CN113203327A - Human body equivalent simulation target manufacturing method for explosive multi-physics field damage effect evaluation - Google Patents
Human body equivalent simulation target manufacturing method for explosive multi-physics field damage effect evaluation Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B35/00—Testing or checking of ammunition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract
The invention provides a method for manufacturing a human equivalent simulation target for evaluating the damage effect of multiple physical fields of explosion. The target manufactured by the method is a human equivalent simulation target with organs, and is provided with a human body model with internal skeletons, internal tissues and organs which are closer to the real structural geometric dimension and material dynamic response, so that the human equivalent model which is suitable for being arranged in an explosive multi-physical-field load action area and can directly reflect the damage characteristics of different explosive hazardous elements is formed; the system can complete research systems in the aspects of explosion hazard evaluation, personnel lethality or collateral damage mechanism, explosion prevention/elimination equipment protection performance evaluation and the like in the public safety field, and systematically assess the load biological damage characteristics of the explosion multi-physical field and the protection performance of the explosion prevention equipment.
Description
Technical Field
The invention relates to a method for manufacturing a target, in particular to a method for manufacturing a human equivalent target for evaluating the injury effect of human organs under the action of explosive multi-physical-field loads.
Background
Explosive multi-physics fields are usually accompanied by load effects such as shock waves, fragments, mechanical work and the like, and can cause damage effects such as impact injury, fragment injury, throwing injury and the like on human targets. In military countermeasures, personnel, as an important component of the combat system, play a decisive role in the exertion of combat power and are also the most vulnerable factors in the overall system. For example, under the action of overpressure, negative pressure and dynamic pressure of the shock waves, pressure difference, implosion effect, rupture effect and the like are generated in the solid and hollow organs, so that internal organs of a human body are damaged; the high-speed fragment generated by explosion can cause the organism tissues to be blunt and rubbed or run through, and seriously damage the integrity of organism organ tissues, so that the organism tissues lose the original functions; the mechanical work effect can generate an inertia throwing effect, so that the human body is dropped and impacted, and the external injury of bones or soft tissue organs is directly caused.
According to the national military standard GJB3197-98 shell test method, the human body killing effect evaluation in China currently takes the penetrating capacity of fragments to a 25mm pinewood board as an evaluation standard, the standard is formulated based on the kinetic energy of a projectile, namely, the projectile can be effectively killed and killed to fighters as long as the projectile has enough kinetic energy, and most countries adopt 78 joules as a critical value at present, namely, the projectile has killing capacity when the kinetic energy is greater than or equal to 78 joules. However, the pine board has great difference with human tissue and organs, and the pine boards in different regions and different storage times have great difference in penetrating destruction performance. In addition, traditional living animals are used as human equivalent targets, such as SD rats, big-ear white rabbits, adult beagle dogs, goats, pigs, rhesus monkeys and the like, and although the traditional living animals have the characteristics of similar anatomical structure, equivalent mechanical properties, equivalent physiological functions, equivalent injury effect and the like, the individual tissue structure differences of different animals are prominent, so that the traditional living animals have circadian rhythm differences relative to human bodies (for example, the lung injury caused by shock waves is sheep close to the human body, and the fragment penetrability injury is pig, sheep or dog close to the human body). Meanwhile, the problems of limited test sample amount, difficult acquisition of anatomical observation and pathophysiological detection data and easy generation of international ethical problems in a large number of live animal tests exist.
The ballistic gelatin can better reflect the dynamic response of human muscle or other viscoelastic body tissues when the fragments are impacted at high speed, but the composite injury effect of shock waves and mechanical work load action on human skeleton structures in explosive multi-physics fields is often ignored, and the ballistic gelatin can only be stored in an environment of 4-10 ℃, so the test applicability under the real environment temperature is poor. The Hybird dummy model applied to the field of automobile collision can completely reflect the mechanical characteristics of a human body target after severe impact on the aspects of balance weight, mass distribution, different sensor interfaces and the like, but cannot be directly arranged in an explosive multi-physical-field load area due to high cost, particularly cannot be hit by secondary projectiles such as fragments and the like so as to avoid unnecessary damage, and the limited test sample size of the Hybird dummy model cannot reflect the explosive damage effect rules of a plurality of test points at different explosion distances.
Disclosure of Invention
In view of the above, the invention provides a method for manufacturing a human equivalent simulation target for evaluating the damage effect of multiple physical fields of explosion, and the target manufactured by the method can directly reflect the damage characteristics of different explosion hazard elements when arranged in an explosion multi-physical-field load acting area.
The technical scheme of the invention is as follows: a human body equivalent simulation target manufacturing method for explosive multi-physics field damage effect evaluation comprises the following specific steps:
the method comprises the following steps: establishing a solid geometric model of the human equivalent simulation target:
step two: functional area block division:
dividing a functional region of a human body into a fatal damaged organ and a non-fatal damaged organ; the fatally damaged organ includes: head, lung, heart; the non-fatal damaged organ includes: sternum, legs and feet;
step three: respectively manufacturing equivalent models of the lethal damaged organ and the non-lethal damaged organ in the step two according to the solid geometric model of the human equivalent simulation target established in the step one;
31: head equivalent model making:
the head is of a bone-in-meat structure and comprises an external hard skull and an internal brain tissue; based on this, the head equivalent model manufacturing comprises skull model 3D printing and brain tissue glue injection: firstly, 3D printing a skull model according to the structural size of a human skull in the solid geometric model established in the step one, wherein the skull model is hollow inside; then injecting a silica gel diluent for equivalent brain tissue into the skull model, and obtaining a head equivalent model after the silica gel is solidified;
32: making equivalent models of lung and heart organs:
the lung and the heart are soft tissues without bone wrapping, and the manufacturing process of the equivalent model comprises the following steps: respectively 3D printing hard external contour models of the lung and the heart according to the structural sizes of the lung and the heart organs in the solid geometric model established in the step one to obtain a lung external mold and a heart external mold; then injecting prepared silica gel diluent for equivalent soft tissue from the gel injection ports on the lung external mold and the heart external mold respectively, and removing the lung external mold and the heart external mold after the silica gel is solidified, thereby obtaining a lung equivalent model and a heart organ equivalent model;
33: making an equivalent sternum model:
the sternum is a bone structure, and a solid spine and rib model is directly printed in a 3D mode according to the structural size of the spine and ribs in the solid geometric model established in the step one, so that a sternum equivalent model can be obtained;
34: making an equivalent leg and foot model:
the leg and foot is "meat package bone" structure, including musculature and inside skeleton, and based on this, leg and foot equivalent model preparation includes leg bone and toe bone 3D prints and musculature compound mould, specifically is:
firstly, 3D printing hard skeleton models of leg bones and toe bones according to the structural sizes of the leg bones and the toe bones in the three-dimensional geometric model established in the step one;
then 3D printing thin shell models of the legs and feet to obtain leg and foot external molds with glue injection openings reserved;
placing the hard skeleton models of the leg bones and the toe bones in the leg and foot outer molds by using a bracket; then injecting the prepared silica gel diluent for equivalent skin from the gel injection port of the leg and foot external mold, and removing the leg and foot external mold after the silica gel is cured, thereby obtaining a leg and foot equivalent model;
step four: dummy equivalent target assembly
And assembling the manufactured equivalent models of different parts of the human body to obtain the human body equivalent simulation target with organs.
As a preferred mode of the present invention, the head equivalent model further includes a scalp silica gel for equivalent scalp; the scalp silica gel is prepared by the following steps:
firstly, 3D printing a thin-shell model of the scalp, wherein the thin-shell model of the scalp comprises an outer die and an inner die, and the outer die and the inner die are both subjected to hollow printing; a glue injection port is reserved on the outer mold; then injecting a silica gel diluent for equivalent skin between the outer mold and the inner mold through the glue injection port; after the silica gel is solidified, removing the outer mold and the inner mold to obtain scalp silica gel;
when the head equivalent model is manufactured, the manufactured scalp silica gel is assembled outside the skull model injected with the silica gel brain tissue.
As a preferred mode of the invention, the dummy equivalent target further comprises trunk skin silica gel for equivalent trunk skin; the preparation steps of the trunk skin silica gel are as follows:
firstly, 3D printing a thin-shell model of trunk skin, wherein the thin-shell model of the trunk skin comprises an outer mold and an inner mold, and both the outer mold and the inner mold adopt hollow printing; a glue injection port is reserved on the outer mold; then injecting a silica gel diluent for equivalent skin between the outer mold and the inner mold through the glue injection port; after the silica gel is solidified, removing the outer mold and the inner mold to obtain the trunk skin silica gel;
when the dummy equivalent target assembly is carried out, the trunk skin silica gel is assembled outside the sternum equivalent model.
As a preferred mode of the present invention, in the process of making the leg-foot equivalent model, the thin-shell model of the leg-foot is of a two-petal type, that is, the outer contours of the two petals of the leg-foot are respectively 3D printed, and the outer contours of the two petals of the leg-foot are closed to form the thin-shell model of the leg-foot.
As a preferred mode of the invention, according to the evaluation requirements of different organ damage effects of the human body loaded by explosive multi-physical field, the dummy equivalent target is subjected to structure expansion, and then equivalent models of other organs of the human body are manufactured.
As a preferred mode of the present invention, the range of the blending ratio of the silica gel diluent for equivalent brain tissue in the head equivalent model is: silica gel: the diluent is 1000: 5-1000: 1.
As a preferred mode of the present invention, the dispensing ratio range of the silica gel diluent for equivalent soft tissue in the equivalent models of the lung and the heart is: silica gel: the diluent is 1000: 5-1000: 1.
As a preferred mode of the present invention, the blending ratio range of the silica gel diluent for equivalent skin in the leg and foot equivalent model is: silica gel: the diluent is 1000: 5-1000: 1.
As a preferred mode of the invention, when the damage effect evaluation of explosive multi-physical-field load is carried out, more than two dummy equivalent targets are arranged at different distances from a detonation center, and the damage effect of different organ structures of the dummy equivalent targets under the conditions of explosive multi-physical-field shock waves, fragments and mechanical work load is analyzed.
Has the advantages that:
(1) the target manufactured by the method is a human equivalent simulation target with organs, and is provided with a human body model with internal skeletons, internal tissues and organs which are closer to the real structural geometric dimension and material dynamic response, so that the human equivalent model which is suitable for being arranged in an explosive multi-physical-field load action area and can directly reflect the damage characteristics of different explosive hazardous elements is formed; the system can complete research systems in the aspects of explosion hazard evaluation, personnel lethality or collateral damage mechanism, explosion prevention/elimination equipment protection performance evaluation and the like in the public safety field, and systematically assess the load biological damage characteristics of the explosion multi-physical field and the protection performance of the explosion prevention equipment.
(2) The target manufactured by the method is low in manufacturing cost (compared with a dummy in the field of automobile collision, such as a mixed III-50 dummy with high cost in the field of automobile collision), and is suitable for evaluating the human body damage effect at a plurality of measuring points from a near field to a far field at different explosion action distances.
(3) In the field of traditional automobile collision, the mixed III-50 dummy can be irreversibly damaged after being hit by a fragment, and the damage degree of the incoming fragment to the dummy cannot be judged; the dummy equivalent target manufactured by the method can completely reflect the trajectory and penetration depth of fragments in silica gel, so that the degree of the damage level of the human body can be reversely deduced.
Drawings
FIG. 1 is a flow chart of the method of targeting;
FIG. 2 is a schematic diagram of an equivalent head model;
FIGS. 3 and 4 are schematic diagrams of equivalent models of the lungs and heart, respectively;
fig. 5 is a schematic diagram of a chest equivalent model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following detailed description and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
the embodiment provides a method for manufacturing a human equivalent simulation target for evaluating the damage effect of multiple physical fields in explosion.
As shown in fig. 1, the specific steps for making the target are:
the method comprises the following steps: establishing a solid geometric model of the target:
according to the national standard of human body size of Chinese adults and the statistical average value of human body parameters of Chinese soldiers, the determined original human body model parameters are as follows: male, 35 years old, 170cm high and 65Kg weight; and establishing a solid geometric model of the original human body model through 3dmax software according to the original human body model.
Step two: functional area block division:
dividing functional area blocks with disabling effectiveness according to significance (fatal and non-fatal) of damage effect difference caused by the same damage factor; in this example, a two-stage division system is used to divide the functional area blocks, i.e., the functional areas of the human body are divided into two categories:
(1) head, lung and heart organs which are mainly fatal injury organs of a human body and are easy to be damaged by shock waves and fragments in a combined manner; based on the above, an equivalent model of the head, the lung and the heart organ needs to be established;
(2) the non-fatal injury organs of the human body are taken as assistance to supplement sternum and leg organs with large explosive exposure area which affect the motion efficiency of the human body; based on the method, an equivalent model of the sternum, the legs and the feet is required to be established;
step three: making an equivalent model of each part of organ tissues:
31: head equivalent model making:
the head is the structure of "bone package meat", includes outside stereoplasm skull and inside brain tissue promptly, and based on this, the head equivalent model preparation includes steps such as skull 3D printing and brain tissue injecting glue, specifically does:
311: modeling: repairing the human skull in the solid geometric model established in the step one by using 3dmax software (the solid geometric model of the original human model is a surface model formed by scanning a large number of triangular patches by using medical software such as mics, and the like, and because certain organ intersection parts or sunken parts are easy to miss scanning or unclear in profile recognition in the scanning process, the original model has defects, if the three-dimensional geometric model is directly introduced into 3D printing equipment, the printed model also has a cave, so that the solid geometric model needs to be repaired for the second time by using the 3dmax software and is exported (if a format is selected, STL is exported) so as to carry out 3D printing;
312: 3D printing of a prototype: introducing the STL file led out in the step 311 into a 3D printing upper computer, printing a skull model by using photosensitive resin C-UV9400ABS modeling resin, printing a hollow part in the skull, and then polishing the printed skull model;
313: injecting silica gel into the interior of the skull: injecting pre-prepared silica gel (the ratio of the silica gel to the diluent is 1000: 1) with the hardness similar to that of human brain tissues into the 3D-printed skull; then, the mixture was left standing at room temperature for 48 hours to solidify the silica gel, thereby obtaining a head equivalent model as shown in FIG. 2; and finally, grinding the skull surface details, and checking whether the obtained head equivalent model details are consistent with the head size in the solid geometric model established in the step one (the size error is in a set range).
32: making equivalent models of lung and heart organs:
the lung and the heart are soft tissues without bone wrapping, and the manufacturing idea of an equivalent model is as follows: firstly, printing a hard external outline model, namely an outer membrane, through 3D; reserving a glue injection port on the outer membrane, and then injecting the prepared silica gel; and finally, removing the hard outer die. Based on the method, the manufacturing steps of the equivalent model of the lung and the heart organ are as follows:
321: modeling: repairing the human lung and heart structures in the solid geometric model established in the step one by using 3dmax software, and exporting (such as exporting by using format. STL) so as to carry out 3D printing;
322: 3D printing of a prototype: introducing the STL file led out in the step 321 into a 3D printing upper computer, respectively printing thin shell models of the lung and the heart by using photosensitive resin C-UV9400ABS modeling resin, respectively adopting hollow printing, and reserving glue injection ports; then polishing thin shell models of the lung and the heart to obtain hard outer molds of the lung and the heart;
323: and (3) secondary die forming: coating a release agent on the inner surface of the outer film prepared in the step 322 so as to facilitate subsequent demolding; then, pre-prepared silica gel (the silica gel: the diluent is 1000: 1) with the hardness similar to that of the lung and the heart of a human body is respectively injected into the outer molds of the 3D-printed lung and the heart; then standing the outer mold for 48 hours at room temperature (the temperature is controlled to be 10-30 ℃) to solidify the silica gel, and finally removing the hard outer mold (namely demolding), thereby obtaining equivalent models of organs of the lung and the heart, as shown in fig. 3 and 4;
and finally, polishing the surface details of the lung equivalent model and the heart equivalent model, and checking whether the obtained details of the lung equivalent model and the heart equivalent model are consistent with the sizes of the lung and the heart in the solid geometric model established in the step one (the size error is in a set range).
33: making an equivalent sternum model:
the sternum is a structure only provided with bones, so the sternum equivalent model manufacturing comprises the steps of spine and rib 3D printing and the like, and specifically comprises the following steps:
331: modeling: repairing the human spine and rib bones in the solid geometric model established in the step one by using 3dmax software, and exporting (such as exporting by using format) STL so as to carry out 3D printing;
332: 3D printing of a prototype: the STL file derived in step 331 is imported into a 3D printing host computer, the spine and rib models are printed with photosensitive resin C-UV9400ABS molding resin, and the spine and rib bones are printed solid, thereby obtaining the equivalent sternum model, as shown in fig. 5.
