A rapid assessment method for the safety performance of passenger ship evacuation

Abstract

The present invention discloses a rapid evaluation method for the safety performance of passenger ship personnel evacuation, including the following steps: (1) Collecting the evacuation space distribution information, personnel distribution information and evacuation plan information of the passenger ship; (2) Determining the nodes representing the ship layout elements according to the collected information, and constructing an evacuation network based on the hydraulic model; (3) Combining the evacuation network structure, the personnel distribution information therein and the node geometric parameters, initializing the starting node and calculating the flow parameters of other nodes; (4) Calculating performance indicators such as evacuation time, congestion degree and countercurrent condition according to the flow parameters of each network node; (5) Evaluating whether the evacuation performance of the passenger ship meets the standards, and analyzing the possible problems in the layout design and evacuation plan; The present invention rapidly evaluates the personnel evacuation time, congestion degree and countercurrent condition of the passenger ship, and evaluates the rationality of the passenger ship space layout and evacuation plan in real time, thereby reducing the safety hazards of passenger ship personnel evacuation.

Description

Technical Field

[0001] The present invention relates to the technical field of ship performance design, and particularly to a method for quickly evaluating the evacuation safety performance of passengers on a passenger ship. Background Art

[0002] At present, to ensure the safety of passenger ships during the operation stage, evacuation performance needs to be considered during the ship design stage, and the layout of spaces such as cabins, restaurants, and theaters on the ship and the design of channels such as stairs, corridors, and doorways need to be evaluated and checked. After several maritime disasters causing heavy casualties, the International Maritime Organization (IMO) has issued and gradually improved the evacuation analysis guidelines for passenger ships, clarifying and strengthening the consideration of evacuation safety during the ship design process. The latest revised version of the guidelines is MSC.1 / Circ.1533 issued in 2016, which is mandatory for newly built passenger ships in 2020.

[0003] The IMO guidelines set evacuation performance standards for passenger ships: for ro-ro passenger ships or passenger ships with no more than three main vertical zones, the total evacuation time does not exceed 60 minutes; for passenger ships with more than three main vertical zones, it does not exceed 80 minutes. The guidelines set benchmark scenarios to be considered when calculating and evaluating the evacuation time, including the main night scenario, the main day scenario, the secondary night scenario, and the secondary day scenario, etc. The distribution of passengers and crew, response times, and the ship spaces to be considered vary under different scenarios. At the same time, the guidelines provide two optional methods for analyzing evacuation performance, a simplified method based on a hydraulic network and an advanced method based on computer simulation. Compared with the advanced method that considers the detailed ship layout and personnel characteristics, the simplified method simplifies the ship channels into a hydraulic network and abstracts the evacuating people into a homogeneous fluid. The principle is clear and easy to apply, and the evacuation time can be obtained only by manual calculation. The simplified method draws on the evacuation performance evaluation method of onshore buildings and has strong practicality. This method is widely used in the performance design of passenger ships, especially in the initial stage of ship design, for evacuation performance evaluation.

[0004] In terms of the existing technology, there are still the following problems in using the IMO simplified evacuation analysis method to evaluate the evacuation performance of passenger ships: this method only considers time as the evacuation safety performance index, which is relatively single, and does not quantitatively evaluate indicators such as congestion and countercurrent, while congestion and countercurrent may seriously affect the evacuation process and even lead to stampede accidents; this method relies on manual calculation, the process is cumbersome, a large amount of data input and output need to be processed, the calculation period is long and errors are prone to occur, resulting in inaccurate final evacuation evaluation; at the same time, when the ship layout or evacuation plan changes, the evacuation network needs to be redrawn or adjusted significantly, and the change of evacuation performance cannot be captured in real time, reducing the efficiency of ship design and emergency management. Summary of the Invention

[0005] Objective of the Invention: The objective of the present invention is to provide a method for rapidly evaluating the safety performance of passenger ship evacuation, which can combine the layout of passenger ship cabins and passageways and the personnel distribution, and based on the hydraulic network model in the IMO evacuation analysis guidelines, rapidly evaluate the safety evacuation performance such as the evacuation time, congestion degree and countercurrent condition of the passenger ship, and evaluate the rationality of the passenger ship space layout and evacuation plan in real time, so as to reduce the potential safety hazards of passenger ship evacuation.

[0006] Technical Solution: A method for rapidly evaluating the safety performance of passenger ship evacuation according to the present invention includes the following steps:

[0007] (1) Collect the passenger ship evacuation space distribution information, personnel distribution information and evacuation plan information through the general arrangement plan of the cruise ship and the evacuation plan.

[0008] (2) Determine the nodes representing the ship layout elements according to the collected information, and construct an evacuation network based on the hydraulic model.

[0009] (3) Combine the evacuation network structure and the personnel distribution information and node geometric parameters therein, initialize the starting node and calculate the flow parameters of other nodes.

[0010] (4) Calculate the performance indicators such as evacuation time, congestion degree and countercurrent condition according to the flow parameters of each network node.

[0011] (5) Combine the calculation results of each performance indicator and the criteria set in the IMO evacuation guidelines to evaluate whether the passenger ship evacuation performance meets the standards, and analyze the possible problems in the layout design and evacuation plan.

[0012] Further, in step (1), the information obtained from the general arrangement plan of the passenger ship includes: the number of each deck, the position of the main vertical zone separation, the position and type of passenger cabins and crew cabins, the position of fire doors, the area of cabin areas and each public space, the position of escape passages and stairs; the information obtained from the evacuation plan includes: the position and capacity of the muster station, the decks of each area, the designated muster stations and muster paths of personnel, and the area decks are generated by the vertical and horizontal separations of the main vertical zones and the decks.

[0013] Further, in step (2), the nodes of the ship layout elements include: the corridors in the cabin areas, the stairs connecting two decks, the muster stations, each public area, and the passages and doors connecting the planar spaces; according to the above nodes, an adaptive evacuation network is constructed based on the IMO hydraulic model, including: Stair Up and Stair Down nodes, Corridor nodes that can be divided according to the evacuation plan, potential countercurrent Path and Stair nodes, and directed connecting lines between each node.

[0014] Further, step (3) includes the following steps:

[0015] (31) Divide the Corridor nodes in the cabin area according to the designated assembly station conditions of each area deck, and determine the geometric parameters such as the length, width and area of each node, as well as the initial number of people in the initial nodes;

[0016] (32) Calculate the initial personnel density D based on the initial number of people and area of the initial nodes, and then calculate the initial specific flow F through the following formula S and the initial speed S:

[0017]

[0018]

[0019] (33) Calculate the parameters of each node in the network in turn according to the initial specific flow and the direction of the evacuation network flow, including the calculated flow F C 、specific flow F S 、personnel speed S, number of people N; specifically as follows:

[0020] First, calculate the flow of the initial node, which can be obtained from the following formula:

[0021] F C =F S W C (3)

[0022] where W C (m) represents the net width of the layout element; among them, the layout elements are doors, corridors, and stairs;

[0023] Then, the flow of people moves from the initial node to other nodes, continues to flow along the network, and finally converges to the node representing the assembly station. The flow calculation during the flow process follows the following flow conservation theorem:

[0024] ∑F C (in) i =∑F C (out) j (4)

[0025] where F C (in) i represents the arriving flow, and F C (out) j represents the departing flow.

[0026] Secondly, determine the specific flow according to the calculated flow and formula (3). When the specific flow exceeds the specified maximum value, set it to the maximum value. The maximum values of the specific flow for different node types are as follows:

[0027]

[0028] Finally, according to the specific flow rate and node type, the personnel speed can be calculated:

[0029]

[0030]

[0031]

[0032] The number of personnel at each node is determined by the evacuation plan and the net width of the layout elements represented by the node. When multiple outgoing flows lead to the same node, the number of personnel in each outgoing flow is proportional to the size of the net width.

[0033] Furthermore, step (4) includes the following steps:

[0034] (41) Calculate the passing time t of the crowd flow at each node and the moving time t flow based on the obtained node personnel speed and personnel quantity parameters: travel :

[0035] t flow = N / F C (9)

[0036] t travel = L / S (10)

[0037] where L represents the length of the node;

[0038] (42) For each initial node, calculate the total time t for personnel to reach the assembly station through the following formula total :

[0039] t total (i) = t travel (i) + t travel (i max ) + max (t flow (i), t flow (i max )) (11)

[0040] where node i max is the node with the maximum t among the nodes that node i leads to. This formula is a recursive calculation formula, and when the type of node i total is Assembly, the calculated value is gradually returned. max

[0041] (43) Determine the evacuation time T, congestion degree C, and countercurrent condition F for evaluating the evacuation performance:

[0042] T = (γ + δ) max (t total ) (12)

[0043] Among them, γ is the correction coefficient and δ is the countercurrent correction coefficient; max(t total ) is the maximum value of the total time of each node;

[0044] C = ∑c i (13)

[0045]

[0046] Among them, c i is the congestion degree measurement value of node i, D i is the initial density of the node, and ΔF C is the difference between the calculated inflow and outflow of this node. When the specific inflow into this node exceeds the maximum specific flow, there will be a deviation in the calculated inflow and outflow values;

[0047] F = ∑f i (15)

[0048] f i = min(N a , N b ) / W i (16)

[0049] Among them, f i is the countercurrent condition measurement value of the countercurrent node pair to i, N a and N b are the number of people in the two nodes of the node pair respectively, and W i is the net width of the node pair.

[0050] Furthermore, step (5) is specifically as follows: Combining the performance measurement criteria set in the IMO evacuation guidelines, evaluate whether each evacuation performance index meets the standards, including evacuation time T (s), congestion degree C, and countercurrent condition F:

[0051] 1.25(R + T) ≤ T limit (17)

[0052]

[0053]

[0054] Among them, R is the reaction time of people, determined according to the night evacuation or day evacuation scenario; N MVZ is the number of main vertical zones of the passenger ship; when the evacuation time does not meet the standard, sort the t total of each node, analyze the cumulative passing time and cumulative moving time of the nodes with larger t total , and identify the problems existing in the layout design and evacuation plan;

[0055] C ≤ 0.1N item (20)

[0056] where N item is the total number of nodes in the evacuation network. When the congestion index is too large, sort the D i and ΔF C

[0057] of each node respectively, analyze the location distribution of the nodes with larger D i and ΔF C to identify problems existing in the layout design and evacuation plan.

[0058] F ≤ max(t total ) (21)

[0059] where max(t total ) is the maximum value of the total time of each node. When the countercurrent condition does not meet the standard, sort the f i of each countercurrent node pair, analyze the location distribution of the node pairs with larger f i to identify problems existing in the layout design and evacuation plan.

[0060] A rapid evaluation system for the evacuation safety performance of passenger ships according to the present invention includes:

[0061] An information collection module: used to collect the evacuation space distribution information, personnel distribution information, and evacuation plan information of the passenger ship through the general arrangement plan of the cruise ship and the evacuation plan;

[0062] An evacuation network module: used to determine the nodes representing the ship layout elements according to the collected information and construct an evacuation network based on the hydraulic model;

[0063] A flow parameter module: used to initialize the starting node and calculate the flow parameters of other nodes in combination with the evacuation network structure, the personnel distribution information therein, and the node geometric parameters;

[0064] An index module: used to calculate the performance indexes of evacuation time, congestion degree, and countercurrent condition respectively according to the flow parameters of each network node;

[0065] An evaluation module: used to evaluate whether the evacuation performance of the passenger ship meets the standard in combination with the calculation results of each performance index and the criteria set by the IMO evacuation guidelines, and analyze the possible problems existing in the layout design and evacuation plan.

[0066] An electronic device according to the present invention includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the computer program is loaded into the processor, it implements any one of the rapid evaluation methods for the evacuation safety performance of passenger ship personnel.

[0067] A storage medium according to the present invention stores a computer program, and when the computer program is executed by a processor, it implements any one of the rapid evaluation methods for the safety performance of passenger ship personnel evacuation.

