A life prediction system for the clamped area of a bolt fastener

Abstract

The present invention discloses a life prediction system for the clamped area of a bolt fastener, which relates to the technical field of life prediction for bolt fasteners. The system comprises a data acquisition module, a data processing module, an early warning module and a result display module. The data acquisition module is used for real-time sensing and detection of sensing detection information of the clamped areas of a batch of bolt fasteners. The data processing module is used for obtaining initial damage characteristics, damage accumulation characteristics, remaining life characteristics and remaining life average characteristics. The result display module judges the life quality inspection result based on the comparison result of the remaining life average characteristic with the reference life characteristic, and displays the life quality inspection result and the remaining life average characteristic. The present invention takes into account the coupling effect of stress and temperature on the initial damage of the clamped area of the bolt, introduces vibration factors, and associates damage accumulation with the design life and actual strain of the bolt, forming a complete cycle system from initial damage assessment to comprehensive damage accumulation to life prediction.

Description

Technical Field

[0001] The present invention relates to the technical field of life prediction of bolt fasteners, in particular to a life prediction system for a clamped area of a bolt fastener. Background Art

[0002] In industrial production and machinery manufacturing, bolt fasteners are common fasteners used in a wide variety of equipment and structures. The lifespan of the bolt's clamping zone is directly related to the reliability and safety of the entire equipment. For example, in the aerospace, automotive, and power equipment industries, bolt failure can lead to serious accidents and economic losses. Therefore, accurately predicting the lifespan of bolt fasteners' clamping zones is of great practical significance.

[0003] Most existing technologies only consider the impact of a single physical field on bolt life, specifically focusing only on the stress field while ignoring the interactions of other physical fields such as temperature and vibration.

[0004] In actual operation, bolt damage is a gradual accumulation process, which is continuously affected by multiple factors such as stress, temperature, and vibration. However, existing technologies make it difficult to track and reflect the dynamic changes of this damage accumulation in real time.

[0005] When predicting life, existing technologies often fail to fully consider the actual strain of the bolts during operation. The actual strain reflects the degree of deformation of the bolts and is closely related to the damage and life of the bolts. If the influence of the actual strain is ignored, the life prediction results will deviate significantly from the actual situation. Summary of the Invention

[0006] The purpose of the present invention is to provide a life prediction system for the clamped area of a bolt fastener, which solves the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions, including a data acquisition module, a data processing module, an early warning module and a result display module;

[0008] The data acquisition module is used for real-time sensing and detecting the sensing detection information of the clamping area of the same batch of bolt fasteners;

[0009] The sensing detection information includes stress characteristics, temperature information and vibration information;

[0010] The data processing module is used to receive the sensor detection information;

[0011] Extracting the material yield strength characteristic, elastic modulus, reference room temperature characteristic, reference vibration frequency characteristic, reference vibration acceleration amplitude characteristic, reference strain characteristic, and reference life characteristic that are preset and stored in the data processing module;

[0012] For the same batch of standard bolt fasteners, the material yield strength characteristics, elastic modulus, reference room temperature characteristics, reference vibration frequency characteristics, reference vibration acceleration amplitude characteristics, reference strain characteristics and reference life characteristics can be obtained based on the technical data provided by the bolt manufacturer;

[0013] Acquiring initial damage characteristics according to the material yield strength characteristics, the stress characteristics, the reference room temperature characteristics, and the temperature information;

[0014] Acquire a damage accumulation feature according to the initial damage feature, the reference vibration frequency feature, the reference vibration acceleration amplitude feature, and the vibration information;

[0015] Obtaining a remaining life feature according to the damage accumulation feature, the elastic modulus, the stress feature, the reference strain feature, and the reference life feature;

[0016] Averaging the remaining life characteristics of the same batch of bolt fasteners to obtain an average remaining life characteristic, and transmitting the average remaining life characteristic to the result display module;

[0017] The result display module is configured to determine a life quality inspection result based on a comparison result between the remaining life average characteristic and the reference life characteristic, and to display the life quality inspection result and the remaining life average characteristic;

[0018] The early warning module receives and issues an early warning for the sensor detection information and the life quality inspection result.

