A method for calculating damage deformation of a cabin structure under an in-cabin explosion

Abstract

This invention discloses a method for calculating the damage and deformation of a compartment structure under an internal explosion, relating to the field of ship damage and protection technology. The method includes: calculating the local damage area formed by the shock wave load on each compartment wall structure during the explosion; calculating the quasi-static pressure load on the exploded compartment; calculating the maximum overall deflection of each compartment wall structure under the coupled action of the two loads based on the energy method; determining the degree of damage to each compartment wall structure; if overall damage to the wall structure occurs, calculating the quasi-static pressure load on the adjacent damaged compartments, and calculating the maximum overall deflection of each compartment wall structure under the quasi-static pressure load; re-performing the determination of the degree of damage to each compartment wall structure until the deformation and damage status of all compartments is obtained. This method comprehensively considers the coupled loading effect of the two loads on the compartment structure under implosion, enabling rapid and accurate assessment of the damage and deformation status of the compartment structure under an internal explosion.

Description

Technical Field

[0001] This invention relates to the field of ship damage and protection technology, and in particular to a method for calculating the structural damage and deformation of a compartment under an internal explosion. Background Technology

[0002] Semi-armor-piercing anti-ship missiles rely on kinetic energy to penetrate and explode inside ships, generating multiple composite loads that can cause coupled damage to the ship's structure and equipment, posing a major threat to surface ships today. Compared to open environments, internal explosions can cause more complex and destructive damage to ship structures. On one hand, the loads generated during an internal explosion are numerous, including transient high-impact loads and wall reflection loads, as well as quasi-static pressure loads caused by the expansion of detonation products and subsequent combustion. The frequency components of these loads differ significantly, making the damage process to ship structures under internal explosions more complex. This involves the coupled application of various loads and the evolution and transformation between different structural failure modes. On the other hand, the damage and deformation of the compartment structure further affect the loads, showing a strong coupling relationship between structural damage and deformation and loads. How to assess the damage and deformation calculation of compartment structures under internal explosions remains a major challenge. Summary of the Invention

[0003] In response to the above-mentioned problems and technical requirements, the inventors have proposed a method for calculating the damage and deformation of a compartment structure under an internal explosion. This method solves the major problem of calculating the damage and deformation of a compartment structure under an internal explosion at the current stage, and provides important support for the protective design of ship structures against air weapons.

[0004] The technical solution of the present invention is as follows:

[0005] A method for calculating the structural damage and deformation of a compartment under an internal explosion includes the following steps:

[0006] Calculate the localized damage area of ​​the bulkhead structure of each compartment under the shock wave load during the explosion;

[0007] The quasi-static pressure load of the explosion chamber is calculated based on the local damaged area.

[0008] Based on the energy method, the maximum overall deflection of the bulkhead structure of each compartment in the explosion chamber was calculated under shock wave load and quasi-static pressure load respectively.

[0009] The extent of damage to the bulkhead structure of each compartment in the explosion zone is determined based on the maximum overall deformation deflection.

[0010] If the overall structure of the bulkhead of the explosion compartment is destroyed, the quasi-static pressure load of the damaged compartment adjacent to the explosion compartment is calculated, and the maximum deflection of the overall deformation of each bulkhead structure of the damaged compartment under the action of the quasi-static pressure load is calculated based on the energy method.

[0011] The process of determining the extent of damage to the bulkhead structure of each damaged compartment based on the maximum deflection of the overall deformation is repeated until the deformation and damage status of all compartments is obtained.

[0012] A further technical solution involves calculating the localized damage area of ​​each compartment's bulkhead structure caused by the shock wave load, including:

[0013] Calculate the energy of the shock wave load acting on each bulkhead structural plate of the explosion compartment. The bulkhead structural plate is a closed area enclosed by longitudinal and transverse stiffeners.

[0014] The extent of damage to each bulkhead structural panel is determined based on energy levels.

[0015] If a panel of a bulkhead structure is torn, the area of ​​that panel is considered the damaged area. The areas of all panels in the bulkhead structure are then summed to obtain the local damaged area of ​​each bulkhead structure in the explosion-affected compartment.

[0016] If the bulkhead structural panels are not torn, the localized area of ​​damage to the bulkhead structure is zero.

[0017] A further technical solution involves calculating the quasi-static pressure load of the explosion chamber based on the local damaged area, expressed as:

[0018]

[0019] Among them, P qs V1 is the quasi-static pressure load of the explosion chamber, and V is the volume of the explosion chamber. n Let r0 be the volume of the explosive compartment and the adjacent damaged compartments, r1 be the equivalent sphere radius of the explosive charge, and r1 be the equivalent radius of the local damaged area.

[0020] In the method for calculating the quasi-static pressure load of the damaged compartment adjacent to the explosion compartment, the explosion compartment-related parameters in the expression for calculating the quasi-static pressure load of the explosion compartment need to be updated to the damaged compartment-related parameters, while the other parameters remain unchanged.

[0021] A further technical solution involves calculating the maximum overall deflection of the bulkhead structure of each compartment under shock wave load, based on the energy method. The expression is as follows:

[0022]

[0023]

[0024] By combining the two equations, we can solve for the maximum overall deflection of the bulkhead structure of each compartment under the action of shock wave load, denoted as w1.

[0025] In the formula, E kLet m be the initial kinetic energy of the explosive charge, ρ be the density of the bulkhead material, h be the thickness of the bulkhead structure, and (x,y) be the location of the measuring point on the bulkhead structure. i ,y i ) represents the location of stiffening on the bulkhead structure, σ d Let A be the dynamic yield strength of the bulkhead material, where a is half the length of the long side of the bulkhead structure, b is half the length of the short side of the bulkhead structure, and A is... xi A yi The cross-sectional areas of the transverse and longitudinal reinforcements are M, respectively. xi M yi These are the ultimate bending moments for transverse reinforcement and longitudinal reinforcement, respectively.

[0026] A further technical solution involves calculating the maximum overall deflection of the bulkhead structure of each compartment under quasi-static pressure load, based on the energy method. The expression is as follows:

[0027]

[0028]

[0029] By combining the two equations, we can solve for the maximum overall deflection of the bulkhead structure of each compartment under quasi-static pressure load, denoted as w2.

[0030] In the formula, W represents the work done by the quasi-static pressure load, and P... qs Let h be the quasi-static pressure load of the explosive compartment, h be the thickness of the bulkhead structure, and (x,y) be the location of the measuring point on the bulkhead structure. i ,y i ) represents the location of stiffening on the bulkhead structure, σ d Let A be the dynamic yield strength of the bulkhead material, where a is half the length of the long side of the bulkhead structure, b is half the length of the short side of the bulkhead structure, and A is... xi A yi The cross-sectional areas of the transverse and longitudinal reinforcements are M, respectively. xi M yi These are the ultimate bending moments for transverse reinforcement and longitudinal reinforcement, respectively.

[0031] In the method for calculating the maximum overall deformation of each bulkhead structure of a damaged compartment under quasi-static pressure load based on the energy method, the parameters related to the explosion compartment in the expression for calculating the maximum overall deformation of each bulkhead structure of the explosion compartment need to be updated to the parameters related to the damaged compartment, while the other parameters remain unchanged.

[0032] The further technical solution is to determine the degree of damage to each bulkhead structure of the explosion-affected compartment based on the maximum overall deformation deflection, including, for each bulkhead structure:

[0033] The maximum deflection of the overall deformation of the cabin wall structure during the explosion is superimposed and expressed as: w = w1 + w2;

[0034] When the sum of the maximum deflections of the superimposed overall deformation exceeds 20% of the short side span of the bulkhead structure, the explosion is considered to have caused overall damage to the bulkhead structure; otherwise, it is considered not to have caused overall damage.

[0035] Where w1 is the maximum overall deflection of the bulkhead structure of each compartment under the action of shock wave load, and w2 is the maximum overall deflection of the bulkhead structure of each compartment under the action of quasi-static pressure load.

[0036] In the method for determining the degree of damage to each bulkhead structure of a damaged compartment based on the maximum deflection of the overall deformation, the "explosion compartment" in the method for determining the degree of damage to each bulkhead structure of the explosion compartment needs to be updated to "damaged compartment". The rest are the same as this method.

[0037] A further technical solution involves calculating the energy of the shock wave load acting on the structural panels of each compartment in the explosion zone, including:

[0038] The initial kinetic energy of the structural plates of each compartment wall under the shock wave load during the explosion is calculated using the following expression:

[0039]

[0040] The ultimate energy absorption of the shock wave load on the structural panels of each compartment in the explosion chamber is calculated using the following expression:

[0041]

[0042] Where m is the mass of the medicine package, ρ is the density of the bulkhead material, h1 is the equivalent thickness of the bulkhead structural plate, (x,y) is the position of the measuring point on the bulkhead structural plate, and σ d Let a1 be the dynamic yield strength of the bulkhead material, and b1 be half the length of the long side of the bulkhead structural plate and b1 be half the length of the short side of the bulkhead structural plate.

[0043] Its further technical solution is to determine the degree of damage to each bulkhead structural panel based on energy, including:

[0044] Compare the initial kinetic energy and ultimate energy absorption of each bulkhead structural panel under shock wave load. If E k1 >E g1 If the bulkhead structural panels show signs of tearing, then the bulkhead structural panels will show signs of tearing; otherwise, the bulkhead structural panels will not show signs of tearing.

[0045] The beneficial technical effects of this invention are:

[0046] The above method comprehensively considers the coupled loading effects of important damage elements such as shock wave load and quasi-static pressure load formed by internal explosion on the compartment structure. It establishes the relationship between quasi-static pressure load and the local damage area of ​​the compartment during the explosion. It also considers the influence of compartment structure damage on quasi-static pressure load, as well as the deformation energy dissipation of complex structural features such as flat plates and stiffeners in the compartment structure. It can be used not only to evaluate the damage deformation of the structure in the compartment during the explosion, but also to evaluate the damage deformation of the structure in adjacent compartments. The calculation results are reliable and can comprehensively evaluate the damage deformation of ship compartment structures under internal explosion, providing important support for the design of ship structures to resist internal explosion. Attached Figure Description

[0047] Figure 1 This is a flowchart of the calculation method for structural damage and deformation of a compartment under an internal explosion, provided in this application.

[0048] Figure 2 This is a schematic diagram of the structure of each compartment of the ship provided in this application. Detailed Implementation

[0049] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0050] Please refer to Figure 1 As shown, this embodiment provides a method for calculating the damage and deformation of a compartment structure under an internal explosion. It comprehensively considers the coupled loading effects of the shock wave load and quasi-static pressure load on the compartment structure under implosion, as well as the influence of the damage to the compartment structure on the quasi-static pressure load and the deformation energy dissipation of complex features such as flat plates and stiffened structures. Specifically, it includes the following steps:

[0051] Step 0: Determine the parameters of the medicine package, the structural model of the compartment, and the material parameters.

[0052] The parameters of the explosive charge include detonation distance R, mass m, equivalent sphere radius r0, and impulse I. r The main structural parameters of the compartment include the length L, width B, half of the length (long side) a (L / 2), half of the width (short side) b (B / 2), bulkhead thickness h, compartment volume V, and dynamic yield strength σ of the bulkhead material. d , density ρ of bulkhead material, location of stiffeners on bulkhead structure (x i ,y i ), the reinforced cross-sectional area A i The ultimate bending moment M of the reinforcement i Deformation and deflection w of the bulkhead structure; kinetic energy E of the bulkhead structure k The bulkhead structure includes the four side walls that make up the compartment and the upper and lower decks.

[0053] Step 1: Calculate the localized damage area caused by the shock wave load on the bulkhead structure of each compartment during the explosion, including:

[0054] Step 11: Calculate the energy of the shock wave load acting on the structural plates of each compartment wall in the explosion chamber.

[0055] The strong shock wave load generated after the explosive charge detonates is transferred to the compartment structure through fluid-structure interaction, and is thus converted into the initial kinetic energy E of the compartment structure. k The expression is:

[0056]

[0057]

[0058] Combining the two equations, we obtain the following expression for calculating the initial kinetic energy of the shock wave load acting on the structural plates of each compartment in the explosion chamber:

[0059]

[0060] The ultimate energy absorption of the shock wave load on the structural panels of each compartment in the explosion chamber is calculated using the following expression:

[0061]

[0062] Where h1 is the equivalent thickness of the bulkhead structural plate, (x,y) is the position of the measuring point on the bulkhead structural plate, a1 is half of the long side of the bulkhead structural plate, b1 is half of the short side of the bulkhead structural plate, and the bulkhead structural plate is a closed area enclosed by longitudinal and transverse stiffeners.

[0063] Step 12: Determine the degree of damage to each bulkhead structural panel based on energy levels, including:

[0064] Compare the initial kinetic energy E of each bulkhead structural panel under shock wave load. k1 With the ultimate energy absorption E g1 As a failure criterion for the damaged area of ​​the plate grid, if E k1 >E g1 If the bulkhead structural panels show signs of tearing, then the bulkhead structural panels will show signs of tearing; otherwise, the bulkhead structural panels will not show signs of tearing.

[0065] Step 13: If a panel of the bulkhead structure is torn, the area of ​​that panel is considered as the damaged area. The areas of the panels of each bulkhead structure are summed to obtain the local damaged area of ​​each bulkhead structure in the explosion compartment.

[0066] If the bulkhead structural panels are not torn, the localized area of ​​damage to the bulkhead structure is zero.

[0067] Step 2: Calculate the quasi-static pressure load of the explosion chamber based on the location of the detonation point and the local damaged area. The expression is:

[0068]

[0069] Among them, P qs V1 is the quasi-static pressure load of the explosion chamber, and V is the volume of the explosion chamber. n Let r1 be the volume of the exploded compartment and the adjacent damaged compartments, and r1 be the equivalent radius of the local damaged area.

[0070] When the explosion does not cause tearing in the bulkhead structure, the corresponding quasi-static pressure load calculation expression is:

[0071]

[0072] Step 3: Based on the energy method, calculate the maximum overall deflection of the bulkhead structure of each compartment under the shock wave load, including:

[0073] The initial kinetic energy of the bulkhead structure of the explosion chamber under the shock wave load can be expressed as:

[0074]

[0075] The energy dissipation of the compartment structure mainly consists of the tensile deformation energy of the bulkhead, the bending deformation energy of the bulkhead, the tensile deformation energy of the longitudinal stiffeners, the bending deformation energy of the longitudinal stiffeners, the tensile deformation energy of the transverse stiffeners, and the bending deformation energy of the transverse stiffeners, corresponding to each term in equation (6). The large deformation mode of the compartment structure is as follows:

[0076]

[0077] Equation (4) is deformed and expanded according to the form of Equation (5). Note that the energy integral calculation of the shock wave load acting on the bulkhead structure of each compartment in the explosion compartment should be subtracted from the damaged area calculated in step 1. The overall deformation calculation formula of each bulkhead structure of the explosion compartment under the action of shock wave load is as follows:

[0078]

[0079] Combine equations (4) and (6) to solve for the maximum overall deflection of the bulkhead structure of each compartment under the action of shock wave load, denoted as w1.

[0080] In the above formula, A xi A yi The cross-sectional areas of the transverse and longitudinal reinforcements are M, respectively. xi M yi These are the ultimate bending moments for transverse reinforcement and longitudinal reinforcement, respectively.

[0081] Step 4: Based on the energy method, calculate the maximum overall deflection of the bulkhead structure of each compartment under quasi-static pressure load during the explosion, including:

[0082] The work done by the quasi-static pressure load is expressed as follows:

[0083]

[0084] Similarly, the energy consumption of the cabin structure is mainly the tensile deformation energy of the cabin wall, the bending deformation energy of the cabin wall, the tensile deformation energy of the longitudinal stiffener, the bending deformation energy of the longitudinal stiffener, the tensile deformation energy of the transverse stiffener, and the bending deformation energy of the transverse stiffener, which correspond to each term of equation (8).

[0085] Equation (7) is deformed and expanded according to the form of equation (5), and the overall deformation calculation formula of each bulkhead structure of the explosion compartment under quasi-static pressure load is obtained as follows:

[0086]

[0087] Combine equations (7) and (8) to solve for the maximum overall deflection of the bulkhead structure of each compartment under quasi-static pressure load, denoted as w2.

[0088] Step 5: Determine the degree of damage to each bulkhead structure in the explosion-affected compartment based on the maximum overall deformation deflection, including, for each bulkhead structure:

[0089] Step 51: The maximum deflection of the overall deformation of the bulkhead structure during the explosion is superimposed and expressed as: w = w1 + w2.

[0090] Step 52: Compare the sum of the maximum deflection w of the superimposed overall deformation with the short side span b of the cabin bulkhead structure as the failure criterion for the cabin structural components. When w > 0.2 × b, it is considered that the cabin bulkhead structure of the explosion has been completely destroyed; otherwise, it is considered that no overall destruction has occurred.

[0091] Step 6: If the overall structure of the explosive compartment fails, calculate the quasi-static pressure load of the damaged compartment adjacent to the explosive compartment. The expression is given by reference to equation (3), where P qs V is the quasi-static pressure load of the damaged compartment, V1 is the volume of the damaged compartment, and V n This is the sum of the volumes of the damaged compartment and the adjacent damaged compartment.

[0092] Step 7: Based on the energy method, calculate the maximum overall deflection of each bulkhead structure of the damaged compartment under quasi-static pressure load. The calculation method is the same as in Step 4. Only the relevant parameters of the explosion compartment need to be updated to the relevant parameters of the damaged compartment, and the other parameters remain unchanged.

[0093] Repeat the process of determining the degree of damage to each bulkhead structure of the damaged compartment based on the maximum overall deformation deflection until the deformation and damage status of all compartments is obtained. Refer to step 5, where w1 and w2 are the maximum overall deformation deflections of each bulkhead structure of the damaged compartment under the action of shock wave load and quasi-static pressure load, respectively, and b is the short side span of the bulkhead structure of the damaged compartment.

[0094] like Figure 2 As shown, in one embodiment, a given explosive charge mass m is 2.66 kg, placed between the upper deck 1 and lower deck 2 (which also serves as the upper deck of an adjacent compartment) of the explosion compartment. The upper deck 1 has a thickness of 4.5 mm, a transverse stiffening spacing of 0.2 m, a longitudinal stiffening spacing of 0.5 m, and stiffening dimensions of [missing information]. The lower deck 2 has a thickness of 0.0025mm, with transverse stiffener spacing of 0.2m and longitudinal stiffener spacing of 0.48m. The stiffener dimensions are as follows: The lower deck 3 of the adjacent compartment has a thickness of 0.0025mm, a transverse stiffening spacing of 0.2m, a longitudinal stiffening spacing of 0.48m, and stiffening dimensions of [missing information]. The distance B between the fore and aft bulkheads of the explosion compartment was 3.4m, the bulkhead thickness was 2mm, the longitudinal stiffening spacing was 0.48m, and the stiffening dimensions were... The structural parameters of the lower deck 4 of the other adjacent compartments are given above...; During the explosion, the distance L between the left and right bulkheads of the compartment is 2m, the bulkhead thickness is 2mm, the stiffener spacing is 0.2m, and the stiffener dimensions are... The cabin structure material is Q355B, with a dynamic yield strength σ. d Take 525 MPa.

[0095] 1) Calculate the local damage area of ​​each compartment wall structure under the strong shock wave load during the explosion.

[0096] For the upper deck 1, the material is Q355B steel, the plate thickness h is 4.5mm, and the dynamic yield strength σ d The pressure is 525 MPa. The dimensions of the plate grid closest to the detonation point are 200 × 480 mm. The mass of the explosive charge (m) is 2.66 kg. The detonation distance (R) is 0.27 m. Then, the energy acting on the plate grid is:

[0097]

[0098]

[0099] in, Compare the initial kinetic energy E k1 With the ultimate energy absorption E g1 The conclusion is that the plate did not tear, meaning that the upper deck 1 did not tear under the shock wave load.

[0100] For the lower deck 2, the material is Q355B steel, the plate thickness h is 2.5mm, and the dynamic yield strength σ d The pressure is 525 MPa. The dimensions of the plate grid closest to the detonation point are 200 × 480 mm. The mass of the explosive charge (m) is 2.66 kg. The detonation distance (R) is 0.27 m. Then, the energy acting on the plate grid is:

[0101]

[0102]

[0103] Compare the initial kinetic energy E k1 With the ultimate energy absorption E g1 The analysis concluded that the lattice panels tore, indicating localized damage to the lower deck 2 under the shock wave load. Calculations of each lattice panel revealed a damage area of ​​four panels, totaling 0.384 m². 2 The equivalent radius r1 is 0.35m.

[0104] Similarly, calculations showed that no localized damage was found in the left and right bulkheads, or the front and rear bulkheads of the compartment where the explosion occurred.

[0105] After the test, the explosion occurred only on the upper deck 1 of the compartment, which was basically consistent with the calculation results.

[0106] 2) Calculation of large deformation of each component of the cabin structure under the coupled action of shock wave load and quasi-static pressure load. The calculation results are shown in Table 1.

[0107] Table 1. List of Deformation Results of Components Under Explosion Inside the Cabin

[0108]

[0109] As shown in Table 1, the calculation results using the method provided in this application are basically consistent with the experimental results. The failure criteria for local damage areas of the cabin structure and the failure criteria for overall deformation of cabin structure components proposed in this application are based on numerous related experiments conducted by our unit over many years. The criteria are scientifically sound and the calculation results are reliable.

[0110] The above descriptions are merely preferred embodiments of this application, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included within the protection scope of the present invention.

Claims

1. A method for calculating the structural damage and deformation of a compartment under an internal explosion, characterized in that, The method includes: Calculate the localized damage area of ​​the bulkhead structure of each compartment under the shock wave load during the explosion; The quasi-static pressure load of the explosion chamber is calculated based on the local damaged area. Based on the energy method, the maximum overall deflection of the bulkhead structure of each compartment in the explosion chamber was calculated under shock wave load and quasi-static pressure load respectively. The extent of damage to the bulkhead structure of each compartment in the explosion zone is determined based on the maximum overall deformation deflection. If the overall structure of the bulkhead of the explosion compartment is destroyed, the quasi-static pressure load of the damaged compartment adjacent to the explosion compartment is calculated, and the maximum deflection of the overall deformation of each bulkhead structure of the damaged compartment under the action of the quasi-static pressure load is calculated based on the energy method. The process of determining the degree of damage to each bulkhead structure of the damaged compartment based on the maximum deflection of the overall deformation is repeated until the deformation and damage status of all compartments is obtained. The calculation of the local damage area of ​​each compartment's bulkhead structure under the shock wave load during the explosion includes: Calculate the energy of the shock wave load acting on each structural panel of the explosive compartment, wherein the structural panel is a closed area enclosed by longitudinal and transverse stiffeners; The degree of damage to each bulkhead structural panel is determined based on the energy level. If a panel of a bulkhead structure is torn, the area of ​​that panel is considered the damaged area. The areas of all panels in the bulkhead structure are then summed to obtain the local damaged area of ​​each bulkhead structure in the explosion-affected compartment. If the bulkhead structural panels are not torn, the local damaged area of ​​the bulkhead structure is zero. The quasi-static pressure load of the explosion chamber is calculated based on the local damaged area, and the expression is as follows: ； in, The quasi-static pressure load of the explosion chamber. V 1 represents the volume of the chamber during the explosion. V n The sum of the volumes of the explosion compartment and the adjacent damaged compartments. r 0 represents the radius of the equivalent sphere of the medicine pack. r 1 represents the equivalent radius of the locally damaged area. m For the quality of the medicine packaging; In the method for calculating the quasi-static pressure load of the damaged compartment adjacent to the explosion compartment, the explosion compartment-related parameters in the expression for calculating the quasi-static pressure load of the explosion compartment need to be updated to the damaged compartment-related parameters, while the other parameters remain unchanged. The determination of the degree of damage to each bulkhead structure in the explosion-affected compartment based on the maximum deflection of the overall deformation includes, for each bulkhead structure: The maximum deflection of the overall deformation of the compartment bulkhead structure during the explosion is superimposed and expressed as: ; When the sum of the maximum deflections of the superimposed overall deformation exceeds 20% of the short side span of the bulkhead structure, the explosion is considered to have caused overall damage to the bulkhead structure; otherwise, it is considered not to have caused overall damage. in, This represents the maximum overall deflection of the bulkhead structure of each compartment under the action of shock wave load during an explosion. The maximum overall deflection of the bulkhead structure of each compartment under quasi-static pressure load during an explosion. In the method for determining the degree of damage to each bulkhead structure of the damaged compartment based on the maximum deflection of the overall deformation, the "explosion compartment" in the method for determining the degree of damage to each bulkhead structure of the explosion compartment needs to be updated to "damaged compartment". The rest are the same as this method.

2. The method for calculating the structural damage and deformation of a compartment under an internal explosion according to claim 1, characterized in that, Based on the energy method, the maximum overall deflection of the bulkhead structure of each compartment under shock wave load is calculated, and the expression is: ； ； By combining the two equations, we can solve for the maximum overall deflection of the bulkhead structure of each compartment under the shock wave load during the explosion, denoted as . ; In the formula, The initial kinetic energy of the shock wave load acting on the bulkhead structure of each compartment during the explosion. m For the quality of the medicine package, For the density of the bulkhead material, h For the thickness of the bulkhead structure, ( x , y ) represents the location of the measuring point on the bulkhead structure. x i , y i () indicates the location of stiffening on the bulkhead structure. The dynamic yield strength of the bulkhead material. a Half of the long side of the bulkhead structure b It is half the length of the shorter side of the bulkhead structure. , These are the cross-sectional areas of the transverse reinforcement and the longitudinal reinforcement, respectively. , These are the ultimate bending moments for transverse reinforcement and longitudinal reinforcement, respectively.

3. The method for calculating the structural damage and deformation of a compartment under an internal explosion according to claim 1, characterized in that, Based on the energy method, the maximum overall deflection of the bulkhead structure of each compartment under quasi-static pressure load during an explosion is calculated, and the expression is: ； ； By combining the two equations, we can solve for the maximum overall deflection of the bulkhead structure of the explosive compartment under quasi-static pressure load, denoted as . ; In the formula, W Work done for quasi-static pressure load The quasi-static pressure load of the explosion chamber. h For the thickness of the bulkhead structure, ( x , y ) represents the location of the measuring point on the bulkhead structure. x i , y i () indicates the location of stiffening on the bulkhead structure. The dynamic yield strength of the bulkhead material. a Half of the long side of the bulkhead structure b It is half the length of the shorter side of the bulkhead structure. , These are the cross-sectional areas of the transverse reinforcement and the longitudinal reinforcement, respectively. , These are the ultimate bending moments for transverse reinforcement and longitudinal reinforcement, respectively. In the method for calculating the maximum overall deformation of each bulkhead structure of a damaged compartment under quasi-static pressure load based on the energy method, the explosion-related parameters in the expression for calculating the maximum overall deformation of each bulkhead structure of the explosion-prone compartment need to be updated to the damaged compartment-related parameters, while the other parameters remain unchanged.

4. The method for calculating the structural damage and deformation of a compartment under an internal explosion according to claim 1, characterized in that, The calculation of the energy of the shock wave load acting on the structural panels of each compartment in the explosion includes: Calculate the initial kinetic energy of the shock wave load acting on the structural panels of each compartment during the explosion. The expression is: ； Calculate the ultimate energy absorption of the shock wave load on the structural panels of each compartment during the explosion. The expression is: ； in, m For the quality of the medicine package, For the density of the bulkhead material, For the equivalent thickness of the bulkhead structural plate, ( x , y () represents the location of the measuring point on the bulkhead structural plate. The dynamic yield strength of the bulkhead material. Half of the long side of the bulkhead structural panel It is half the short side of the bulkhead structural panel.

5. The method for calculating the structural damage and deformation of a compartment under an internal explosion according to claim 4, characterized in that, The determination of the degree of damage to each bulkhead structural panel based on the energy includes: Compare the initial kinetic energy and ultimate energy absorption of each bulkhead structural panel under shock wave load. > If the bulkhead structural panels show signs of tearing, then the bulkhead structural panels will show signs of tearing; otherwise, the bulkhead structural panels will not show signs of tearing.

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