CN109740266B - Underground structure damage assessment method based on complex effect field calculation - Google Patents
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Abstract
The invention relates to an underground structure damage assessment method based on complex effect field calculation, which comprises the following steps: the method comprises the following steps: determining underground structure target parameters, attack ammunition parameters and bullet intersection parameters; step two: carrying out damage effect calculation of a complex effect field according to a damage mechanism; step three: comparing the shock wave load and the earthquake dynamic load which are obtained by calculation in the step two and act on the internal components and the equipment with a standard damage criterion according to the parameters determined in the step one to obtain a physical damage evaluation result; step four: establishing a functional damage model, and carrying out functional damage evaluation on underground structural components and subsystems by combining physical damage evaluation results; step five: and establishing a damage evaluation model, and finally obtaining an evaluation conclusion of the damage effect of the underground structure system by combining the underground structure component and the subsystem function damage evaluation result. The invention solves the problem that the existing underground structure damage assessment method is not comprehensive and accurate.
Description
Technical Field
The invention relates to the technical field of damage assessment, in particular to an underground structure damage assessment method based on complex effect field calculation.
Background
The research and evaluation means of the weapon striking underground structure damage effect are mainly experiments and numerical simulation, the experimental result is visual and reliable, but the experimental period is long and the consumption is huge, on one hand, the numerical simulation depends on the selection of the constitutive model and the parameters thereof seriously because the calculation result on the one hand, and on the other hand, because the action process of the weapon and the target is very complicated, a complex effect field of the action of the weapon and the target exists, the action area is wide, and a huge calculation grid (mainly the target model) is needed for carrying out numerical calculation on the whole action process. On the premise of ensuring the calculation accuracy, the goal is often unrealistic under the current calculation conditions, and therefore, a damage assessment method for the underground structure needs to be developed. At present, through accumulation of recent decades, a large number of achievements have been researched by scholars at home and abroad aiming at single damage elements (such as penetration, explosion, ground impact, fragmentation, air shock wave, vibration and the like) of the weapon damage effect, and engineering calculation models of various damage element effects are provided, so that the fundamental problem in the field of weapon damage effect is solved to a great extent. However, the underground structure system is huge and complex in structure, after the weapon is hit, various damage elements (penetration, explosion, shock wave, fragment, earthquake motion, poison gas, combustion and the like) have complex effect fields with wide continuous action, coupling action and combined action, and a single damage element cannot well describe the situation of the engineering damage effect field.
Disclosure of Invention
The invention aims to provide an underground structure damage assessment method based on complex effect field calculation, which solves the problem that the existing underground structure damage assessment method is not comprehensive and accurate and realizes comprehensive assessment of the complex damage effect and damage effect of the underground structure.
The invention adopts the following technical scheme:
a method for evaluating damage of underground structure based on complex effect field calculation comprises the following steps:
the method comprises the following steps: determining underground structure target parameters, attack ammunition parameters and bullet intersection parameters;
step two: according to the damage mechanism, carrying out the damage effect calculation of a complex effect field, wherein the calculation steps are as follows:
1) calculating through a penetration effect according to the parameters determined in the first step to obtain a movement track of a weapon after invading a target, and calculating and determining a specific position invading an underground structure when the incoming ammunition is ignited according to the acting time of the fuze;
2) calculating a target structure collapse result according to the parameters determined in the step one and the specific position of the underground structure invaded by the incoming ammunition when being ignited, and determining the damage grade and the characteristics of the target structure according to the result; the calculation formula is as follows:
in the formula, the collapse coefficient K Z Values correspond to different macroscopic damage degrees, H is the structure thickness, C is the TNT charge, and e is the distance from the center of explosion to the explosion-facing surface.
3) According to the parameters determined in the step one, combining the calculation of the penetration effect and the collapse result of the target structure, further determining the damage mode of the underground structure;
4) according to the parameters determined in the step one, different weapon effect engineering calculation modules are called according to different damage modes to obtain shock wave loads and earthquake dynamic loads acting on internal components and equipment;
step three: according to the parameters determined in the first step, comparing the shock wave load and the earthquake dynamic load which are obtained by calculation in the second step and act on the internal components and the equipment with standard damage criteria, determining the damage grades of the internal components and the equipment to obtain the physical damage of the underground structural components and the equipment, and then carrying out physical damage analysis on the whole engineering to obtain a physical damage evaluation result;
step four: establishing a functional damage model, and carrying out functional damage evaluation on underground structural components and subsystems by combining physical damage evaluation results;
step five: and establishing a damage evaluation model based on an analytic hierarchy process, and finally obtaining an evaluation conclusion of the damage effect of the underground structure system by combining the underground structure component and subsystem function damage evaluation results.