[0068] Beneficial effects: Compared with the prior art, the present invention has the following remarkable advantages: constructing an adaptive evacuation network based on the IMO hydrodynamic model, abstracting the public spaces, corridors, stairs, and assembly stations of the ship as the nodes of the network, initializing each starting node and calculating the number of people passing through, walking speed, specific flow rate, calculated flow rate and other pedestrian flow parameters of other nodes, and then constructing a recursive method to calculate the evacuation time required for each starting node, and calculating comprehensive evacuation performance indicators such as congestion degree and countercurrent condition, quickly evaluating the evacuation safety of passenger ships, providing real-time feedback for the design of passenger ship space layout and the formulation of evacuation planning schemes, improving the design and planning efficiency, and having strong practical application effects. Brief Description of the Drawings

[0069] Figure 1 is a flowchart of the present invention;

[0070] Figure 2 is an evacuation planning scheme required for the personnel evacuation scenario of a certain passenger ship of the present invention;

[0071] Figure 3 is a partial evacuation network diagram constructed for the personnel evacuation of a certain passenger ship of the present invention. Detailed Embodiments

[0072] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings.

[0073] As Figure 1 shown, an embodiment of the present invention provides a rapid evaluation method for the safety performance of passenger ship personnel evacuation, including:

[0074] S1: Obtain the passenger ship evacuation space distribution information, personnel distribution information, and evacuation planning scheme information through the cruise general arrangement plan and the evacuation planning scheme; specifically as follows: The information obtained from the passenger ship general arrangement plan includes the deck numbers of each floor, the positions of the main vertical zone separations, the positions and types of passenger cabins and crew cabins, the positions of fire doors, the cabin areas and the areas of each public space, and the positions of escape routes and stairs; The information obtained from the evacuation planning scheme includes the position and capacity of the assembly stations, the designated assembly stations and assembly paths of the personnel on each area deck (Zone-deck), and the evacuation planning scheme is as Figure 2 shown, where the area deck is generated by the vertical and horizontal separations of the main vertical zone and the deck.

[0075] S2: Determine the nodes representing the ship layout elements based on the collected information and construct an evacuation network based on the hydrodynamic model. Specifically as follows: The ship layout elements of the nodes include the corridors in the cabin areas, the stairs connecting two decks, the assembly stations, each public area, and the passages and doors connecting the planar spaces. Based on the above nodes, construct an adaptive evacuation network based on the IMO hydrodynamic model. The network should include: Stair Up and Stair Down nodes, Corridor nodes that can be divided according to the evacuation plan, potential countercurrent Path and Stair nodes, and directed connection lines between each node. The partial evacuation network of the VISTA cruise ship drawn in AutoCAD is as Figure 3 shown.

[0076] S3: Combine the evacuation network structure, the personnel distribution information therein, and the node geometric parameters, initialize the starting node and calculate the flow parameters of other nodes; including the following steps:

[0077] S3.1: Compile a program to read the evacuation network of the VISTA cruise ship, divide the Corridor nodes in the cabin areas according to the designated assembly station situation of the personnel on each deck of the VISTA cruise ship, determine the geometric parameters such as the length, width, and area of each node, and the initial number of people in the initial node;

[0078] S3.2: Calculate the initial personnel density D based on the initial number of people and the area of the initial node, and then calculate the initial specific flow rate F S (p / m / s) and the initial velocity S (m / s) through the following formula:

[0079]

[0080]

[0081] S3.3: Calculate the parameters of each node in the network in turn according to the initial specific flow rate and the evacuation network flow direction, including calculating the flow rate F C (p / s), the specific flow rate F S (p / m / s), the personnel velocity S (m / s), and the number of personnel N (p). The calculated flow rate of the initial node can be obtained from the following formula:

[0082] F C = F S W C (3)

[0083] where, W C (m) represents the net width of the layout elements (doors, corridors, stairs).

[0084] The pedestrian flow moves from the initial node to other nodes, continues to flow along the network, and finally converges to the node representing the assembly station. During the flow process, the following flow conservation theorem is followed when calculating the flow rate:

[0085] ∑F C (in) i =∑F C (out) j (4)

[0086] where F C (in) i represents the arriving flow, and F C (out) j represents the departing flow.

[0087] Determine the specific flow rate according to the calculated flow rate and formula (3). When the specific flow rate exceeds the defined maximum value, set it to the maximum value. The maximum values of the specific flow rates for different node types are as follows:

[0088]

[0089] According to the specific flow rate and node type, the pedestrian speed can be calculated:

[0090]

[0091]

[0092]

[0093] The number of pedestrians at each node is determined by the evacuation plan and the net width of the layout elements (stairs, corridors, doors) represented by the node. When multiple departing flows lead to the same node, the number of pedestrians in each departing flow is proportional to the size of the net width.

[0094] S4: Calculate performance indicators such as evacuation time, congestion level, and counterflow condition respectively according to the pedestrian flow parameters of each network node; including the following steps:

[0095] S4.1: Calculate the passing time t flow (s) and moving time t travel (s) of the pedestrian flow at each node according to the node pedestrian speed and pedestrian number parameters calculated in step S3:

[0096] t flow =N / F C (9)

[0097] t travel =L / S (10)

[0098] where L represents the length (m) of the node (Corridor, Stair, Path).

[0099] S4.2: For each initial node, calculate the total time t for personnel to reach the assembly station through the following formula total (s):

[0100] t total (i) = t travel (i) + t travel (i max ) + max(t flow (i), t flow (i max )) (11)

[0101] where node i max is the node with the maximum t among the nodes that node i leads to. This formula is a recursive calculation formula, and when the type of node i total is Assembly, the calculated value will be gradually returned. max

[0102] S4.3: Determine the evacuation time T(s), congestion degree C, and countercurrent condition F for evaluating the evacuation performance

[0103] T = (γ + δ)max(t total ) (12)

[0104] where γ is the correction coefficient, taking the value of 2 in the basic evacuation scenario and 1.3 in the secondary evacuation scenario; δ is the countercurrent correction coefficient, taking the value of 0.3; max(t total ) is the maximum value of the total time of each node.

[0105] C = ∑c i (13)

[0106]

[0107] where c i is the congestion degree measurement value of node i, D i is the initial density of the node, and ΔF C is the difference between the calculated inflow and outflow of this node. When the specific inflow into this node exceeds the maximum specific flow, the calculated inflow and outflow values will deviate.

[0108] F = ∑f i (15)

[0109] f i = min(N a , N b ) / W i (16)

[0110] where f i ​is the measurement value of the countercurrent situation for the countercurrent node pair i, N a and N b are the number of personnel at the two nodes in the node pair respectively, W i is the net width of the node pair.

[0111] S5: Combine the calculation results of each performance index and the criteria set in the IMO evacuation guidelines to evaluate whether the evacuation performance of the passenger ship meets the standards, and analyze the possible problems in the layout design and evacuation plan. Specifically as follows: Combine the performance measurement standards set in the IMO evacuation guidelines to evaluate whether each evacuation performance index of the VISTA cruise ship meets the standards, including the evacuation time T (s), the congestion degree C, and the countercurrent situation F:

[0112] 1.25(R + T) ≤ T limit (17)

[0113]

[0114]

[0115] Among them, R is the reaction time of personnel, determined according to the night evacuation or day evacuation scenario; N MVZ is the number of the main vertical zones (Main Vertical Zone) of the passenger ship.

[0116] C ≤ 0.1N item (20)

[0117] Among them, N item is the total number of nodes in the evacuation network.

[0118] F ≤ max (t total ) (21)

[0119] Among them, max(t total ) is the maximum value of the total time of each node.

[0120] The present invention compiles a program to execute this calculation method based on C++. From reading the evacuation hydraulic network diagram of the VISTA cruise ship to giving the evacuation evaluation result, it takes about 1.5 seconds. Compared with manual calculation, the efficiency is greatly improved. The evacuation evaluation result of the VISTA cruise ship is shown in Table 1. It can be seen that under the current cruise ship layout and evacuation plan, the evacuation time and congestion degree performance meet the standards, but the countercurrent situation does not meet the standards. Sort the countercurrent measurement values of each countercurrent node, analyze the position distribution of the node pairs with larger values, and identify that these nodes are mainly concentrated on the decks of two areas, (MVZ 4, Deck 3) and (MVZ 2, Deck 4). There are relatively serious countercurrent situations in these areas, and evacuation jams or even stampedes may occur, so the general arrangement or evacuation plan needs to be adjusted to improve the evacuation performance.