[0019] Optionally, the equipment used by the data acquisition module includes a strain gauge, a temperature sensor, an acceleration sensor and a data acquisition instrument, and the input end of the data acquisition instrument is connected to the output ends of the strain gauge, the temperature sensor and the acceleration sensor;

[0020] The strain gauge is used to obtain the stress characteristics and transmit them to the data acquisition instrument;

[0021] The temperature sensor is used to obtain the temperature information and transmit it to the data acquisition instrument;

[0022] The acceleration sensor is used to obtain the vibration information and transmit it to the data acquisition instrument;

[0023] The data acquisition instrument is used to obtain the stress characteristics, the temperature information and the vibration information, and transmit them to the data processing module.

[0024] Optionally, the devices used by the data processing module include storage devices and computing devices;

[0025] The computing device is configured to obtain the initial damage characteristic, the damage accumulation characteristic, the remaining life characteristic, and the remaining life average characteristic;

[0026] The storage device is used to receive and store the sensing detection information, the initial damage characteristics, the damage accumulation characteristics, the remaining life characteristics and the remaining life average characteristics.

[0027] Optionally, the temperature information includes actual room temperature characteristics and temperature reference characteristics;

[0028] The fastener materials of the same batch of bolt fasteners include ordinary carbon steel and high-temperature alloy;

[0029] Determining and obtaining the temperature reference characteristic based on the fastener material;

[0030] If it is ordinary carbon steel, the temperature reference characteristic is 80K-120K;

[0031] If it is a high-temperature alloy, the temperature reference characteristic is 150K-200K;

[0032] Obtaining a stress hazard characteristic based on the stress characteristic and the material yield strength characteristic. The stress hazard characteristic reflects the ratio of the actual stress borne by the bolt to the yield strength of the material, and reflects the degree of hazard of the stress currently borne by the bolt. If the value is close to or greater than 1, it indicates that the stress borne by the bolt is close to or exceeds its yield limit, and plastic deformation is likely to occur.

[0033] Obtaining a temperature influence characteristic on the bolt based on the temperature reference characteristic, the actual room temperature characteristic, and the reference room temperature characteristic. The temperature influence characteristic on the bolt reflects the degree of change of the actual temperature relative to the reference temperature and reflects the impact of temperature on the performance of the bolt. This is because an increase in temperature will reduce the mechanical properties of the bolt material, thereby accelerating the occurrence of damage.

[0034] The initial damage characteristics are obtained according to the stress hazard characteristics and the temperature impact characteristics of the bolt.

[0035] Optionally, the vibration information includes actual vibration frequency and vibration acceleration amplitude characteristics;

[0036] According to the ratio of the actual vibration frequency to the reference vibration frequency characteristic, the influence characteristic under the vibration frequency change is obtained, and the influence characteristic under the vibration frequency change reflects the degree of influence of the vibration frequency on the bolt damage. This is because the increase of the vibration frequency will cause the bolt to bear alternating stress, thereby accelerating the generation of fatigue damage;

[0037] Obtaining preliminary damage accumulation characteristics under the combined influence of the initial damage and the vibration frequency change according to the product of the influence characteristics under the vibration frequency change and the initial damage characteristics;

[0038] According to the ratio of the vibration acceleration amplitude characteristic to the reference vibration acceleration amplitude characteristic, an aggravated damage influence characteristic is obtained, where the aggravated damage influence characteristic reflects the effect of vibration intensity on bolt damage. A large vibration acceleration amplitude will subject the bolt to a greater impact force, thereby aggravating the accumulation of damage.

[0039] The damage accumulation feature is obtained according to the aggravated damage impact feature and the preliminary damage accumulation feature.

[0040] Optionally, based on the elastic modulus and the stress characteristic, an actual strain characteristic is obtained, specifically, ε is obtained according to a calculation formula of σ=Eε;

[0041] Obtaining a deformation deviation feature based on the actual strain feature and the reference strain feature. The deformation deviation feature reflects the degree of deviation of the current deformation of the bolt relative to the normal working state. A large strain means that the bolt is subjected to a greater external force, which will further shorten its service life.

[0042] The deformation deviation characteristic and the damage accumulation characteristic are multiplied to obtain a comprehensive life-influencing characteristic. The comprehensive life-influencing characteristic comprehensively considers the influence of the damage accumulation degree and the actual strain on the bolt life. The larger the value, the more serious the damage and deformation of the bolt, and the shorter the remaining life.

[0043] The remaining life characteristic is obtained according to the reference life characteristic and the comprehensive impact life characteristic.

[0044] Optionally, the data processing module collects all the remaining life characteristics of the same batch of bolt fasteners;

[0045] Adding all the remaining life characteristics to obtain a remaining life sum characteristic;

[0046] Divide the remaining life sum feature by the number of pieces in a batch feature to obtain the remaining life average feature;

[0047] The comparison results include:

[0048] If the average remaining life characteristic is lower than the reference life characteristic, it indicates that the life quality inspection is qualified;

[0049] If the average remaining life characteristic is equal to the reference life characteristic, it indicates that the life quality inspection is passed;

[0050] If the remaining life average characteristic is higher than the reference life characteristic, it indicates that the life quality inspection is unqualified, and the early warning module flashes a red warning light.

[0051] Optionally, the early warning module performs the following early warning on the sensor detection information:

[0052] When the actual room temperature characteristic is higher than the reference room temperature characteristic, the warning module flashes an orange warning light;

[0053] The actual vibration frequency is higher than the reference vibration frequency characteristic, and the early warning module flashes a yellow warning light;

[0054] If the actual strain characteristic is higher than the reference strain characteristic, the warning module flashes a blue warning light.

[0055] Compared with the prior art, the present invention has the following beneficial effects:

[0056] The data processing module of the present invention firstly introduces a combination of stress characteristics and temperature information, comprehensively considering the coupled effects of stress and temperature on the initial damage of the bolt clamping area. This approach can more accurately evaluate the initial damage characteristics of the bolt under different temperature and stress conditions.

[0057] Based on the initial damage characteristics, vibration information factors are further introduced, and combined with the reference vibration frequency characteristics and reference vibration acceleration amplitude characteristics, the damage accumulation characteristics are obtained. This method takes into account the interaction of multiple physical field factors. In actual operation, vibration will cause the bolts to undergo alternating stress and accelerate the accumulation of damage. The obtained damage accumulation characteristics can track and reflect the dynamic changes of this damage accumulation in real time, thereby improving the accuracy of life prediction.

[0058] The data processing module incorporates the actual strain characteristics obtained through elastic modulus and stress characteristics into the calculation of life prediction, taking into account the impact of actual strain on remaining life. The actual strain reflects the degree of deformation of the bolt and is closely related to the damage and life of the bolt.

[0059] In summary, this life prediction system for the clamped area of bolt fasteners comprehensively considers the coupling effect of multiple physical fields and can more accurately simulate the physical state changes of the clamped area of bolt fasteners under actual complex working conditions, thereby improving the accuracy of life prediction. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 This is the flow chart of the collection, acquisition and early warning display of the life prediction system of the clamped area of the bolt fastener;

[0061] Figure 2 It is a structural diagram of the data acquisition module in the present invention. DETAILED DESCRIPTION

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0063] Regarding the life prediction system of the clamped area of the bolt fastener, it is different from the existing life prediction system of the clamped area of the bolt fastener;

[0064] The existing life prediction system for the clamped area of bolt fasteners has problems such as insufficient consideration of single physical factors, lack of dynamic analysis of damage accumulation, and failure to consider the impact of actual strain on life.

[0065] This algorithm unit comprehensively considers multi-physical field factors and the impact of actual strain on life, thereby forming a complete life prediction system for the clamped area of bolt fasteners.

