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Urban rail transit road network safety assessment and enhancement method based on passenger flow distribution

An urban rail transit and security technology, applied in the field of urban rail transit network safety assessment and enhancement based on passenger flow distribution, can solve the problem of high incidence of road network risks

Active Publication Date: 2019-06-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the passenger flow control is concentrated in the station, less consideration is given to the overall road network, and the overall risk of the entire road network is still high

Method used

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  • Urban rail transit road network safety assessment and enhancement method based on passenger flow distribution
  • Urban rail transit road network safety assessment and enhancement method based on passenger flow distribution
  • Urban rail transit road network safety assessment and enhancement method based on passenger flow distribution

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Experimental program
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Embodiment 1

[0037] Embodiment 1 of the present invention provides a method for evaluating and enhancing the safety of urban rail transit road network based on passenger flow distribution, such as figure 1 As shown, the method includes the following steps:

[0038] S1: Use the risk function of the station, the risk function of the interval and the weighted sum of the corresponding risk factors to obtain the overall risk of the road network;

[0039] In step S1, the risk function is used to quantitatively evaluate the overall risk of the road network, which can significantly improve the accuracy of risk assessment. This application uses e xas a risk function.

[0040] Among them, the overall risk of road network f(x 0 ) is calculated by formula (1):

[0041]

[0042] In the formula, i represents the station number, and a i represents the risk factor of station i, f(·) represents the risk function of the station, z i Indicates the throughput of passengers actually carried by station ...

Embodiment 2

[0062] Embodiment 2 is calculated with the rail transit network of Chongqing as an example, and the rail transit operation line information of Chongqing is as follows figure 2 As shown, the network topology map can be obtained by merging general stations and retaining the departure station, terminal station and transfer station, as shown in image 3 shown.

[0063] Depend on image 3 It can be seen that there are 32 nodes and 44 edges in total. For simplicity, all stations are divided into three categories: large stations, medium stations, and small stations. Shapingba, North-South Square of Chongqing North Railway Station, Ranjiaba, and Jiangbei Airport T2 are large stations, other transfer stations are medium-sized stations, and the start and end stations of each line are small-scale stations. The throughput capacity of each station is: 360 people / min for large stations, 240 people / min for medium stations, and 120 people / min for small stations. In addition, it is stipul...

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Abstract

The invention provides an urban rail transit road network safety assessment and enhancement method based on passenger flow distribution, and the method employs a risk function to quantitatively assessthe safety of a road network, and then carries out the passenger flow distribution at a road network level, so as to reduce the risk. According to the method, the matching degree of the actual operation states and the capacities of intervals and stations is used as the input of a risk function, and the static statistical indexes of the stations and the intervals in a road network are used as factors to carry out weighted summation on risks, so that the importance of different stations and intervals is embodied, and the overall risk of the road network is obtained through calculation. The minimum risk is used as an optimization target, constraint conditions are analyzed, it can be found that the optimization problem is a convex optimization problem, and therefore the optimal flow distribution scheme of the road network can be obtained. The method provided by the invention can enable the transport capacity to be more matched and the road network operation state to be more stable, thereby reducing the risk and improving the safety.

Description

technical field [0001] The invention belongs to the field of road network safety assessment and enhancement, in particular to a method for urban rail transit road network safety assessment and enhancement based on passenger flow distribution. Background technique [0002] Urban rail transit is an important travel mode for urban residents. As urban rail transit gradually forms a network and the scale of construction continues to expand, the demand for passenger travel is growing rapidly. Compared with the single line, the operating characteristics of the road network have changed. Most of the traffic volume is concentrated on a small number of lines. The contradiction between transport capacity and volume is prominent, and the correlation between lines is enhanced. The impact of passenger flow at a single station has a more obvious impact on the overall road network. Operational risks are increasing, and there is an urgent need for security assessment and enhancement of the e...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q10/06G06Q50/30
Inventor 董炜黄威孙新亚吉吟东
Owner TSINGHUA UNIV
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