CN105825014A - Axle safety health assessment system and method based on axle coupling analysis - Google Patents
Axle safety health assessment system and method based on axle coupling analysis Download PDFInfo
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Abstract
The invention discloses an axle safety health assessment system and method based on axle coupling analysis, and relates to the field of bridge health monitoring. The axle safety health assessment system comprises an axle coupling analysis subsystem, a bridge health situation assessment system and a traffic safety assessment system, wherein the axle coupling analysis subsystem utilizes actual measurement data of a bridge health monitoring system to correct a bridge finite element model to obtain a bridge benchmark finite element model, and the bridge benchmark finite element model is used for carrying out axle coupling vibration analysis calculation to obtain a theoretical calculating value under an equal condition of the actual measurement data of the bridge health monitoring system; the bridge health situation assessment system compares the actual measurement data with the theoretical calculating value to assess the bridge health situation; the traffic safety assessment system utilizes the theoretical calculating value obtained through the axle coupling vibration analysis calculation and actual measurement bridge vibration data to assess a situation of the traffic safety. The theoretical data and the actual measurement data are combined to realize a purpose that the bridge health and the traffic safety are quantitatively analyzed and assessed, and the reliability of an assessment result is improved.
Description
Technical field
The present invention relates to bridge health monitoring field, be specifically related to a kind of vehicle bridge safety and Health assessment system and method analyzed based on vehicle-bridge coupling.
Background technology
From last century Mo, structure control study hotspot has turned to structure monitoring system.During the last ten years, bridge becomes bridge monitoring gradually receive publicity and obtain the biggest development.Along with the complication of softization of Large Span Bridges and form with function, bridge structure becomes bridge monitoring system to have become as the study hotspot of domestic and international academia, engineering circles.China is built at some and is provided with bridge health monitoring system on the Large Span Bridges built, and bridge structure carries out long term monitoring, but bridge health condition evaluation and traffic safety assess the most perfect method.
At present, bridge health monitoring system is when carrying out bridge health condition evaluation and traffic safety assessment, rest on the statistical analysis of measured data self, such as trend analysis, correlation analysis and statistical analysis etc., and the contrast between the statistic analysis result of measured data self and design load, normal value, as whether whether measured value exceed normal value scope etc. beyond threshold range, measured value, but threshold value, normal value exist in a big way, can not be to measured value quantitative comparison, practicality is the strongest.This alanysis method is primarily present following shortcoming:
(1) threshold value is often a ultimate value, and typically up to less than this ultimate value in daily operation, even much smaller than this ultimate value, when measured value or Trend value exceed threshold range, bigger damage may occur in bridge structure；
(2) less at train load, when the response of vehicle and bridge vibration is big, when i.e. there is bigger difference in measured value and actual value, measured value may still in threshold range, but actually measured value has had deviated from normal value.
Summary of the invention
For defect present in prior art, it is an object of the invention to provide and gross data is combined with measured data, quantitative analysis assessment bridge health and traffic safety, improve a kind of vehicle bridge safety and Health assessment system and method analyzed based on vehicle-bridge coupling of the reliability of assessment result.
For reaching object above, the present invention adopts the technical scheme that: a kind of vehicle bridge safety and Health assessment system analyzed based on vehicle-bridge coupling, including:
Vehicle-bridge coupling analyzing subsystem, it utilizes the measured data of bridge health monitoring system to be modified bridge finite element model obtaining bridge baseline finite element model, bridge baseline finite element model is utilized to carry out Vehicle-bridge Coupling Analysis calculating, it is thus achieved that with the measured data of bridge health monitoring system calculated value under equal conditions；
Bridge health condition evaluation system, by the measured data of bridge health monitoring system compared with through the calculated calculated value of Vehicle-bridge Coupling Analysis, the health status of assessment bridge；
Traffic safety assessment system, utilizes the calculated calculated value of Vehicle-bridge Coupling Analysis and actual measurement bridge vibration data, the situation of comprehensive assessment traffic safety.
