CN113609438A - Method and system for calculating safe loading size of goods passing curve of railway drop-hole car - Google Patents

Method and system for calculating safe loading size of goods passing curve of railway drop-hole car Download PDF

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Publication number
CN113609438A
CN113609438A CN202110980739.3A CN202110980739A CN113609438A CN 113609438 A CN113609438 A CN 113609438A CN 202110980739 A CN202110980739 A CN 202110980739A CN 113609438 A CN113609438 A CN 113609438A
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center
distance
bogie
curve
goods
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周伟
肖合婷
梁习锋
张强
方聪聪
刘项
刘东润
鲁寨军
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Central South University
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Central South University
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes

Abstract

The invention discloses a method and a system for calculating the safe loading size of a railway drop-hole car passing curve, which comprises the steps of obtaining the center plate parameter, the bogie parameter and the curvature parameter of the curve to be passed of the drop-hole car; based on the geometric relationship among all center plates, bogies and circle centers of curves to be passed of the hole car, calculating the longitudinal distance between the center plate of the bogie at the inner end of the near goods and the center of the goods and the longitudinal size of the half-width convex part of the bogie caused by the relative deflection angle of the near goods bogie and the horizontal goods according to the center plate parameters, the bogie parameters and the curvature parameters, and determining the minimum allowable distance between the inner angle of the bogie at the near goods end of the hole car and the end part of the goods; and determining the safe loading size of the goods of the hole car based on the minimum allowable distance, the longitudinal size and the longitudinal distance, and controlling the size of the goods of the hole car to be in the safe loading size when the hole car passes through the curve to be passed, so that the safety of the hole car when the hole car passes through the curve is ensured.

Description

Method and system for calculating safe loading size of goods passing curve of railway drop-hole car
Technical Field
The invention relates to the technical field of goods transportation of a hole car, in particular to a method and a system for calculating the safe loading size of goods passing curves of a railway hole car.
Background
When the curve is crossed, in order to relieve the large hole-dropping vehicle from deviating towards the inner side of the curve in the large vehicle body, the bogie of the hole-dropping vehicle is usually rotated to reduce the deviation of the vehicle body towards the inner side; however, when loading goods, if the distance between the goods and the bogie is too short, the rotation of the bogie is easy to collide with the goods when passing a curve, so that the damage of the car falling into the hole or the damage of the goods is caused, and the transportation safety of the car falling into the hole is further influenced.
Disclosure of Invention
The invention provides a method and a system for calculating the safe loading size of cargoes passing a curve of a railway drop hole car, which are used for solving the technical problem that the conventional drop hole car easily causes potential safety hazards when passing the curve due to the fact that the size of the cargoes transported is too large.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a method for calculating the safe loading size of cargoes passing curves of a railway drop hole car comprises the following steps:
acquiring a center plate parameter, a bogie parameter and a curvature parameter of a curve to be passed of the hole-dropping vehicle;
based on the geometric relationship among all center plates, bogies and circle centers of curves to be passed of the hole car, calculating the longitudinal distance between the center plate of the bogie at the inner end of the near goods and the center of the goods and the longitudinal size of the half-width convex part of the bogie caused by the relative deflection angle of the near goods bogie and the horizontal goods according to the center plate parameters, the bogie parameters and the curvature parameters, and determining the minimum allowable distance between the inner angle of the bogie at the near goods end of the hole car and the end part of the goods;
and determining the safe loading size of the goods of the drop-off hole car based on the minimum allowable distance, the longitudinal size and the longitudinal distance, and controlling the size of the goods of the drop-off hole car to be within the safe loading size when the drop-off hole car drives through the curve to be passed.
Preferably, the parameters of the core disc comprise half-length L of the core disc space of the small underframeSFMiddle bottom frame center plate interval half-length LMFThe offset delta of the theoretical center of the guiding rotary center and the corresponding underframe and the distance x between the guiding rotary centers; the bogie parameters include bogie half-length LBAnd a half width W of the bogieBThe curvature parameter of the curve to be crossed is the radius R of the curve to be crossedSF。
Preferably, the method for calculating the longitudinal distance between the bogie center plate at the inner end of the near cargo and the center of the cargo and the longitudinal size of the half-width convex part of the bogie caused by the relative deflection angle of the near cargo bogie and the horizontal cargo according to the center plate parameter, the bogie parameter and the curvature parameter comprises the following steps:
according to the half-length L of the distance between the small chassis and the central discSFMiddle bottom frame center plate interval half-length LMFAnd radius R of the curve to be passedSFCalculating a first included angle theta formed by the center of the small underframe center plate, the center of the curve to be crossed and the middle point of the distance between the small underframe center platesSFA second included angle theta formed by the center of the middle sole frame center plate, the circle center of the curve to be crossed and the middle point of the distance between the middle sole frame center platesMFAnd a first distance R between the large chassis center plate and the center of the curve to be passedLF(ii) a Wherein the second included angle thetaMFA first included angle thetaSFThe circle center of the curve to be passed is taken as a vertex;
determining a guiding mode of the vehicle passing through a curve to be passed through of the drop hole, and determining the offset delta between the corresponding guiding rotation center and the theoretical center of the middle chassis, the distance x between the corresponding guiding rotation centers and the first distance R according to the guiding modeLFCalculate big chassis center disc interval half-length L of car of falling into holeLF；
Half-length L based on large underframe center plate distanceLFA first distance RLFA first included angle thetaSFA second angle thetaMFAnd radius R of the curve to be passedSFCalculating the longitudinal distance D between the bogie center plate near the inner end of the goods and the center of the goodsBT_C；
According to the first included angle thetaSFA second angle thetaMFAnd a half width W of the bogieBCalculating the relative deflection angle theta between the bogie and the horizontal goodsRResulting in a longitudinal dimension D of the half-width nose of the bogieB_R。
Preferably, half the length L according to the small chassis center-to-center distanceSFMiddle bottom frame center plate interval half-length LMFAnd radius R of the curve to be passedSFCalculating a first included angle theta formed by the center of the small underframe center plate, the center of the curve to be crossed and the middle point of the distance between the small underframe center platesSFA second included angle theta formed by the center of the middle sole frame center plate, the circle center of the curve to be crossed and the middle point of the distance between the middle sole frame center platesMFAnd a first distance R between the large chassis center plate and the center of the curve to be passedLFThe method comprises the following steps:
based on the small chassis center plate on the curve to be crossed, the distance between the small chassis center plates is half-long LSFAnd radius R of the curve to be passedSFCalculating a first included angle theta formed by the center of the small underframe center plate, the center of the curve to be crossed and the middle point of the distance between the small underframe center platesSF：
θSF＝sin-1(LSF/RSF)；
Based on the coincidence of the middle points of the distances between the center plate of the middle chassis and the center plate of the small chassis and the first included angle thetaSFAnd a radius R of the curve to be passedSFCalculating a second distance R between the center disk of the middle sole frame and the circle center of the curve to be passedMF：
RMF＝RSF·cosθSF；
According to the second distance RMFAnd half-length L of distance between center plates of middle sole frameMFCalculating a second included angle theta formed by the center of the middle bottom frame center plate, the circle center of the curve to be crossed and the middle point of the distance between the middle bottom frame center platesMF：
θMF＝sin-1(LMF/RMF)；
Based on the coincidence of the middle points of the distances between the large underframe center plate and the middle underframe center plate and the second included angle thetaMFAnd a second distance RMFCalculating a first distance R between the central disk of the large underframe and the circle center of the curve to be crossedLF：
RLF＝RMF·cosθMF。
Preferably, the guiding mode comprises an outer guiding mode, a middle guiding mode and an inner guiding mode; according to the offset delta between the corresponding guide rotation center and the theoretical center of the middle chassis, the corresponding guide rotation center distance x and the first distance RLFCalculate big chassis center disc interval half-length L of car of falling into holeLFThe formula is as follows:
Figure BDA0003229015180000021
the offset between the outer guide rotation center and the theoretical center of the middle chassis is deltaLF_EX(ii) a The distance between the outer guide rotary centers is 2LLF_EX(ii) a The offset between the center of rotation of the middle guide and the theoretical center of the middle chassis is set to be deltaLF_MD(ii) a The distance between the center of rotation of the center guide is 2LLF_MD(ii) a Setting the offset between the inner guiding rotation center and the theoretical center of the middle chassis as deltaLF_IN(ii) a The distance between the inner guide rotary centers is set to be 2LLF_IN(ii) a When the guiding mode is external guiding, x ═ L in the formulaLF_EX、Δ＝ΔLF_EX(ii) a When the guidance mode is center guidance, x ═ L in the formulaLF_MD、Δ＝ΔLF_MD(ii) a When the guiding mode is internal guiding, x is LLF_IN、Δ＝ΔLF_IN。
Preferably, based on the half-length L of the distance between the center plates of the big underframeLFA first distance RLFA first included angle thetaSFA second angle thetaMFAnd radius R of the curve to be passedSFCalculating the longitudinal distance D between the bogie center plate near the inner end of the goods and the center of the goodsBT_CThe method comprises the following steps:
according to the half-length L of the distance between the large underframe core platesLFFirst distanceFrom RLFCalculating a third included angle theta formed by the center of the large chassis center plate, the circle center of the curve to be passed and the middle point of the distance between the large chassis center platesLFWherein the third angle thetaLFTaking the circle center of the curve to be passed as a vertex:
θLF＝sin-1(LLF/RLF)；
according to the first included angle thetaSFA second angle thetaMFAnd a third angle thetaLFCalculating a fourth included angle theta between a line connecting the circle center and the inner end small underframe center plate and a line connecting the circle center and the car center, wherein the calculation formula is as follows:
θ＝θLF-(θSF+θMF)；
according to the fourth included angle theta and the radius R of the curve to be crossedSFCalculating the longitudinal distance D between the bogie center plate near the inner end of the goods and the center of the goodsBT_C：
DBT_C＝RSF·sinθ。
Preferably, according to the first included angle thetaSFA second angle thetaMFAnd a half width W of the bogieBCalculating the longitudinal dimension D of the half-width projection of the bogie due to the relative yaw angle of the near cargo bogie to the horizontal cargoB_RThe method comprises the following steps:
according to the first included angle thetaSFAnd a second angle thetaMFCalculating the relative included angle theta between the connecting line of the small chassis center plates of the near goods and the large chassisR：
θR＝θLF-θMF；
According to the relative included angle theta between the connecting line of the small chassis center plate of the near goods and the large chassisRAnd a half width W of the bogieBCalculating the longitudinal dimension D of the half-width projection of the bogie due to the relative yaw angle of the near cargo bogie to the horizontal cargoB_R：
DB_R＝WB·sinθR。
Preferably, the safe loading size of the goods of the dropped-down hole car is determined based on the minimum allowable distance, the longitudinal dimension and the longitudinal distance, and is realized by the following formula:
DBT≤DBT_E-DB_R；
DBT_E＝DBT_C-(LT+LB)；
wherein D isBTIs a minimum allowable distance, DB_RLongitudinal dimension of the truck half-width projection due to the relative yaw angle of the near cargo truck to the horizontal cargo, DBT_EIs close to the distance between the end of the goods bogie and the midpoint of the end of the goods, LTIs half the length of the cargo, LBApproximately half as long as the cargo bogie.