[0121] Table 1 VISTA Cruise Ship Evacuation Assessment Results

[0122]

[0123] An embodiment of the present invention further provides a rapid assessment system for the evacuation safety performance of passenger ships, including:

[0124] An information collection module: used to collect the passenger ship evacuation space distribution information, personnel distribution information, and evacuation plan information through the general arrangement plan of the cruise ship and the evacuation plan.

[0125] An evacuation network module: used to determine the nodes representing the ship layout elements based on the collected information and construct an evacuation network based on the hydraulic model.

[0126] A pedestrian flow parameter module: used to initialize the starting node and calculate the pedestrian flow parameters of other nodes in combination with the evacuation network structure, the personnel distribution information therein, and the node geometric parameters.

[0127] An index module: used to calculate the performance indexes of evacuation time, congestion degree, and countercurrent condition respectively according to the pedestrian flow parameters of each network node.

[0128] An evaluation module: used to evaluate whether the evacuation performance of the passenger ship meets the standards by combining the calculation results of each performance index and the criteria set by the IMO evacuation guidelines, and analyze the possible problems in the layout design and evacuation plan.

[0129] An embodiment of the present invention further provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the computer program is loaded into the processor, it implements any one of the rapid assessment methods for the evacuation safety performance of passenger ships.

[0130] An embodiment of the present invention further provides a storage medium storing a computer program, and when the computer program is executed by a processor, it implements any one of the rapid assessment methods for the evacuation safety performance of passenger ships.

Claims

1. A rapid assessment method for the safety performance of passenger ship personnel evacuation, characterized in that It includes the following steps: (1) Collect the passenger ship evacuation space distribution information, personnel distribution information, and evacuation plan information through the general arrangement plan of the cruise ship and the evacuation plan; (2) Determine the nodes representing the ship layout elements based on the collected information, and construct an evacuation network based on the hydraulic model; The nodes of the ship layout elements include: the corridors in the cabin area, the stairs connecting two decks, the muster stations, each public area, and the passages and doors connecting the planar spaces; based on the above nodes, construct an adaptive evacuation network based on the IMO hydraulic model, including: Stair Up and Stair Down nodes, Corridor nodes divided according to the evacuation plan, potential countercurrent Path and Stair nodes, and directed connection lines between each node; (3) Combine the evacuation network structure, the personnel distribution information therein, and the node geometric parameters, initialize the starting node and calculate the pedestrian flow parameters of other nodes; it includes the following steps: (31) Divide the Corridor nodes in the cabin area according to the designated muster stations on each deck area, determine the geometric parameters of the length, width, and area of each node, and the initial number of people in the initial node; (32) Calculate the initial population density D based on the initial number of people and area of the initial node, and then calculate the initial specific flow rate F through the following formula S and the initial velocity S: (33) Calculate the parameters of each node in the network in sequence according to the initial specific flow rate and the direction of the flow of people in the evacuation network, including calculating the flow rate F C , the specific flow rate F S , the speed S of people, and the number N of people; specifically as follows: First, calculate the flow rate of the initial node, which is obtained by the following formula: F C = F S W C (3) Among them, W C (m) represents the net width of the layout element; among them, the layout elements are doors, corridors, and stairs; Then, the pedestrian flow moves from the initial node to other nodes, continues to flow along the network, and finally converges to the node representing the muster station. During the flow process, the following flow conservation theorem is followed when calculating the flow rate: ∑F C (in) i =∑F C (out) j (4) Among them, F C (in) i represents the arriving flow, F C (out) j represents the departing flow; Secondly, determine the specific flow rate according to the calculated flow rate and formula (3). When the specific flow rate exceeds the limited maximum value, set it to the maximum value. The maximum values of the specific flow rates for different node types are as follows: Finally, calculate the pedestrian speed according to the specific flow rate and the node type: The number of people in each node is determined by the evacuation plan and the net width of the layout elements represented by the node. When multiple outgoing flows lead to the same node, the number of people in each outgoing flow is proportional to the size of the net width; (4) Calculate the performance indicators of evacuation time, congestion degree, and countercurrent condition respectively according to the pedestrian flow parameters of each network node; it includes the following steps: (41) Calculate the passing time \(t\) of the crowd flow at each node based on the obtained node personnel speed and personnel quantity parameters flow and the moving time \(t\) travel : t flow = N / F C (9) t travel = L / S (10) Among them, L represents the length of the node; (42) For each initial node, calculate the total time \(t\) for personnel to reach the assembly station using the following formula total : t total (i) = t travel (i) + t travel (i max ) + max(t flow (i), t flow (i max )) (11) Among them, node i max is the node with the largest t among the nodes that node i leads to. This formula is a recursive calculation formula, and when the type of node i total is Assembly, the calculated value is gradually returned; max ​ (43) Determine the evacuation time T, congestion degree C, and countercurrent condition F for evaluating the evacuation performance: T = (γ + δ) max(t total ) (12) where γ is the correction coefficient and δ is the countercurrent correction coefficient; max(t total ) is the maximum value of the total time of each node; C = ∑c i (13) Among them, c i is the congestion degree measurement value of node i, D i is the initial density of the node, ΔF C is the difference between the calculated inflow and outflow of the node. When the specific inflow into the node exceeds the maximum specific flow, there will be a deviation in the calculated inflow and outflow values; F = ∑f i (15) f i = min(N a , N b ) / W i (16) Among them, f i is the measure value of the countercurrent condition of the countercurrent node pair i, N a and N b are the number of personnel of the two nodes in the node pair respectively, and W i is the net width of the node pair; (5) Combine the calculation results of each performance indicator and the criteria set by the IMO evacuation guidelines to evaluate whether the passenger ship evacuation performance meets the standards, and analyze the problems existing in the layout design and evacuation plan.