The target parameters of the underground structure in the first step comprise: the number of target entrances and exits, the form of the target entrances and exits, target head structural parameters, target internal space distribution, target plane arrangement, target plane size, target material composition, basic physical and mechanical properties of the target, the number of facility equipment in the target, position distribution of the facility equipment in the target and subsystem parameters; the first step of the incoming ammunition parameters comprises the following steps: the number, type, total weight, loading quantity, caliber and head slenderness ratio of the incoming ammunition; the bullet mesh intersection parameters in the first step comprise a bullet impact angle, an attack angle, an initial speed, a target landing speed, a drop point coordinate and fuze delay.
The second step of the damage mode includes A, B, C, mode A means that the target head structure is not penetrated and not blasted, mode B means that the target head structure is not penetrated and blasted, and mode C means that the target head structure is penetrated to form an explosion in the structure.
The invention has the beneficial effects that: the invention is used as the calculation basis for the weapon to strike the damage effect of the underground structure according to the newly proposed concept of the 'complex effect field', solves the problem that the existing underground structure damage assessment method is not comprehensive and accurate, and realizes the comprehensive evaluation of the damage effect of the underground structure complex damage effect.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
A damage assessment method of an underground structure based on complex effect field calculation comprises the following steps:
the method comprises the following steps: determining underground structure target parameters, attack ammunition parameters and ammunition intersection parameters;
the target parameters of the underground structure comprise the following parameters:
1. the target name is: XX function
2. The target code is as follows: XX function
3. Target type: underground structure
4. Target resistance rating: precise hit of 500 pound resistant ground-boring missile
5. The target system comprises the following components: head structure, guard gate, tunnel, personnel and internal subsystems
6. The number of the entrances and exits: 2 are provided with
1 st access form: straight-through type
2 nd access port form: straight-through type
7. Parameters of the inlet and outlet head structure:
the 1 st access header configuration is shown in table one:
table one:
the 2 nd access header configuration is shown in table two:
table two:
8. parameters of tunnel
Total length of 1 st gate to 2 nd gate: 320.00 m 9, Aperture guard System/guard door parameters
The 1 st entrance and exit protection door parameter is shown in table three:
table three:
the 2 nd entrance and exit guard door parameters are shown in table four:
table four:
10. subsystem 1 parameters
Quantity: 1 set of
The distance between the 1 st set and the 1 st entrance is 150 meters
The distance between the 1 st set and the 2 nd gateway is 170 meters
11. Subsystem 2 parameters
Quantity: 1 set of
The distance between the 1 st set and the 1 st entrance is 200 m
The distance between the 1 st sleeve and the 2 nd gateway is 120 meters
12. Subsystem 3 parameters
Quantity: 1 set of
The distance between the 1 st set and the 1 st entrance is 200 m
The distance between the 1 st sleeve and the 2 nd gateway is 120 meters
13. Subsystem 4 parameters
Quantity: 1 set of
The distance between the 1 st set and the 1 st entrance is 200 m
The distance between the 1 st sleeve and the 2 nd gateway is 120 meters
The parameters of the incoming ammunition are as follows:
1. weapon type: conventional earth-boring weapon
2. Fire power and striking mode: single bullet strike
3. Weapon name: GBU-16
4. The number of weapons: 1
5. 1 st, hit 1 st entrance and exit, target site: a head structure;
6. head shape: egg type
7. And (3) diameter of bullet: 0.350 m
8. And (3) spring length: 3.7 m
9. Head length: 0.7 m
10. Quality: 453.0 kg
11. charge/(TNT): 272.7 kg
The bullet intersection parameters are as follows:
1. initial angle of attack: 0 degree
2. The impact angle: 90 degree
3. Initial speed: 300 m/s
4. Fuse delay: 0.30 second
Step two: according to the damage mechanism, carrying out the damage effect calculation of a complex effect field, wherein the calculation steps are as follows:
1) calculating through a penetration effect according to the parameters determined in the first step to obtain a movement track of a weapon after invading a target, and calculating and determining a specific position invading an underground structure when the incoming ammunition is ignited according to the acting time of the fuze;
the penetration effect calculation results are as follows:
penetration track length: 2.5001 Rice
Effective penetration depth: 2.5001 Rice
Depth of fried spots: 0.6601 Rice
Distance from frying point to bottom of structure: 2.3399 Rice
The penetration process is time-consuming: 17.9699 ms
Maximum axial acceleration: 4.7187E +003g
Maximum lateral acceleration: 2.821333E-004g
Residual speed: 0.0000 m/s
Thickness of non-collapse: 2.7188 Rice
Distance from blast point to structure bottom/collapse radius: 0.7871
2) Calculating a target structure collapse result according to the parameters determined in the step one and the specific position of the underground structure invaded by the incoming ammunition when ignition is performed, and determining the damage grade and the characteristics of the target structure according to the result; the calculation formula is as follows:
in the formula, the collapse coefficient K Z Values correspond to different macroscopic damage degrees, H is the structure thickness, C is the TNT charge amount, and e is the distance from the center of explosion to the explosion-facing surface.
Collapse coefficient K Z Pair with explosive partial damage levelThe corresponding relationship is shown in table five.
Table five:
the structural damage condition is as follows:
grade of head damage: (ii) destruction/death;
head damage characteristics: the bottom of the structure generates a shattering funnel pit, and the large blocks shatter and fly at high speed.
3) According to the parameters determined in the step one, combining the calculation of the penetration effect and the collapse result of the target structure, further determining the damage mode of the underground structure;
the damage modes include A, B, C mode, mode A means that the target head structure is not penetrated and not blasted through, mode B means that the target head structure is not penetrated and blasted through, and mode C means that the target head structure is penetrated to form an explosion in the structure.
The failure mode is shown in table six:
table six:
4) calling different weapon effect engineering calculation modules according to the parameters determined in the step one and different damage modes to obtain shock wave loads and earthquake dynamic loads acting on internal components and equipment;
step three: comparing the shock wave load and the earthquake dynamic load which are obtained in the step two and act on the internal component and the equipment with a standard damage criterion, determining the damage grade of the internal component and the equipment, obtaining the physical damage of the underground structural component and the equipment, and then carrying out physical damage analysis on the whole engineering to obtain a physical damage evaluation result;
1. protection against door damage
And 1, protecting the door from impact wave overpressure: 14.097714 MPa;
grade of damage: 5;
the characteristics of damage: complete destruction feature of protective door
2. The personnel injury situations are as follows:
critical distances corresponding to different levels of human damage under the action of the shock wave (damage criterion):
957.0 m as zero-degree damage (basically no damage);
605.0 m for mild injury (mild damage);
moderate damage (moderate killing) (auditory organ damage, moderate damage, fracture, etc.)): 340.0 m;
200.0 m for severe injury (severe internal injury, and death caused));
155.0 meters for destruction/death (very severe kill (most deaths));
1) and the personnel damage statistics under the action of the shock waves are shown in the seventh table.
TABLE VII:
| grade of damage | Number of persons |
| Zero degree damage | 0 |
| Mild damage | 0 |
| Moderate destruction | 18 |
| Severe injury | 18 |
| Destroy/death | 19 |
2) And the statistics of personnel damage under the action of earthquake motion are shown in the table eight.
Table eight:
| grade of damage | Number of persons |
| Zero degree damage | 50 |
| Mild damage | 0 |
| Moderate injury | 1 |
| Severe injury | 0 |
| Destroy/death | 4 |
3. Damage condition of subsystem 1
Subsystem 1 numbering: 1
The critical distances corresponding to different levels of damage of the subsystem 1 under the action of the shock wave are as follows:
231.0 m of zero degree damage
98.0 m for mild damage
Moderate damage of 71.0 m
45.0 m for severe injury
29.0 m for destruction/death
1) Shock wave overpressure: 0.1034 MPa;
grade of damage: zero degree damage;
the characteristics of damage: the subsystem 1 is substantially non-destructive.
2) Vibration acceleration/action time: 1.6259 meters per second;
grade of damage: zero degree damage;
the characteristics of damage: the subsystem 1 is substantially non-destructive.
4. Damage condition of subsystem 2
Subsystem 2 is numbered: 1
The critical distances corresponding to different levels of damage of the subsystem 2 under the action of the shock wave are as follows:
zero degree damage 199.0 m
98.0 m for mild damage
Medium damage of 55.0 m
38.0 m for severe injury
25.0 m for destruction/death
1) Shock wave overpressure: 0.0801 MPa;
grade of damage: moderate damage;
the characteristics of damage: most of the air pipes are deformed and damaged, and a small part of valves are damaged.
2) Vibration acceleration and action time: 0.7531 meters per second;
grade of damage: zero degree damage;
the characteristics of damage: the subsystem 2 is substantially non-destructive.
5. Damage condition of subsystem 3
Subsystem 3 numbering: 1
The critical distances corresponding to different levels of damage of the subsystem 3 under the action of the shock wave are as follows:
339.0 m for zero damage (no damage in subsystem 3)
Light damage (subsystem 3 light damage characteristic) 115.0 m
Medium damage (medium damage characteristic of subsystem 3) is 55.0 m
38.0 m for severe injury (subsystem 3 severe injury characteristic)
25.0 m for destruction/death (complete damage characteristic of subsystem 3)
1) Shock wave overpressure: 0.0801 MPa;
grade of damage: moderate damage;
the characteristics of damage: the subsystem 3 is of moderate destruction character.
