CN104679938A - Method for evaluating dynamic performance of heavy-haul train and rail coupling system - Google Patents
Method for evaluating dynamic performance of heavy-haul train and rail coupling system Download PDFInfo
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Abstract
The invention discloses a method for evaluating dynamic performance of a heavy-haul train and rail coupling system. According to the method, based on a simple one-dimensional heavy-haul train longitudinal dynamics model, the most severe key part of train shock can be quickly determined, then a single-particle train model and a longitudinal draw gear force calculation model of the key part are replaced with a more accurate three-dimensional train-rail coupling dynamics model and a three-dimensional draw gear force calculation model, so that dynamic performance of the integral system composed of a heavy-haul train and a heavy-load rail can be evaluated. The method can take both accuracy of performance evaluation and evaluation efficiency into consideration.
Description
Technical field
The present invention relates to heavy haul train field, particularly, relate to a kind of method for assessment of heavy haul train and Track Coupling System dynamic property.
Background technology
Start first draft group, macro-axis goods train has heavily become the efficiency improving Railway Freight Transportation and the Major Technology expanding capacity.Compared with common railway freight technology, the feature of heavy haul train and heavily loaded track is that the marshalling vehicle number of train is many, axle is great, the type of track structure parts and parameter changeable.Especially there is violent longitudinal impulse in the manipulation process such as heavy haul train traction and braking, show as larger hitch dynamic force, because of the impact that coupler force increases, vehicle axle weight increases and circuit service condition worsens, safety of train derailment is on the hazard.The large coupler force that heavy haul train produces, also can affect vehicle operating stability, transverse direction and vertical stationarity etc.To the simulation calculation of heavy haul train, the design and the debugging that can be heavy haul railway engineering and heavy haul train provide significant data, for guaranteeing that heavy haul train safe operation provides technical support.
At present, for heavy duty grow up marshalling heavy haul train modeling and solve, the main longitudinal impulse problem paying close attention to train, for the modeling method of longitudinal impulse and method for solving comparatively maturation.But owing to not considering that vehicle and track influence each other at the vibration of all directions and vehicle-interorbital, simulation nicety is caused to decline, its assessment result and practical operation situation have certain deviation, especially when more obvious for deviation during comparatively severe ruuning situation, the security of running to the rationality of design and heavy haul train brings challenges.On the other hand, consider that comparatively comprehensively vehicle-orbit coupling model carries out simulation if adopted, under identical classification type, its degree of freedom will expand several times even decades of times, solve in large scale, and computing is very complicated, cannot realize efficient computing.
Summary of the invention
The object of the present invention is to provide a kind of method assessing train and rail system overall dynamics performance rapidly and accurately.
To achieve these goals, the present invention discloses a kind of method for assessment of heavy haul train and Track Coupling System dynamic property, and the method comprises:
Step S1, sets up one dimension heavy haul train kinetic model, and the often joint vehicle in wherein said heavy haul train is by reflecting that the simple substance point auto model of longitudinal direction of car dynamic characteristic represents, described vehicle comprises locomotive and lorry; Hitch between vehicle represents the hitch longitudinal force computation model by reflection hitch longitudinal force, and described hitch comprises locomotive coupler buffering device and lorry coupler buffering device;
Step S2, setting heavy haul train operating condition, calculates the longitudinal coupler force between the vehicle setting described heavy haul train under operating condition based on described one dimension heavy haul train kinetic model;
Step S3, determine the position occurring maximum longitudinal coupler force, and contiguous for this position at least three joint vehicles are replaced with represented by three-dimensional vehicle-orbit coupling model, represented replacing with the hitch that three-dimensional vehicle-orbit coupling model is connected by three-dimensional coupler force computation model, to upgrade heavy haul train kinetic model;
Step S4, based on the dynamic index of heavy haul train dynamics calculation described heavy haul train and the track under described setting operating condition after renewal, assesses the dynamic property of setting operating condition Train and Track Coupling System.
Preferably, described heavy haul train operating condition be following in one: train traction starting, train inertia movement, train speed governing braking and Train Stopping braking.
Preferably, also should comprise for different heavy haul train operating condition for assessment of the method for the coupled system dynamic property of heavy haul train and track, repeat above-mentioned steps S2 ~ S4.
Preferably, described three-dimensional vehicle-orbit coupling model includes three-dimensional vehicle model, 3d orbit model and vehicle and interorbital work-force model.
Preferably, described three-dimensional coupler force computation model is simulated the longitudinal coupler force between vehicle, horizontal coupler force and vertical coupler force.