[0066] For example 1, please refer to Figures 1 to 2 ,This implementation provides a life prediction system for the clamped area of a bolt fastener, including a data acquisition module, a data processing module, an early warning module, and a result display module;

[0067] Data acquisition module: used for real-time sensing and detection of sensor detection information of the clamping area of the same batch of bolt fasteners;

[0068] The sensing detection information includes stress characteristics, temperature information and vibration information;

[0069] Data processing module: used to receive sensor detection information;

[0070] Extracting the material yield strength characteristic, elastic modulus, reference room temperature characteristic, reference vibration frequency characteristic, reference vibration acceleration amplitude characteristic, reference strain characteristic, and reference life characteristic that are preset and stored in the data processing module;

[0071] Obtain initial damage characteristics based on material yield strength characteristics, stress characteristics, reference room temperature characteristics and temperature information;

[0072] Obtain damage accumulation characteristics based on initial damage characteristics, reference vibration frequency characteristics, reference vibration acceleration amplitude characteristics and vibration information;

[0073] Obtain remaining life characteristics based on damage accumulation characteristics, elastic modulus, stress characteristics, reference strain characteristics and reference life characteristics;

[0074] The remaining life characteristics of the same batch of bolt fasteners are averaged to obtain the average remaining life characteristics and transmit them to the result display module;

[0075] Result display module: judges the life quality inspection result based on the comparison result of the remaining life average characteristics and the reference life characteristics, and displays the life quality inspection result and the remaining life average characteristics;

[0076] Early warning module: Receives and issues early warnings based on sensor detection information and life quality inspection results;

[0077] The equipment used in the data acquisition module includes strain gauges, temperature sensors, acceleration sensors and data acquisition instruments. The input end of the data acquisition instrument is connected to the output ends of the strain gauges, temperature sensors and acceleration sensors.

[0078] Strain gauge: used to obtain stress characteristics and transmit them to the data acquisition instrument;

[0079] Temperature sensor: used to obtain temperature information and transmit it to the data acquisition instrument;

[0080] Acceleration sensor: used to obtain vibration information and transmit it to the data acquisition instrument;

[0081] Data acquisition device: used to obtain stress characteristics, temperature information and vibration information, and transmit them to the data processing module;

[0082] The devices used by the data processing module include storage devices and computing devices;

[0083] Calculation equipment: used to obtain initial damage characteristics, damage accumulation characteristics, remaining life characteristics and remaining life average characteristics;

[0084] Storage device: used to receive and store sensor detection information, initial damage characteristics, damage accumulation characteristics, remaining life characteristics and remaining life average characteristics.

[0085] Stress, temperature, vibration, and strain-related characteristic information is collected through strain gauges, temperature sensors, and accelerometers. The information is then transmitted to the data processing module via a data acquisition instrument. The module then sequentially obtains the initial damage characteristics of the combined stress and temperature, the damage accumulation characteristics that improve damage accumulation by introducing vibration, and the remaining life characteristics predicted by combining damage accumulation with strain. The three are interrelated, enabling the system to accurately assess the damage status and remaining life of the bolt.

[0086] In addition, the average remaining life characteristics of the same batch of bolt fasteners obtained based on the remaining life characteristics will also provide a data basis for the life quality inspection results and will be displayed by the result display module.

[0087] See also Figure 1, the temperature information includes actual room temperature characteristics and temperature reference characteristics;

[0088] The fastener materials of the same batch of bolt fasteners include ordinary carbon steel and high temperature alloy;

[0089] Determine and obtain temperature reference characteristics based on fastener material;

[0090] Obtain stress hazard characteristics based on stress characteristics and material yield strength characteristics;

[0091] Obtain the temperature effect characteristics on the bolts based on the temperature reference characteristics, the actual room temperature characteristics and the reference room temperature characteristics;

[0092] Obtain initial damage characteristics based on stress hazard characteristics and temperature impact characteristics of bolts;

[0093] The calculation formula of the initial damage characteristic of this embodiment is as follows:

[0094] ;

[0095] ;

[0096] in:

[0097] S a is the initial damage characteristic reflecting the initial damage degree of the bolt clamped area, σ is the stress characteristic reflecting the actual stress borne by the bolt clamped area, and σ y is the material yield strength characteristic reflecting the yield strength of the bolt material, W is the actual room temperature characteristic reflecting the actual temperature when the bolt is working, W0 is the reference room temperature characteristic reflecting the reference temperature when the bolt is working, and W ref It is a temperature reference characteristic determined according to the characteristics of the material;

[0098] σ x is the axial tensile stress, t is the torsional shear stress;

[0099] Axial tensile stress σ x The strain ε is measured by attaching a strain gauge in the axial direction x , and then according to Hooke's law σ x =Eε x Calculation acquisition;

[0100] Where E is the elastic modulus;

[0101] The torsional shear stress t is obtained by measuring the torsion angle φ and calculating it based on the relationship between the torsional shear stress t and the torsion angle φ: t=Gφ;

[0102] Where G is the shear elastic modulus of the material.

[0103] In this embodiment, the actual stress characteristics of the bolt clamping area are based on the comprehensive consideration of the axial tensile stress σ x and the equivalent stress of torsional shear stress t;

[0104] In the bolt connection, the clamped area is also subjected to the axial tensile stress σ generated by the preload force. x As well as the torsional shear stress t generated under some existing torsional working conditions, the life prediction of the clamped area is carried out because this area is a stress concentrated and complex area, which is prone to fatigue crack damage and is a key area affecting the overall life of the bolt connection;

[0105] In the calculation of this embodiment, The result is the stress hazard characteristic, which reflects the ratio of actual stress to yield strength and reflects the influence of stress on damage.

[0106] The results are the characteristics of the temperature effect on the bolt, taking into account the promoting effect of temperature change on damage;

[0107] Depend on The initial damage characteristics S obtained a The larger the value, the greater the initial damage.

[0108] See also Figure 1 , vibration information includes the actual vibration frequency and vibration acceleration amplitude characteristics;

[0109] According to the constant 1 plus the ratio of the actual vibration frequency to the reference vibration frequency characteristics, the influence characteristics under the vibration frequency change are obtained;

[0110] According to the product of the impact characteristics and the initial damage characteristics under the vibration frequency change, the preliminary damage accumulation characteristics under the combined influence of the initial damage and the vibration frequency change are obtained;

[0111] According to the ratio of the vibration acceleration amplitude characteristic to the reference vibration acceleration amplitude characteristic, the aggravated damage influence characteristic is obtained;

[0112] Obtain damage accumulation characteristics based on the aggravated damage impact characteristics and the preliminary damage accumulation characteristics;

[0113] The calculation formula of the damage accumulation characteristic of this embodiment is as follows:

[0114] ;

[0115] in:

[0116] S abIn order to comprehensively consider the damage accumulation characteristics after stress, temperature and vibration, f is the actual vibration frequency reflecting the actual vibration frequency of the bolt during operation, f0 is the reference vibration frequency characteristic set according to the vibration frequency of normal operation of the equipment, A is the vibration acceleration amplitude characteristic reflecting the actual vibration acceleration amplitude of the bolt during operation, and A0 is the reference vibration acceleration amplitude characteristic reflecting the pre-set batch of bolt fasteners.

[0117] In the calculation of this embodiment, The result is the impact characteristic under the change of vibration frequency, which reflects the influence of the change of actual vibration frequency relative to the reference vibration frequency on damage accumulation;

[0118] The result is the preliminary characteristic of damage accumulation, which reflects the combined effect of initial damage and vibration frequency change;

[0119] The result is an aggravated damage effect characteristic, which reflects the effect of the change of the actual vibration acceleration amplitude relative to the reference value on the damage.

[0120] See also Figure 1 , based on the elastic modulus and stress characteristics, the actual strain characteristics are obtained;

[0121] Obtain deformation deviation characteristics based on actual strain characteristics and reference strain characteristics;

[0122] Multiply the deformation deviation feature and the damage accumulation feature to obtain the comprehensive impact life feature;

[0123] Obtain the remaining life characteristics based on the reference life characteristics and the comprehensive impact life characteristics.