2. The rapid evaluation method for the evacuation safety performance of passengers on a passenger ship according to claim 1, wherein, In step (1), the information obtained from the general arrangement plan of the cruise ship includes: the numbers of each deck, the positions of the main vertical zone separations, the positions and types of passenger cabins and crew cabins, the positions of the fire doors, the areas of the cabin area and each public space, and the positions of the escape passages and stairs; the information obtained from the evacuation plan includes: the positions and capacities of the muster stations, each deck area, the designated muster stations and muster paths of the personnel, and the deck area is generated by the vertical and horizontal separations of the main vertical zones and the decks.

3. A rapid evaluation method for the safety performance of passenger ship personnel evacuation according to claim 1, characterized in that Step (5) is specifically as follows: Combine the performance measurement criteria set in the IMO evacuation guidelines to evaluate whether each evacuation performance indicator meets the standards, including the evacuation time T (s), congestion degree C, and countercurrent condition F: 1.25(R + T) ≤ T limit (17) Among them, R is the response time of personnel, which is determined according to the night evacuation or day evacuation scenario; N MVZ is the number of main vertical zones of the passenger ship; when the evacuation time does not meet the standard, sort the t of each node total , analyze the cumulative passing time and cumulative moving time of the larger nodes, and identify the problems existing in the layout design and evacuation plan; total ​ C ≤ 0.1N item (20) Among them, N item is the total number of nodes in the evacuation network; when the congestion degree index is too large, for each node's D i and ΔF C are sorted respectively, and the position distribution of the nodes with larger D i and ΔF C is analyzed to identify problems existing in the layout design and evacuation plan; F ≤ max(t total ) (21) Among them, max(t total ) is the maximum value of the total time of each node; when the countercurrent condition does not meet the standard, sort the f i of each countercurrent node pair, analyze the position distribution of the node pairs with larger f i to identify problems existing in the layout design and evacuation plan.