Preferably, for representing that the described three-dimensional vehicle-orbit coupling model of locomotive also can comprise, at least one in following factors is simulated: traction electric machine and wheel between driving force, electric braking force; Drawing pull bar acting force between locomotive and bogie; And wheel is in motion, the driving moment of traction electric machine and electric braking moment and train implement brake shoe pressure, air-making power during air damping.
Preferably, for representing that the described three-dimensional vehicle-orbit coupling model of lorry also can comprise, at least one in following factors is simulated: take turns in motion, train implements brake shoe pressure, air-making power during air damping; And in side frame motion, the supporting role of cross support pull bar.
Preferably, expression sharp radius curve track section can be adopted, there is the model trajectory of track structure defect track section or track deterioration track section as the model trajectory in described vehicle-orbit coupling model.
Preferably, described dynamic index comprises following part or all of parameter: Vehicular vibration acceleration, derailment coefficients, wheel-rail force, sleeper support reaction, the dynamic extensive magnitude of gauge, railway roadbed and the end face stress of roadbed and the displacement of rail, sleeper and railway roadbed and acceleration.
Pass through technique scheme, by by three-dimensional vehicle-orbit coupling models applying in the key position of heavy haul train kinetic model, the present invention more accurately can reflect the relation of slack action effect, vehicle and rail interaction, simulate other vehicles in heavy haul train and the coupler force between other vehicles with simple substance point auto model and hitch longitudinal force computation model simultaneously, thus taken into account System Performance Analysis accuracy and arithmetic speed.The present invention also can carry out corresponding simulation according to the different operating conditions of heavy haul train, to improve specific aim and the applicability of System Performance Analysis further.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 shows according to the process flow diagram of embodiment of the present invention for assessment of heavy haul train and Track Coupling System dynamic property;
Fig. 2 shows the schematic diagram carrying Modeling Method for Train Dynamics according to the Three-dimensional Gravity of embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality used such as " longitudinal direction " is often referred to the direction of heavy haul train advance, and " transverse direction " is often referred to direction vertical with above-mentioned " longitudinal direction " in the horizontal direction, and " vertical " is often referred to direction perpendicular to the ground.
The invention provides a kind of method for assessment of heavy haul train and Track Coupling System dynamic property.According to the method, can first based on simple heavy haul train Longitudinal Dynamic Model, determine the key position needing to pay close attention to fast, then the naive model at key position place is replaced with more accurate complicated multidimensional model, thus take into account accuracy and the assess effectiveness of System Performance Analysis.
Fig. 1 shows according to the process flow diagram of embodiment of the present invention for assessment of heavy haul train and Track Coupling System dynamic property.
In step sl, one dimension heavy haul train Longitudinal Dynamic Model is set up.Train marshalling list and the track data of simulation calculation can be set according to the heavy haul train classification type of reality and train operation line condition.Wherein, for realizing quick calculating, each locomotive and the lorry of composition heavy haul train all represent with simple substance point auto model, and this simple substance point auto model only can reflect the longitudinal dynamics feature of vehicle; For the hitch that connects Adjacent vehicles to can by only reflecting that the hitch longitudinal force computation model of hitch longitudinal force represents, described hitch comprises locomotive coupler buffering device and lorry coupler buffering device.Therefore, the heavy haul train kinetic model obtained is one dimension heavy haul train Longitudinal Dynamic Model.
Setting up various parameters required in one dimension heavy haul train Longitudinal Dynamic Model and subsequent simulation calculating, traction/the brake parameters of such as locomotive and wheel profile parameter, the friction damper parameter of lorry and the type of brake rigging parameter and impact damper and impedance operator parameter etc., all can obtain from existing auto model storehouse.
In step s 2, setting heavy haul train operating condition, the longitudinal coupler force between each vehicle calculating heavy haul train under this operating condition based on above-mentioned one dimension heavy haul train Longitudinal Dynamic Model.
The ruuning situation of heavy haul train can be divided into some classes, analyze for different ruuning situation respectively, to obtain comprehensive system performance.Through a large amount of research and practice, the heavy haul train ruuning situation paid close attention to is summarized as following four classes by inventor: train traction starting, train inertia movement, train speed governing braking and Train Stopping braking.Therefore, preferably, the heavy haul train operating condition in emulation can be set to corresponding with above-mentioned a certain ruuning situation according to emulation object.Wherein, under train traction starting conditions, can arrange train initial launch speed is 0, and arranges train starting working time; Under train inertia movement condition, initial launch speed and the working time of train can be set; Under train speed governing braking condition, the initial launch speed that train can be set and the target velocity that need be reduced to; Under Train Stopping braking condition, the initial launch speed of train can be set.