[0124] The calculation formula for the remaining life characteristic is as follows:

[0125] ;

[0126] in:

[0127] T is the remaining life characteristic reflecting the remaining life of the clamped area of the bolt fastener, T0 is the reference life characteristic reflecting the preset batch of bolt fasteners, ε is the actual strain characteristic of the bolt in operation, and ε0 is the reference strain characteristic reflecting the preset batch of bolt fasteners.

[0128] In the calculation of this embodiment, The result is the deformation deviation characteristic, which takes into account the effect of the change of actual strain relative to the reference strain on the life;

[0129] The result is a comprehensive life-influencing feature, which combines the effects of damage accumulation and actual strain on bolt life. The larger the result, the more serious the damage and deformation of the bolt, and the shorter the remaining life.

[0130] For example 2, please refer to Figures 1 to 2 ,The data processing module collects all the remaining life characteristics of the same batch of bolt fasteners;

[0131] Add up all remaining life features to obtain the remaining life sum feature;

[0132] Divide the remaining life sum feature by the number of pieces in the batch feature to obtain the remaining life average feature;

[0133] The comparison results include:

[0134] If the average remaining life characteristic is lower than the reference life characteristic, it means that the life quality inspection is qualified;

[0135] If the average remaining life characteristics are equal to the reference life characteristics, it means that the life quality inspection is qualified;

[0136] If the average remaining life characteristic is higher than the reference life characteristic, it means that the life quality inspection fails, and the early warning module flashes a red warning light;

[0137] The early warning module's early warning performance for sensor detection information is as follows:

[0138] If the actual room temperature characteristic is higher than the reference room temperature characteristic, the warning module flashes an orange warning light;

[0139] If the actual vibration frequency is higher than the reference vibration frequency characteristic, the warning module will flash a yellow warning light;

[0140] If the actual strain characteristic is higher than the reference strain characteristic, the warning module will flash a blue warning light.

[0141] In this embodiment, by real-time monitoring and early warning of the average remaining life, actual room temperature characteristics, actual vibration frequency and actual strain characteristics, potential risks can be detected before the bolts are seriously damaged or fail. Since bolt failure will trigger a series of chain reactions, affecting the normal operation of other parts of the equipment, the timely early warning of the early warning module can prevent the occurrence of such chain reactions and reduce equipment maintenance costs and downtime.

[0142] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A system for predicting the life of the clamped area of a bolt fastener, characterized in that: It includes data acquisition module, data processing module, early warning module and result display module; The data acquisition module is used for real-time sensing and detecting the sensing detection information of the clamping area of the same batch of bolt fasteners; The sensing detection information includes stress characteristics, temperature information and vibration information; The data processing module is used to receive the sensor detection information; Extracting the material yield strength characteristic, elastic modulus, reference room temperature characteristic, reference vibration frequency characteristic, reference vibration acceleration amplitude characteristic, reference strain characteristic, and reference life characteristic that are preset and stored in the data processing module; Acquiring initial damage characteristics according to the material yield strength characteristics, the stress characteristics, the reference room temperature characteristics, and the temperature information; Acquire a damage accumulation feature according to the initial damage feature, the reference vibration frequency feature, the reference vibration acceleration amplitude feature, and the vibration information; Obtaining a remaining life feature according to the damage accumulation feature, the elastic modulus, the stress feature, the reference strain feature, and the reference life feature; Averaging the remaining life characteristics of the same batch of bolt fasteners to obtain an average remaining life characteristic, and transmitting the average remaining life characteristic to the result display module; The result display module is configured to determine a life quality inspection result based on a comparison result between the remaining life average characteristic and the reference life characteristic, and to display the life quality inspection result and the remaining life average characteristic; The early warning module receives and issues an early warning for the sensor detection information and the life quality inspection result.