On the basis of technique scheme, described vehicle-bridge coupling analyzing subsystem includes:
Bridge health monitoring module, for measuring the factor affecting bridge structure stiffness matrix and mass matrix, and the measured data of bridge structure response；
Bridge finite element model correcting module, for the measured data correction bridge finite element model responded according to bridge structure to be assessed, and obtains bridge baseline finite element model；
Vehicle-bridge Coupling Analysis module, is used for utilizing bridge baseline finite element model to carry out Vehicle-bridge Coupling Analysis calculating, it is thus achieved that with the measured data of bridge health monitoring system calculated value under equal conditions.
On the basis of technique scheme, the measured data of described bridge structure response includes self excited vibrational frequency of bridge span, stress, deformation.
A kind of vehicle bridge safety and Health appraisal procedure analyzed based on vehicle-bridge coupling, step is as follows:
S1, design and construction information according to bridge set up bridge finite element model；
S2, according to affecting the factor of bridge structure stiffness matrix and mass matrix, determine the parameter value of structural damping form and influence factor, and determine that bridge finite element model needs the parameter revised according to the parameter value of described structural damping form and influence factor；
S3, the parameter utilizing the measured data of bridge health monitoring system to revise bridge finite element model needs are modified, it is thus achieved that the bridge baseline finite element model corresponding with realistic bridges beam-like condition；
S4, bridge baseline finite element model is imported the Vehicle-bridge Coupling Analysis program in Vehicle-bridge Coupling Analysis module；
S5, the vehicle surveyed according to bridge health monitoring system and speed arrange the technical parameter of Vehicle-bridge Coupling Analysis program, carry out Vehicle-bridge Coupling Analysis calculating；
S6, point layout according to bridge health monitoring system, extract corresponding Vehicle-bridge Coupling Analysis calculated value；
S7, from bridge health monitoring system data base inquire about the time period corresponding to Vehicle-bridge Coupling Analysis measured data；
S8, it is analyzed comparing by measured data and calculated value, the health status of assessment bridge；
S9, utilize Vehicle-bridge Coupling Analysis calculated train integrated managemant parameter and actual measurement bridge vibration parameter, the traffic safety of train is carried out comprehensive assessment.
On the basis of technique scheme, the Vehicle-bridge Coupling Analysis described in step S5 calculates and uses the method separating iteration, specifically comprises the following steps that
Make iterations i=0；
1. the bridge response extracting t is iteration initial value, utilizes vehicle-bridge coupling condition and pavement roughness to calculate the kinematic parameter of car wheel-set；
2. updating vehicular load, utilize the vehicle of t to respond the vehicle vibration response of the ith iteration solving t+ Δ t, wherein Δ t is incremental time；
3. bridge equation of motion load is updated according to the vehicle vibration response of ith iteration；
4. the bridge response utilizing t solves the vehicle vibration response of the ith iteration of t+ Δ t；
5. judging whether the result of i & lt and the i-th-1 time iteration restrains, if do not restrained, then 5. 1. the bridge vibration response of ith iteration carry out i+1 time iteration for iteration initial value circulation step to step；
Until convergence, the result preserving iteration enters the iteration of subsequent time.
On the basis of technique scheme, the train integrated managemant parameter described in step S9 is train derailment coefficients.
Compared with prior art, it is an advantage of the current invention that:
(1) a kind of based on vehicle-bridge coupling analysis the vehicle bridge safety and Health assessment system of the present invention includes vehicle-bridge coupling analyzing subsystem, bridge health condition evaluation system and traffic safety assessment system, gross data is combined with measured data, realize quantitative analysis assessment bridge health and traffic safety, improve the reliability of assessment result.
(2) vehicle-bridge coupling of the present invention analyzes program calculated result can need the important parameter supplementary data of the rim bridge bit architecture response paid close attention to being fitted without sensor, thus grasps the health status of whole bridge all-sidedly and accurately.
(3) present invention by by gross data compared with measured data, utilize the parameters such as checkout coefficient, derailment coefficients, off-load rate preferably and the specification such as " railroad bridge calibrating specification ", " Design of High-speed Railway specification " (trying) combine and carries out comprehensive assessment.
