zone and bolts. The high stress nodes are generally those locations having greater tensile residual stress, such as tensile residual stress values greater than or equal to 1/4-1/3 of the material yield strength at the high stress nodes. It can be understood that the stress reference threshold of the high-stress node may be adjusted according to actual conditions, and the value of the stress reference threshold is not specifically limited in the embodiment of the present invention.
And step 102, adjusting the stress of the high-stress node by adopting a high-energy sound beam control method.
Specifically, when a high-stress node is detected, the stress of the high-stress node is adjusted based on a high-energy sound beam control method, so that the stress condition of the water delivery steel pipe is ensured to be in a normal level, and the early failure of the structure of the water delivery steel pipe is avoided.
According to the control method for the stress of the water delivery steel pipe, provided by the embodiment of the invention, the stress condition of each part of the water delivery steel pipe is monitored, the high-stress node is determined, the stress of the high-stress node is adjusted by adopting a high-energy sound beam control method, the stress of the water delivery steel pipe can be effectively controlled, and the early failure of the structure of the water delivery steel pipe is avoided.
Example 2
Based on the above embodiment, the monitoring of the stress condition of each part of the water delivery steel pipe and the determination of the high-stress node include:
determining the stress value of each part of the water delivery steel pipe based on an ultrasonic nondestructive testing probe;
and comparing the stress value of each part with a preset threshold value to determine a high-stress node.
Specifically, stress values of all parts of the water delivery steel pipe are measured in a mode that an ultrasonic nondestructive testing probe sends ultrasonic waves to the part to be tested. And comparing the stress value of each part with a preset threshold value to determine a high-stress node.
According to the control method for the stress of the water delivery steel pipe, provided by the embodiment of the invention, the stress values of all parts of the water delivery steel pipe are determined based on the ultrasonic nondestructive testing probe, and the stress values of all parts are compared with the preset threshold value to determine the high-stress node, so that the high-stress node can be accurately determined, and the timeliness and the accuracy of subsequent stress control are ensured.
Example 3
Based on the above embodiment, the determining the stress value of each part of the water delivery steel pipe based on the ultrasonic nondestructive testing probe includes:
determining a tangential residual stress value of a part to be detected by adopting a critical refraction longitudinal wave detection method;
and determining the normal residual stress value of the part to be detected by adopting a body wave detection method.
Specifically, the ultrasonic waves propagating through the workpiece are of various types, and are classified into: transverse, longitudinal, guided, surface, etc. It has been found through research that longitudinal waves (i.e., critically refracted longitudinal waves, Lcr waves) propagating along the surface layer are most sensitive to stress in the direction of propagation. Therefore, the embodiment of the invention adopts a critical refraction longitudinal wave method to detect the tangential residual stress value of the part to be detected.
According to Snell's law, there is an angle of incidence such that the angle of refraction of a refracted longitudinal wave is equal to 90 °, this angle being called the first critical angle, which is calculated as follows:
θcr＝sin-1(V0/Vl)；
wherein, V0、VlIs the speed of ultrasonic longitudinal wave in two media, thetacrIs the first critical angle at which the ultrasonic longitudinal wave propagates in both media,as shown in fig. 2, which is a schematic diagram of a generation principle of a critical refraction longitudinal wave provided by an embodiment of the present invention, an Lcr wave propagates along a surface layer of a sample, and has a fast propagation speed, small attenuation, and relatively simple signal analysis and positioning. As shown in fig. 3, which is a schematic view of a propagation direction of a critical refraction longitudinal wave provided by an embodiment of the present invention, when a direction of a residual stress is consistent with a direction of the longitudinal wave and a distance between ultrasonic transducers is fixed, a tensile stress slows down an ultrasonic propagation speed and prolongs a propagation time; the pressure stress accelerates the ultrasonic propagation speed and shortens the propagation time; therefore, if the ultrasonic propagation time when the stress in the part to be detected is 0 and the ultrasonic propagation time when the stress in the part to be detected is sigma are measured, the tangential residual stress value sigma of the part to be detected can be calculated according to the time difference between the ultrasonic propagation time and a corresponding formula.
When an isotropic solid material is subjected to a stress direction, the relationship between the speed of sound of an elastic wave (longitudinal and shear waves) propagating in the material and the magnitude of the stress can be derived as follows:
(1) longitudinal acoustic velocity propagating along the stress direction versus stress:
(2) shear wave (i.e., transverse wave) acoustic velocity with a direction of propagation along the stress direction and a direction of polarization perpendicular to the stress direction, as a function of stress:
where ρ is0Is the density of the material, V11、V12Respectively longitudinal wave sound velocity and transverse wave sound velocity, lambda and mu are second-order Lame elastic constants, l, m and n are third-order Memmer elastic constants, K0Is the elastic wave stress coefficient, σ11Is the principal stress.
Because the change of the axial dimension of the bolt influences the propagation time of the ultrasonic waves, the detection error is greatly increased, and therefore the influence factor can be eliminated only by combining the ultrasonic transverse waves with the longitudinal waves. If the body wave propagation time corresponding to the zero stress and the body wave propagation time corresponding to the measured stress are known, the normal residual stress value of the part to be detected can be calculated according to the time difference and a corresponding formula.
According to the method for controlling the stress of the water delivery steel pipe, provided by the embodiment of the invention, the tangential residual stress value of the part to be detected is determined by adopting a critical refraction longitudinal wave detection method, the normal residual stress value of the part to be detected is determined by adopting a body wave detection method, the stress value of each part of the water delivery steel pipe can be accurately determined, and the timeliness and the accuracy of subsequent stress control are ensured.
Example 4
Based on the above embodiment, the determining the tangential residual stress value of the to-be-detected portion by using the critical refracted longitudinal wave detection method includes:
determining a first transmission time of a critical refraction longitudinal wave propagating along the surface layer of the part to be detected;
determining a tangential residual stress value of the part to be detected based on the first transmission time and a first reference transmission time;
wherein the first reference transmission time is the transmission time of the critical refraction longitudinal wave which is measured and transmitted along the surface layer of the part to be detected under the condition of known stress.
Specifically, according to the foregoing embodiment, if the ultrasonic propagation time (i.e., the first reference transmission time) when the stress in the portion to be detected is 0 and the ultrasonic propagation time (i.e., the first transmission time) when the stress in the portion to be detected is σ are measured, the tangential residual stress value σ of the portion to be detected can be calculated according to the time difference between the two and the corresponding formula. It is understood that the first reference transit time may be the measured transit time of the critical refracted longitudinal wave propagating along the surface layer of the to-be-detected portion under any known stress, and is not limited to the case where the stress is 0.
The calculation formula specifically includes:
σ＝σ0+K(T-T0)；
wherein σ0For said known stress, T0Is a first groupThe quasi-transmission time, T is the first transmission time, K is the stress coefficient, the value is determined by the type and the characteristic of the material of the part to be detected, and the quasi-transmission time can be obtained by experimental calibration. A negative value of σ indicates compressive stress and a positive value indicates tensile stress.
The method for controlling the stress of the water delivery steel pipe, provided by the embodiment of the invention, comprises the steps of determining the first transmission time of the critical refraction longitudinal wave propagating along the surface layer of the part to be detected, and determining the tangential residual stress value of the part to be detected based on the first transmission time and the first reference transmission time, wherein the first reference transmission time is the transmission time of the critical refraction longitudinal wave propagating along the surface layer of the part to be detected under the condition of known stress, so that the tangential residual stress value of the part to be detected can be accurately and efficiently determined, and the accuracy and timeliness of subsequent stress control are ensured.
Example 5
Based on the above embodiment, the determining the normal residual stress value of the to-be-detected portion by using the bulk wave detection method includes:
determining a second transmission time of the longitudinal wave with the propagation direction along the stress direction and a third transmission time of the shear wave with the propagation direction along the stress direction and the polarization direction perpendicular to the stress direction;
determining a normal residual stress value of the part to be detected based on the second transmission time, the third transmission time and corresponding second reference transmission time and third reference transmission time;
wherein the second reference propagation time is the propagation time of the longitudinal wave with the propagation direction along the stress direction measured under the condition of known stress; the third reference transit time is the transit time of a shear wave with a measured propagation direction along the stress direction and a polarization direction perpendicular to the stress direction, under a known stress.