2. A system for predicting the life of the clamped area of a bolt fastener according to claim 1, characterized in that: The equipment used in the data acquisition module includes a strain gauge, a temperature sensor, an acceleration sensor and a data acquisition instrument, and the input end of the data acquisition instrument is connected to the output ends of the strain gauge, the temperature sensor and the acceleration sensor; The strain gauge is used to obtain the stress characteristics and transmit them to the data acquisition instrument; The temperature sensor is used to obtain the temperature information and transmit it to the data acquisition instrument; The acceleration sensor is used to obtain the vibration information and transmit it to the data acquisition instrument; The data acquisition instrument is used to obtain the stress characteristics, the temperature information and the vibration information, and transmit them to the data processing module.

3. The system for predicting the life of the clamped area of a bolt fastener according to claim 2, characterized in that: The devices used by the data processing module include storage devices and computing devices; The computing device is configured to obtain the initial damage characteristic, the damage accumulation characteristic, the remaining life characteristic, and the remaining life average characteristic; The storage device is used to receive and store the sensing detection information, the initial damage characteristics, the damage accumulation characteristics, the remaining life characteristics and the remaining life average characteristics.

4. The system for predicting the life of the clamped area of a bolt fastener according to claim 3, characterized in that: The temperature information includes actual room temperature characteristics and temperature reference characteristics; The fastener materials of the same batch of bolt fasteners include ordinary carbon steel and high-temperature alloy; Determining and obtaining the temperature reference characteristic based on the fastener material; Obtaining stress hazard characteristics according to the stress characteristics and the material yield strength characteristics; Acquire a characteristic of temperature influence on a bolt according to the temperature reference characteristic, the actual room temperature characteristic, and the reference room temperature characteristic; Obtaining the initial damage characteristics according to the stress hazard characteristics and the temperature impact characteristics of the bolt; The vibration information includes actual vibration frequency and vibration acceleration amplitude characteristics; Obtaining an impact characteristic under a vibration frequency change according to a ratio of the actual vibration frequency to the reference vibration frequency characteristic; Obtaining a preliminary damage accumulation feature according to the product of the impact feature under the vibration frequency change and the initial damage feature; obtaining a damage aggravation impact feature according to a ratio of the vibration acceleration amplitude feature to the reference vibration acceleration amplitude feature; The damage accumulation feature is obtained according to the aggravated damage impact feature and the preliminary damage accumulation feature.

5. The system for predicting the life of the clamped area of a bolt fastener according to claim 4, characterized in that: obtaining an actual strain characteristic based on the elastic modulus and the stress characteristic; A deformation deviation feature is obtained according to the actual strain feature and the reference strain feature.

6. The system for predicting the life of the clamped area of a bolt fastener according to claim 5, characterized in that: Multiplying the deformation deviation feature and the damage accumulation feature to obtain a comprehensive life-influencing feature; The remaining life characteristic is obtained according to the reference life characteristic and the comprehensive impact life characteristic.

7. The system for predicting the life of the clamped area of a bolt fastener according to claim 6, characterized in that: The data processing module collects all the remaining life characteristics of the same batch of bolt fasteners; Adding all the remaining life characteristics to obtain a remaining life sum characteristic; Divide the remaining life sum feature by the number of pieces in a batch feature to obtain the remaining life average feature; The comparison results include: If the average remaining life characteristic is lower than the reference life characteristic, it indicates that the life quality inspection fails; If the average remaining life characteristic is equal to the reference life characteristic, it indicates that the life quality inspection is passed; If the average remaining life characteristic is higher than the reference life characteristic, it indicates that the life quality inspection is qualified, and the early warning module flashes a red warning light.

8. The system for predicting the life of the clamped area of a bolt fastener according to claim 6, characterized in that: The early warning module performs the following actions on the sensor detection information: When the actual room temperature characteristic is higher than the reference room temperature characteristic, the warning module flashes an orange warning light; The actual vibration frequency is higher than the reference vibration frequency characteristic, and the early warning module flashes a yellow warning light; If the actual strain characteristic is higher than the reference strain characteristic, the warning module flashes a blue warning light.

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