CN110781630A - GIS equipment pipeline structure temperature difference stress deformation online monitoring method - Google Patents
GIS equipment pipeline structure temperature difference stress deformation online monitoring method Download PDFInfo
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Abstract
The invention relates to the technical field of GIS equipment detection and maintenance, in particular to an online monitoring method for temperature difference stress deformation of a GIS equipment pipeline structure. The method comprises the following steps: s101, establishing a GIS pipeline structure three-dimensional geometric model; s102, material attribute endowing and grid dividing; s103, determining boundary conditions; s104, analyzing thermal stress; s105, checking a stress result and a displacement result; and S106, real-time monitoring and safety evaluation. The invention has the advantages that: (1) the method is simple and effective. (2) The problems of high cost and poor measurement precision of a manual monitoring mode can be solved. (3) The model parameters can be flexibly adjusted, and the application range is wide. (4) Can carry out safety risk assessment to GIS equipment pipeline structure, guarantee equipment safety and stability operation.
Description
Technical Field
The invention relates to the technical field of GIS equipment detection and maintenance, in particular to an online monitoring method for temperature difference stress deformation of a GIS equipment pipeline structure.
Background
Gas Insulated metal enclosed switchgear, referred to as gis (gas Insulated switchgear for short), is a core device for construction of a transformer substation at present, has the characteristics of compact structure, small floor area, strong anti-interference capability, small maintenance amount in the operation process and the like, is widely used in national power grids, and is widely used in various voltage levels of 110kV, 220kV, 330kV, 500kV, 750kV and 1000kV at present.
With the continuous expansion of the use scale and the continuous expansion of the research direction, the electrical insulation technology of the GIS equipment is gradually improved in recent years, domestic manufacturers introduce absorption and carry out a large amount of independent innovation and transformation according to local conditions, but the research on the safe operation of the long pipeline structure of the GIS equipment in different natural environments is relatively lacked, so that the environmental characteristics of large temperature difference, strong ultraviolet rays and the like are not effectively considered in the links of design, manufacture, installation and the like of the equipment, the problem of stress deformation of metal materials caused by temperature change can not be effectively absorbed in the operation process of the pipeline structure, the equipment often has the problems of foundation crack, barrel crack, basin-type insulator crack, framework deformation, extreme weather flange surface air leakage and the like, and the difficulty is brought to the safe and stable operation of the equipment.
In recent years, faults and events of the GIS equipment caused by environmental temperature changes continuously occur in a national grid company system, fault investigation finds that the GIS equipment has displacement changes, but the GIS equipment is not provided with a part for recording the displacement change amount when leaving a factory, and some equipment is only provided with a slidable ruler for recording the displacement change amount, but the simple mechanical ruler has neither a memory function nor can send out alarm signals of displacement change exceeding the limit for operators to process. Moreover, GIS equipment takes place tensile or compression deformation along with ambient temperature change constantly, and fixed mechanical ruler utensil just needs personnel to constantly record at the scene in order to play a role to the observation ability requires highly, and the change volume of millimeter level is a heavy burden to the observation personnel also, and the record work load is also very big. The observation of the specific displacement variation is an important basis for GIS equipment fault investigation and analysis, but no effective method exists at present.
The finite element numerical simulation technology is an effective means for improving the product quality, shortening the design period and improving the product competitiveness, so that with the development of computer technology and calculation method, the finite element method gets more and more extensive attention and application in the fields of engineering design and scientific research, and becomes an effective way for solving the problem of complex engineering analysis and calculation. In the power industry, the finite element numerical simulation technology is mainly used for intensity check of all structural parts, electrostatic field and voltage distribution of insulators, temperature distribution of cables and live equipment, energy loss generated by electromagnetic induction and the like.