Specifically, according to the foregoing embodiment, if the bulk wave propagation time corresponding to zero stress (i.e., the second reference transmission time and the third reference transmission time) and the bulk wave propagation time corresponding to the measured stress (i.e., the second transmission time and the third transmission time) are known, the normal residual stress value of the to-be-detected portion can be calculated according to the time difference and the corresponding formula. It is understood that the second reference transit time may be the transit time of the longitudinal wave along the stress direction in the case of any known stress, and is not limited to the case where the stress is 0; similarly, the third reference transit time may be the transit time of a shear wave with a propagation direction along the stress direction and a polarization direction perpendicular to the stress direction, in the case of any known stress, and is not limited to the case where the stress is 0.
The calculation formula is specifically as follows:
wherein epsilonL、εSThe acoustic elastic coefficients are respectively longitudinal wave acoustic elastic coefficient and transverse wave acoustic elastic coefficient, which are obtained by calibrating specific transducer spacing and measured materials; t isL0、TS0Acoustic time of 0 stress longitudinal wave and transverse wave, respectively, TL、TSWhen the sound is longitudinal wave and transverse wave with stress; σ is the stress in the propagation direction of the longitudinal and transverse waves.
The method for controlling the stress of the water delivery steel pipe determines second transmission time of longitudinal waves of which the propagation direction is along the stress direction and third transmission time of shear waves of which the propagation direction is along the stress direction and the polarization direction is perpendicular to the stress direction, and determines a normal residual stress value of a part to be detected based on the second transmission time, the third transmission time, corresponding second reference transmission time and third reference transmission time, wherein the second reference transmission time is the transmission time of the longitudinal waves of which the propagation direction is along the stress direction, which is measured under the condition of known stress; the third reference transmission time is the transmission time of the shear wave with the measured propagation direction along the stress direction and the polarization direction perpendicular to the stress direction under the condition of known stress, so that the normal residual stress value of the part to be detected can be accurately and efficiently determined, and the accuracy and timeliness of subsequent stress control are ensured.
Example 6
Based on the above embodiment, the adjusting the stress of the high stress node by using the high-energy sound beam control method includes:
adjusting the stress of the high-stress node based on a theoretical model for regulating and controlling the residual stress by high-energy ultrasound; wherein, the expression of the regulation theoretical model is as follows:
wherein E is the energy obtained by the high-power ultrasonic source provided by the high-energy ultrasonic and the mass element with the distance of x, and the volume of the mass element is V0Initial sound pressure of P0Density is rho0The sound velocity of ultrasonic wave is C, the amplitude of sound pressure is A, C is a constant, F is the ultrasonic frequency, F is an anisotropy factor, d is the diameter of a mass element crystal grain, K is a heat conduction coefficient, C isvIs constant specific heat capacity, cρAnd u is the constant pressure specific heat, the mass element vibration rate and t is the time.
Specifically, the essence of the residual stress is lattice elastic distortion which is caused by the constraint force between lattices to a great extent, and on the basis of a test phenomenon, the interaction between the constraint force field around dislocation and elastic fluctuation is analyzed by adopting a dislocation lattice model from the essence of the existence and generation of the residual stress, so that a regulation theoretical model of the high-energy ultrasound on the residual stress is provided.
The high-power ultrasonic source provided by the high-energy ultrasonic is spaced from the mass element with x, and the energy obtained by the mass element with x is as follows:
wherein E is the energy obtained by the high-power ultrasonic source provided by the high-energy ultrasonic and the mass element with the distance of x, and the volume of the mass element is V0Initial sound pressure of P0Density is rho0The sound velocity of ultrasonic wave is C, the amplitude of sound pressure is A, C is a constant, F is the ultrasonic frequency, F is the anisotropy factor, d is the diameter of the quality element crystal grain, and K is the heat transferCoefficient of conductivity, cvIs constant specific heat capacity, cρAnd u is constant pressure specific heat, the mass element vibration rate and t is time.