Preferably, the safe loading size of the goods of the dropped-down hole car is determined based on the minimum allowable distance, the longitudinal dimension and the longitudinal distance, and is realized by the following formula:
DBT≤DBT_E-DB_R-DB_RAMP-DB_GAP；
DBT_E＝DBT_C-(LT+LB)；
wherein D isBTIs a minimum allowable distance, DB_RLongitudinal dimension of the truck half-width projection due to the relative yaw angle of the near cargo truck to the horizontal cargo, DBT_EIs close to the distance between the end of the goods bogie and the midpoint of the end of the goods, LTIs half the length of the cargo, LBApproximately half a length of the cargo bogie, DB_RAMPThe amount of inclination of the bogie to the load due to the difference in height and inclination angle of the ramp and the straight road, DB_GAPThe total clearance of the bogie center plates at one end of the goods.
A computer system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the steps of the method being performed when the computer program is executed by the processor.
The invention has the following beneficial effects:
1. according to the method and the system for calculating the safe loading size of the goods passing through the curve of the railway drop-hole car, the center plate parameter, the bogie parameter and the curvature parameter of the curve to be passed of the drop-hole car are obtained; based on the geometric relationship among all center plates, bogies and circle centers of curves to be passed of the hole car, calculating the longitudinal distance between the center plate of the bogie at the inner end of the near goods and the center of the goods and the longitudinal size of the half-width convex part of the bogie caused by the relative deflection angle of the near goods bogie and the horizontal goods according to the center plate parameters, the bogie parameters and the curvature parameters, and determining the minimum allowable distance between the inner angle of the bogie at the near goods end of the hole car and the end part of the goods; and determining the safe loading size of the goods of the hole car based on the minimum allowable distance, the longitudinal size and the longitudinal distance, and controlling the size of the goods of the hole car to be in the safe loading size when the hole car passes through the curve to be passed, so that the safety of the hole car when the hole car passes through the curve is ensured.
2. In the preferred scheme, the safe loading size of the goods of the hole car is solved through a simple geometric mathematical model, and the solving speed can be greatly improved.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the structure of the undercarriage of each layer of the drop hole car in the preferred embodiment of the present invention;
FIG. 2 is a geometric diagram of the center disk point space of each stage of the chassis of the curve line in the preferred embodiment of the present invention;
FIG. 3 is a geometric relationship between various guides and theoretical center points of a large chassis in a preferred embodiment of the present invention;
fig. 4 is a flow chart of a method for calculating the safe loading size of the railway drop-hole car-passing curve in the preferred embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
The first embodiment is as follows:
as shown in fig. 4, the present embodiment discloses a method for calculating a safe loading size of a railway drop-hole car passing curve, which includes the following steps:
acquiring a center plate parameter, a bogie parameter and a curvature parameter of a curve to be passed of the hole-dropping vehicle;
based on the geometric relationship among all center plates, bogies and circle centers of curves to be passed of the hole car, calculating the longitudinal distance between the center plate of the bogie at the inner end of the near goods and the center of the goods and the longitudinal size of the half-width convex part of the bogie caused by the relative deflection angle of the near goods bogie and the horizontal goods according to the center plate parameters, the bogie parameters and the curvature parameters, and determining the minimum allowable distance between the inner angle of the bogie at the near goods end of the hole car and the end part of the goods;
and determining the safe loading size of the goods of the drop-off hole car based on the minimum allowable distance, the longitudinal size and the longitudinal distance, and controlling the size of the goods of the drop-off hole car to be within the safe loading size when the drop-off hole car drives through the curve to be passed.
In addition, in the embodiment, a computer system is also disclosed, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the computer program, the steps of the method are implemented.
According to the method and the system for calculating the safe loading size of the goods passing through the curve of the railway drop-hole car, the center plate parameter, the bogie parameter and the curvature parameter of the curve to be passed of the drop-hole car are obtained; based on the geometric relationship among all center plates, bogies and circle centers of curves to be passed of the hole car, calculating the longitudinal distance between the center plate of the bogie at the inner end of the near goods and the center of the goods and the longitudinal size of the half-width convex part of the bogie caused by the relative deflection angle of the near goods bogie and the horizontal goods according to the center plate parameters, the bogie parameters and the curvature parameters, and determining the minimum allowable distance between the inner angle of the bogie at the near goods end of the hole car and the end part of the goods; and determining the safe loading size of the goods of the hole car based on the minimum allowable distance, the longitudinal size and the longitudinal distance, and controlling the size of the goods of the hole car to be in the safe loading size when the hole car passes through the curve to be passed, so that the safety of the hole car when the hole car passes through the curve is ensured.