In finite element analysis and calculation, the temperature difference stress deformation of the GIS equipment pipeline structure belongs to thermal stress analysis, the thermal stress analysis belongs to coupling field analysis, and the coupling field analysis refers to analysis considering the interaction between two or more engineering physical fields. The analysis methods of the coupled field are roughly classified into two types, i.e., direct coupling and sequential coupling. Thermal stress analysis is a typical sequential coupling example, the heat transfer process and the stress process analysis can be performed separately, the thermal analysis is performed first, and the temperature field simulation result obtained by the thermal analysis is applied to the subsequent structural stress analysis as a thermal load, so that the thermal stress coupling solving problem is simplified, and a large amount of calculation time required by the coupling analysis is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides the GIS equipment on-line monitoring method which has high precision and good real-time performance, can record all displacement change conditions and can send out alarm signals according to requirements, and is favorable for improving the running and fault investigation efficiency of the GIS equipment.
In order to achieve the purpose, the invention adopts the technical scheme that:
a GIS equipment pipeline structure temperature difference stress deformation online monitoring method comprises the following steps:
s101, establishing a GIS pipeline structure three-dimensional geometric model; s102, material attribute endowing and grid dividing; s103, determining boundary conditions; s104, analyzing thermal stress; s105, checking a stress result and a displacement result; and S106, real-time monitoring and safety evaluation.
Further, the GIS pipeline structure in the step S101 includes, but is not limited to, a bus bar barrel, a sliding support, a fixed support, a bellows compensator, an insulating basin, a bolt, and a nut.
Further, the method for establishing the three-dimensional geometric model in step S101 includes, but is not limited to: directly utilizing a self-contained modeling tool of a preprocessor of finite element analysis software to establish a model and dividing grids; creating a solid model in CAD (computer-aided design), UG (UG) or Solidworks software, reading in through a data interface, and dividing a grid after modification to establish a finite element model; modeling by directly creating features of the node and unit models; and creating a model in MASS (MASS spectral analysis) software, Workbench software or ICEM (integrated computer engineering) software, and reading node and unit data into finite element analysis software.
Further, the material properties in step S102 include, but are not limited to, specific heat capacity, linear expansion coefficient, thermal conductivity, density, elastic modulus, poisson' S ratio, and yield strength of the material; the GIS equipment pipeline structure cylinder is divided in a hexahedral mesh mode, and the shell model is divided in a calculation process in a quadrilateral mesh mode.
Further, the boundary condition in the step S103 is the real-time temperature of the GIS device pipeline, the fixed support is set as the fixed constraint condition, the sliding support is set as the sliding direction freedom release, the other freedom constraints are set, and the tank internal pressure is set as the fixed constraint condition.
Further, the S104 thermal stress analysis includes: s401, calculating a temperature field of the three-dimensional geometric model through thermophysical parameters, grid division and heat load; and S402, calculating a stress field by combining the temperature field obtained in S401 with the conversion unit, the mechanical parameters and the mechanical load as a temperature load.
Further, the stress result in the step S105 is compared with the maximum equivalent stress value of the bus barrel of the GIS pipeline structure; and comparing the displacement result with the shrinkage range of the GIS pipeline structure temperature compensation unit.
Further, the evaluation method in step S106 is: if the obtained equivalent stress value is larger than the yield strength of the GIS equipment pipeline structure material, the GIS equipment pipeline structure generates plastic deformation, the GIS equipment pipeline structure is easy to crack, potential safety hazards exist, and otherwise, the GIS equipment pipeline structure runs safely; if the obtained displacement deformation value is larger than the contraction value of the GIS equipment pipeline structure temperature compensation unit, the GIS equipment pipeline structure is easy to crack, potential safety hazards exist, and otherwise, the GIS equipment pipeline structure runs safely.
Further, the boundary condition in the step S103 is the real-time temperature of the GIS device pipeline, and the temperature is measured by an online infrared thermometer.
The invention utilizes finite element simulation technology to carry out temperature stress deformation on-line monitoring on GIS equipment pipelines. The temperature sensor or the infrared thermometer is utilized to measure the temperature of the GIS equipment pipeline structure in real time, data are transmitted to the cloud end in a wireless mode, the temperature data are input into finite element analysis software, real-time displacement data of the GIS equipment pipeline structure are obtained through thermal stress analysis, operation and maintenance personnel can monitor the GIS equipment pipeline structure in real time and evaluate the GIS equipment pipeline structure safely and stably, and the equipment is guaranteed to operate safely and stably. The invention adopts a non-contact infrared thermometer to measure real-time temperature data, and stores and uploads the temperature data so as to be convenient for subsequent analysis.