Any means that those skilled in the art can be used to know calculates the longitudinal coupler force between each vehicle of heavy haul train under this service condition, be triggered until calculate termination condition, such as, when train traction starting or train inertia movement, can stop calculating after train operation reaches corresponding duration; When train speed governing braking and Train Stopping braking, can stop calculating after the travelling speed of train reaches respective objects speed.
In step s3, determine the position occurring maximum longitudinal coupler force, and will represent that the model of this position adjacent vehicle replaces with three-dimensional vehicle-orbit coupling model from simple substance point auto model, the hitch be connected with the three-dimensional vehicle-orbit coupling model after replacement is replaced with three-dimensional coupler force computation model from longitudinal coupler force computation model, carries Modeling Method for Train Dynamics so that one dimension heavy haul train Longitudinal Dynamic Model is updated to Three-dimensional Gravity.
Any means well known by persons skilled in the art can be adopted to determine to occur maximum longitudinal coupler force position in heavy haul train.Three-dimensional Gravity after Fig. 2 shows renewal carries the schematic diagram of Modeling Method for Train Dynamics.P point in Fig. 2 corresponds to the position based on the maximum longitudinal coupler force of the determined appearance of one dimension heavy haul train Longitudinal Dynamic Model.
In order to can accurately solve, need to save vehicle by adjacent with the position (as P point in Fig. 2) of the maximum longitudinal coupler force of appearance at least three and replace with three-dimensional vehicle-orbit coupling model, to eliminate the effect of restraint that simple substance point auto model is around formed concern place lateral direction of car and catenary motion; And replace with three-dimensional coupler force computation model by with the hitch that three-dimensional vehicle-orbit coupling model is connected.
Described three-dimensional vehicle-orbit coupling model can include three-dimensional vehicle model, 3d orbit model and vehicle and interorbital work-force model.Described three-dimensional vehicle-orbit coupling model can reflect the vibration along all directions of vehicle and track, and vehicle and interorbital interaction.
Preferably, inventor carries out following improvement to existing three-dimensional vehicle-orbit coupling model, is applicable to emulate heavy haul train, and improves the accuracy of simulation result to make it:
(1) if simulation object is locomotive 2, then in existing three-dimensional vehicle-model trajectory, the simulation to following elements is increased:
Traction electric machine and wheel between driving force, electric braking force;
Drawing pull bar acting force between locomotive and bogie;
Take turns in motion, the driving moment of traction electric machine and electric braking moment and train implement brake shoe pressure, air-making power during air damping;
(2) if simulation object is lorry 1, then in existing three-dimensional vehicle-model trajectory, the simulation to following elements is increased:
Take turns in motion, train implements brake shoe pressure, air-making power during air damping;
In side frame motion, the supporting role of cross support pull bar.Preferably, in simulations, heavy haul train position can be placed in the track section place paid close attention to, such as, expression sharp radius curve track section can be chosen from model trajectory storehouse, there is the model trajectory of track structure defect track section or track deterioration track section as the 3d orbit model in three-dimensional vehicle-orbit coupling model.3d orbit model also can comprise corresponding track irregularity data.
Described three-dimensional coupler force computation model can not only reflect the longitudinal coupler force between vehicle, can also reflect the horizontal coupler force between vehicle and vertical coupler force.Two save the hitch pair between the vehicle of three-dimensional vehicle-orbit coupling model representation, and one the vehicle and saving three-dimensional vehicle-orbit coupling model representation save hitch pair between vehicle that simple substance point auto model represents, all can be replaced by three-dimensional coupler force model.
The vehicle fleet size being replaced by three-dimensional vehicle-orbit coupling model is more, then simulation result is more accurate, and correspondingly, computation complexity is also higher.If select three models that save vehicle contiguous with there is maximum longitudinal coupler force position (such as P point) to replace, then this three joints vehicle can be two joints in this front, position and a joint vehicle at rear, or a joint vehicle in two joints at this rear, position and front.
As shown in Figure 2, Three-dimensional Gravity after renewal carries in Modeling Method for Train Dynamics, except the vehicle (namely above-mentioned adjacent with the position of the maximum longitudinal coupler force of appearance at least three save vehicle) and hitch that need pay close attention to position are external, other vehicles and hitch are to can still represent with simple substance point auto model and longitudinal coupler force computation model, to reduce calculated amount and the complexity of system solution, accelerate computing velocity.
Get back to Fig. 1, in step s 4 which, can carry based on the Three-dimensional Gravity after upgrading the dynamic index that Modeling Method for Train Dynamics calculates heavy haul train and track under corresponding operating condition, assess the dynamic property of heavy haul train and Track Coupling System, this dynamic property comprises heavy haul train and interorbital interaction.Train operation condition can be set, and be identical with the operating condition set in step S2 by train handling condition setting, then Modeling Method for Train Dynamics can be carried based on the Three-dimensional Gravity after renewal, any technological means utilizing those skilled in the art to know, calculate the Vehicular vibration acceleration in this coupled system, derailment coefficients, wheel-rail force, sleeper support reaction, the dynamic extensive magnitude of gauge, railway roadbed and the end face stress of roadbed and the index such as the displacement of rail, sleeper and railway roadbed and acceleration, thus assess the performance of the system of this heavy haul train and track composition.