Example two:
the second embodiment is the preferred embodiment of the first embodiment, and the difference between the first embodiment and the second embodiment is that the working principle and the specific steps of the method for calculating the safe loading size of the goods passing curves of the railway drop-hole car are refined, and the method comprises the following steps:
in this embodiment, the working principle of the method for calculating the safe loading size of the goods passing through the curve of the railway drop-hole car is as follows:
the goods transported by the hole-dropping vehicle are transformers, the structure of each layer of underframe of the hole-dropping vehicle is shown in figures 1-2, and the distance between the center plates of the small underframe of the hole-dropping vehicle is 2LSFThe distance between the middle sole frame center plates is 2LMFThe distance between the large underframe core plates is 2LLF(assuming that the large chassis center is located at the theoretical midpoint of the middle chassis center line), the transformer length is defined as 2LTThe width is defined as 2WTRadius of line curve RSF(where R isSF180m) and a bogie length of 2LBThe width of the bogie is 2WB. On the curve line, the central wheel of each bogie of the hole-dropping car falls on the arc, the center plate of the middle underframe falls on the midpoint position of the connecting line of the center plates of the small underframe, the midpoint of the connecting line of the center plates of the middle underframe is defined as the theoretical center plate position of the large underframe, and the distance between the center plates of the large underframe is 2LLFAnd the unknown quantity is subjected to inverse calculation according to the offset of the outer guide, the middle guide, the inner guide and the central point and the distance between the rotation centers. In the derivation process of the following formula, firstly, a parameterized model is calculated according to the center-to-center distance of a theoretical center plate of a large underframe, and the distance between the goods and a bogie is decomposed into two parts: one is the distance between the center point of the end part of the transformer and the center point of the end part of the bogie; the second is the size of the semi-width bulge of the bogie after the bogie deflects relative to the transformer;
on the small chassis center plate half-connecting line LSFIn a right triangle formed with the center of the circle, there are
θSF＝sin-1(LSF/RSF) (1)
RMF＝RSF·cosθSF (2)
In the middle of the skeleton center plate half-line LMFIn a right triangle formed with the center of the circle, there are
θMF＝sin-1(LMF/RMF) (3)
RLF＝RMF·cosθMF (4)
On the semi-connecting line L of the theoretical center plate of the big underframeLFIn a right triangle formed with the center of the circle, there are
θLF＝sin-1(LLF/RLF) (5)
Wherein L isLFThe acquisition steps are as follows:
after considering the external guidance, the middle guidance and the internal guidance modes of the overrun truck, the relevant parameters are defined as follows:
offset of the outer guide rotation center and the theoretical center of the middle chassis: deltaLF_EX；
Outer guiding rotation center distance: 2L ofLF_EX；
Offset of the center of rotation of the middle guide and the theoretical center of the middle chassis: deltaLF_MD；
Center guide rotation center distance: 2L ofLF_MD；
Offset of the inner guide rotation center and the theoretical center of the middle chassis: deltaLF_IN；
Inner guide rotation center distance: 2L ofLF_IN。
In fig. 2, the trapezoids corresponding to the theoretical center plate of the large chassis and the center of rotation of outer guide/middle guide/inner guide are extracted, and the formed geometric relationship is shown in fig. 3.
According to the similarity criterion of angle complementation and isosceles trapezoid, there are.