4. A rapid assessment system for the safety performance of passenger ship personnel evacuation, characterized in that, It includes: Information collection module: used to collect passenger ship evacuation space distribution information, personnel distribution information, and evacuation plan information through the general arrangement plan of the cruise ship and the evacuation plan; Evacuation network module: used to determine the nodes representing the ship layout elements based on the collected information, and construct an evacuation network based on the hydraulic model; The nodes of the ship layout elements include: the corridors in the cabin area, the stairs connecting two decks, the assembly stations, each public area, and the passages and doors connecting the planar spaces; based on the above nodes, an adaptive evacuation network is constructed based on the IMO hydraulic model, including: Stair Up and Stair Down nodes, Corridor nodes divided according to the evacuation plan, potential countercurrent Path and Stair nodes, and directed connection lines between each node; Passenger flow parameter module: used to initialize the starting node and calculate the passenger flow parameters of other nodes in combination with the evacuation network structure, the personnel distribution information therein, and the node geometric parameters; including: According to the specified assembly station conditions on the decks of each area, divide the Corridor nodes in the cabin area, determine the geometric parameters of the length, width, and area of each node, and the initial number of people in the initial node; Calculate the initial population density D based on the initial number of people and the area of the initial node, and then calculate the initial specific flow rate F through the following formula S and the initial velocity S: According to the initial specific flow rate and the flow direction of the evacuation network, calculate the parameters of each node in the network in sequence, including the calculated flow rate F C , the specific flow rate F S , the personnel speed S, and the number of personnel N; specifically as follows: First, calculate the flow rate of the initial node, obtained from the following formula: F C = F S W C (3) Among them, W C (m) represents the net width of the layout element; among them, the layout elements are doors, corridors, and stairs; Then, the passenger flow moves from the initial node to other nodes, continues to flow along the network, and finally converges to the node representing the assembly station. During the flow process, the flow rate is calculated following the following flow conservation theorem: ∑F C (in) i =∑F C (out) j (4) Among them, F C (in) i represents the arriving flow, F C (out) j represents the departing flow; Secondly, determine the specific flow rate according to the calculated flow rate and formula (3). When the specific flow rate exceeds the specified maximum value, set it to the maximum value. The maximum values of the specific flow rates for different node types are as follows: Finally, calculate the personnel speed according to the specific flow rate and the node type: The number of people at each node is determined by the evacuation plan and the net width of the layout element represented by the node. When multiple outgoing flows lead to the same node, the number of people in each outgoing flow is proportional to the size of the net width; Index module: used to calculate the performance indicators of evacuation time, congestion degree, and countercurrent condition respectively according to the passenger flow parameters of each network node; including: Calculate the passing time \(t\) of the crowd flow at each node based on the obtained node personnel speed and personnel quantity parameters flow and the moving time \(t\) travel :[[]]END]] t flow = N / F C (9) t travel = L / S (10) Among them, L represents the length of the node; For each initial node, calculate the total time \(t\) for personnel to reach the assembly station using the following formula total :[[-END]] t total (i) = t travel (i) + t travel (i max ) + max(t flow (i), t flow (i max )) (11) where node i max is the node with the largest t among the nodes that node i leads to. This formula is a recursive calculation formula, and when the type of node i total is Assembly, the calculated value is gradually returned; max ​ Determine the evacuation time T, congestion degree C, and countercurrent condition F for evaluating the evacuation performance: T = (γ + δ) max(t total ) (12) where γ is the correction coefficient and δ is the countercurrent correction coefficient; max(t total ) is the maximum value of the total time of each node; C = ∑c i (13) Among them, c i is the congestion degree measurement value of node i, D i is the initial density of the node, ΔF C is the difference between the calculated traffic inflow and outflow of this node. When the specific traffic inflow into this node exceeds the maximum specific traffic, there will be a deviation in the calculated traffic inflow and outflow values; F = ∑f i (15) f i = min(N a , N b ) / W i (16) where, f i is the countercurrent condition measurement value of the countercurrent node pair i, N a and N b are the number of personnel of the two nodes in the node pair respectively, and W i is the net width of the node pair; Evaluation module: used to evaluate whether the passenger ship evacuation performance meets the standards by combining the calculation results of each performance indicator and the criteria set by the IMO evacuation guidelines, and analyze the problems existing in the layout design and evacuation plan.

5. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the computer program is loaded into the processor, it implements a rapid evaluation method for the evacuation safety performance of passenger ship personnel according to any one of claims 1-3.

6. A storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements a rapid evaluation method for the evacuation safety performance of passenger ship personnel according to any one of claims 1-3.

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