Preferably, can for different heavy haul train operating conditions, repeated execution of steps S2 ~ S4, to assess the system performance under different operating condition, thus obtains the comprehensive data relevant to this system performance.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out combination in any between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (9)
1., for assessment of a method for heavy haul train and Track Coupling System dynamic property, the method comprises:
Step S1, sets up the heavy haul train kinetic model of one dimension, and the often joint vehicle in wherein said heavy haul train is by reflecting that the simple substance point auto model of longitudinal direction of car dynamic characteristic represents, described vehicle comprises locomotive and lorry; Hitch between vehicle represents the hitch longitudinal force computation model by reflection hitch longitudinal force, and described hitch comprises locomotive coupler buffering device and lorry coupler buffering device;
Step S2, setting heavy haul train operating condition, calculates the longitudinal coupler force between the vehicle setting described heavy haul train under operating condition based on described one dimension heavy haul train kinetic model;
Step S3, determine the position occurring maximum longitudinal coupler force, and contiguous for this position at least three joint vehicles are replaced with represented by three-dimensional vehicle-orbit coupling model, represented replacing with the hitch that three-dimensional vehicle-orbit coupling model is connected by three-dimensional coupler force computation model, to upgrade heavy haul train kinetic model;
Step S4, based on the dynamic index of heavy haul train dynamics calculation described heavy haul train and the track under described setting operating condition after renewal, assesses the dynamic property of described setting operating condition Train and Track Coupling System.
2. the method for assessment of heavy haul train and Track Coupling System dynamic property according to claim 1, wherein, described heavy haul train operating condition be following in one: train traction starting, train inertia movement, train speed governing braking and Train Stopping braking.
3. the method for assessment of heavy haul train and Track Coupling System dynamic property according to claim 1 and 2, also comprises for different heavy haul train operating condition, repeated execution of steps S2 ~ S4.
4. the method for the coupled system dynamic property for assessment of heavy haul train and track according to claim 1, wherein, described three-dimensional vehicle-orbit coupling model includes three-dimensional vehicle model, 3d orbit model and vehicle and interorbital work-force model.
5. the method for assessment of heavy haul train and Track Coupling System dynamic property according to claim 1, wherein, described three-dimensional coupler force computation model is simulated the longitudinal coupler force between vehicle, horizontal coupler force and vertical coupler force.
6. the method for assessment of heavy haul train and Track Coupling System dynamic property according to claim 1, wherein, for representing that the described three-dimensional vehicle-orbit coupling model of locomotive also comprises, at least one in following factors is simulated:
Traction electric machine and wheel between driving force, electric braking force;
Drawing pull bar acting force between locomotive and bogie;
Take turns in motion, the driving moment of traction electric machine and electric braking moment and train implement brake shoe pressure, air-making power during air damping.
7. the method for assessment of heavy haul train and Track Coupling System dynamic property according to claim 1, wherein, for representing that the described three-dimensional vehicle-orbit coupling model of lorry also comprises, at least one in following factors is simulated:
Take turns in motion, train implements brake shoe pressure, air-making power during air damping;
In side frame motion, the supporting role of cross support pull bar.
8. the method for assessment of heavy haul train and Track Coupling System dynamic property according to claim 1, wherein, adopt expression sharp radius curve track section, there is the model trajectory of track structure defect track section or track deterioration track section as the model trajectory in described vehicle-orbit coupling model.
9. the method for assessment of heavy haul train and Track Coupling System dynamic property according to claim 1, described dynamic index comprises following part or all of parameter: Vehicular vibration acceleration, derailment coefficients, wheel-rail force, sleeper support reaction, the dynamic extensive magnitude of gauge, railway roadbed and the end face stress of roadbed and the displacement of rail, sleeper and railway roadbed and acceleration.
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| CN111177856B (en) * | 2019-12-13 | 2023-10-27 | 西南交通大学 | Locomotive dynamics simulation analysis method and device based on electromechanical coupling of driving system |
| CN111591318A (en) * | 2020-05-12 | 2020-08-28 | 中铁三局集团有限公司 | Heavy haul train locomotive dynamics monitoring devices |
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| CN117698808B (en) * | 2024-02-05 | 2024-05-03 | 西南交通大学 | Large-scale heavy-load train group operation control method integrating longitudinal dynamics of trains |
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