LLF_EX＝LLF-ΔLF_EX·cosθLF (6)
LLF_MD＝LLF-ΔLF_MD·cosθLF (7)
LLF_IN＝LLF-ΔLF_IN·cosθLF (8)
The simultaneous formula (5) and the formulas (6), (7) and (8) can solve and inversely calculate the theoretical center-disk distance of the large underframe through a quadratic equation system of unitary elements as follows:
Figure BDA0003229015180000061
in the formula, when the external guide is carried out: x ═ LLF_EX、Δ＝ΔLF_EX(ii) a During the middle guide: x ═ LLF_MD、Δ＝ΔLF_MD(ii) a During internal guiding: x ═ LLF_IN、Δ＝ΔLF_IN。
According to the geometric symmetry, the included angle theta between the connecting line of the circle center and the small underframe center plate at the inner end and the connecting line of the circle center and the car center is as follows:
θ＝θLF-(θSF+θMF) (10)
the distance between the bogie center plate close to the inner end of the goods and the center of the goods is as follows:
DBT_C＝RSF·sinθ (11)
considering the transformer and the half-length of the bogie, the distance between the end part of the bogie and the midpoint of the end part of the transformer is as follows:
DBT_E＝DBT_C-(LT+LB) (12)
the other part of the semi-wide protruding part of the bogie caused by the relative deflection angle between the near cargo bogie and the horizontal cargo needs to pass through the deflection angle thetaRAnd (6) performing calculation. The relative included angle between the connecting line of the small chassis center plate of the near goods and the large chassis is as follows:
θR＝θLF-θMF (13)
the dimensions of the truck half-width deflector ledge were:
DB_R＝WB·sinθR (14)
and (5) calculating the minimum distance between the inner angle of the bogie at the end close to the cargo end and the end part of the transformer by the steps (8) and (10) as follows:
DBT＝DBT_E-DB_R (15)
based on the above principle, in the embodiment, a method for calculating the safe loading size of the goods passing through the curve of the railway drop hole car is disclosed, which comprises the following steps:
based on the small chassis center plate is on the curve to be passed, the distance between the small chassis center plates is half the length LSFAnd radius R of the curve to be passedSFCalculating a first included angle theta formed by the center of the small underframe center plate, the center of the curve to be crossed and the middle point of the distance between the small underframe center platesSF：
θSF＝sin-1(LSF/RSF)；
Based on the coincidence of the middle points of the distances between the middle chassis center plate and the small chassis center plate, passing through the first included angle thetaSFAnd a radius R of the curve to be passedSFCalculating a second distance R between the center disk of the central chassis and the center of the curve to be crossedMF：
RMF＝RSF·cosθSF；
According to the second distance RMFAnd half-length L of distance between center plates of middle sole frameMFCalculating a second included angle theta formed by the center of the middle bottom frame center plate, the circle center of the curve to be crossed and the middle point of the distance between the middle bottom frame center platesMF：
θMF＝sin-1(LMF/RMF)；
Based on the coincidence of the middle points of the distances between the large underframe center plate and the middle underframe center plate, passing through the second included angle thetaMFAnd the second distance RMFCalculating the center of the big chassis and theA first distance R between the centers of circles of the curves to be crossedLF：
RLF＝RMF·cosθMF。
Determining a guiding mode of the drop hole car for passing through the curve to be passed, and determining a distance x between corresponding guiding rotation centers and a theoretical center of the middle chassis according to a deviation amount delta between the corresponding guiding rotation centers of the guiding modes and the theoretical center of the middle chassis, and the first distance RLFCalculating half-length L of center plate interval of large underframe of the hole-dropping vehicleLF(ii) a Wherein the guiding mode comprises an outer guiding mode, a middle guiding mode and an inner guiding mode; according to the offset delta between the corresponding guide rotation center and the theoretical center of the middle chassis, the corresponding guide rotation center distance x and the first distance RLFCalculating half-length L of center plate interval of large underframe of the hole-dropping vehicleLFThe formula is as follows:
Figure BDA0003229015180000081
according to the half-length L of the distance between the large underframe core platesLFA first distance RLFCalculating a third included angle theta formed by the center of the large chassis center plate, the circle center of the curve to be passed and the middle point of the distance between the large chassis center platesLFWherein the third angle thetaLFTaking the circle center of the curve to be passed as a vertex:
θLF＝sin-1(LLF/RLF)；
according to the first included angle thetaSFA second angle thetaMFAnd a third angle thetaLFCalculating a fourth included angle theta between a line connecting the circle center and the inner end small underframe center plate and a line connecting the circle center and the car center, wherein the calculation formula is as follows:
θ＝θLF-(θSF+θMF)；
according to the fourth included angle theta and the radius R of the curve to be passedSFCalculating the longitudinal distance D between the bogie center plate near the inner end of the goods and the center of the goodsBT_C：
DBT_C＝RSF·sinθ；
According to the first included angle thetaSFAnd a second angle thetaMFCalculating the relative included angle theta between the connecting line of the small chassis center plates of the near goods and the large chassisR：
θR＝θLF-θMF；
According to the relative included angle theta between the connecting line of the small chassis center plates close to the goods and the large chassisRAnd a half width W of the bogieBCalculating the longitudinal dimension D of the half-width projection of the bogie due to the relative yaw angle of the near cargo bogie to the horizontal cargoB_R：
DB_R＝WB·sinθR。
Based on the minimum allowable distance DBTLongitudinal dimension DB_RAnd a longitudinal distance DBT_CDetermining a safe loading dimension L of the goods of the drop-down hole carTControlling the size of the goods falling into the hole car within the safe loading size when the car passes through the curve to be passed;
wherein the safe loading size of the goods of the drop-down hole car is determined based on the minimum allowable distance, the longitudinal dimension and the longitudinal distance, and is realized by the following formula:
DBT≤DBT_E-DB_R；
DBT_E＝DBT_C-(LT+LB)；
wherein D isBTIs the minimum allowable distance, DB_RLongitudinal dimension of the truck half-width projection due to the relative yaw angle of the near cargo truck to the horizontal cargo, DBT_EIs close to the distance between the end of the goods bogie and the midpoint of the end of the goods, LTIs half the length of the cargo, LBApproximately half as long as the cargo bogie.
As a preferable solution of the above solution, the safe loading size of the dropped-down hole car cargo is determined based on the minimum allowable distance, the longitudinal dimension and the longitudinal distance, and is also realized by the following formula:
DBT≤DBT_E-DB_R-DB_RAMP-DB_GAP；
DBT_E＝DBT_C-(LT+LB)；
wherein D isBTIs the minimum allowable distance, DB_RLongitudinal dimension of the truck half-width projection due to the relative yaw angle of the near cargo truck to the horizontal cargo, DBT_EIs close to the distance between the end of the goods bogie and the midpoint of the end of the goods, LTIs half the length of the cargo, LBApproximately half a length of the cargo bogie, DB_RAMPFor the amount of tilting of the bogie to the load, DB_GAPThe total clearance of the core disc at one end of the goods.
Example three:
the third embodiment is a preferred embodiment of the second embodiment, and comprises the following contents:
for DK36AThe model is a hole-dropping vehicle, and the distance between the center plates of the small underframe is 2LSF4500mm, radius of curvature RSF180m, 2L of middle chassis center-disk distanceMF12450mm, theta can be calculatedSF＝0.716°、RMF＝179986mm、θMF＝1.982°、RLF＝179878mm。
Under the condition of external guiding, the offset delta between the rotation center of the external guiding and the theoretical center of the middle chassisLF_EX50mm, outer guide centre of rotation spacing 2LLF_EXSubstituting 34000mm into equation (9) to calculate LLF＝17049.8mm。
Under the condition of middle guide, the offset delta between the rotation center of the middle guide and the theoretical center of the middle chassisLF_MD5050mm, and middle guide rotation center spacing of 2LLF_MDCalculating L by substituting 12000mm into equation (9)LF＝17027.3mm。
Under the condition of internal guiding, the offset delta between the rotation center of the internal guiding and the theoretical center of the middle chassisLF_IN6850mm, and an internal guide rotation center spacing of 2LLF_INSubstituting 10200mm into equation (9) to calculate LLF＝17019.3mm。
The distances between the bogie center plate near the inner end of the goods and the center of the goods are respectively D through calculationBT_C8606.9mm (outer guide), 8584.4mm (middle guide) and 8576.3mm (inner guide), and calculating the connecting line and the change of the center plate of the small chassis of the near goodsThe pressure device has a relative deflection angle thetaRKnown bogie widths of 2W are 3.46 ° (outer guide), 3.45 ° (middle guide), 3.45 ° (inner guide)B2200mm, calculated as the truck half-width deflection nose dimension DB_R＝WB·sinθR66.3mm (outer guide), 66.2mm (middle guide), 66.1mm (inner guide).
In addition, considering the height difference and the inclination angle of the front end bogie and the rear end bogie of the hole car on the ramp and the straight road respectively, the height of the bogie is about 750mm, the front end bogie enters a 20 per mill vertical curve, and the bogie inclines to the goods DB_RAMP15 mm; considering the clearance between the core plates of the chassis at each layer, the clearance between the bogie and the core plate of the small chassis is 3.5mm, the clearance between the small chassis and the core plate of the middle chassis is 2.7mm, the clearance between the core plates of the middle chassis and the large chassis is 3.25mm, the total clearance between the core plates at one end of the transformer only influences the longitudinal movement of goods, and the total clearance is marked as DB_GAPThe thickness of (4 · 3.5+2 · 2.7+1 · 3.25) is 22.7 mm. Considering the inner angle of the bogie near the cargo end under the limit condition and the total minimum allowable distance D of the end part of the transformerBT＝DBT_E-DB_R-DB_RAMP-DB_GAP0mm, i.e. DBT_C-(LT+LB)-DB_R-DB_RAMP-DB_GAP0mm, bogie length 2LB3780mm, the allowable cargo length is 2LT13225.8mm (outer guide), 13181mm (middle guide) 13165mm (inner guide).
Due to the total minimum allowable distance D when the vehicle is in a straight lineBTIs a superposition of the minimum clearances under the action of different guiding modes, and the minimum allowable safety threshold value under the condition that the vehicle is in a straight line is different for different transportation standards. Therefore, the total minimum allowable distance D of the vehicles in the straight line state under different transportation standards is obtained based on the different transportation standardsBT：
DK36AThe distance between the two bogies at the inner end on the straight line of the type hole-dropping car is 13370mm, and the minimum allowable distance between the two ends of the goods and the bogies which do not interfere with each other is 72.1mm (outer guide), 94.5mm (middle guide) and 102.5mm (inner guide). The safety margin of 50mm is considered at the two ends, so that the goods and the bogie are not dried when the vehicle is in a straight line stateThe minimum allowable distance between the two ends is 122.1 (outer guide), 144.5mm (middle guide) and 152.5mm (inner guide).