Accompanying drawing explanation
Fig. 1 is a kind of vehicle bridge safety and Health assessment system overall framework figure analyzed based on vehicle-bridge coupling in the embodiment of the present invention；
Fig. 2 is a kind of vehicle bridge safety and Health assessment system implementing procedure figure analyzed based on vehicle-bridge coupling in the embodiment of the present invention；
Fig. 3 is embodiment of the present invention Bridge FEM updating module implementing procedure figure；
Fig. 4 is Vehicle-bridge Coupling Analysis module implementing procedure figure in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Seeing shown in Fig. 1, Fig. 2, the embodiment of the present invention provides a kind of vehicle bridge safety and Health assessment system and method analyzed based on vehicle-bridge coupling, including:
Vehicle-bridge coupling analyzing subsystem, it utilizes the measured data of bridge health monitoring system to be modified bridge finite element model obtaining bridge baseline finite element model, bridge baseline finite element model is utilized to carry out Vehicle-bridge Coupling Analysis calculating, it is thus achieved that with the measured data of bridge health monitoring system calculated value under equal conditions；
Bridge health condition evaluation system, by the measured data of bridge health monitoring system compared with through the calculated calculated value of Vehicle-bridge Coupling Analysis, and combines the health status of corresponding specification comprehensive assessment bridge；
Traffic safety assessment system, utilizes the calculated calculated value of Vehicle-bridge Coupling Analysis and actual measurement bridge vibration data, and combines the situation of corresponding specification comprehensive assessment traffic safety.
Vehicle-bridge coupling analyzing subsystem includes:
Bridge health monitoring module, for measuring the factor affecting bridge structure stiffness matrix and mass matrix, and the measured data of bridge structure response；
Bridge finite element model correcting module, for the measured data correction bridge finite element model responded according to bridge structure to be assessed, and obtains bridge baseline finite element model；
Vehicle-bridge Coupling Analysis module, is used for utilizing bridge baseline finite element model to carry out Vehicle-bridge Coupling Analysis calculating, it is thus achieved that with the measured data of bridge health monitoring system calculated value under equal conditions.
On the basis of bridge health monitoring system, use Model Updating Technique and Vehicle-bridge Coupling Analysis technology, utilize the relative analysis of measured data and gross data that bridge health and traffic safety are estimated.
At the beginning of bridge health monitoring system is set up, bridge structure is in normal condition, bridge finite element model is modified by the measured data utilizing bridge health monitoring system, obtain the bridge baseline finite element model matched with actual bridge, after determining bridge baseline finite element model, bridge baseline finite element model is utilized to carry out Vehicle-bridge Coupling Analysis calculating, obtain the calculated value under equal conditions of the measured data with bridge health monitoring system, by measured data compared with calculated value, and combine corresponding codes and standards bridge health and traffic safety are estimated.
Bridge health monitoring system, it is measured the measured data such as self excited vibrational frequency of bridge span, stress, deformation etc. of bridge structure response, and affects the factor of bridge structure stiffness matrix and mass matrix.
Shown in Figure 3, bridge finite element model correcting module Modifying model includes:
Collect Bridge Design and construction information, utilize Ansys software to set up bridge finite element model；
Analyzing influence bridge structure stiffness matrix and the factor of mass matrix, determine the parameter value of structural damping form and influence factor；
On the various factors affecting bridge structure stiffness matrix and mass matrix, utilize finite element analysis computation to do influence factor's sensitivity analysis, determine the parameter for Modifying model；
Use Ansys software optimization design, utilize the measured data of bridge health monitoring system that bridge finite element model is modified, it is thus achieved that the bridge baseline finite element model matched with actual bridge.
Vehicle-bridge Coupling Analysis module is to import bridge baseline finite element model in Vehicle-bridge Coupling Analysis program to calculate, using the method separating iteration, the train load information utilizing bridge health monitoring system to survey carries out Vehicle-bridge Coupling Analysis as load input Vehicle-bridge Coupling Analysis program.
