CN104636561A - High-speed railway line design and evaluation method based on train-track system dynamics - Google Patents

Abstract

The invention discloses a high-speed railway line design and evaluation method based on train-track system dynamics. Body vibration response caused by high-speed railway line types is mainly concentrated within the range of low frequency below 1Hz, in order to effectively distinguish body vibration caused by the line types, line smoothness, offline structure rigidity and the like, indexes such as motion sickness, comfort, transition curve comfort and instantaneous comfort in standards such as ISO2631 and EN12299 are introduced by a system dynamic simulation method, reasonableness of line type parameters and line schemes is comprehensively analyzed and evaluated according to acceleration frequency distribution and cumulative frequency distribution, and basis is provided for determining the line type parameters and optimizing the line schemes. The method can overcome the shortcomings of a traditional line analysis method, running safety and riding comfort are forecasted, analyzed and evaluated under the condition of optional plane and profile section line type combination, a scientific analysis method is provided for high-speed railway line design, and the method has an important theoretical significance and engineering application values.

Description

A kind of design of the high-speed railway circuit based on fare system dynamics and appraisal procedure

Technical field

The present invention relates to railway engineering technology field; Particularly relate to the design of a kind of high-speed railway circuit based on fare system dynamics and appraisal procedure.

Background technology

High-speed railway overall trip speed significantly improves, and the dynamic interaction between train and circuit significantly strengthens.Operating practice shows, the bullet train vibration damping cycle is longer, and the superposition of vibration is remarkable on the impact of comfortableness, and the low-frequency vibration that deformation causes of rolling off the production line of high smooth-going condition becomes one of principal element affecting passenger's riding comfort.The reasonable value of High Speed Railway route shape parameter and alignment evaluation and optimization have become important topic anxious to be resolved.

For a long time, the determination of China railways line design parameter adopts Quasi-static Method.Train is reduced to a particle to the method or rigid body moves along on rigid track, carry out force analysis, as calculated, then to the uncompensated acceleration on curve and at that time the Comfort Evaluation index such as variability evaluate, thus determine the value standard of circuit plane vertical section parameter.The method have ignored the impact of vehicle, line construction and dynamic interaction thereof; Can not accurate analysis line parameter circuit value to the travel safety under train high speed traveling condition and riding comfort; Can not evaluate circuit longitudinally linear between impact, overall circuit line style project cannot be evaluated.Therefore, the method has significant limitation.

Both at home and abroad, rail truck-track/Modular Bridge System dynamics is the study hotspot problem in railway construction field always, achieve and develop on a large scale very much, be widely applied in the design and detection of the line constructions such as high speed railway track, bridge, roadbed and develop, achieving good economic and social benefits.In recent years, domestic scholars starts progressively vehicle-line system kinetic theory and method to be applied in the linear research of circuit, achieves some achievements.

Existing foundation and the optimization mostly concentrating on kinetic model based on vehicle-linear research of line system dynamics circuit, less to the riding comfort evaluation method and index study that are applicable to linear dynamic analysis, usually adopt evaluation method and the index of the dynamic structural analysis such as track, bridge.But, what under the dynamic system response problem that circuit is linear to be caused and line, structure caused is very different, one is that the vibration of generation is mainly in low-frequency range, under high speed traveling condition, the vibration of adjacent linear generation is similar to the excitation of long wave irregularity, two is the analyses to vibration, from considerations such as simple amplitudes, is difficult to distinguish linear impact.

Summary of the invention

Technical matters to be solved by this invention is, provides a kind of based on reflecting that different line condition is to the sex line design of bullet train ride comfort and appraisal procedure comparatively objectively, and according to the high-speed railway structure of described method design.

The technical solution adopted in the present invention is:

A kind of design of the high-speed railway circuit based on fare system dynamics and appraisal procedure, described high-speed railway circuit comprises track and supporting construction thereof, described High Speed Railway route shape is formed by the space structure of track and supporting construction thereof, comprise plane and straight line, circular curve and adjustment curve and vertical section slope section and vertical curve etc., it is characterized in that, the design proposal employing following methods design that described circuit is linear;

A. the linear preliminary project of circuit is by plane and straight line, circular curve, adjustment curve and vertical section slope section, vertical curves etc. combine continuously, according to vehicle component parameter, the parameter of track and supporting construction thereof and straight line, circular curve, the linear characteristic parameter such as adjustment curve, set up vehicle-line system Dynamic Analysis Model, the vehicle component parameter of preliminary project will be overlapped more, the parameter of track and supporting construction thereof and straight line, circular curve, the linear characteristic parameter such as adjustment curve is as model design conditions, obtain the dynamic system response of train in operational process, wherein said many cover preliminary projects embody parameter and the straight line of different tracks and supporting construction thereof, circular curve, the combination of the linear characteristic parameter such as adjustment curve, and the parameter in described many cover preliminary projects have at least two different,

B. the line style project design in Decision Making of Line Schemes is optimized according to dynamic system response:

B-1. the motion sickness evaluation method in ISO2631 is adopted, to many covers preliminary project of steps A, use the vehicle-line system Dynamic Analysis Model of steps A, calculate the body oscillating acceleration in vehicle dynamic response in 0.02Hz-4Hz band limits, be weighted according to ISO2631 medium frequency weighted curve and try to achieve body oscillating acceleration-root-mean square, as motion sickness evaluation index basis; Adopt based on the Comfort Evaluation method in ISO2631, to many covers preliminary project of steps A, use the vehicle-line system Dynamic Analysis Model of steps A, calculate the body oscillating acceleration in vehicle dynamic response in 0.5Hz-80Hz band limits, be weighted according to ISO2631 medium frequency weighted curve and try to achieve body oscillating acceleration-root-mean square, as Comfort Evaluation index basis; And carry out frequency disribution statistics and cumulative frequency distribution statistics by calculating vehicle dynamic response in steps A;

Wherein body oscillating acceleration-root-mean square A _rmscan be calculated by following formula:

$A_{\mathrm{rms}}={\left[\frac{1}{T}{\∫}_0^T{a}_w^2\left(t\right)\mathrm{dt}\right]}^{\frac{1}{2}}---\left(3\right)$

In formula, a _wfor spectrum overlapping acceleration (m/s ²); T is the duration (s).

B-2. rationally to reduce motion sickness, improve comfort level and reduce for the purpose of the larger acceleration frequency disribution of amplitude, according to the statistics of step B-1, determine described many cover tracks of preliminary project and the parameter of supporting construction thereof and straight line, circular curve, sensible factor in the linear characteristic parameter such as adjustment curve, adjustment is carried out to described sensible factor and forms the rear design proposal of adjustment, repeat step B-1, the motion sickness index of more described many cover preliminary projects and the rear design proposal of adjustment, comfort level index and acceleration Statistical Distribution Characteristics, so adjustment is compared repeatedly, obtain satisfied prioritization scheme.

The invention has the beneficial effects as follows: use the research method of High Speed Railway Trains and circuit dynamic interaction to carry out deficiency that line design and optimization make up traditional circuit plane vertical section analytical approach, realize the prediction of the driving power performance under different straight line, circular curve, adjustment curve combination condition, for the design of high-speed railway circuit provides important analysis means, achievement in research has important scientific value, has very strong directive significance to actual engineering design.

In addition, using riding comfort evaluation method to evaluate line design schemes, objectively can to embody the low-frequency component that circuit plane vertical section causes be the one of the main reasons affecting riding comfort, effectively to distinguish under linear, Track regularity and line rigidity of structure change etc. to the sex percentage contribution of ride comfort, in circuit design parameter and Decision Making of Line Schemes are optimized, increase identification, for parameter is determined to provide scientific basis with project plan comparison.

Accompanying drawing explanation

Fig. 1 be wheel to orbit coordinate system schematic diagram;

Fig. 2 a to Fig. 2 c is Dynamic Analysis Model schematic diagram;

Fig. 3 is circuit plane vertical section combination schematic diagram.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:

As shown in Figure 1 to Figure 3, a kind of high-speed railway structure based on the linear dynamics Design of circuit, comprise that circuit is linear, track and supporting construction thereof, the linear space structure by track and supporting construction thereof of circuit of described high-speed railway structure is formed, comprise plane and straight line, circular curve and adjustment curve and vertical section slope section and vertical curve etc., it is characterized in that, described circuit line style project adopts following methods design:

A, based on vehicle-circuit dynamic interaction theory, set up System call hijacking model.Model is divided into structure two subsystems under vehicle and line, therebetween with wheel track dynamic interrelationships for contact tie.(1) auto model consider car body, bogie, wheel to and suspension vibration performance; (2) under line, structural model considers that the structure such as track, bridge joins the impact of shaking; (3) linear parameter and track irregularity are the function of vehicle driving direction displacement, produce the effect of system additional force.(4) wheel-rail force carries out iterative, and first wheel-rail creep force adopts Kalker linear theory to calculate, and then adopts Johnson-Vermeulen theory to carry out non-liner revision.(5) Equation of Motion adopts numerical integration and is separated process of iteration and solves.

B, based on institute's established model, complete exploitation and the checking of Dynamic Analysis Software.

C, by vehicle-line system Cable Power Computation, obtain vehicle, each component displacement of circuit, speed and the dynamic system response such as acceleration and wheel-rail force time course data.

The dynamic system response time course data that d, utilization obtain, chooses corresponding riding comfort evaluation method for different analytic target.

D-1, for circuit linear parameter problem, analyze decay and the summation rule such as vibration acceleration, side knock, angle of roll speed, calculate comfort level index P on adjustment curve _cT, instantaneous comfort level index P _dEetc. index, carry out comprehensive evaluation in conjunction with acceleration root-mean-square value chart of frequency distribution, cumulative frequency distribution plan etc.