According to the method and the system for calculating the safe loading size of the goods passing through the curve of the railway drop-hole car, the center plate parameter, the bogie parameter and the curvature parameter of the curve to be passed of the drop-hole car are obtained; based on the geometric relationship among all center plates, bogies and circle centers of curves to be passed of the hole car, calculating the longitudinal distance between the center plate of the bogie at the inner end of the near goods and the center of the goods and the longitudinal size of the half-width convex part of the bogie caused by the relative deflection angle of the near goods bogie and the horizontal goods according to the center plate parameters, the bogie parameters and the curvature parameters, and determining the minimum allowable distance between the inner angle of the bogie at the near goods end of the hole car and the end part of the goods; and determining the safe loading size of the goods of the hole car based on the minimum allowable distance, the longitudinal size and the longitudinal distance, and controlling the size of the goods of the hole car to be in the safe loading size when the hole car passes through the curve to be passed, so that the safety of the hole car when the hole car passes through the curve is ensured.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A method for calculating the safe loading size of cargoes passing curves of railway drop hole cars is characterized by comprising the following steps:
acquiring a center plate parameter, a bogie parameter and a curvature parameter of a curve to be passed of the hole-dropping vehicle;
based on the geometric relationship among all center plates, bogies and circle centers of curves to be passed of the hole-dropping vehicle, calculating the longitudinal distance between the center plate of the bogie at the inner end of the near-cargo and the center of the cargo and the longitudinal size of the half-width protruding part of the bogie caused by the relative deflection angle of the near-cargo bogie and the horizontal cargo according to the center plate parameters, the bogie parameters and the curvature parameters, and determining the minimum allowable distance between the inner angle of the bogie at the near-cargo end of the hole-dropping vehicle and the end part of the cargo;
and determining the safe loading size of the goods of the drop-off hole car based on the minimum allowable distance, the longitudinal size and the longitudinal distance, and controlling the size of the goods of the drop-off hole car to be within the safe loading size when the drop-off hole car passes through the curve to be passed.
2. The method of claim 1, wherein the core parameter comprises a small chassis core half-length LSFMiddle bottom frame center plate interval half-length LMFThe offset delta of the theoretical center of the guiding rotary center and the corresponding underframe and the distance x between the guiding rotary centers; the bogie parameters include bogie half-length LBAnd a half width W of the bogieBThe curvature parameter of the curve to be crossed is the radius R of the curve to be crossedSF。
3. The method for calculating the safe loading size of the cargoes passing curve of the railway drop-hole car according to claim 2, wherein the longitudinal distance between the bogie center plate and the center of the cargoes at the near cargo inner end and the longitudinal size of the half-width convex part of the bogie caused by the relative deflection angle of the bogie of the near cargo and the horizontal cargoes are calculated according to the center plate parameter, the bogie parameter and the curvature parameter, and the method comprises the following steps:
according to the half-length L of the distance between the small chassis and the central discSFMiddle bottom frame center plate interval half-length LMFAnd radius R of the curve to be passedSFCalculating a first included angle theta formed by the center of the small underframe center plate, the center of the curve to be crossed and the middle point of the distance between the small underframe center platesSFA second included angle theta formed by the center of the middle sole frame center plate, the circle center of the curve to be crossed and the middle point of the distance between the middle sole frame center platesMFAnd a first distance R between the large underframe center plate and the circle center of the curve to be crossedLF(ii) a Wherein the second included angle thetaMFA first included angle thetaSFThe circle center of the curve to be passed is taken as a vertex;
determining that the dropped hole car has passedAnd the guide mode of the curve to be crossed is determined according to the offset delta between the guide rotation center corresponding to the guide mode and the theoretical center of the middle chassis, the corresponding guide rotation center distance x and the first distance RLFCalculating half-length L of center plate interval of large underframe of the hole-dropping vehicleLF；
Based on half long L of big chassis heart dish intervalLFA first distance RLFA first included angle thetaSFA second angle thetaMFAnd radius R of the curve to be passedSFCalculating the longitudinal distance D between the bogie center plate near the inner end of the goods and the center of the goodsBT_C；
According to the first included angle thetaSFA second angle thetaMFAnd a half width W of the bogieBCalculating the relative deflection angle theta between the bogie and the horizontal goodsRResulting in a longitudinal dimension D of the half-width nose of the bogieB_R。
4. The method of claim 3, wherein the L is half the distance between the center plates of the small underframeSFMiddle bottom frame center plate interval half-length LMFAnd radius R of the curve to be passedSFCalculating a first included angle theta formed by the center of the small underframe center plate, the center of the curve to be crossed and the middle point of the distance between the small underframe center platesSFA second included angle theta formed by the center of the middle sole frame center plate, the circle center of the curve to be crossed and the middle point of the distance between the middle sole frame center platesMFAnd a first distance R between the large underframe center plate and the circle center of the curve to be crossedLFThe method comprises the following steps:
based on the small chassis center plate is on the curve to be passed, the distance between the small chassis center plates is half the length LSFAnd radius R of the curve to be passedSFCalculating a first included angle theta formed by the center of the small underframe center plate, the center of the curve to be crossed and the middle point of the distance between the small underframe center platesSF：
θSF＝sin-1(LSF/RSF)；
