CN108593233A - Fatigue strength measuring apparatus and system - Google Patents

Fatigue strength measuring apparatus and system Download PDF

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Publication number
CN108593233A
CN108593233A CN201810351030.5A CN201810351030A CN108593233A CN 108593233 A CN108593233 A CN 108593233A CN 201810351030 A CN201810351030 A CN 201810351030A CN 108593233 A CN108593233 A CN 108593233A
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China
Prior art keywords
fastener
exciting
tested
fatigue strength
power
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CN201810351030.5A
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Chinese (zh)
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CN108593233B (en
Inventor
赵才友
王平
卢俊
胡鑫
韦凯
肖杰灵
陈嵘
于中玲
孙旭
王刘翀
邢梦婷
高俊超
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Southwest Jiaotong University
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Southwest Jiaotong University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00Vibration-testing of structures; Shock-testing of structures

Abstract

A kind of fatigue strength measuring apparatus of present invention offer and system, the equipment include collecting unit, exciting unit and measuring unit;Exciting unit includes gimballed base, supporting tool, exciting device and leads power part, supporting tool is oppositely disposed at exciting device on gimballed base, and it is mutually permanently connected by leading power part, the fastener to be tested being installed on supporting tool is contacted with power part is led, and exciting device applies exciting force via power part is led to fastener to be tested;Collecting unit is arranged on fastener to be tested, is acquired for the vibratory response data to the fastener to be tested;Measuring unit is electrically connected with collecting unit and exciting device respectively, it is controlled for the working condition to collecting unit and exciting device, and the fatigue strength of fastener to be tested is calculated according to collected vibratory response data, obtain corresponding fatigue strength information.The device measuring accuracy is high, and measurement efficiency is high, can reduce the consumption of human resources.

Description

Fatigue strength measuring apparatus and system
Technical field
The present invention relates to fatigue strength field of measuring technique, in particular to a kind of fatigue strength measuring apparatus and are System.
Background technology
Rail track is the vehicles critically important in modern society, its safety and the life of the people are closely bound up, But under the action of Train induced load on rail track, it is tired that the crucial fastener of rail track middle orbit structure usually will appear high frequency Labor fracture failure phenomenon.And along with the failure of fastener, the dynamic response between train and rail will deteriorate, and fastener Also fracture is flown out during train operation and smashes Train Parts, seriously threatens the normal operation of train.Therefore to rail The fatigue strength of crucial fastener, which measures, in road structure becomes as a particularly important problem.
Currently, the fatigue strength that industry major flow carrys out contacting piece frequently with the mode of manual measurement measures, but it is this The accuracy of measurement of testing scheme is not high, and measurement efficiency is low, and needing to expend a large amount of human resources can realize that fatigue strength is surveyed Amount.
Invention content
In order to overcome above-mentioned deficiency in the prior art, the purpose of the present invention is to provide a kind of fatigue strength measuring apparatus And system, the fatigue strength measuring apparatus accuracy of measurement is high, and measurement efficiency is high, can reduce the consumption of human resources.
For equipment, preferred embodiments of the present invention provide a kind of fatigue strength measuring apparatus, and the fatigue strength is surveyed It includes collecting unit, exciting unit and measuring unit to measure equipment;
The exciting unit includes gimballed base, supporting tool, exciting device and leads power part, the supporting tool with it is described Exciting device is oppositely disposed on the gimballed base, and is led power part described in and be mutually permanently connected, wherein the support For installing fastener to be tested, the fastener to be tested being installed on the supporting tool contacts tooling with the power of the leading part, described Exciting device applies exciting force via the power of the leading part to the fastener to be tested;
The collecting unit is arranged on the fastener to be tested, after to applying exciting force via the exciting unit The vibratory response data of the fastener to be tested be acquired;
The measuring unit is electrically connected with the exciting device in the collecting unit and the exciting unit respectively, is used for The working condition of the collecting unit and the exciting device is controlled, and according to the collected vibration of the collecting unit Response data calculates the fatigue strength of the fastener to be tested, obtains corresponding fatigue strength information.