High-energy ultrasound provides energy of internal matter element of metal and density rho of metal material0C constant specific heat of materialvSpecific heat at constant pressure cρThe equal inherent property is in direct proportion and is in inverse proportion to the speed c of the ultrasonic wave propagating in the ultrasonic wave generator; meanwhile, it is proportional to the square of the frequency f and the amplitude a of the sound pressure provided by the ultrasound itself. When the energy provided by the ultrasonic waves to the internal elements of the metal is larger than the potential energy of the constraint force between crystal lattices, the residual stress in the metal is released.
According to the control method for the stress of the water delivery steel pipe, provided by the embodiment of the invention, the stress of the high-stress node is adjusted based on a theoretical model for regulating and controlling the residual stress by high-energy ultrasound; wherein, the expression of the regulation theoretical model is as follows:
the stress of the high-stress node can be accurately adjusted, and the early failure of the water delivery steel pipe structure is avoided.
Example 7
Based on the embodiment, the ultrasonic nondestructive testing probe is arranged in the main stress direction of the water delivery steel pipe.
Specifically, the direction of placing the probe should be as far as possible along the main stress direction of the pipe to be measured, and the main stress direction of the pipe to be measured can be preliminarily judged according to the use state, the processing method and the like of the pipe to be measured. Generally, the stress of the welding heat affected zone perpendicular to the welding direction is the main stress, i.e. for a straight weld, the circumferential stress should be detected; for ring welding, axial stress should be detected; for the residual stress of spiral, three-way and Y-shaped weld joints, the stress in the vertical welding direction should be detected. Fig. 4-9 are schematic views illustrating the arrangement direction of the ultrasonic nondestructive testing probe according to the embodiment of the present invention, in which the arrow indicates the arrangement direction of the probe, and a indicates the weld. Fig. 4 shows the arrangement direction of the probes corresponding to direct welding, fig. 5 shows the arrangement direction of the probes corresponding to ring welding, fig. 6 shows the arrangement direction of the probes corresponding to three-way welding, fig. 7 shows the arrangement direction of the probes corresponding to flange welding, fig. 8 shows the arrangement direction of the probes corresponding to variable wall thickness welding, and fig. 9 shows the arrangement direction of the probes corresponding to Y-shaped welding.
According to the control method of the stress of the water delivery steel pipe, provided by the embodiment of the invention, the ultrasonic nondestructive testing probe is arranged in the main stress direction of the water delivery steel pipe, so that the accuracy of monitoring the stress condition of each part of the water delivery pipeline can be ensured.
Example 8
Fig. 10 is a schematic structural diagram of a device for controlling stress of a water-conveying steel pipe according to an embodiment of the present invention, and as shown in fig. 10, the device includes:
a high stress node determination module 1001 for monitoring stress conditions of each part of the water delivery steel pipe and determining a high stress node;
and the stress control module 1002 is used for adjusting the stress of the high-stress node by adopting a high-energy sound beam control method.
Specifically, the control device for stress of a water delivery steel pipe according to an embodiment of the present invention is used to execute the method in the corresponding embodiment, and the specific steps of executing the method in the corresponding embodiment by using the control device for stress of a water delivery steel pipe according to the embodiment are the same as those in the corresponding embodiment, and are not described herein again.
Example 8
As shown in fig. 11, an embodiment of the present invention further provides an electronic device, which includes a processor 1101, a memory 1102, and a program or an instruction stored in the memory 1102 and executable on the processor 1101, where the program or the instruction is executed by the processor 1101 to implement each process of the embodiment of the method for controlling stress of a water pipe, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
Example 9
The embodiment of the present invention further provides a readable storage medium, where a program or an instruction is stored, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the embodiment of the method for controlling stress of a water delivery steel pipe, and can achieve the same technical effect, and in order to avoid repetition, the detailed description is omitted here.
The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.
It should be noted that, in this document, 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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of embodiments of the present invention is not limited to performing functions in the order illustrated or discussed, but may include performing functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The method for controlling the stress of the water delivery steel pipe is characterized by comprising the following steps:
monitoring the stress condition of each part of the water delivery steel pipe, and determining high-stress nodes;
and adjusting the stress of the high-stress node by adopting a high-energy sound beam control method.
2. The method for controlling the stress of the water delivery steel pipe according to claim 1, wherein the step of monitoring the stress condition of each part of the water delivery steel pipe and determining a high-stress node comprises the following steps:
determining the stress value of each part of the water delivery steel pipe based on an ultrasonic nondestructive testing probe;
and comparing the stress value of each part with a preset threshold value to determine a high-stress node.
3. The method for controlling the stress of the water delivery steel pipe according to claim 2, wherein the determining the stress value of each part of the water delivery steel pipe based on the ultrasonic nondestructive testing probe comprises the following steps:
determining a tangential residual stress value of a part to be detected by adopting a critical refraction longitudinal wave detection method;
and determining the normal residual stress value of the part to be detected by adopting a body wave detection method.
4. The method for controlling the stress of the water delivery steel pipe according to claim 3, wherein the step of determining the tangential residual stress value of the part to be detected by adopting a critical refraction longitudinal wave detection method comprises the following steps:
determining a first transmission time of a critical refraction longitudinal wave propagating along the surface layer of the part to be detected;
determining a tangential residual stress value of the part to be detected based on the first transmission time and a first reference transmission time;
wherein the first reference transmission time is the transmission time of the critical refraction longitudinal wave which is measured and transmitted along the surface layer of the part to be detected under the condition of known stress.
5. The method for controlling the stress of the water delivery steel pipe according to claim 3, wherein the step of determining the normal residual stress value of the part to be detected by adopting a body wave detection method comprises the following steps:
determining a second transmission time of the longitudinal wave with the propagation direction along the stress direction and a third transmission time of the shear wave with the propagation direction along the stress direction and the polarization direction perpendicular to the stress direction;
determining a normal residual stress value of the part to be detected based on the second transmission time, the third transmission time and corresponding second reference transmission time and third reference transmission time;
wherein the second reference propagation time is the propagation time of the longitudinal wave with the propagation direction along the stress direction measured under the condition of known stress; the third reference transit time is the transit time of a shear wave with a measured propagation direction along the stress direction and a polarization direction perpendicular to the stress direction, under a known stress.
6. The method for controlling the stress of the water conveying steel pipe according to claim 1, wherein the step of adjusting the stress of the high-stress node by adopting a high-energy sound beam control method comprises the following steps:
adjusting the stress of the high-stress node based on a theoretical model for regulating and controlling the residual stress by high-energy ultrasound; wherein, the expression of the regulation theoretical model is as follows:
wherein E is the energy obtained by the high-power ultrasonic source provided by the high-energy ultrasonic and the mass element with the distance of x, and the volume of the mass element is V0Initial sound pressure of P0Density is rho0The sound velocity of ultrasonic wave is C, the amplitude of sound pressure is A, C is a constant, F is the ultrasonic frequency, F is an anisotropy factor, d is the diameter of a mass element crystal grain, K is a heat conduction coefficient, C isvIs constant specific heat capacity, cρAnd u is constant pressure specific heat, the mass element vibration rate and t is time.
7. The method as claimed in claim 2, wherein the ultrasonic nondestructive testing probe is disposed in the main stress direction of the water pipe.
8. A control device of water delivery steel pipe stress, characterized in that, the device includes:
the high stress node determining module is used for monitoring the stress condition of each part of the water delivery steel pipe and determining a high stress node;
and the stress control module is used for adjusting the stress of the high-stress node by adopting a high-energy sound beam control method.
9. An electronic device comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, wherein the program or instructions when executed by the processor implement the steps of the method of controlling the stress of a water pipe according to any one of claims 1 to 7.
10. A readable storage medium, storing thereon a program or instructions which, when executed by a processor, implement the steps of the method of controlling the stress of a water pipe according to any one of claims 1 to 7.
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