Based on the center point weight of the distance between the middle chassis center plate and the small chassis center plateThrough the first included angle thetaSFAnd a radius R of the curve to be passedSFCalculating a second distance R between the center disk of the central chassis and the center of the curve to be crossedMF：
RMF＝RSF·cosθSF；
According to the second distance RMFAnd half-length L of distance between center plates of middle sole frameMFCalculating a second included angle theta formed by the center of the middle bottom frame center plate, the circle center of the curve to be crossed and the middle point of the distance between the middle bottom frame center platesMF：
θMF＝sin-1(LMF/RMF)；
Based on the coincidence of the middle points of the distances between the large underframe center plate and the middle underframe center plate, passing through the second included angle thetaMFAnd the second distance RMFCalculating a first distance R between the center disk of the large underframe and the center of the curve to be crossedLF：
RLF＝RMF·cosθMF。
5. The method for calculating the safe loading size of the cargoes passing curve of the railway drop hole car according to claim 3, wherein the guiding manner comprises an outer guide, a middle guide and an inner guide; according to the offset delta between the corresponding guide rotation center and the theoretical center of the middle chassis, the corresponding guide rotation center distance x and the first distance RLFCalculating half-length L of center plate interval of large underframe of the hole-dropping vehicleLFThe formula is as follows:
Figure FDA0003229015170000021
the offset between the outer guide rotation center and the theoretical center of the middle chassis is deltaLF_EX(ii) a The distance between the outer guide rotary centers is 2LLF_EX(ii) a The offset between the center of rotation of the middle guide and the theoretical center of the middle chassis is set to be deltaLF_MD(ii) a The distance between the center of rotation of the center guide is 2LLF_MD(ii) a An inner guiding rotation center and a middle bottom frameTheoretical center offset of ΔLF_IN(ii) a The distance between the inner guide rotary centers is set to be 2LLF_IN(ii) a When the guiding mode is external guiding, x ═ L in the formulaLF_EX、Δ＝ΔLF_EX(ii) a When the guidance mode is center guidance, x ═ L in the formulaLF_MD、Δ＝ΔLF_MD(ii) a When the guiding mode is internal guiding, x is LLF_IN、Δ＝ΔLF_IN。
6. The method of claim 3, wherein the L is half-length of the center-disk distance of the large underframe, and the L is half-length of the center-disk distance of the large underframeLFA first distance RLFA first included angle thetaSFA second angle thetaMFAnd radius R of the curve to be passedSFCalculating the longitudinal distance D between the bogie center plate near the inner end of the goods and the center of the goodsBT_CThe method comprises the following steps:
according to the half-length L of the distance between the large underframe core platesLFA first distance RLFCalculating a third included angle theta formed by the center of the large chassis center plate, the circle center of the curve to be passed and the middle point of the distance between the large chassis center platesLFWherein the third angle thetaLFTaking the circle center of the curve to be passed as a vertex:
θLF＝sin-1(LLF/RLF)；
according to the first included angle thetaSFA second angle thetaMFAnd a third angle thetaLFCalculating a fourth included angle theta between a line connecting the circle center and the inner end small underframe center plate and a line connecting the circle center and the car center, wherein the calculation formula is as follows:
θ＝θLF-(θSF+θMF)；
according to the fourth included angle theta and the radius R of the curve to be passedSFCalculating the longitudinal distance D between the bogie center plate near the inner end of the goods and the center of the goodsBT_C：
DBT_C＝RSF·sinθ。
7. The railway drop hole car curve crossing cargo security device of claim 3The load size calculation method is characterized in that the load size calculation method is based on the first included angle thetaSFA second angle thetaMFAnd a half width W of the bogieBCalculating the longitudinal dimension D of the half-width projection of the bogie due to the relative yaw angle of the near cargo bogie to the horizontal cargoB_RThe method comprises the following steps:
according to the first included angle thetaSFAnd a second angle thetaMFCalculating the relative included angle theta between the connecting line of the small chassis center plates of the near goods and the large chassisR：
θR＝θLF-θMF；
According to the relative included angle theta between the connecting line of the small chassis center plates close to the goods and the large chassisRAnd a half width W of the bogieBCalculating the longitudinal dimension D of the half-width projection of the bogie due to the relative yaw angle of the near cargo bogie to the horizontal cargoB_R：
DB_R＝WB·sinθR。
8. The method of claim 1, wherein the determining the safe loading size of the car load is performed based on the minimum allowable distance, the longitudinal dimension and the longitudinal distance, and is implemented by the following formula:
DBT≤DBT_E-DB_R；
DBT_E＝DBT_C-(LT+LB)；
wherein D isBTIs the minimum allowable distance, DB_RLongitudinal dimension of the truck half-width projection due to the relative yaw angle of the near cargo truck to the horizontal cargo, DBT_EIs close to the distance between the end of the goods bogie and the midpoint of the end of the goods, LTIs half the length of the cargo, LBApproximately half as long as the cargo bogie.
9. The method of claim 1, wherein the determining the safe loading size of the car load is performed based on the minimum allowable distance, the longitudinal dimension and the longitudinal distance, and is implemented by the following formula:
DBT≤DBT_E-DB_R-DB_RAMP-DB_GAP；
DBT_E＝DBT_C-(LT+LB)；
wherein D isBTIs the minimum allowable distance, DB_RLongitudinal dimension of the truck half-width projection due to the relative yaw angle of the near cargo truck to the horizontal cargo, DBT_EIs close to the distance between the end of the goods bogie and the midpoint of the end of the goods, LTIs half the length of the cargo, LBApproximately half a length of the cargo bogie, DB_RAMPThe amount of inclination of the bogie to the load due to the difference in height and inclination angle of the ramp and the straight road, DB_GAPThe total clearance of the bogie center plates at one end of the goods.
10. A computer system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the method of any one of claims 1 to 9 are performed when the computer program is executed by the processor.
CN202110980739.3A 2021-08-25 2021-08-25 Method and system for calculating safe loading size of goods passing curve of railway drop-hole car Pending CN113609438A (en)

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