CN109738148B - Method for calculating overpressure of rear shock wave of front explosion door of underground engineering protective door - Google Patents
Method for calculating overpressure of rear shock wave of front explosion door of underground engineering protective door Download PDFInfo
- Publication number
- CN109738148B CN109738148B CN201811539316.2A CN201811539316A CN109738148B CN 109738148 B CN109738148 B CN 109738148B CN 201811539316 A CN201811539316 A CN 201811539316A CN 109738148 B CN109738148 B CN 109738148B
- Authority
- CN
- China
- Prior art keywords
- explosion
- door
- overpressure
- point
- ammunition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention discloses an undergroundThe method for calculating the overpressure of the rear shock wave of the front explosion door of the engineering protection door comprises the following steps: step one, acquiring overpressure test data of explosion shock waves generated by exploding ammunition in front of a door and exploding ammunition behind the door; step two, establishing an explosion shock wave overpressure calculation formula generated after the ammunition explodes in front of the door and behind the door; step three, fitting an explosion shock wave overpressure calculation formula generated after the ammunition explodes in front of the door and the door
The value of (d); and step four, calculating the overpressure of the explosion shock wave generated behind the door when the ammunition explodes in front of the door. The method for calculating the overpressure of the rear shock wave of the front explosion door of the underground engineering protective door obtains a calculation formula of the overpressure of the explosion shock wave generated by the ammunition exploding in front of the door and in the rear of the door, so that the calculation of the overpressure of the explosion shock wave generated by the ammunition exploding in front of the door and in the rear of the door becomes quick, and time and labor are saved.
Description
Technical Field
The invention relates to the technical field of calculation of overpressure of rear shock waves of a front explosion door of an underground engineering protective door, in particular to a calculation method of overpressure of rear shock waves of the front explosion door of the underground engineering protective door.
Background
Underground works are widely applied to military and civil buildings, and in the aspect of military, along with the development of accurate guidance technology and the improvement of the ground drilling capability of weapons, the possibility of explosion of ammunition entering the underground works is higher and higher. Particularly, as large civil underground projects such as subways and the like are continuously put into use, the probability of terrorist attacks and accidental explosions is greatly increased due to the dense mobile population of the places. The method for calculating the overpressure of the rear shock wave of the front explosion door of the underground engineering protective door has great significance for protecting personnel and materials behind the protective door.
The test of the blast overpressure after explosion in underground engineering is a mature technology, has a complete explosion simulation test method and test standard, and can calculate the blast overpressure generated after the explosion of the ammunition simply and easily. However, for the working condition that a protective door is arranged in underground engineering, the calculation of the overpressure of the explosion shock wave generated by the explosion of ammunition in front of the protective door and behind the protective door does not have a complete test method and a complete test standard at present, and a calculation method for directly calculating the overpressure behind the protective door according to the working condition of the protective door is not available. The invention provides a calculation method for the overpressure of the rear shock wave of an explosion door in front of an underground engineering protective door based on the defects in the prior art, which can well solve the problems in the prior art.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a method for calculating the overpressure of the shock wave generated by the explosion of ammunition in front of and behind the door in the underground engineering protective door, the method is scientific and reasonable, and the method has high calculation accuracy, quick calculation, time saving and labor saving for the overpressure of the explosion shock wave generated by the explosion of ammunition in front of and behind the door; the ammunition explosion points are arranged at different distances in front of the underground engineering protective door, meanwhile, a plurality of groups of sensors are arranged on the walls on the two sides behind the protective door, each group of sensors corresponds to one explosion measuring point, and the sensor is used for measuring the shock wave overpressure of each explosion measuring point; then, the blast wave overpressure of a series of different working conditions at different measuring points behind the door of the explosion point can be obtained through an explosion simulation test, and then a calculation formula of the blast wave overpressure of the explosion behind the door when the ammunition explodes in front of the door is obtained through a dimensional analysis theory and fitting according to test parameters of the explosion simulation test.