2) Vibration acceleration/action time: 0.7531 meters per second;
grade of damage: zero degree damage;
the characteristics of damage: the subsystem 3 is substantially non-destructive.
6. Damage condition of subsystem 4
Subsystem 4 numbering: 1
The critical distances corresponding to different levels of damage of the subsystem 4 under the action of the shock wave are as follows:
154.0 m of zero damage (basically no damage to the subsystem 4)
Mild damage of 55.0 m
Medium damage of 25.0 m
16.0 m for severe injury
12.0 m for destruction/death
1) Shock wave overpressure: 0.0801 MPa;
grade of damage: mild damage;
the characteristics of damage: the reservoir is deformed and damaged.
2) Vibration acceleration/action time: 0.7531 meters per second;
grade of damage: zero degree damage;
the characteristics of damage: the subsystem 4 is substantially non-destructive.
Step four: establishing a functional damage model, and carrying out functional damage evaluation on underground structural components and subsystems by combining physical damage evaluation results;
step five: and establishing a damage evaluation model, and finally obtaining an evaluation conclusion of the damage effect of the underground structure system by combining the damage evaluation results of the functions of the underground structure parts and the subsystems.
The system damage assessment conclusions are as follows:
the total damage degree of the functions of the personnel is as follows: 58.1 percent
The total functional damage degree of the subsystem 1 is as follows: 0.00 percent
The total functional damage degree of the subsystem 2 is as follows: 36.7 percent
The total damage degree of the functions of the subsystem 3 is as follows: 39.2 percent
The total functional damage degree of the subsystem 4 is as follows: 29.8 percent
The total damage degree of the target functions is as follows: 88.7 percent.
The present invention is not described in detail in the prior art.
Claims (3)
1. A method for evaluating damage of an underground structure based on complex effect field calculation is characterized by comprising the following steps:
the method comprises the following steps:
the method comprises the following steps: determining underground structure target parameters, attack ammunition parameters and ammunition intersection parameters;
step two: according to the damage mechanism, carrying out the damage effect calculation of a complex effect field, wherein the calculation steps are as follows:
1) calculating according to the parameters determined in the first step and through a penetration effect to obtain a motion track of a weapon after invading a target, and calculating and determining a specific position where the incoming ammunition invades an underground structure when igniting according to the acting time of a detonator;
2) calculating a target structure collapse result according to the parameters determined in the step one and the specific position of the underground structure invaded by the incoming ammunition when being ignited, and determining the damage grade and the characteristics of the target structure according to the result; the calculation formula is as follows:
in the formula, the collapse coefficient K Z Values correspond to different macroscopic damage degrees, H is the structure thickness, C is the TNT explosive loading amount, and e is the distance from the center of explosion to the explosion-facing surface;
3) according to the parameters determined in the first step, further determining a damage mode of the underground structure by combining penetration effect calculation and a target structure collapse result;
4) calling different weapon effect engineering calculation modules according to the parameters determined in the step one and different damage modes to obtain shock wave loads and earthquake dynamic loads acting on internal components and equipment;
step three: comparing the shock wave load and the earthquake dynamic load which are obtained in the step two and act on the internal component and the equipment with a standard damage criterion, determining the damage grade of the internal component and the equipment, obtaining the physical damage of the underground structural component and the equipment, and then carrying out physical damage analysis on the whole engineering to obtain a physical damage evaluation result;
step four: establishing a functional damage model, and carrying out functional damage evaluation on underground structural components and subsystems by combining physical damage evaluation results;
step five: and establishing a damage evaluation model, and finally obtaining an evaluation conclusion of the damage effect of the underground structure system by combining the damage evaluation results of the functions of the underground structure parts and the subsystems.
2. The method for evaluating damage to underground structure based on complex effect field calculation as claimed in claim 1, wherein: the target parameters of the underground structure in the first step comprise: the number of target entrances and exits, the form of the target entrances and exits, target head structural parameters, target internal space distribution, target plane arrangement, target plane size, target material composition, basic physical and mechanical properties of the target, the number of facility equipment in the target, position distribution of the facility equipment in the target and subsystem parameters; the first step of the incoming ammunition parameters comprises the following steps: the number, type, total weight, loading quantity, caliber and head slenderness ratio of the incoming ammunition; the bullet mesh intersection parameters in the first step comprise a bullet impact angle, an attack angle, an initial speed, a target landing speed, a drop point coordinate and fuze delay.
3. The method for evaluating damage to underground structure based on complex effect field calculation as claimed in claim 1, wherein: the second step of the damage mode includes A, B, C, mode A means that the target head structure is not penetrated and not blasted, mode B means that the target head structure is not penetrated and blasted, and mode C means that the target head structure is penetrated to form an explosion in the structure.
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