The iteration of each time step is the vibratory response of the vehicle according to t and bridge, uses Newmark-β method to solve the vehicle of t+ Δ t and the vibratory response of bridge, concretely comprises the following steps:
Make iterations i=0；
1. the bridge response extracting current time t is iteration initial value, utilizes vehicle-bridge coupling condition and pavement roughness to calculate the kinematic parameter y of car wheel-setgi,
2. vehicular load is updatedThe vehicle response utilizing t solves the vehicle vibration response of the ith iteration of t+ Δ t, and wherein Δ t is incremental time；
3. bridge equation of motion load item is updated according to ith iteration vehicle vibration response
4. the bridge response utilizing t solves the vehicle vibration response of the ith iteration of t+ Δ t；
Whether 5. restraining according to the result of i & lt and the i-th-1 time iteration, if being unsatisfactory for the condition of convergence, then the bridge vibration response of ith iteration, repeat step 1. to 5. carrying out i+1 time iteration if being iteration initial value；
Until meeting the condition of convergence, preserving result and entering the iteration of subsequent time.
Shown in Figure 4, Vehicle-bridge Coupling Analysis module operating process is:
(1) vehicle determined by Train number recognition instrument is read in bridge and bridge health monitoring system for information about；
(2) according to the data genaration bridge read in and the rigidity of vehicle, damping, mass matrix；
(3) given initial time, i.e. during t=0, bridge and the displacement of vehicle, speed and acceleration；
(4) wheel of vehicle is calculated to the position on bridge；
(5) using a upper moment bridge moving force-responsive as primary iteration；
(6) Uneven road compliance r (vt) of current location is calculated；
(7) bridge effect to vehicle is calculated by current location bridge moving force-responsive and road surface not compliance；
(8) solve Vehicular vibration equation, obtain the dynamic response of current time vehicle；
(9) according to the dynamic response of current time vehicle, the vehicle active force to bridge is calculated；
(10) solve bridge vibration equation, obtain the dynamic response of current time bridge；
(11) judging whether bridge displacement restrains, convergence then forwards next step to, does not restrains, enters next step iteration, enters next step iteration with the bridge moving force-responsive obtained；
(12) judge whether vehicle goes out bridge, go out bridge then EP (end of program), do not go out bridge and then enter the iteration of subsequent time t+ Δ t.
Bridge health condition evaluation module operating process is:
(1) extract result of calculation, according to the point layout of bridge health monitoring system, extract corresponding Vehicle-bridge Coupling Analysis computational theory value；
(2) inquiry measured data, inquires about the measured data of time period corresponding with Vehicle-bridge Coupling Analysis from bridge health monitoring system data base；
(3) bridge health condition evaluation, is analyzed measured data and theory analysis data, and combines " railroad bridge calibrating specification " and utilize checkout coefficient and relevant limit value to specify the health status of comprehensive assessment bridge.
Traffic safety evaluation module operating process is:
(1) derailment coefficients is calculated, track cross force Q of inquiry bridge health monitoring system actual measurement and vertical force P, calculate derailment coefficients Q/P；
(2) the train derailment coefficients calculated by Vehicle-bridge Coupling Analysis theory of program and the measured data of bridge health monitoring system combine, and combine the codes and standards such as " railroad bridge calibrating specification " and " Design of High-speed Railway specification " (trying), the derailment coefficients probability less than 0.8 is more than 99% to utilize Reliability Theory to ensure, comprehensive assessment traffic safety.
The present invention is not limited to above-mentioned embodiment, for those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, within these improvements and modifications are also considered as protection scope of the present invention.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (6)
1. the vehicle bridge safety and Health assessment system analyzed based on vehicle-bridge coupling, it is characterised in that including:
Vehicle-bridge coupling analyzing subsystem, it utilizes the measured data of bridge health monitoring system to be modified bridge finite element model obtaining bridge baseline finite element model, bridge baseline finite element model is utilized to carry out Vehicle-bridge Coupling Analysis calculating, it is thus achieved that with the measured data of bridge health monitoring system calculated value under equal conditions；
Bridge health condition evaluation system, by the measured data of bridge health monitoring system compared with through the calculated calculated value of Vehicle-bridge Coupling Analysis, the health status of assessment bridge；
Traffic safety assessment system, utilizes the calculated calculated value of Vehicle-bridge Coupling Analysis and actual measurement bridge vibration data, the situation of comprehensive assessment traffic safety.