The invention utilizes the finite element simulation technology to carry out on-line monitoring on the temperature stress deformation of the GIS equipment pipeline, and the temperature data is used as boundary conditions to be input into software for thermal stress analysis to obtain stress and displacement deformation data, thereby achieving the purpose of on-line monitoring. The finite element analysis model is represented as a solid model, the essence of which is to construct and express the geometric shape in a mathematical way, and is a carrier of grid nodes and units, and does not participate in the finite element analysis per se. The model can be established by several ways: (1) directly utilizing a self-contained modeling tool of a preprocessor of finite element analysis software to establish a model and dividing grids; (2) creating a solid model in special CAD software (such as UG and Solidworks), reading in through a data interface, and dividing a grid after modification to establish a finite element model; (3) feature modeling (direct creation of node and unit models); (4) and (3) creating a model in other special CAE software (such as MASS, Workbench and ICEM), and reading the node and unit data into finite element analysis software. And (4) applying a load on the finite element model established in the first step, and then entering a solver to solve. And the coupling field analysis can be carried out at the end of checking the calculation result.
And judging whether the GIS equipment pipeline structure operates safely according to the equivalent stress and displacement deformation result obtained by finite element analysis. If the obtained equivalent stress value is larger than the yield strength of the GIS equipment pipeline structure material, the GIS equipment pipeline structure generates plastic deformation, the GIS equipment pipeline structure is easy to crack, potential safety hazards exist, and otherwise, the GIS equipment pipeline structure runs safely; if the obtained displacement deformation value is larger than the contraction value of the GIS equipment pipeline structure temperature compensation unit, the GIS equipment pipeline structure is easy to crack, potential safety hazards exist, and otherwise, the GIS equipment pipeline structure runs safely.
The invention provides an online monitoring method for temperature difference stress deformation of a GIS equipment pipeline structure, which adopts a non-contact infrared thermometer, stores and uploads temperature data and then carries out subsequent analysis, the infrared thermometer can monitor the real-time temperature of the GIS equipment pipeline online all day long, the measurement result is accurate, and the problems of high cost and poor measurement precision of a manual monitoring mode can be solved.
The invention provides an online monitoring method for temperature difference stress deformation of a GIS (geographic information System) equipment pipeline structure, which is simple and effective, and realizes real-time monitoring and safety evaluation by establishing a GIS pipeline structure three-dimensional geometric model, giving material properties, dividing grids, determining boundary conditions, analyzing thermal stress, and checking stress results and displacement results.
The invention provides an online monitoring method for temperature difference stress deformation of a GIS equipment pipeline structure, which can adjust model parameters and other parameters according to actual parameters of the GIS equipment pipeline, thereby realizing online monitoring of temperature difference stress deformation of various GIS equipment pipeline structures and having wide application range.
The invention provides an online monitoring method for temperature difference stress deformation of a GIS equipment pipeline structure, which is used for evaluating the safety risk of the GIS equipment pipeline structure, ensuring the safe and stable operation of equipment, greatly reducing manpower and material resources and having great social benefit and economic benefit.
Compared with the prior art, the online monitoring method for temperature difference stress deformation of the GIS equipment pipeline structure, provided by the invention, has the advantages that:
(1) the method is simple and effective.
(2) The problems of high cost and poor measurement precision of a manual monitoring mode can be solved.
(3) The model parameters can be flexibly adjusted, and the application range is wide.
(4) Can carry out safety risk assessment to GIS equipment pipeline structure, guarantee equipment safety and stability operation.
Drawings
FIG. 1 is a technical scheme of the present invention.
FIG. 2 is a flow chart of the calculation of the thermal stress analysis of the present invention.
FIG. 3 is a schematic view of a GIS equipment pipeline measured by the infrared thermometer of the present invention.
FIG. 4 is a three-dimensional model of the pipeline structure of the GIS device built by the present invention.