The invention provides a method for calculating the overpressure of a rear shock wave of an explosion door in front of a protective door of an underground engineering, which comprises the following steps:
step one, acquiring overpressure test data of explosion shock waves generated by the ammunition exploding in front of a door and exploding behind the door: n sensors are uniformly arranged on the side walls of the two sides behind the underground engineering protective door, and one sensor corresponds to one explosion measuring point; setting the explosive loading quantity of an explosion point of the underground engineering as Q, the explosion measuring point as A, the distance between the explosion point and the protective door as L, the equivalent diameter of the underground engineering as D, and the distance between the explosion measuring point A and the protective door as X; carrying out an explosion simulation test, and measuring the shock wave overpressure at different explosion measuring points A through a sensor; obtaining a series of test data through N groups of tests with different explosion points and different dosages;
step two, establishing a calculation formula of explosion shock wave overpressure generated after ammunition is exploded in front of a door, wherein the calculation formula of the explosion shock wave overpressure △ P of an explosion measuring point A is known to have close relation with the explosive loading quantity Q of an explosion point of underground engineering, the distance L between the explosion point and a protective door, the equivalent diameter D of the underground engineering and the distance X between the explosion measuring point A and the protective door through a specific explosion simulation test in the step one, and the function formula is △ P = f (Q, L, D and X), and then the calculation formula of △ P is obtained through dimensional analysis:
；
in the formula, L is the distance between an explosion point and a protective door and has a unit of m, Q is the charge mass of the explosion point and has a unit of kg, and △ P is the shock wave overpressure of an explosion point A and has a unit of Mpa;
step three, fitting an explosion shock wave overpressure calculation formula generated by the ammunition exploding in front of the door and exploding behind the door
The numerical value of (A): substituting specific numerical values of the explosive loading Q, the distance L between the explosive point and the protective door, the equivalent diameter D of underground engineering, the distance X between the explosive point A and the protective door of the explosion simulation test in the step one into a formula in the step two for fitting to determine
The specific numerical values of (a);
step four, calculating the overpressure of the explosion shock wave generated behind the door when the ammunition explodes in front of the door: calculating the specific numerical values of the charge quantity Q of the explosion point of the underground engineering ammunition, the distance L between the explosion point and the protective door, the equivalent diameter D of the underground engineering, the distance X between the explosion measuring point A and the protective door and the steps
Substituting numerical values into formulas
The calculation yields the explosion shock wave overpressure of the ammunition when the ammunition explodes in front of the door and after the door at the explosion measuring point A.
In the first step, different explosion measuring points A correspond to different sensors, the distance between an ammunition explosion point and a protective door is L, and the distance between different explosion measuring points A and the protective door is X.
In the first step, N sensors are uniformly arranged on the side walls of the two sides behind the underground engineering protective door, and one sensor corresponds to one explosion measuring point; setting the explosive loading quantity of an ammunition explosion point as Q, the explosion measuring point as A, the distance between the ammunition explosion point and the protective door as L, the equivalent diameter of the underground engineering as D, and the distance between the explosion measuring point A and the protective door as X; the overpressure of the explosion shock wave at the measuring point A at different positions is measured by the sensor under the working conditions of different explosive quantities at different explosive points of the ammunition, and specific test data are provided for fitting of an explosion shock wave overpressure calculation formula generated by the ammunition exploding in front of the door and in back of the door in the third step.
In the second step, the specific explosion simulation test in the first step shows that the shock wave overpressure △ P of the explosion measuring point a has a close relationship with the explosive charge Q of the ammunition explosion point of the underground engineering, the distance L between the ammunition explosion point and the guard gate, the equivalent diameter D of the underground engineering, and the distance X between the explosion measuring point a and the guard gate, and the function formula is as follows:
then, a calculation formula of △ P is fitted by dimensional analysis as follows:
(ii) a The method mainly comprises the step of obtaining a calculation expression of the overpressure of the explosion shock wave generated by the ammunition exploding in front of the door and in back of the door through a dimensional analysis method.
In the third step, the charge quantity of the underground engineering ammunition explosion point, the distance L between the ammunition explosion point and the protective door, the equivalent diameter D of the underground engineering, the explosion measuring point A and the anti-explosion point in the specific explosion simulation test in the first step are calculated according to the formula in the second stepThe specific value of the distance X of the guard gate is substituted
Is determined by calculation in the formula
The specific numerical values of (a); the main purpose of doing so is to calculate the overpressure of the explosion shock wave generated by the explosion of the ammunition in front of the door and behind the door in the step two
The specific numerical value of (1).