Wherein comfort level index P _cTbe expressed as:

In formula, for values of lateral maximal value, be specially car body center at origin of transition curve to adjustment curve terminal and the maximal value thereafter in 1.6s; for the time variability maximal value of values of lateral, be specially car body center before comprising origin of transition curve in 1s to the maximal value in adjustment curve ending range; for car body side roll angle speed maximal value when car body center is within the scope of adjustment curve; A-E is coefficient, according to stance or sitting posture value.

Instantaneous comfort level index P _dEfor body oscillating acceleration.

$P_{\mathrm{DE}}=100\·\left[\max \right[(a{\stackrel{\·\·}{y}}_{\mathrm{pp}}+b{\stackrel{\·\·}{y}}_{2s}-c),0]---\left(2\right)$

In formula, window when every 2s is within the scope of calculating duration, with values of lateral maximum peak peak value and mean value in window when being respectively each; A-c is coefficient, according to stance or sitting posture value.

D-2, for circuit line style project problem, according to international standard ISO2631, weighted root mean square is calculated to body oscillating acceleration information frequency-division section, carries out motion sickness and Analysis of Human Comfort, and carry out comprehensive evaluation in conjunction with acceleration root-mean-square value frequency disribution, cumulative frequency distribution etc.

Wherein body oscillating acceleration-root-mean square A _rmscan be calculated by following formula:

$A_{\mathrm{rms}}={\left[\frac{1}{T}{\∫}_0^T{a}_w^2\left(t\right)\mathrm{dt}\right]}^{\frac{1}{2}}---\left(3\right)$

In formula, a _wfor spectrum overlapping acceleration (m/s ²); T is the duration (s).

E, according to assay result, determine rational line parameter circuit value, Decision Making of Line Schemes, optimize line design.

The present invention, on the basis considering riding comfort under different line condition comparatively objectively, proposes the high-speed railway circuit design based on dynamic analysis and appraisal procedure, has important theory significance and engineering practical value.

Claims (1)

1. the design of the high-speed railway circuit based on fare system dynamics and appraisal procedure, described high-speed railway circuit comprises track and supporting construction thereof, described High Speed Railway route shape is formed by the space structure of track and supporting construction thereof, comprise plane and straight line, circular curve and adjustment curve and vertical section slope section and vertical curve etc., it is characterized in that, the design proposal employing following methods design that described circuit is linear;

A. the linear preliminary project of circuit is by plane and straight line, circular curve, adjustment curve and vertical section slope section, vertical curves etc. combine continuously, according to vehicle component parameter, the parameter of track and supporting construction thereof and straight line, circular curve, the linear characteristic parameter such as adjustment curve, set up vehicle-line system Dynamic Analysis Model, the vehicle component parameter of preliminary project will be overlapped more, the parameter of track and supporting construction thereof and straight line, circular curve, the linear characteristic parameter such as adjustment curve is as model design conditions, obtain the dynamic system response of train in operational process, wherein said many cover preliminary projects embody parameter and the straight line of different tracks and supporting construction thereof, circular curve, the combination of the linear characteristic parameter such as adjustment curve, and the parameter in described many cover preliminary projects have at least two different,

B. the line style project design in Decision Making of Line Schemes is optimized according to dynamic system response:

B-1. the motion sickness evaluation method in ISO2631 is adopted, to many covers preliminary project of steps A, use the vehicle-line system Dynamic Analysis Model of steps A, calculate the body oscillating acceleration in vehicle dynamic response in 0.02Hz-4Hz band limits, be weighted according to ISO2631 medium frequency weighted curve and try to achieve body oscillating acceleration-root-mean square, as motion sickness evaluation index basis; Adopt based on the Comfort Evaluation method in ISO2631, to many covers preliminary project of steps A, use the vehicle-line system Dynamic Analysis Model of steps A, calculate the body oscillating acceleration in vehicle dynamic response in 0.5Hz-80Hz band limits, be weighted according to ISO2631 medium frequency weighted curve and try to achieve body oscillating acceleration-root-mean square, as Comfort Evaluation index basis; And carry out frequency disribution statistics and cumulative frequency distribution statistics by calculating vehicle dynamic response in steps A;

Wherein body oscillating acceleration-root-mean square A _rmscan be calculated by following formula:

$A_{\mathrm{rms}}={\left[\frac{1}{T}{\∫}_0^T{a}_w^2\left(t\right)\mathrm{dt}\right]}^{\frac{1}{2}}---\left(3\right)$

In formula, a _wfor spectrum overlapping acceleration (m/s ²); T is the duration (s).

B-2. rationally to reduce motion sickness, improve comfort level and reduce for the purpose of the larger acceleration frequency disribution of amplitude, according to the statistics of step B-1, determine described many cover tracks of preliminary project and the parameter of supporting construction thereof and straight line, circular curve, sensible factor in the linear characteristic parameter such as adjustment curve, adjustment is carried out to described sensible factor and forms the rear design proposal of adjustment, repeat step B-1, the motion sickness index of more described many cover preliminary projects and the rear design proposal of adjustment, comfort level index and acceleration Statistical Distribution Characteristics, so adjustment is compared repeatedly, obtain satisfied prioritization scheme.