FIG. 5 is a GIS device meshing model in the model calculation process of the present invention.
FIG. 6 is a GIS device model with boundary conditions imposed by the present invention.
FIG. 7 is a schematic diagram of equivalent stress at 70 ℃ for the GIS pipeline structure of the present invention.
FIG. 8 is a schematic diagram of the GIS pipeline structure of the present invention showing displacement deformation at 70 ℃.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following examples further describe the present invention in detail, and the following examples are only used for illustrating the present invention, but not for limiting the scope of the present invention.
A GIS equipment pipeline structure temperature difference stress deformation online monitoring method comprises the following steps:
s101, establishing a GIS pipeline structure three-dimensional geometric model; s102, material attribute endowing and grid dividing; s103, determining boundary conditions; s104, analyzing thermal stress; s105, checking a stress result and a displacement result; and S106, real-time monitoring and safety evaluation.
Further, the GIS pipeline structure in the step S101 includes, but is not limited to, a bus bar barrel, a sliding support, a fixed support, a bellows compensator, an insulating basin, a bolt, and a nut.
Further, the method for establishing the three-dimensional geometric model in step S101 includes, but is not limited to: directly utilizing a self-contained modeling tool of a preprocessor of finite element analysis software to establish a model and dividing grids; creating a solid model in CAD (computer-aided design), UG (UG) or Solidworks software, reading in through a data interface, and dividing a grid after modification to establish a finite element model; modeling by directly creating features of the node and unit models; and creating a model in MASS (MASS spectral analysis) software, Workbench software or ICEM (integrated computer engineering) software, and reading node and unit data into finite element analysis software.
Further, the material properties in step S102 include, but are not limited to, specific heat capacity, linear expansion coefficient, thermal conductivity, density, elastic modulus, poisson' S ratio, and yield strength of the material; the GIS equipment pipeline structure cylinder is divided in a hexahedral mesh mode, and the shell model is divided in a calculation process in a quadrilateral mesh mode.
Further, the boundary condition in the step S103 is the real-time temperature of the GIS device pipeline, the fixed support is set as the fixed constraint condition, the sliding support is set as the sliding direction freedom release, the other freedom constraints are set, and the tank internal pressure is set as the fixed constraint condition.
Further, the S104 thermal stress analysis includes: s401, calculating a temperature field of the three-dimensional geometric model through thermophysical parameters, grid division and heat load; and S402, calculating a stress field by combining the temperature field obtained in S401 with the conversion unit, the mechanical parameters and the mechanical load as a temperature load.
Further, the stress result in the step S105 is compared with the maximum equivalent stress value of the bus barrel of the GIS pipeline structure; and comparing the displacement result with the shrinkage range of the GIS pipeline structure temperature compensation unit.
Further, the evaluation method in step S106 is: if the obtained equivalent stress value is larger than the yield strength of the GIS equipment pipeline structure material, the GIS equipment pipeline structure generates plastic deformation, the GIS equipment pipeline structure is easy to crack, potential safety hazards exist, and otherwise, the GIS equipment pipeline structure runs safely; if the obtained displacement deformation value is larger than the contraction value of the GIS equipment pipeline structure temperature compensation unit, the GIS equipment pipeline structure is easy to crack, potential safety hazards exist, and otherwise, the GIS equipment pipeline structure runs safely.
Further, the boundary condition in the step S103 is the real-time temperature of the GIS device pipeline, and the temperature is measured by an online infrared thermometer.
Example 1
Referring to fig. 1 to 3, an online monitoring method for temperature difference stress deformation of a pipeline structure of a GIS device includes the following steps:
s101, establishing a GIS pipeline structure three-dimensional geometric model;
the GIS pipeline structure comprises a bus barrel, a sliding support, a fixed support, a corrugated pipe compensator, an insulating basin, a bolt and a nut.
The method for establishing the three-dimensional geometric model is to directly utilize a self-contained modeling tool of a preprocessor of finite element analysis software to establish the model and divide meshes.
S102, material attribute endowing and grid dividing;
the material properties comprise specific heat capacity, linear expansion coefficient, thermal conductivity, density, elastic modulus, Poisson's ratio and yield strength of the material; the GIS equipment pipeline structure cylinder is divided in a hexahedral mesh mode, and the shell model is divided in a calculation process in a quadrilateral mesh mode.
S103, determining boundary conditions;
the boundary condition is the real-time temperature of the GIS equipment pipeline, the fixed support position is set as a fixed constraint condition, the sliding support position is set as a sliding direction freedom degree release, other freedom degrees are constrained, and the tank body internal pressure is set as a fixed constraint condition. The temperature is measured by an online infrared thermometer.
S104, analyzing thermal stress;
the thermal stress analysis comprises: s401, calculating a temperature field of the three-dimensional geometric model through thermophysical parameters, grid division and heat load; and S402, calculating a stress field by combining the temperature field obtained in S401 with the conversion unit, the mechanical parameters and the mechanical load as a temperature load.
S105, checking a stress result and a displacement result;
comparing the stress result with the maximum equivalent stress value of the bus barrel of the GIS pipeline structure; and comparing the displacement result with the shrinkage range of the GIS pipeline structure temperature compensation unit.
And S106, real-time monitoring and safety evaluation.
The evaluation method comprises the following steps: if the obtained equivalent stress value is larger than the yield strength of the GIS equipment pipeline structure material, the GIS equipment pipeline structure generates plastic deformation, the GIS equipment pipeline structure is easy to crack, potential safety hazards exist, and otherwise, the GIS equipment pipeline structure runs safely; if the obtained displacement deformation value is larger than the contraction value of the GIS equipment pipeline structure temperature compensation unit, the GIS equipment pipeline structure is easy to crack, potential safety hazards exist, and otherwise, the GIS equipment pipeline structure runs safely.
Example 2
Referring to fig. 1 to 3, an online monitoring method for temperature difference stress deformation of a pipeline structure of a GIS device includes the following steps:
s101, establishing a GIS pipeline structure three-dimensional geometric model;
the GIS pipeline structure comprises a bus barrel, a sliding support, a fixed support, a corrugated pipe compensator, an insulating basin, a bolt and a nut. The method for establishing the three-dimensional geometric model is to establish a model in Workbench software and read node and unit data into finite element analysis software.
S102, material attribute endowing and grid dividing;
the material properties comprise specific heat capacity, linear expansion coefficient, thermal conductivity, density, elastic modulus, Poisson's ratio and yield strength of the material; the GIS equipment pipeline structure cylinder is divided in a hexahedral mesh mode, and the shell model is divided in a calculation process in a quadrilateral mesh mode.
S103, determining boundary conditions;
the boundary condition is the real-time temperature of the GIS equipment pipeline, the fixed support position is set as a fixed constraint condition, the sliding support position is set as a sliding direction freedom degree release position, other freedom degree constraints are added, meanwhile, the influence of gravity is added, and the tank body internal pressure is set as a fixed constraint condition. The temperature is measured by an online infrared thermometer.
S104, analyzing thermal stress;
the thermal stress analysis comprises: s401, calculating a temperature field of the three-dimensional geometric model through thermophysical parameters, grid division and heat load; and S402, calculating a stress field by combining the temperature field obtained in S401 with the conversion unit, the mechanical parameters and the mechanical load as a temperature load.
S105, checking a stress result and a displacement result;
comparing the stress result with the maximum equivalent stress value of the bus barrel of the GIS pipeline structure; and comparing the displacement result with the shrinkage range of the GIS pipeline structure temperature compensation unit.
And S106, real-time monitoring and safety evaluation.
The evaluation method comprises the following steps: if the obtained equivalent stress value is larger than the yield strength of the GIS equipment pipeline structure material, the GIS equipment pipeline structure generates plastic deformation, the GIS equipment pipeline structure is easy to crack, potential safety hazards exist, and otherwise, the GIS equipment pipeline structure runs safely; if the obtained displacement deformation value is larger than the contraction value of the GIS equipment pipeline structure temperature compensation unit, the GIS equipment pipeline structure is easy to crack, potential safety hazards exist, and otherwise, the GIS equipment pipeline structure runs safely.