In the fourth step, the specific numerical values of the explosive charge Q of the explosive point of the ammunition in the underground engineering, the distance L between the explosive point of the ammunition and the protective door, the equivalent diameter D of the underground engineering, the distance X between the explosive measuring point A and the protective door and the calculated values in the third step
Substituting numerical values into formulas
Calculating to obtain the overpressure of the explosion shock wave generated by the explosion of the ammunition in front of the door at an explosion measuring point A behind the door; the main purpose of doing so is to calculate the charge Q of the ammunition explosion point of the underground engineering, the distance L between the ammunition explosion point and the protective door, the equivalent diameter of the underground engineering is D, and the distance X between the explosion measuring point A and the protective door is known in the third step
Substituting numerical values into formulas
The overpressure of the explosion shock wave generated by the explosion of the ammunition in front of the door at the explosion measuring point A behind the door is calculated.
The calculation formula of the overpressure of the explosion shock wave generated by the ammunition of the invention before the door and after the door is exploded is obtained by fitting through a dimensional analysis method. The dimension analysis is a method for establishing a mathematical model in the physical field, and the relationship between various physical quantities is determined by utilizing the dimension homogeneous principle of the physical law on the basis of the test.
The invention has the beneficial effects that: the invention provides a method for calculating the overpressure of the blast wave generated by the explosion of ammunition in front of the door and behind the door in underground engineering, which is scientific and reasonable, has high calculation accuracy and is quick in calculation, time-saving and labor-saving; a calculation formula of the overpressure of the explosion shock wave generated by the ammunition exploding in front of the door and in back of the door is obtained, so that the calculation of the overpressure of the explosion shock wave generated by the ammunition exploding in front of the door and in back of the door becomes quick, and time and labor are saved.
Drawings
FIG. 1 is a schematic structural view of a rear shock wave overpressure test of an explosion door in front of an underground engineering protective door;
the labels in the figure are: 1. underground engineering, 2, a sensor, 3 and a protective door.
Detailed Description
The present invention is further described below with reference to specific examples, which are provided only for illustrating the present invention and are not intended to limit the scope of the present invention.
The invention provides a method for calculating the overpressure of a rear shock wave of an explosion door in front of a protective door of an underground engineering, which comprises the following steps:
a method for calculating the overpressure of a rear shock wave of an explosion door in front of an underground engineering protective door comprises the following steps:
step one, acquiring overpressure test data of explosion shock waves generated by the ammunition exploding in front of a door and exploding behind the door: n sensors 2 are uniformly arranged on the side walls of the two sides behind a protective door 3 of the underground engineering 1, and one sensor corresponds to one explosion measuring point; setting the explosive loading quantity of an explosion point of the underground engineering 1 as Q, an explosion measuring point as A, the distance between the explosion point and the protective door 3 as L, the equivalent diameter of the underground engineering 1 as D, and the distance between the explosion measuring point A and the protective door 3 as X; carrying out an explosion simulation test, and measuring the shock wave overpressure at different explosion measuring points A through the sensor 2; obtaining a series of test data through N groups of tests with different explosion points and different dosages;
step two, the ammunition explodes in front of the doorThe establishment of a calculation formula of the overpressure of the explosion shock wave generated behind the door can be known through a specific explosion simulation test in the step one, the overpressure △ P of the shock wave of an explosion measuring point A has close relation with the explosive charge Q of an explosion point of the underground engineering 1, the distance L between the explosion point and the protective door 3, the equivalent diameter D of the underground engineering 1 and the distance X between the explosion measuring point A and the protective door 3, and the function formula is as follows:
then, the calculation formula of △ P is obtained by dimension analysis as follows:
；
in the formula, L is the distance between an explosion point and a protective door and has the unit of m, Q is the explosive charge of the explosion point and has the unit of kg, and △ P is the shock wave overpressure of an explosion point A and has the unit of Mpa;
step three, fitting an explosion shock wave overpressure calculation formula generated by the ammunition exploding in front of the door and exploding behind the door
The numerical value of (A): substituting specific numerical values of the explosive loading Q, the distance L between an explosion point and the protective door 3, the equivalent diameter D of the underground engineering 1 and the distance X between the explosion point A and the protective door 3 into the formula in the step two
Fitting is performed to determine
The specific numerical values of (a);
step four, calculating the overpressure of the explosion shock wave generated behind the door when the ammunition explodes in front of the door: calculating the specific numerical values of the explosive charge Q of the explosive point of the ammunition in the underground engineering 1, the distance L between the explosive point and the protective door 3, the equivalent diameter D of the underground engineering 1, the distance X between the explosive measuring point A and the protective door 3 and the steps
Substituting numerical values into formulas
The calculation yields the explosion shock wave overpressure of the ammunition when the ammunition explodes in front of the door and after the door at the explosion measuring point A.
