Bolt fastener clamped area service life prediction system

Abstract

The invention discloses a bolt fastener clamped area service life prediction system, and relates to the technical field of bolt fastener service life prediction, the bolt fastener clamped area service life prediction 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 sensing and detecting sensing detection information of a same batch of bolt fastener clamped areas in real time, and the data processing module is used for processing the sensing detection information; the data processing module is used for acquiring initial damage characteristics, damage accumulation characteristics, residual life characteristics and residual life average characteristics, and the result display module judges a life quality inspection result according to a comparison result of the residual life average characteristics and reference life characteristics and displays the life quality inspection result and the residual life average characteristics. According to the method, the coupling influence of stress and temperature on the initial damage of the clamped area of the bolt is considered, a vibration factor is introduced, damage accumulation is associated with the design life of the bolt and actual strain, and a complete circulation system from initial damage evaluation to comprehensive damage accumulation to life prediction is formed.

Description

Technical Field

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

[0002] In the fields of industrial production and machinery manufacturing, bolt fasteners, as a common connecting component, are widely used in various equipment and structures. The life of the clamped area of the bolt is directly related to the reliability and safety of the entire equipment. For example, in the aerospace, automotive manufacturing, and power equipment industries, the failure of bolts can lead to serious accidents and economic losses. Therefore, accurately predicting the life of the clamped area of bolt fasteners has important practical significance.

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

[0004] In actual operation, the damage of bolts is a gradually cumulative process, continuously affected by various factors such as stress, temperature, and vibration, but it is difficult for existing technologies to track and reflect the dynamic changes of this damage accumulation in real time.

[0005] When predicting the life using existing technologies, the actual strain situation of bolts during operation is often not fully considered. The actual strain reflects the deformation degree of bolts and is closely related to the damage and life of bolts. If the influence of actual strain is ignored, there will be a large deviation between the life prediction result and 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 bolt fasteners, which solves the problems raised in the above background art.

[0007] To achieve the above 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; The data acquisition module: is used for real-time sensing and detecting the sensing detection information of the clamped areas 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 for receiving the sensing detection information; extracting 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 that are preset and stored in the data processing module; Among them, for the same batch of bolt fasteners with standard specifications, 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 according to the technical data provided by the bolt manufacturer; According to the material yield strength characteristics, the stress characteristics, the reference room temperature characteristics, and the temperature information, initial damage characteristics are obtained; According to the initial damage characteristics, the reference vibration frequency characteristics, the reference vibration acceleration amplitude characteristics, and the vibration information, damage accumulation characteristics are obtained; According to the damage accumulation characteristics, the elastic modulus, the stress characteristics, the reference strain characteristics, and the reference life characteristics, remaining life characteristics are obtained; The remaining life characteristics of the same batch of bolt fasteners are averaged to obtain the average remaining life characteristics, which are then transmitted to the result display module; The result display module: Judging the life quality inspection result according to the comparison result between the average remaining life characteristics and the reference life characteristics, and displaying the life quality inspection result and the average remaining life characteristics; The warning module: Receiving and warning about the sensing detection information and the life quality inspection result.

[0008] Optionally, the devices used by the data acquisition module include 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, the temperature sensors, and the acceleration sensors; The strain gauge: Used to obtain the stress characteristics and transmit them to the data acquisition instrument; The temperature sensor: Used to obtain the temperature information and transmit it to the data acquisition instrument; The acceleration sensor: Used to obtain the vibration information and transmit it to the data acquisition instrument; The data acquisition instrument: Used to obtain the stress characteristics, the temperature information, and the vibration information, and transmit them to the data processing module.

[0009] Optionally, the devices used by the data processing module include storage devices and computing devices; The computing device: Used to obtain the initial damage characteristics, the damage accumulation characteristics, the remaining life characteristics, and the average remaining life characteristics; The storage device: Used to receive and store the sensing detection information, the initial damage characteristics, the damage accumulation characteristics, the remaining life characteristics, and the average remaining life characteristics.