Example 3
With reference to fig. 1 to 8, the online infrared thermometer is used for measuring the real-time temperature of the pipeline structure of the GIS device in the present embodiment, and when the online infrared thermometer is used, the online infrared thermometer is fixed right in front of the pipeline structure of the GIS device and is fixed, as shown in fig. 3, so that the real-time temperature of the pipeline structure of the GIS device can be measured. The temperature data storage and transmission is to store the data locally through an SD card and then transmit the data by using a data transmission radio station.
Taking a GIS equipment pipeline structure of a certain 750kV transformer substation as an example, firstly, according to the geometric dimension of the GIS equipment pipeline structure actually measured on site, a three-dimensional model of the GIS equipment pipeline structure is established by using three-dimensional solid modeling software, as shown in FIG. 4. The characteristic model in the integral model mainly comprises geometrical characteristics such as a bus barrel, a sliding support, a fixed support, a corrugated pipe compensator, an insulating basin, bolts and nuts, and the model is simplified in consideration of the requirement of finite element calculation in the later stage, so that some geometrical characteristics are reasonably simplified in the process of building the GIS equipment pipeline structure model.
And establishing a finite element model according to the geometric characteristics and the finite element analysis characteristics of the GIS equipment pipeline structure cylinder. In order to ensure the accuracy of the integral finite element calculation, the entity model is divided in a hexahedral mesh mode in the calculation process, and the shell model is divided in a quadrilateral mesh mode in the calculation process. As shown in fig. 5.
Taking temperature data measured by an infrared thermometer as a boundary condition, in the embodiment, taking the example that the temperature of the GIS pipeline structure cylinder measured by the infrared thermometer is 70 ℃, setting a fixed support position as a fixed constraint condition; setting the sliding support position as the freedom degree release in the sliding direction and the constraint of other freedom degrees; setting the internal pressure of the tank body to be 0.4 Mpa; taking into account the effect of gravity, specific boundary conditions apply as shown in fig. 6.
The equivalent stress and displacement deformation conditions of the GIS pipeline structure at 70 ℃ can be obtained through the setting and calculation analysis of the boundary conditions, as shown in FIGS. 7 and 8. As can be seen from the figure, the maximum equivalent stress value of the bus cylinder of the GIS pipeline structure is 161.13MPa, which is less than the yield strength of the cylinder material, and no plastic deformation occurs; the maximum displacement value of the bus tube body of the GIS pipeline structure is 15.775mm, is smaller than the shrinkage range of the GIS pipeline structure temperature compensation unit, and does not crack.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various changes may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are included in the protective scope of the present invention.
It should be noted that, in the foregoing embodiments, various specific technical features and steps described in the above embodiments can be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations of the features and steps are not described separately.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (9)
1. A GIS equipment pipeline structure temperature difference stress deformation online monitoring method is characterized by comprising the following steps:
s101, establishing a GIS pipeline structure three-dimensional geometric model;
s102, material attribute endowing and grid dividing;
s103, determining boundary conditions;
s104, analyzing thermal stress;
s105, checking a stress result and a displacement result;
and S106, real-time monitoring and safety evaluation.
2. The GIS equipment pipeline structure temperature difference stress deformation online monitoring method according to claim 1, characterized in that:
the GIS pipeline structure in the step S101 includes but is not limited to a bus barrel, a sliding support, a fixed support, a corrugated pipe compensator, an insulating basin, a bolt and a nut.
3. The GIS equipment pipeline structure temperature difference stress deformation online monitoring method according to claim 1, characterized in that: the method for establishing the three-dimensional geometric model in the step S101 includes, but is not limited to:
directly utilizing a self-contained modeling tool of a preprocessor of finite element analysis software to establish a model and dividing grids;
creating a solid model in CAD (computer-aided design), UG (UG) or Solidworks software, reading in through a data interface, and dividing a grid after modification to establish a finite element model;
modeling by directly creating features of the node and unit models;
and creating a model in MASS (MASS spectral analysis) software, Workbench software or ICEM (integrated computer engineering) software, and reading node and unit data into finite element analysis software.