Claims (2)
1. A method for calculating overpressure of shock wave generated by explosion of ammunition in front of and behind a protection door of underground engineering is characterized in that the method comprises the steps of obtaining overpressure test data of the explosion shock wave generated by explosion of ammunition in front of and behind the protection door, uniformly arranging N sensors on the side walls on the two sides behind the protection door of the underground engineering, wherein one sensor corresponds to one explosion measuring point, setting the explosive loading quantity of the explosion point of the underground engineering as Q, the explosion measuring point as A, the distance between the explosion point and the protection door as L, the equivalent diameter of the underground engineering as D, and the distance between the explosion measuring point A and the protection door as X, carrying out an explosion simulation test, measuring the overpressure of the shock wave at different explosion measuring points A through the sensors, obtaining a series of test data through tests of different explosive quantities of N groups of different explosion points, and establishing an explosion shock wave overpressure calculation formula generated by explosion of the ammunition in front of and behind the protection door, wherein the impact wave overpressure calculation formula obtained through the specific explosion simulation test in the step I is that the overpressure calculation formula of the overpressure of the shock wave generated by the explosion at the explosion measuring point A △ P and the explosion point of the underground engineering explosion point of the underground engineering as Q, the distance between the explosion point D and the protection door as D, and the protection door, and the distance of the protection door:
in the formula, L is the distance between an explosion point and a protective door and is in unit of m, Q is the explosive point charge mass in unit of kg, △ P is the blast wave overpressure at an explosion point A and is in unit of Mpa, and step three, the fitted ammunition is exploded in front of the door and generates the blast wave overpressure behind the door
The numerical value of (A): the charging quantity Q, the explosion point and the protective door of the explosion simulation test in the step oneSubstituting the specific numerical values of the distance L, the equivalent diameter D of the underground engineering, the explosion measuring point A and the distance X of the protective door into the formula in the step two for fitting to determine
The specific numerical values of (a); step four, calculating the overpressure of the explosion shock wave generated behind the door when the ammunition explodes in front of the door: calculating the specific numerical values of the charge quantity Q of the explosion point of the underground engineering ammunition, the distance L between the explosion point and the protective door, the equivalent diameter D of the underground engineering, the distance X between the explosion measuring point A and the protective door and the steps
Substituting numerical values into formulas
The calculation yields the explosion shock wave overpressure of the ammunition when the ammunition explodes in front of the door and after the door at the explosion measuring point A.