[0010] Optionally, the temperature information includes an actual room temperature feature and a temperature reference feature; The fastener materials of the same batch of bolt fasteners include ordinary carbon steel and superalloy; Determine and obtain the temperature reference feature according to the fastener material; If it is ordinary carbon steel, the temperature reference feature is 80K - 120K; If it is superalloy, the temperature reference feature is 150K - 200K; According to the stress feature and the material yield strength feature, obtain the stress - bearing risk feature. The stress - bearing risk feature reflects the ratio of the stress actually borne by the bolt to its material yield strength, reflecting the degree of risk of the stress currently borne by the bolt. If this value is close to or greater than 1, it means that the stress borne by the bolt is close to or exceeds its yield limit and is prone to plastic deformation; According to the temperature reference feature, the actual room temperature feature and the reference room temperature feature, obtain the temperature influence feature on the bolt. The temperature influence feature on the bolt reflects the degree of change of the actual temperature relative to the reference temperature, reflecting the influence of temperature on the performance of the bolt. This is because an increase in temperature will cause the mechanical properties of the bolt material to decline, thereby accelerating the generation of damage; According to the stress - bearing risk feature and the temperature influence feature on the bolt, obtain the initial damage feature.

[0011] Optionally, the vibration information includes an actual vibration frequency and a vibration acceleration amplitude feature; According to the ratio of the actual vibration frequency to the reference vibration frequency feature, obtain the influence feature under vibration frequency change. The influence feature under vibration frequency change reflects the degree of influence of vibration frequency on bolt damage. This is because an increase in vibration frequency will cause the bolt to bear alternating stress, thereby accelerating the generation of fatigue damage; According to the product of the influence feature under vibration frequency change and the initial damage feature, obtain the preliminary damage accumulation feature under the combined influence of initial damage and vibration frequency change; According to the ratio of the vibration acceleration amplitude feature to the reference vibration acceleration amplitude feature, obtain the aggravated damage influence feature. The aggravated damage influence feature reflects the influence of vibration intensity on bolt damage. A large vibration acceleration amplitude will cause the bolt to receive a greater impact force, thereby accelerating the accumulation of damage; According to the aggravated damage influence feature and the preliminary damage accumulation feature, obtain the damage accumulation feature.

[0012] Optionally, based on the elastic modulus and the stress feature, obtain the actual strain feature. Specifically, according to the calculation formula of σ = Eε, obtain ε; Based on the actual strain characteristics and the reference strain characteristics, a deformation deviation characteristic is obtained. The deformation deviation characteristic reflects the degree of deviation of the current deformation of the bolt from 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; Multiply the deformation deviation characteristic and the damage accumulation characteristic to obtain a comprehensive life influence characteristic. The comprehensive life influence characteristic combines the degree of damage accumulation and the influence of actual strain on the bolt life. The larger its value, the more serious the damage and deformation of the bolt, and the shorter the remaining life; Based on the reference life characteristic and the comprehensive life influence characteristic, the remaining life characteristic is obtained.

[0013] Optionally, the data processing module collects all the remaining life characteristics of the same batch of bolt fasteners; Add all the remaining life characteristics to obtain a total remaining life characteristic; Divide the total remaining life characteristic by the number-of-pieces characteristic within the batch to obtain the average remaining life characteristic; The comparison results include: If the average remaining life characteristic is lower than the reference life characteristic, it reflects that the life quality inspection is qualified; If the average remaining life characteristic is equal to the reference life characteristic, it reflects that the life quality inspection is qualified; If the average remaining life characteristic is higher than the reference life characteristic, it reflects that the life quality inspection is unqualified, and the warning module flashes a red warning light.

[0014] Optionally, the warning performance of the warning module for the sensing detection information is specifically as follows: If the actual room temperature characteristic is higher than the reference room temperature characteristic, the warning module flashes an orange warning light; If the actual vibration frequency is higher than the reference vibration frequency characteristic, the 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.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The data processing module of the present invention first comprehensively considers the coupling effect of stress and temperature on the initial damage of the bolt clamping area by introducing the combination of stress characteristics and temperature information. This method can more accurately evaluate the initial damage characteristics of the bolt under different temperature and stress conditions.

[0016] Based on the initial damage characteristics, the vibration information factor is further introduced, and combined with the reference vibration frequency characteristics and the reference vibration acceleration amplitude characteristics, the damage accumulation characteristics are obtained. This method takes into account the interaction of multi-physical field factors. In actual operation, vibration will cause the bolt to bear alternating stress, accelerating the accumulation of damage, and the obtained damage accumulation characteristics can track and reflect the dynamic changes of this damage accumulation in real time, improving the accuracy of life prediction.

[0017] The data processing module incorporates the actual strain characteristics obtained through the elastic modulus and stress characteristics into the calculation of life prediction, considering the influence of actual strain on the 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.

[0018] In summary, the life prediction system for the clamped area of this bolt fastener comprehensively considers the coupling effect of multi-physical fields, can more accurately simulate the physical state changes in the clamped area of the bolt fastener under actual complex working conditions, and thus improves the accuracy of life prediction. Brief Description of the Drawings

[0019] Figure 1 It is the acquisition, obtaining, and warning display flowcharts of the life prediction system for the clamped area of this bolt fastener; Figure 2 It is the structural schematic diagram of the data acquisition module in the present invention. Specific Embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Regarding the life prediction system for the clamped area of this bolt fastener, it is different from the existing life prediction systems for the clamped area of bolt fasteners; The existing life prediction systems for the clamped area of bolt fasteners have problems such as insufficient consideration of single physical factors, lack of dynamic analysis of damage accumulation, and failure to consider the influence of actual strain on life; And this algorithm unit comprehensively considers multi-physical field factors and the influence of actual strain on life, and thus forms a complete life prediction system for the clamped area of bolt fasteners.

[0022] Example 1, please refer to Figures 1 to 2 , this embodiment 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; Data acquisition module: used to sense and detect in real time the sensing detection information of the clamped areas of the same batch of bolt fasteners; The sensing detection information includes stress characteristics, temperature information, and vibration information; Data processing module: used to receive the sensing detection information; Extract 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 that are preset and stored in the data processing module; Obtain the initial damage characteristics based on the material yield strength characteristics, stress characteristics, reference room temperature characteristics, and temperature information; Obtain the damage accumulation characteristics based on the initial damage characteristics, reference vibration frequency characteristics, reference vibration acceleration amplitude characteristics, and vibration information; Obtain the remaining life characteristics based on the damage accumulation characteristics, elastic modulus, stress characteristics, reference strain characteristics, and reference life characteristics; Average the remaining life characteristics of the same batch of bolt fasteners to obtain the average remaining life characteristics and transmit them to the result display module; Result display module: Judge the life quality inspection result based on the comparison result between the average remaining life characteristics and the reference life characteristics, and display the life quality inspection result and the average remaining life characteristics; Early warning module: Receive and give early warnings to the sensing detection information and the life quality inspection result; The devices used in the data acquisition module include 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; Strain gauge: used to obtain stress characteristics and transmit them to the data acquisition instrument; Temperature sensor: used to obtain temperature information and transmit them to the data acquisition instrument; Acceleration sensor: used to obtain vibration information and transmit them to the data acquisition instrument; Data acquisition instrument: used to obtain stress characteristics, temperature information, and vibration information and transmit them to the data processing module; The devices used in the data processing module include storage devices and computing devices; Computing device: used to obtain the initial damage characteristics, damage accumulation characteristics, remaining life characteristics, and average remaining life characteristics; Storage device: used to receive and store the sensing detection information, initial damage characteristics, damage accumulation characteristics, remaining life characteristics, and average remaining life characteristics.

[0023] Collect stress, temperature, vibration, and strain-related characteristic information through strain gauges, temperature sensors, and acceleration sensors. Transmit it to the data processing module via a data acquisition instrument, and sequentially obtain the initial damage characteristics of comprehensive stress and temperature, the damage accumulation characteristics that introduce vibration to improve damage accumulation, and the remaining life characteristics predicted by combining damage accumulation and strain. The three are interrelated, enabling the system to accurately evaluate the bolt damage state and remaining life; 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 of the life quality inspection results and be displayed by the result display module.