In preferred embodiments of the present invention, above-mentioned exciting device includes shake table and for carrying shaking for the shake table Dynamic sewing platform base;
The vibration sewing platform base is fixed on the gimballed base, the shake table being carried on the vibration sewing platform base For generating exciting force, the power of the leading part contacts with each other with the shake table, and by bolt and the shake table and described shakes Dynamic sewing platform base is fixedly connected, and the exciting force that the shake table generates is conducted to the fastener to be tested.
In preferred embodiments of the present invention, above-mentioned shake table includes horizontal sliding table and the moving-coil knot for generating exciting force Structure;
The horizontal sliding table is fixedly connected with the moving-coil structure, and respectively with the power of the leading part and the vibration sewing platform base It is bolted, so that the exciting force that the moving-coil structure generates is conducted to institute via the horizontal sliding table and the power of the leading part State fastener to be tested.
In preferred embodiments of the present invention, above-mentioned vibration sewing platform base includes moving-coil pedestal and slide unit pedestal;
The side of the moving-coil pedestal contacts and fixes with the gimballed base, far from the balance on the moving-coil pedestal The other side of pedestal is contacted with the moving-coil structure, to be carried to the moving-coil structure;
The other side far from the gimballed base is also fixedly connected with the slide unit pedestal on the moving-coil pedestal, so that institute The horizontal sliding table for stating moving-coil structure connection contacts with each other with the slide unit pedestal, and by bolt and the slide unit pedestal and The power of the leading part is fixed.
In preferred embodiments of the present invention, the above-mentioned power of leading part includes switching tooling and leads power plate;
The power of the leading plate is contacted and is fixed with the horizontal sliding table, the switching tooling by bolt respectively with the support Tooling and the power of the leading plate are fixedly connected, the switching tooling and the fastener phase mutual connection to be tested being installed on the supporting tool It touches, the exciting force conducted via the horizontal sliding table is led power plate described in be applied on the fastener to be tested.
In preferred embodiments of the present invention, above-mentioned switching tooling be rectangular parallelepiped structure, the side of the switching tooling with The top of the supporting tool is fixedly connected, the other side on the switching tooling far from the supporting tool and the power of the leading plate One side be fixedly connected, also contact and consolidate with the horizontal sliding table with the fixed side of the switching tooling on the power of the leading plate It is fixed.
In preferred embodiments of the present invention, above-mentioned vibratory response data include vibration acceleration data and stress variation number According to the collecting unit includes multiple three-dimensional acceleration transducers and multiple three-dimensional foil gauges;
The multiple three-dimensional acceleration transducer is separately positioned on big each of vibratory response amplitude on the fastener to be tested At position, for the fastener to be tested, the vibration acceleration data of corresponding position to be adopted under corresponding exciting force effect Collection;
The multiple three-dimensional foil gauge is separately positioned on the position that the fastener upper stress variation to be tested is concentrated, and uses In to the fastener to be tested, the stress variation data of corresponding position are acquired under corresponding exciting force effect.
In preferred embodiments of the present invention, above-mentioned measuring unit includes control module and computing module;
The control module is electrically connected with the exciting device in the collecting unit and the exciting unit respectively, is used for It controls the exciting device and exciting force, and/or the control collecting unit is applied to applying exciting force to the fastener to be tested The vibratory response data of the fastener to be tested afterwards are acquired;
The control module is also electrically connected with the computing module, for being waited for what is got via the collecting unit The vibratory response data of test fastener are sent to the computing module, so that the computing module is according to the vibratory response data The fatigue strength of the fastener to be tested is calculated.
In preferred embodiments of the present invention, above-mentioned fastener to be tested is elastic bar fastener, and the elastic bar fastener includes W type bullets Any one in item and E type springs.
For system, preferred embodiments of the present invention provide a kind of fatigue strength measuring system, and the fatigue strength is surveyed Amount system includes power supply unit and above-mentioned fatigue strength measuring apparatus, the power supply unit and the fatigue strength measuring apparatus It is electrically connected, for providing electric energy to the fatigue strength measuring apparatus, so that the fatigue strength measuring apparatus normal operation.
In terms of existing technologies, the fatigue strength measuring apparatus and system that preferred embodiments of the present invention provide have Following advantageous effect:The fatigue strength measuring apparatus accuracy of measurement is high, and measurement efficiency is high, can reduce disappearing for human resources Consumption.The fatigue strength measuring apparatus includes collecting unit, exciting unit and measuring unit;The exciting unit includes balance base Seat, supporting tool, exciting device and power part is led, the supporting tool is oppositely disposed at the balance base with the exciting device It on seat, and leads power part described in and is mutually permanently connected, wherein the supporting tool is installed on institute for installing fastener to be tested The fastener to be tested stated on supporting tool is contacted with the power of the leading part, and the exciting device is via the power of the leading part to described to be measured It tries fastener and applies exciting force;The collecting unit is arranged on the fastener to be tested, for being applied via the exciting unit The vibratory response data of the fastener to be tested after exciting force are added to be acquired;The measuring unit is single with the acquisition respectively Exciting device in the first and described exciting unit is electrically connected, for the work shape to the collecting unit and the exciting device State is controlled, and according to the collected vibratory response data of the collecting unit to the fatigue strength of the fastener to be tested into Row calculates, and obtains corresponding fatigue strength information, to by the consumption for reducing human resources, realize that measurement efficiency is high and measures The high fatigue strength of precision measures.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, present pre-ferred embodiments cited below particularly, And coordinate appended attached drawing, it is described in detail below.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair The restriction of the claims in the present invention protection domain, for those of ordinary skill in the art, what is do not made the creative labor Under the premise of, it can also be obtained according to these attached drawings other relevant attached drawings.
Fig. 1 is a kind of block diagram for the fatigue strength measuring apparatus that preferred embodiments of the present invention provide.
Fig. 2 is a kind of structural schematic diagram for the exciting unit that preferred embodiments of the present invention provide.
Fig. 3 is a kind of distribution schematic diagram for the collecting unit that preferred embodiments of the present invention provide.
Fig. 4 is a kind of block diagram for the measuring unit that preferred embodiments of the present invention provide.
Fig. 5 is a kind of block diagram for the fatigue strength measuring system that preferred embodiments of the present invention provide.
Icon:100- fatigue strength measuring apparatus;110- collecting units;120- exciting units;130- measuring units;121- Gimballed base;122- supporting tools;123- exciting devices;124- leads power part;200- fasteners to be tested;125- shake tables;126- Vibrate sewing platform base;1251- horizontal sliding tables;1252- moving-coil structures;1261- moving-coil pedestals;1262- slide unit pedestals;127- switching works Dress;128- leads power plate;111- three-dimensional acceleration transducers;112- three-dimensional foil gauges;131- control modules;132- computing modules; 10- fatigue strength measuring systems;300- power supply units.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented The component of example can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common The every other embodiment that technical staff is obtained without creative efforts belongs to the model that the present invention protects It encloses.
It should be noted that:Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " setting ", " peace Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection;It can be mechanical connection, can also be electrical connection;Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition The concrete meaning of language in the present invention.
Below in conjunction with the accompanying drawings, it elaborates to some embodiments of the present invention.In the absence of conflict, following Feature in embodiment and embodiment can be combined with each other.
Fig. 1 is please referred to, is a kind of box signal for the fatigue strength measuring apparatus 100 that preferred embodiments of the present invention provide Figure.In embodiments of the present invention, the fatigue strength measuring apparatus 100 is used for needing to carry out fatigue strength survey in track structure The fastener of amount measures efficient and measures the high fatigue strength measurement of precision, to reduce human resources consumption, raising row The safety of vehicle operation.Wherein, the fatigue strength measuring apparatus 100 includes collecting unit 110, exciting unit 120 and measures Unit 130, the exciting unit 120 are used to apply exciting force to fastener to be measured, the collecting unit 110 be used for via The vibratory response data that the exciting unit 120 applies the fastener to be measured after exciting force are acquired, the measurement Unit 130 is electrically connected with the collecting unit 110 and the exciting unit 120 respectively, for controlling the collecting unit 110 And the working condition of the exciting unit 120, and carry out fatigue according to 110 collected vibratory response data of the collecting unit Strength co-mputation obtains corresponding fatigue strength information.Wherein the measuring unit 130 can exert a force to the exciting unit 120 Excitation force frequency, amplitude of exciting force, the time point of force and force duration are controlled;The measuring unit 130 can be to described The time point of 110 gathered data of collecting unit is controlled.
Optionally, Fig. 2 is please referred to, is a kind of structural representation for the exciting unit 120 that preferred embodiments of the present invention provide Figure.In the present embodiment, the exciting unit 120 includes gimballed base 121, supporting tool 122, exciting device 123 and leads power Part 124.The gimballed base 121 makes the support work for disposing the supporting tool 122 and the exciting device 123 Fill 122 and the holding balance of the exciting device 123;The supporting tool 122 is for installing fastener 200 to be tested, the exciting Device 123 is led power part 124 and is fixedly connected with the supporting tool 122 by described, with lead described in passing through power part 124 to mounted on Fastener to be tested 200 on the supporting tool 122 applies exciting force.
Specifically, the supporting tool 122 is oppositely disposed at the exciting device 123 on the gimballed base 121, And it is detachably connected respectively by bolt and the gimballed base 121.The fastener to be tested being installed on the supporting tool 122 200 contact with the power of the leading part 124, to receive the exciting force applied by the exciting device 123 by the power of the leading part 124. 200 number of fastener to be tested wherein installed on the supporting tool 122 can be one, can also be two.In this implementation In a kind of embodiment of example, 200 number of fastener to be tested is two, and two fasteners 200 to be tested are respectively set In the opposite both sides of supporting tool 122, and it is bolted connected.
In the present embodiment, the exciting device 123 is including shake table 125 and for carrying shaking for the shake table 125 Dynamic sewing platform base 126.The vibration sewing platform base 126 is fixed on the gimballed base 121, is carried on the vibration sewing platform base For generating exciting force, the power of the leading part 124 contacts with each other shake table 125 on 126 with the shake table 125, and passes through spiral shell Bolt is fixedly connected with the shake table 125 and the vibration sewing platform base 126, and the exciting force that the shake table 125 is generated passes It leads to the fastener 200 to be tested.
In the present embodiment, the shake table 125 includes horizontal sliding table 1251 and the moving-coil structure for generating exciting force 1252, the horizontal sliding table 1251 is bolted with the power of the leading part 124 and the vibration sewing platform base 126 respectively, and with The moving-coil structure 1252 is fixedly connected, so that the exciting force that the moving-coil structure 1252 generates is via the horizontal sliding table 1251 And the power of the leading part 124 is conducted to the fastener to be tested 200.
Wherein, the vibration sewing platform base 126 includes moving-coil pedestal 1261 and slide unit pedestal 1262.The moving-coil pedestal 1261 And the slide unit pedestal 1262 is respectively used to carry the moving-coil structure 1252 and the horizontal sliding table 1251.Specifically, described The side of moving-coil pedestal 1261 is contacted with the gimballed base 121 and fixed, the separate balance on the moving-coil pedestal 1261 The other side of pedestal 121 is contacted with the moving-coil structure 1252, to be carried to the moving-coil structure 1252.
The other side far from the gimballed base 121 on the moving-coil pedestal 1261 is also fixed with the slide unit pedestal 1262 Connection, so that the horizontal sliding table 1251 that the moving-coil structure 1252 connects contacts with each other with the slide unit pedestal 1262, and It is fixed by bolt and the slide unit pedestal 1262 and the power of the leading part 124.
In the present embodiment, the power of the leading part 124 including switching tooling 127 and leads power plate 128.The switching tooling 127 It is contacted with the fastener to be tested 200 being installed on the supporting tool 122, the power of the leading plate 128 is for connecting the switching work 127 and the horizontal sliding table 1251 are filled, the exciting force that the moving-coil structure 1252 generates is conducted to and the switching tooling The fastener to be tested 200 of 127 contacts.
Specifically, the power of the leading plate 128 is contacted and is fixed with the horizontal sliding table 1251, and the switching tooling 127 passes through Bolt is fixedly connected with the supporting tool 122 and the power of the leading plate 128 respectively, the switching tooling 127 and is installed on described Fastener to be tested 200 on supporting tool 122 contacts with each other, and the exciting force conducted via the horizontal sliding table 1251 is passed through The power of the leading plate 128 is applied on the fastener to be tested 200.
In the present embodiment, the switching tooling 127 be rectangular parallelepiped structure, the side of the switching tooling 127 with it is described The top of supporting tool 122 is fixedly connected, the other side on the switching tooling 127 far from the supporting tool 122 with it is described The one side for leading power plate 128 is fixedly connected, on the power of the leading plate 128 with 127 fixed side of the switching tooling also with it is described Horizontal sliding table 1251 is contacted and is fixed.
Fig. 3 is please referred to, is a kind of distribution schematic diagram for the collecting unit 110 that preferred embodiments of the present invention provide.At this In embodiment, the collected 200 corresponding vibratory response data of fastener to be tested of the collecting unit 110 may include shaking Dynamic acceleration information and stress variation data.The collecting unit 110 includes multiple three-dimensional acceleration transducers 111 and multiple three To foil gauge 112, the collecting unit 110 is strained by the multiple three-dimensional acceleration transducer 111 and the multiple three-dimensional Piece 112 acquires the vibration acceleration data and stress variation data of 200 position of fastener to be tested respectively.
Optionally, the multiple three-dimensional acceleration transducer 111 is separately positioned on to vibrate on the fastener to be tested 200 and ring The position that amplitude is big is answered, for the vibration of corresponding position to add under corresponding exciting force effect to the fastener 200 to be tested Speed data is acquired.
Optionally, the multiple three-dimensional foil gauge 112 is separately positioned on 200 upper stress of the fastener to be tested variation and concentrates Position, for the stress variation data to the fastener 200 to be tested corresponding position under corresponding exciting force effect into Row acquisition.
Fig. 4 is please referred to, is a kind of block diagram for the measuring unit 130 that preferred embodiments of the present invention provide.At this In embodiment, the measuring unit 130 is a computer for carrying processor, and the processor may be a kind of at signal The IC chip of reason ability can carry out data processing to 110 collected vibratory response data of the collecting unit, obtain To the fatigue strength of fastener 200 to be tested.Above-mentioned processor can be general processor, including central processing unit (Central Processing Unit, CPU), network processing unit (Network Processor, NP) etc..It can also be Digital Signal Processing It is device (DSP), application-specific integrated circuit (ASIC), ready-made programmable gate array (FPGA) or other programmable logic device, discrete Door or transistor logic, discrete hardware components.It may be implemented or execute the disclosed each side in the embodiment of the present invention Method, step and logic diagram.General processor can be microprocessor or the processor can also be any conventional processing Device etc..
Wherein, the measuring unit 130 includes control module 131 and computing module 132, and the control module 131 is distinguished It is electrically connected with the exciting device 123 in the collecting unit 110 and the exciting unit 120, for controlling the exciting dress It sets 123 pairs of fasteners 200 to be tested and applies exciting force, and/or control the collecting unit 110 to the institute after applying exciting force The vibratory response data for stating fastener 200 to be tested are acquired.
The control module 131 is also electrically connected with the computing module 132, and being used for will be via the collecting unit 110 The vibratory response data of the fastener to be tested 200 got are sent to the computing module 132, so that the computing module 132 The fatigue strength of the fastener 200 to be tested is calculated according to the vibratory response data.
Wherein, the measuring unit 130 controls the working condition of the exciting unit 120 and the collecting unit 110, and The process for being correspondingly made available the fatigue strength of the fastener to be tested 200 is as follows:
First, the measuring unit 130 is by controlling the exciting device 123 to being installed on the supporting tool 122 The fastener 200 to be tested apply the exciting force preset within the scope of excited frequency so that the fastener to be tested 200 shakes It is dynamic;
Secondly, the measuring unit 130 by control three-dimensional acceleration transducer 111 in the collecting unit 110 and Three-dimensional foil gauge 112 is to the corresponding vibration acceleration data of fastener 200 to be tested each position under the exciting force and answers Power delta data is acquired;
Then, the measuring unit 130 is to the corresponding vibration acceleration of collected 200 each position of fastener to be tested Data and stress variation data carry out model analysis, obtain multiple operation modes of the fastener to be tested 200, and from described more The target that the fastener to be tested 200 is obtained in a operation mode participates in mode;
Then, it is corresponding sharp according to mode is participated in the target to control the exciting device 123 for the measuring unit 130 Vibration frequency and exciting amplitude carry out vibration test to the fastener 200 to be tested, and control the collecting unit 110 acquire it is described Vibration acceleration data and stress variation data of 200 each position of fastener to be tested under corresponding excited frequency and exciting amplitude;
Finally, the measuring unit 130 is based on the collected fastener 200 to be tested under target participation mode Vibration acceleration data and stress variation data, 200 corresponding fatigue strength of the fastener to be tested is calculated.
In the present embodiment, the fastener to be tested 200 is elastic bar fastener, and the elastic bar fastener includes W types spring and E types Any one in spring.
Fig. 5 is please referred to, is a kind of box signal for the fatigue strength measuring system 10 that preferred embodiments of the present invention provide Figure.In embodiments of the present invention, the fatigue strength measuring system 10 includes that power supply unit 300 and above-mentioned fatigue strength measure Equipment 100, the power supply unit 300 are electrically connected with the fatigue strength measuring apparatus 100, for being surveyed to the fatigue strength It measures equipment 100 and electric energy is provided, so that 100 normal operation of fatigue strength measuring apparatus.
In conclusion in the fatigue strength measuring apparatus and system that preferred embodiments of the present invention provide, the fatigue Intensity measuring apparatus accuracy of measurement is high, and measurement efficiency is high, can reduce the consumption of human resources.The fatigue strength measurement is set Standby includes collecting unit, exciting unit and measuring unit;The exciting unit includes gimballed base, supporting tool, exciting device And power part is led, the supporting tool is oppositely disposed at the exciting device on the gimballed base, and leads power by described Part is mutually permanently connected, wherein the supporting tool is installed on to be measured on the supporting tool for installing fastener to be tested Examination fastener is contacted with the power of the leading part, and the exciting device applies exciting force via the power of the leading part to the fastener to be tested; The collecting unit is arranged on the fastener to be tested, for waiting for described in applying after exciting force via the exciting unit The vibratory response data of test fastener are acquired;The measuring unit respectively in the collecting unit and the exciting unit Exciting device be electrically connected, controlled for the working condition to the collecting unit and the exciting device, and according to The collected vibratory response data of collecting unit calculate the fatigue strength of the fastener to be tested, obtain corresponding Fatigue strength information, to by the consumption for reducing human resources, realize that measurement efficiency is high and it is strong to measure the high fatigue of precision Degree measures.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of fatigue strength measuring apparatus, which is characterized in that the fatigue strength measuring apparatus includes collecting unit, exciting list Member and measuring unit;
The exciting unit includes gimballed base, supporting tool, exciting device and leads power part, the supporting tool and the exciting Device is oppositely disposed on the gimballed base, and is led power part described in and be mutually permanently connected, wherein the supporting tool For installing fastener to be tested, the fastener to be tested being installed on the supporting tool is contacted with the power of the leading part, the exciting Device applies exciting force via the power of the leading part to the fastener to be tested;
The collecting unit is arranged on the fastener to be tested, for via the institute after exciting unit application exciting force The vibratory response data for stating fastener to be tested are acquired;
The measuring unit is electrically connected with the exciting device in the collecting unit and the exciting unit respectively, for institute The working condition for stating collecting unit and the exciting device is controlled, and according to the collected vibratory response of the collecting unit Data calculate the fatigue strength of the fastener to be tested, obtain corresponding fatigue strength information.
2. fatigue strength measuring apparatus according to claim 1, which is characterized in that the exciting device include shake table and Vibration sewing platform base for carrying the shake table;
The vibration sewing platform base is fixed on the gimballed base, and the shake table being carried on the vibration sewing platform base is used for Exciting force is generated, the power of the leading part contacts with each other with the shake table, and passes through bolt and the shake table and the shake table Pedestal is fixedly connected, and the exciting force that the shake table generates is conducted to the fastener to be tested.
3. fatigue strength measuring apparatus according to claim 2, which is characterized in that the shake table include horizontal sliding table and Moving-coil structure for generating exciting force;
The horizontal sliding table is fixedly connected with the moving-coil structure, and is passed through respectively with the power of the leading part and the vibration sewing platform base Bolt is fixed, so that the exciting force that the moving-coil structure generates is conducted to described wait for via the horizontal sliding table and the power of the leading part Test fastener.
4. fatigue strength measuring apparatus according to claim 3, which is characterized in that the vibration sewing platform base includes moving-coil base Seat and slide unit pedestal;
The side of the moving-coil pedestal contacts and fixes with the gimballed base, far from the gimballed base on the moving-coil pedestal The other side contacted with the moving-coil structure, to be carried to the moving-coil structure;
The other side far from the gimballed base is also fixedly connected with the slide unit pedestal on the moving-coil pedestal, so that described dynamic The horizontal sliding table of coil structures connection contacts with each other with the slide unit pedestal, and passes through bolt and the slide unit pedestal and described Power part is led to fix.
5. fatigue strength measuring apparatus according to claim 3, which is characterized in that the power of the leading part include switching tooling and Lead power plate;
The power of the leading plate is contacted and is fixed with the horizontal sliding table, the switching tooling by bolt respectively with the supporting tool And the power of the leading plate is fixedly connected, the switching tooling contacts with each other with the fastener to be tested being installed on the supporting tool, It is applied on the fastener to be tested so that the exciting force conducted via the horizontal sliding table is led power plate described in.
6. fatigue strength measuring apparatus according to claim 5, which is characterized in that the switching tooling is cuboid knot Structure, the side of the switching tooling are fixedly connected with the top of the supporting tool, far from the support on the switching tooling The other side of tooling is fixedly connected with the one side of the power of the leading plate, on the power of the leading plate with the fixed side of the switching tooling Also contacts and fix with the horizontal sliding table.
7. fatigue strength measuring apparatus according to claim 1, which is characterized in that the vibratory response data include vibration Acceleration information and stress variation data, the collecting unit include multiple three-dimensional acceleration transducers and the strain of multiple three-dimensionals Piece;
The multiple three-dimensional acceleration transducer is separately positioned on each position that vibratory response amplitude is big on the fastener to be tested Place, for the vibration acceleration data of corresponding position to be acquired under corresponding exciting force effect to the fastener to be tested;
The multiple three-dimensional foil gauge is separately positioned on the position that the fastener upper stress to be tested variation is concentrated, for pair The fastener to be tested stress variation data of corresponding position under corresponding exciting force effect are acquired.
8. fatigue strength measuring apparatus according to claim 1, which is characterized in that the measuring unit includes control module And computing module;
The control module is electrically connected with the exciting device in the collecting unit and the exciting unit respectively, for controlling After the exciting device applies exciting force to the fastener to be tested, and/or the control collecting unit is to applying exciting force The vibratory response data of the fastener to be tested are acquired;
The control module is also electrically connected with the computing module, to be tested for will be got via the collecting unit The vibratory response data of fastener are sent to the computing module so that the computing module according to the vibratory response data to institute The fatigue strength for stating fastener to be tested is calculated.
9. the fatigue strength measuring apparatus according to any one of claim 1-8, which is characterized in that the button to be tested Part is elastic bar fastener, and the elastic bar fastener includes any one in W types spring and E type springs.
10. a kind of fatigue strength measuring system, which is characterized in that the fatigue strength measuring system includes power supply unit and right It is required that the fatigue strength measuring apparatus described in any one of 1-9, the power supply unit and fatigue strength measuring apparatus electricity Property connection, for the fatigue strength measuring apparatus provide electric energy so that the fatigue strength measuring apparatus normal operation.
CN201810351030.5A 2018-04-18 2018-04-18 Fatigue strength measuring equipment and system Active CN108593233B (en)

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Application Number Priority Date Filing Date Title
CN201810351030.5A CN108593233B (en) 2018-04-18 2018-04-18 Fatigue strength measuring equipment and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810351030.5A CN108593233B (en) 2018-04-18 2018-04-18 Fatigue strength measuring equipment and system

Publications (2)

Publication Number Publication Date
CN108593233A true CN108593233A (en) 2018-09-28
CN108593233B CN108593233B (en) 2020-09-04

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