A kind of vehicle bridge safety and Health assessment system analyzed based on vehicle-bridge coupling, it is characterised in that: described vehicle-bridge coupling analyzing subsystem includes:
Bridge health monitoring module, for measuring the factor affecting bridge structure stiffness matrix and mass matrix, and the data of bridge structure response；
Bridge finite element model correcting module, for the measured data correction bridge finite element model responded according to bridge structure to be assessed, and obtains bridge baseline finite element model；
Vehicle-bridge Coupling Analysis module, is used for utilizing bridge baseline finite element model to carry out Vehicle-bridge Coupling Analysis calculating, it is thus achieved that with the measured data of bridge health monitoring system calculated value under equal conditions.
A kind of vehicle bridge safety and Health assessment system analyzed based on vehicle-bridge coupling, it is characterised in that: the measured data of described bridge structure response includes self excited vibrational frequency of bridge span, stress, deformation.
4. the vehicle bridge safety and Health appraisal procedure analyzed based on vehicle-bridge coupling, it is characterised in that step is as follows:
S1, design and construction information according to bridge set up bridge finite element model；
S2, according to affecting the factor of bridge structure stiffness matrix and mass matrix, determine the parameter value of structural damping form and influence factor, and determine that bridge finite element model needs the parameter revised according to the parameter value of described structural damping form and influence factor；
S3, the parameter utilizing the measured data of bridge health monitoring system to revise bridge finite element model needs are modified, it is thus achieved that the bridge baseline finite element model corresponding with realistic bridges beam-like condition；
S4, bridge baseline finite element model is imported the Vehicle-bridge Coupling Analysis program in Vehicle-bridge Coupling Analysis module；
S5, the vehicle surveyed according to bridge health monitoring system and speed arrange the technical parameter of Vehicle-bridge Coupling Analysis program, carry out Vehicle-bridge Coupling Analysis calculating；
S6, point layout according to bridge health monitoring system, extract corresponding Vehicle-bridge Coupling Analysis calculated value；
S7, from bridge health monitoring system data base inquire about the time period corresponding to Vehicle-bridge Coupling Analysis measured data；
S8, it is analyzed comparing by measured data and calculated value, the health status of assessment bridge；
S9, utilize Vehicle-bridge Coupling Analysis calculated train integrated managemant parameter and actual measurement bridge vibration parameter, the traffic safety of train is carried out comprehensive assessment.
A kind of vehicle bridge safety and Health appraisal procedure analyzed based on vehicle-bridge coupling, it is characterised in that: the Vehicle-bridge Coupling Analysis described in step S5 calculates and uses the method separating iteration, specifically comprises the following steps that
Make iterations i=0；
1. the bridge response extracting t is iteration initial value, utilizes vehicle-bridge coupling condition and pavement roughness to calculate the kinematic parameter of car wheel-set；
2. updating vehicular load, utilize the vehicle of t to respond the vehicle vibration response of the ith iteration solving t+ Δ t, wherein Δ t is incremental time；
3. bridge equation of motion load is updated according to the vehicle vibration response of ith iteration；
4. the bridge response utilizing t solves the vehicle vibration response of the ith iteration of t+ Δ t；
5. judging whether the result of i & lt and the i-th-1 time iteration restrains, if do not restrained, then the bridge vibration response of ith iteration is iteration initial value, and 5. 1. circulation step carry out i+1 time iteration to step；
Until convergence, the result preserving iteration enters the iteration of subsequent time.
A kind of vehicle bridge safety and Health appraisal procedure analyzed based on vehicle-bridge coupling, it is characterised in that: the train integrated managemant parameter described in step S9 is train derailment coefficients.
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| CN108629075A (en) * | 2018-03-22 | 2018-10-09 | 中交路桥北方工程有限公司 | A kind of camber beam lateral Displacement support stiffness analysis method |
| CN110263408A (en) * | 2019-06-13 | 2019-09-20 | 中汽研（天津）汽车工程研究院有限公司 | A method of utilizing BNI curve assessment NTF risk |
| CN110567661A (en) * | 2019-09-11 | 2019-12-13 | 重庆大学 | bridge damage identification method based on generalized pattern search algorithm and axle coupling |
| CN110617930A (en) * | 2019-08-12 | 2019-12-27 | 中车青岛四方机车车辆股份有限公司 | Method, device and system for simulating rail coupling vibration test |
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