2. The method for calculating the overpressure of the shock wave at the back of the front explosion door of the underground engineering protective door according to claim 1, wherein the method comprises the following steps: different explosion measuring points A correspond to different sensors, the distance between an ammunition explosion point and the protective door is L, and the distance between different explosion measuring points A and the protective door is X.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811539316.2A CN109738148B (en) | 2018-12-17 | 2018-12-17 | Method for calculating overpressure of rear shock wave of front explosion door of underground engineering protective door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811539316.2A CN109738148B (en) | 2018-12-17 | 2018-12-17 | Method for calculating overpressure of rear shock wave of front explosion door of underground engineering protective door |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109738148A CN109738148A (en) | 2019-05-10 |
| CN109738148B true CN109738148B (en) | 2020-06-30 |
Family
ID=66360409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811539316.2A Active CN109738148B (en) | 2018-12-17 | 2018-12-17 | Method for calculating overpressure of rear shock wave of front explosion door of underground engineering protective door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109738148B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111444566B (en) * | 2020-03-27 | 2023-05-26 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Simplified calculation method for characteristic parameters of terrorist explosion shock waves |
| CN113051715A (en) * | 2021-03-03 | 2021-06-29 | 重庆师范大学 | Method for analyzing influence of explosion of canned materials in intelligent chemical industry park |
| CN114923658B (en) * | 2022-05-18 | 2023-03-24 | 南京理工大学 | Tunnel device for researching shock wave propagation and underground structure dynamic response |
| CN116008106B (en) * | 2022-12-09 | 2023-12-22 | 南京理工大学 | Explosion-proof capacity judging method for corrugated steel plate and concrete combined structure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5014463A (en) * | 1990-03-07 | 1991-05-14 | Marcel M. Barbier, Inc. | Combination door and door frame |
| CN201738756U (en) * | 2010-07-26 | 2011-02-09 | 中国人民解放军总后勤部建筑工程研究所 | Anti-explosive impact vibration-reduction device of underground engineering protective-door |
| CN102289918B (en) * | 2011-05-05 | 2012-10-10 | 中国人民解放军防化指挥工程学院 | Civil air defense command construction protection facility monitoring system |
| CN102494830A (en) * | 2011-12-31 | 2012-06-13 | 北京理工大学 | Method for measuring explosion shock wave field strength and special-purpose pressure tank thereof |
| CN103292943A (en) * | 2012-02-27 | 2013-09-11 | 中国人民解放军总参谋部工程兵科研三所 | Non-contact type impact wave hyperpressure measuring method |
| CN105136421A (en) * | 2015-09-30 | 2015-12-09 | 中国人民解放军理工大学 | Testing apparatus of dynamic response of filler wall under combustible gas explosion |
| CN108828008B (en) * | 2018-04-19 | 2021-01-05 | 西安近代化学研究所 | Explosive internal explosion power evaluation method based on shock wave overpressure and quasi-static pressure |
-
2018
- 2018-12-17 CN CN201811539316.2A patent/CN109738148B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109738148A (en) | 2019-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109738148B (en) | Method for calculating overpressure of rear shock wave of front explosion door of underground engineering protective door | |
| CN110020482B (en) | Method for calculating overpressure reduction coefficient of shock wave in blast tunnel in front of reinforced concrete protective door | |
| CN107796646B (en) | Test device and test method for simulating blasting excavation unloading of deep-buried tunnel | |
| Remennikov et al. | Modelling blast loads on buildings in complex city geometries | |
| Rigby et al. | Validation of semi-empirical blast pressure predictions for far field explosions-is there inherent variability in blast wave parameters? | |
| Pennetier et al. | Numerical and reduced-scale experimental investigation of blast wave shape in underground transportation infrastructure | |
| CN107367203B (en) | A kind of blasting parameters optimization method ensureing above ground structure safety | |
| Chen et al. | An improved method for calculating the peak explosion pressure on the borehole wall in decoupling charge blasting | |
| CN109740199B (en) | Method for calculating overpressure of explosion shock wave in explosion underground engineering in covering layer | |
| CN111444566B (en) | Simplified calculation method for characteristic parameters of terrorist explosion shock waves | |
| CN104537195A (en) | Deeply-buried rock blasting excavation induced vibration prediction method based on energy principle | |
| Hussein et al. | Blast response of a thin oriented strand board wall | |
| CN109612356A (en) | The acquisition methods of concrete duct dynamic response characteristics are closed on when excavation of foundation pit explosion | |
| CN109738143A (en) | A method of research different spatial explosion is influenced on gas pipeline is closed on | |
| Tang et al. | Reflections on variability of blast pressure measurement at different scales | |
| Richards | Elliptical airblast overpressure model | |
| Remennikov | The state of the art of explosive loads characterisation | |
| CN110346105B (en) | Response model test method for underground structure under direct impact action | |
| Wang et al. | Jet formation and penetration mechanism of W typed shaped charge | |
| CN105486452B (en) | Shock wave tests comparison-type scaling method | |
| Mellen et al. | Blast and fragmentation loading indicative of a VBIED surrogate for structural panel response analysis | |
| Li et al. | Study on influence of key blasthole parameters on tunnel overbreak | |
| Verma et al. | A comparative analysis of computation of peak overpressure in near field scenario during high energetic material's detonation | |
| Haohao et al. | Study on peak overpressure prediction of underground blasting shock waves on straight-through roadways | |
| CN116484151A (en) | Estimation method and system for throwing distance of broken block in open-air step blasting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |