CN105653772A - Method and system of PBX (Plastic-Bonded Explosives) particle compression moulding numerical simulation automatic modeling - Google Patents

Abstract

The invention discloses a method and a system of PBX (Plastic-Bonded Explosives) particle compression moulding numerical simulation automatic modeling, and belongs to a PBX particle compression moulding numerical simulation method. According to a photomicrograph of the PBX, a real PBX microstructure is obtained, a simulation parameter is input through a data processing module, and moulding processing is carried out through a model processing module and is combined with the simulation parameter input by a user in the data processing module to obtain a calculation model; and a moulding result is converted into a numerical simulation software script language code through a script file generation module and is output as a script file, and the PBX particle compression moulding numerical simulation automatic modeling is realized. The automatic moulding method can be used for utilizing a good user interface to provide a convenient moulding path for users so as to be easy in use; the output of the numerical simulation software script language is automatically finished, and the numerical simulation software script language is stored as a file which can be directly operated by the numerical simulation software; and working efficiency and model resolving accuracy are improved.

Description

A kind of PBX blasting explosive granules compression moulding numerical simulation automation modeling method and system

Technical field

The present invention relates to a kind of blasting explosive granules compression moulding and move method for numerical simulation, the particularly automation modeling of a kind of blasting explosive granules compression moulding numerical simulator.

Background technology

Bonding explosive (the Plastic-bondedexplosives of plastics, it is called for short PBX) it is the mixture that a class is grouped into by multiple one-tenth such as high explosive crystal, caking agents, make type by forming methods such as casting or compactings, it is one of main method preparing explosive element. Adopt various blasting explosive granules compacting numerical simulation software (such as NairnMPM, Uintah etc.) that the change of explosive each several part mechanical parameter can be calculated, obtain numerical value physical image in compression moulding process, analyze the thin mechanical behavior seen in explosive pressing process, it is possible to for explosive compression moulding technique and raising explosive element quality provide theoretical foundation.

In present stage explosive compression moulding model research, the Chen Lang of Beijing Institute of Technology etc. establish blasting explosive granules free accumulation computation model, and blasting explosive granules size and position are taked stochastic distribution mode. And this kind of model and real blasting explosive granules state have certain error, explosive compression moulding can not be carried out comprehensively, efficiently, analog calculation accurately.

In addition, explosive compression moulding numerical simulation software general at present, (such as NairnMPM) is the dynamic of application command driven but not the computation program of menu-drive, this just determines it and has following shortcoming in modeling process: (1) introduction difficulty is higher, not easily left-hand seat, man-machine interface is unfriendly; (2) complicated operation, cannot realize mutual change in time; (3) need to do work complicated in a large number and order input, waste time and energy; (4) artificial modeling very easily makes mistakes with input. These all use software to carry out the difficulty of numerical simulation virtually adding user.

Summary of the invention

For explosive compression moulding numerical simulation software deficiency in modeling, the present invention provides automation modeling method and the system of a kind of explosive compression moulding numerical simulator.

Explosive compression moulding numerical simulation automation modeling method is by segmenting modeling task, and specifically arrives module, calls disparate modules according to the step of modeling, it is achieved the automatization of explosive compression moulding model is set up, and the technical scheme of employing is as follows:

A kind of PBX blasting explosive granules compression moulding numerical simulation automation modeling method, comprises the following steps:

Step one, according to PBX explosive Photomicrograph, obtains real PBX explosive microscopical structure, obtains raw data, inputs as analog parameter, and described raw data comprises blasting explosive granules quantity, blasting explosive granules thickness and mechanical property thereof.

Step 2, carries out modeling process by step one gained raw data, obtains blasting explosive granules compacting model, and described blasting explosive granules compacting model comprises blasting explosive granules computation model and blasting explosive granules mechanical model.

Step 3, preserves step 2 gained blasting explosive granules compacting model.

Step 4, suppresses model generation numerical simulation software language scripts code according to step 2 gained blasting explosive granules, and generates output file.

Specifically, blasting explosive granules computation model described in step 2, comprises blasting explosive granules central coordinate of circle under rectangular coordinate system, particle diameter length, rigid pressurized face and mould coordinate computation.

Further, blasting explosive granules mechanical model described in step 2, comprises following three class data:

The material model selection of A blasting explosive granules, modulus of volume expansion, shearing modulus, Poisson's ratio, density, frictional coefficient, force-at-yield.

The material model of B rigid pressurized face and mould is selected and pressurized plane direction of motion and original speed.

The boundary bit shifting state allowed in the stress value of model boundary and numerical simulation process under C original state.

In specific embodiments of the invention, file described in step 5 is that numerical simulation software can execution script language file.

A kind of PBX blasting explosive granules compression moulding numerical simulation automation modeling system, comprises data processing module, model processing modules and script file generation module; Wherein

Described data processing module is according to PBX explosive Photomicrograph, obtain real PBX explosive microscopical structure, obtain raw data as analog parameter, carry out the input of the data of analog parameter, and blasting explosive granules compacting model model processing modules process obtained preserves, described raw data comprises blasting explosive granules quantity, blasting explosive granules thickness and mechanical property thereof.

The analog parameter that data processing module is obtained by described model processing modules carries out modeling computing, obtains blasting explosive granules compacting model; Comprise blasting explosive granules be approximately spheroidal particle after coordinate point computing, particle diameter length computing and rigid pressurized face and mould coordinate computation three sub-modules.

Described script file generation module suppresses model generation scripted code according to blasting explosive granules, and exports, and comprises model framework output, the output of mechanical property assignment, final condition and initialize and exports three sub-modules.

Advantage and the useful effect of the present invention are as follows:

Useful effect: owing to have employed such scheme, according to PBX explosive Photomicrograph, obtain real PBX explosive microscopical structure, analog parameter data are inputted by data processing module, carrying out modeling process by model processing modules, the analog parameter in conjunction with the input of user in data processing module obtains computation model; Modeling result is converted into numerical simulation software script language code by script file generation module, exports as script file, thus realizes PBX blasting explosive granules compression moulding numerical simulation automation modeling. Analyze the mechanism that model is carried out automation modeling, build the automation modeling method suppressing model based on explosive, there is the input of model data, output, automatization calculate, derive there is inner logicality can suppress in numerical simulation software the functions such as execution script file at blasting explosive granules, thus realize PBX blasting explosive granules suppress model quick, accurately set up. Blasting explosive granules compacting numerical simulation automation modeling method, by the task in modeling process and step being segmented, by good user interface, can make modeling work be easy to left-hand seat;According to true explosive microscopical structure, utilize the algorithm that spheroidal particle is approximate, automatically calculate the computation model desired datas such as the coordinate of PBX blasting explosive granules and particle diameter; Finally complete numerical simulation software language to export, and preservation is the script file that can be performed. Therefore, explosive compacting numerical simulation automation modeling method can be saved a large amount of modeling workload, be increased work efficiency, and also improves the accuracy rate of Models computed simultaneously.

Advantage: blasting explosive granules compacting numerical simulation automation modeling method is mainly the modeling of PBX explosive compression moulding numerical simulation and designs, compared to other automation modeling methods, the demand of PBX compression moulding simulation can have been better met, the transplanting of platform is better, it is possible to make it still can normally run when leaving Java operating environment. And in modeling method, relative to the stochastic distribution modeling method of relatively conventional blasting explosive granules size and position in compacting numerical simulation, the model that automation modeling method is set up is closer to actual PBX explosive microscopical structure. Input analog parameter by interface and automatically calculate the coordinate of PBX blasting explosive granules and the method for particle diameter, a large amount of work in blasting explosive granules compacting simulation model process of establishing are completed by corresponding module, the difficulty of modeling be can greatly simplify, accuracy and the speed of modeling improved simultaneously.

Good user interface makes modeling work be easy to left-hand seat; Automatically complete numerical simulation software language to export, and preservation is the script file that can be called; Modeling working efficiency and Models computed accuracy rate can be improved.

Accompanying drawing explanation

Fig. 1 is PBX blasting explosive granules compression moulding numerical simulation automation modeling method flow diagram;

Fig. 2 is the function structure chart of PBX blasting explosive granules compression moulding numerical simulation automation modeling method;

Comparison diagram before and after Fig. 3 PBX of the present invention spherical approximate method of blasting explosive granules models applying particle;

Fig. 4 obtains PBX particle compacting computation model concrete steps schema.

Embodiment

Below in conjunction with accompanying drawing, one embodiment of the present of invention is further described:

Embodiment 1: such as Fig. 2, explosive compression moulding numerical simulation automation modeling method is by segmenting modeling task, and specifically arrives module, calls disparate modules according to the step of modeling, it is achieved the automatization of explosive compression moulding model is set up; Comprise three modules, it is respectively: module one, data processing module; Module two, model processing modules; And module three, script file generation module.

Module one, data processing module has user interface, software interface, data preserve three sub-modules, carries out the input of the data of analog parameter and the preservation work of model result, and provides the user interface being easy to operation.

Module two, model processing modules have blasting explosive granules spheroidal particle approximate after coordinate point computing, particle diameter length computing and rigid pressurized face and mould coordinate computation three sub-modules, the raw data of user's input is carried out modeling process, obtains modeling result.

Module three, script file generation module has model framework output, the output of mechanical property assignment, final condition and initialize and exports three sub-modules, modeling result is converted into blasting explosive granules compression moulding numerical simulation software can execution script language codes, and export be file.

Concrete grammar step is as follows:

Step one, according to PBX explosive Photomicrograph, obtains real PBX explosive microscopical structure, inputs the required raw data of simulation by module one, and described raw data comprises blasting explosive granules quantity, thickness and mechanical property thereof;

Step 2, carries out modeling process by step one gained raw data by module two, obtains blasting explosive granules model, and described blasting explosive granules compacting model comprises explosive computation model and explosive mechanical model;

Step 3, is preserved step 2 gained blasting explosive granules model by module one;

Step 4, is changed step 2 gained blasting explosive granules model by module three, obtains numerical simulation software script language code; Numerical simulation software script language code refers to the command driven language in the numerical simulation software used, the working instructions that can lead to numerical simulation software used obtain this simulation software script language code, same blasting explosive granules model is adopt different script language code to represent in different numerical simulation softwares. The script language setting up module in the same numerical simulation software NairnMPM and numerical simulation software Uintah adopting material point method is just different.

Step 5, is exported step 4 gained script language code as file by module three.

Blasting explosive granules computation model described in described step 2, comprises blasting explosive granules central coordinate of circle under rectangular coordinate system, particle diameter length, rigid pressurized face and mould coordinate computation.

Blasting explosive granules mechanical model described in described step 2, comprises following three class data:

The material model selection of A blasting explosive granules, modulus of volume expansion, shearing modulus, Poisson's ratio, density, frictional coefficient, force-at-yield.

The material model of B rigid pressurized face and mould is selected and pressurized plane direction of motion and original speed.

The boundary bit shifting state allowed in the stress value of model boundary and numerical simulation process under C original state.

File described in described step 5 is that Computer Numerical Simulation software can execution script file.

According to above-mentioned method, concrete steps are as follows:

Explosive pharmaceutical engineering adopts various numerical simulation software (such as material point method software NairnMPM) explosive is suppressed model and carry out numerical simulation. But numerical simulation software needs when manually building blasting explosive granules model to do work complicated in a large number, as to the manual calculations of blasting explosive granules thickness, coordinate, character, initial stress, border stress etc. and assignment, wasted time and energy, very easily make mistakes. JavaSwing be a kind of can cross-platform visual, towards the exploitation language of object, can by code and data integration to, in an independent object, a large amount of work be completed by corresponding object in its programing system.

Adopting PBX blasting explosive granules compacting numerical simulation automation modeling method, based on JavaSwing exploitation, the Constructed wetlands of each module is as follows:

(1) data processing module: the controls such as label, text box, check box, order button can be made full use of in JavaSwing, make inputting interface clear, reduce the workload that user inputs raw data, and avoid various mal-operation, suppress correctly resolving of computation model for PBX blasting explosive granules and data basis is provided. After user inputs analog parameter, data can be preserved by data processing module automatically, and provides interface to provide model parameter to model processing modules.

(2) Material Definitions such as blasting explosive granules are custom variable group Material by model processing modules: in JavaSwing, and position is defined as custom variable group Body, and using required various types of analog parameter as its dissimilar attribute value. After typing raw data, first data are assigned to corresponding mechanical property set of variables attribute by program, obtain explosive mechanical model.The coordinate point computing of the approximate algorithm of blasting explosive granules spheroidal particle and particle diameter computing thinking are first by real explosive Photomicrograph, obtain real PBX explosive microscopical structure figure. Again explosive microscopical structure figure being carried out image gray proces, being used for the explosive microscopical structure figure of process is RGB color image, using the gray-scale value of coloured image R, G, B tri-component maximum values as gray-scale map picture:

F (i, j)=max (R (i, j), G (i, j), B (i, j))

Wherein f (i, j) represents the gray-scale value of gray-scale map picture at (i, j) place, R (i, j), G (i, j), and B (i, j) represents that image is at (i, j) place R, G, B tri-points of values respectively. The gray-scale map picture obtained is carried out binary conversion treatment, completes the preprocessing process of image.

Then utilize Sobel algorithm to be extracted at the edge of PBX explosive two value object, among the edge extracted, find complete closure space. Sobel edge edge detection algorithm (Sobeledgedelectionoperator) uses the discrete difference between the row of 3 �� 3 neighborhoods and row to complete the calculating of pixel gradient. In order to smooth effect can be provided, first carry out weighted mean, then carry out differential computing. Calculation expression is as follows:

$\mathrm{\Δ}f={\[g_x^2+g_y^2\]}^{1/2}={\{{\[(z_7+2z_8+z_9)-(z_1+2z_2+z_3)\]}^2+{\[(z_3+2z_6+z_9)-(z_1+2z_4+z_7)\]}^2\}}^{1/2}$