[0024] Please refer to Figure 1 , the temperature information includes the actual room temperature characteristics and temperature reference characteristics; The fastener materials of the same batch of bolt fasteners include ordinary carbon steel and superalloy; Determine and obtain the temperature reference characteristics according to the fastener materials; Obtain the stress risk characteristics according to the stress characteristics and material yield strength characteristics; Obtain the characteristics of the influence of temperature on the bolt according to the temperature reference characteristics, actual room temperature characteristics, and reference room temperature characteristics; Obtain the initial damage characteristics according to the stress risk characteristics and the characteristics of the influence of temperature on the bolt; The calculation formula for the initial damage characteristics of this embodiment is as follows: ; ; Where: S a is the initial damage characteristic reflecting the initial damage degree of the bolt clamping area, σ is the stress characteristic reflecting the actual stress borne by the bolt clamping area, 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 during the bolt operation, W 0 is the reference room temperature characteristic reflecting the reference temperature during the bolt operation, W ref is the temperature reference characteristic determined according to the characteristics of the material; σ x is the axial tensile stress, and t is the torsional shear stress; The axial tensile stress σ x is measured by pasting a strain gauge in the axial direction to measure the strain ε x , and then calculated and obtained according to Hooke's law σ x =Eε x ; where E is the elastic modulus; The torsional shear stress τ is obtained by measuring the torsional angle φ and combining it with the relationship between the torsional shear stress τ and the torsional angle φ: τ = Gφ. Where G is the shear modulus of elasticity of the material.

[0025] In this embodiment, the stress characteristics actually borne by the bolt clamping area are the equivalent stress comprehensively considering the axial tensile stress σ x and the torsional shear stress τ. In bolt connections, the clamping area is simultaneously subjected to the axial tensile stress σ generated by the pre-tightening force x and the torsional shear stress τ generated under some existing torsional working conditions. Life prediction of the clamping area is because this area is a stress concentration and complex part, prone to fatigue crack damage, and is a key area affecting the overall life of bolt connections. In the calculation of this embodiment, The result of is the stress hazard characteristic, which reflects the ratio of the actual stress to the yield strength and embodies the degree of influence of the stress on damage. The result of is the influence characteristic of temperature on the bolt, considering the promoting effect of temperature change on damage. From The initial damage characteristic S obtained a The larger the value, the greater the degree of initial damage.

[0026] Please refer to Figure 1 , the vibration information includes the actual vibration frequency and the vibration acceleration amplitude characteristic. According to the constant 1 plus the ratio of the actual vibration frequency to the reference vibration frequency characteristic, the influence characteristic under the change of vibration frequency is obtained. According to the product of the influence characteristic under the change of vibration frequency and the initial damage characteristic, the preliminary damage accumulation characteristic under the combined influence of the initial damage and the change of vibration frequency is obtained. According to the ratio of the vibration acceleration amplitude characteristic to the reference vibration acceleration amplitude characteristic, the influence characteristic of aggravating damage is obtained. According to the influence characteristic of aggravating damage and the preliminary damage accumulation characteristic, the damage accumulation characteristic is obtained. The calculation formula of the damage accumulation characteristic in this embodiment is as follows: ; Where: S ab is the damage accumulation characteristic after comprehensively considering stress, temperature and vibration. f is the actual vibration frequency reflecting the actual vibration frequency of the bolt during operation, f 0 is the reference vibration frequency characteristic set according to the normal operation vibration frequency of the equipment. A is the vibration acceleration amplitude characteristic reflecting the actual vibration acceleration amplitude of the bolt during operation, A 0To reflect the reference vibration acceleration amplitude characteristics of this batch of bolt fasteners preset in advance.

[0027] In the calculation of this embodiment, the result of is the influence characteristic under the change of vibration frequency, reflecting the influence of the change of the actual vibration frequency relative to the reference vibration frequency on damage accumulation; the result of is the preliminary damage accumulation characteristic, reflecting the combined influence of the initial damage and the change of vibration frequency; the result of is the characteristic of aggravating damage influence, reflecting the effect of the change of the actual vibration acceleration amplitude relative to the reference value on damage.

[0028] Please refer to Figure 1 , and based on the elastic modulus and stress characteristics, obtain the actual strain characteristics; According to the actual strain characteristics and the reference strain characteristics, obtain the deformation deviation characteristics; Multiply the deformation deviation characteristics and the damage accumulation characteristics to obtain the comprehensive influence on life characteristics; According to the reference life characteristics and the comprehensive influence on life characteristics, obtain the remaining life characteristics.

[0029] The calculation formula of the remaining life characteristics is as follows: ; Where: T is the remaining life characteristic reflecting the remaining life of the clamped area of the bolt fastener, T 0 is the reference life characteristic reflecting the preset of this batch of bolt fasteners, ε is the actual strain characteristic of the bolt during operation, ε 0 is the reference strain characteristic reflecting the preset of this batch of bolt fasteners.

[0030] In the calculation of this embodiment, the result of is the deformation deviation characteristic, which considers the influence of the change of the actual strain relative to the reference strain on life; the result of is the comprehensive influence on life characteristic, which synthesizes the influence of the damage accumulation degree and the actual strain on the bolt life. The larger the result, the more serious the damage and deformation of the bolt, and the shorter the remaining life.

[0031] Embodiment 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; Add up all the remaining life characteristics to obtain the total remaining life characteristic; Divide the total remaining life characteristic by the number of parts in the batch characteristic to obtain the average remaining life characteristic; The comparison results include: If the average remaining life characteristic is lower than the reference life characteristic, it indicates that the life quality inspection is qualified; If the average remaining life characteristic is equal to the reference life characteristic, it indicates that the life quality inspection is qualified; If the average remaining life characteristic is higher than the reference life characteristic, it indicates that the life quality inspection is unqualified, and the warning module flashes a red warning light; The warning performance of the warning module for the sensed detection information is specifically as follows: If the actual room temperature characteristic is higher than the reference room temperature characteristic, the warning module flashes an orange warning light; If the actual vibration frequency is higher than the reference vibration frequency characteristic, the 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.

[0032] In this embodiment, by real-time monitoring and warning of the average remaining life, actual room temperature characteristic, actual vibration frequency, and actual strain characteristic, potential risks can be detected before the bolt appears seriously damaged and fails. Since bolt failure will trigger a series of chain reactions and affect the normal operation of other components of the equipment, the timely warning of the warning module can prevent the occurrence of such chain reactions and reduce the equipment maintenance cost and downtime.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for predicting the life of a 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 detection of sensor 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 feature, elastic modulus, reference room temperature feature, reference vibration frequency feature, reference vibration acceleration amplitude feature, reference strain feature and reference life feature 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; Acquire 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 the average remaining life characteristics, and transmitting them to the result display module; The result display module determines the life quality inspection result according to the comparison result of the remaining life average characteristic and the reference life characteristic, and displays 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 bolt fastener clamping area life prediction system 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. A system for predicting the life of a 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 used to obtain the initial damage feature, the damage accumulation feature, the remaining life feature and the remaining life average feature; 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. A system for predicting the life of a 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 acquiring the temperature reference characteristic according to the fastener material; Obtaining stress hazard characteristics according to the stress characteristics and the material yield strength characteristics; Acquire a characteristic of the influence of temperature on the bolt according to the temperature reference characteristic, the actual room temperature characteristic and the reference room temperature characteristic; Acquire the initial damage characteristics according to the stress danger characteristics and the temperature influence characteristics on the bolt; The vibration information includes actual vibration frequency and vibration acceleration amplitude characteristics; Acquiring the influence characteristics under the vibration frequency change according to the ratio of the actual vibration frequency to the reference vibration frequency characteristics; Obtaining preliminary damage accumulation characteristics according to the product of the impact characteristics under the vibration frequency change and the initial damage characteristics; Obtaining a damage aggravation influence 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. A system for predicting the life of a clamped area of ​​a bolt fastener according to claim 4, characterized in that: Based on the elastic modulus and the stress characteristic, obtaining an actual strain characteristic; A deformation deviation feature is acquired according to the actual strain feature and the reference strain feature.

6. A bolt fastener clamping area life prediction system 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. A system for predicting the life of a 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 remaining life average characteristic is lower than the reference life characteristic, it means that the life quality inspection is qualified; If the remaining life average characteristic is equal to the reference life characteristic, it means that the life quality inspection is qualified; 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.

8. A system for predicting the life of a clamped area of ​​a bolt fastener according to claim 6, characterized in that: The performance of the early warning module for the sensor detection information is as follows: The actual room temperature characteristic is higher than the reference room temperature characteristic, and the early 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; The actual strain characteristic is higher than the reference strain characteristic, and the early warning module flashes a blue warning light.

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