4. The GIS equipment pipeline structure temperature difference stress deformation online monitoring method according to claim 1, characterized in that: the material properties in the step S102 include, but are not limited to, specific heat capacity, linear expansion coefficient, thermal conductivity, density, elastic modulus, poisson' S ratio, and yield strength of the material;
the GIS equipment pipeline structure cylinder is divided in a hexahedral mesh mode, and the shell model is divided in a calculation process in a quadrilateral mesh mode.
5. The GIS equipment pipeline structure temperature difference stress deformation online monitoring method according to claim 1, characterized in that: and S103, setting the boundary condition as the real-time temperature of the GIS equipment pipeline, setting the fixed support part as a fixed constraint condition, setting the sliding support part as a sliding direction freedom degree release, setting other freedom degrees as constraints, and setting the tank body internal pressure as a fixed constraint condition.
6. The GIS equipment pipeline structure temperature difference stress deformation online monitoring method according to claim 1, characterized in that: the S104 thermal stress analysis includes:
s401, calculating a temperature field of the three-dimensional geometric model through thermophysical parameters, grid division and heat load;
and S402, calculating a stress field by combining the temperature field obtained in S401 with the conversion unit, the mechanical parameters and the mechanical load as a temperature load.
7. The GIS equipment pipeline structure temperature difference stress deformation online monitoring method according to claim 1, characterized in that: the stress result in the step S105 is compared with the maximum equivalent stress value of the bus barrel of the GIS pipeline structure;
and comparing the displacement result with the shrinkage range of the GIS pipeline structure temperature compensation unit.
8. The GIS equipment pipeline structure temperature difference stress deformation online monitoring method according to claim 1, characterized in that: the evaluation method in the step S106 is as follows:
if the obtained equivalent stress value is larger than the yield strength of the GIS equipment pipeline structure material, the GIS equipment pipeline structure generates plastic deformation, the GIS equipment pipeline structure is easy to crack, potential safety hazards exist, and otherwise, the GIS equipment pipeline structure runs safely;
if the obtained displacement deformation value is larger than the contraction value of the GIS equipment pipeline structure temperature compensation unit, the GIS equipment pipeline structure is easy to crack, potential safety hazards exist, and otherwise, the GIS equipment pipeline structure runs safely.
9. The GIS equipment pipeline structure temperature difference stress deformation online monitoring method according to claim 1, characterized in that: and in the step S103, the boundary condition is the real-time temperature of the GIS equipment pipeline, and the temperature is measured by an online infrared thermometer.
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| CN113076670A (en) * | 2021-03-26 | 2021-07-06 | 贵州航天电子科技有限公司 | Multi-physical-field coupled phased array guidance micro-system collaborative optimization method |
| CN113420479A (en) * | 2021-06-22 | 2021-09-21 | 辽宁东科电力有限公司 | GIS pipeline compensation corrugated pipe monitoring and evaluating method |
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| CN111783259A (en) * | 2020-07-31 | 2020-10-16 | 徐州巴特工程机械股份有限公司 | Safety assessment method for bucket structure |
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| CN112097725A (en) * | 2020-08-01 | 2020-12-18 | 国网辽宁省电力有限公司电力科学研究院 | Temperature compensation type expansion joint checking and adjusting method for outdoor GIS bus |
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| CN113076670B (en) * | 2021-03-26 | 2022-10-18 | 贵州航天电子科技有限公司 | Multi-physical-field coupled phased array guidance micro-system collaborative optimization method |
| CN113051803A (en) * | 2021-04-16 | 2021-06-29 | 哈尔滨理工大学 | Method for detecting resistance of cable core in production process |
| CN113420479A (en) * | 2021-06-22 | 2021-09-21 | 辽宁东科电力有限公司 | GIS pipeline compensation corrugated pipe monitoring and evaluating method |
| CN116127660A (en) * | 2022-11-18 | 2023-05-16 | 武汉市缔佳源建筑劳务有限公司 | Intelligent pipe network intelligent integrated management platform based on GIS |
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