Wherein g_xAnd g_yRepresenting through the image intensity value of transverse direction and longitudinal edge detection, z represents the gray-scale value in image domains. Finally ask for maximum inscribed circle in closed region, pixel in closed region and the maximum pixel of the pixel distance value on the profile of image border are exactly the center of circle of maximum inscribed circle, the maximum inscribed circle part that each closed region has been obtained by the method for recycling Iamge Segmentation is removed, form new closed region, continue to utilize the approximate algorithm of blasting explosive granules spheroidal particle to continue to ask for maximum inscribed circle at new enclosed space, until the enclosed space obtained is less than threshold; Then successively the central coordinate of circle point of the inscribed circle of record and radius are obtained, as Fig. 3 explosive particle applies contrast before and after spherical approximate method. And then by definition rigid pressurized face and mould coordinate point, draw PBX particle compacting computation model, and obtaining PBX particle compacting computation model, concrete steps are such as Fig. 4.

(3) script file generation module: the method utilizing the File class API in Java to provide is opened, newly-built or writing in files. The file output of NairnMPM software scripts is divided into file head, trunk, file tail three parts. File head is the statement of script file form, coding statement and parameter; Trunk portion is the parameter definition needed for simulation, such as simulation time, simulation lattice dividing data, the definition of PBX blasting explosive granules mechanical property and position distribution data; File tail is end of file label.

Therefore, this automation modeling method, visual parameters input interface solves that man-machine interface in artificial modeling process is unfriendly, complicated operation, cannot parameter change in time, and the problem that parameter cannot be verified; The real blasting explosive granules Photomicrograph submitted to by visualization interface, can calculate positional information and the shape information of blasting explosive granules, it is to increase the accuracy of modeling and speed, substantially reduce simulation error automatically; Script file can be performed automatically set up and preserve, save work complicated in a large number and order input. These functions make simulation be more prone to left-hand seat above, it is possible to greatly simplify the difficulty of modeling, improve accuracy and the speed of modeling simultaneously, thus reach the object of automation modeling.

Claims (5)

1. a PBX blasting explosive granules compression moulding numerical simulation automation modeling method, it is characterised in that: comprise the following steps:

Step one, according to PBX explosive Photomicrograph, obtains real PBX explosive microscopical structure, obtains raw data, and as analog parameter input, described raw data comprises blasting explosive granules quantity, blasting explosive granules thickness and mechanical property thereof;

Step 2, carries out modeling process by step one gained raw data, obtains blasting explosive granules compacting model, and described blasting explosive granules compacting model comprises blasting explosive granules computation model and blasting explosive granules mechanical model;

Step 3, preserves step 2 gained blasting explosive granules compacting model;

Step 4, suppresses model generation numerical simulation software language scripts code according to step 2 gained blasting explosive granules, and generates output file.

2. a kind of PBX blasting explosive granules compression moulding numerical simulation automation modeling method according to claim 1, it is characterized in that: blasting explosive granules computation model described in step 2, comprise blasting explosive granules central coordinate of circle under rectangular coordinate system, particle diameter length, rigid pressurized face and mould coordinate computation.

3. a kind of PBX blasting explosive granules compression moulding numerical simulation automation modeling method according to claim 1, it is characterised in that: blasting explosive granules mechanical model described in step 2, comprises following three class data:

The material model selection of A blasting explosive granules, modulus of volume expansion, shearing modulus, Poisson's ratio, density, frictional coefficient, force-at-yield;

The material model of B rigid pressurized face and mould is selected and pressurized plane direction of motion and original speed;

The boundary bit shifting state allowed in the stress value of model boundary and numerical simulation process under C original state.

4. a kind of PBX blasting explosive granules compression moulding numerical simulation automation modeling method according to claim 1, it is characterised in that: file described in step 5 is that numerical simulation software can execution script language file.

5. a PBX blasting explosive granules compression moulding numerical simulation automation modeling system, it is characterised in that: comprise data processing module, model processing modules and script file generation module; Wherein

Described data processing module is according to PBX explosive Photomicrograph, obtain real PBX explosive microscopical structure, obtain raw data as analog parameter, carry out the input of the data of analog parameter, and blasting explosive granules compacting model model processing modules process obtained preserves, described raw data comprises blasting explosive granules quantity, blasting explosive granules thickness and mechanical property thereof;

The analog parameter that data processing module is obtained by described model processing modules carries out modeling computing, obtains blasting explosive granules compacting model; Comprise blasting explosive granules be approximately spheroidal particle after coordinate point computing, particle diameter length computing and rigid pressurized face and mould coordinate computation three sub-modules;

Described script file generation module suppresses model generation scripted code according to blasting explosive granules, and exports, and comprises model framework output, the output of mechanical property assignment, final condition and initialize and exports three sub-modules.