34: making an equivalent leg and foot model:
the leg and foot are in a structure of 'meat-coated bones', namely, the leg and foot equivalent model comprises the steps of 3D printing of leg bones and toe bones, muscle tissue replica molding and the like, and the method specifically comprises the following steps:
341: modeling: repairing the leg bone and toe bone model in the solid geometric model established in the step one by adopting 3dmax software, and deriving the shapes of the leg bone and the toe bone by adopting an STL format;
342: 3D printing of a prototype: importing the STL file exported in the step 341 into a 3D printing upper computer, and printing leg bones and toe bones by using photosensitive resin C-UV9400ABS to obtain hard bone models of the leg bones and the toe bones;
343: manufacturing leg and foot external molds:
repairing the leg and foot model in the solid geometric model established in the step one by adopting 3dmax software, and deriving the leg and foot shape by adopting an STL format; then, printing a thin shell model of the leg and foot by using photosensitive resin C-UV9400ABS through 3D printing, wherein the thin shell model of the leg and foot is in a two-petal type, namely respectively printing the external contour of the leg and foot in two petals in a 3D manner; after the external contours of the two legs are closed, a thin shell model of the legs is formed, and a hard outer mold of the legs is obtained; glue injection openings are reserved on the hard outer molds of the legs and the feet;
344: and (3) secondary die forming: coating a release agent on the inner surface of the hard outer mold of the leg and the foot so as to facilitate subsequent demolding; correspondingly placing the hard skeleton models of the leg bones and the toe bones printed in the step 342 in proper positions inside the leg and foot external molds by using a bracket; then, pre-prepared silica gel (the silica gel: the diluent is 1000: 1) with the hardness similar to the skin of a human body is injected into the leg and foot external mold; then putting the leg and foot outer molds into a double molding machine for vacuum air pumping; then standing for 48 hours under the condition of room temperature (the temperature is controlled to be 10-30 ℃) to solidify the silica gel, and finally removing the hard outer die (namely demoulding), thereby obtaining the leg and foot equivalent model.
Step four: dummy equivalent target assembly
Assembling different parts of the manufactured human body, thereby obtaining the human body equivalent simulation target with organs.
When the explosive multi-physical field load damage effect evaluation is carried out, a plurality of dummy equivalent targets are arranged at different distances from a detonation core, the damage effects of different organ structures under the conditions of explosive multi-physical field shock waves, fragments and mechanical work loads are analyzed, the relation of the influence of different organ tissue damage degrees on the human body incapacity level is determined, and the human body incapacity evaluation method is mapped according to the known explosive multi-physical field load killing action parameters.
Example 2:
on the basis of the embodiment 1, according to the evaluation requirements of different organ damage effects of the explosive multi-physical field load human body, the structure and the functionality of the dummy equivalent target are expanded; in other words, in addition to the preparation of the above-mentioned organ tissues, other tissue structures such as liver, stomach, pancreas, spleen, diaphragm, kidney, epidermis, dermis and subcutaneous fat, arm, finger bone, clavicle, scapula, sternum, costal cartilage, intervertebral disc, other muscle tissues, and the like can be prepared by the same preparation process, so that different organ tissue structures in the human body can be clearly and intuitively reflected. During the preparation, the preparation of the corresponding organ tissue is carried out by adopting the same preparation process as that in the embodiment 1 according to the structure types of the organ tissue, such as a bone-in-meat structure, a pure bone, a bone-in-meat structure, a bone-free structure and the like; pure bone tissues such as finger bones, clavicles, scapulae, sternum and intervertebral discs are directly printed in a 3D (the manufacturing method is the manufacturing step of the equivalent sternum model); the arm is in a meat bone structure, and the manufacturing method comprises the manufacturing steps of the leg and foot equivalent model; the liver, the stomach, the pancreas, the spleen, the diaphragm, the kidney and the like are skeleton-free structures, and the manufacturing method comprises the manufacturing steps of the lung and heart equivalent model;
example 3:
on the basis of the above embodiment 1 and embodiment 2, a scalp silica gel and a trunk skin silica gel are further added, the scalp silica gel and the trunk skin silica gel have a skeleton-free structure, and the scalp silica gel is prepared as an example, and the preparation steps are as follows:
firstly, repairing the human skull in the solid geometric model established in the step one by using 3dmax software, and then printing a thin-shell model of the scalp by using photosensitive resin C-UV9400ABS modeling resin through a 3D printer, wherein the thin-shell model of the scalp comprises an outer die and an inner die which are both printed in a hollow way; a glue injection port is reserved on the outer mold; then injecting pre-prepared silica gel with the hardness similar to that of human skin between the outer mold and the inner mold through the glue injection port; then standing the outer mold and the inner mold for 48 hours at room temperature (the temperature is controlled to be 10-30 ℃) to solidify the silica gel, and finally removing the hard outer mold and the hard inner mold (namely demolding), thereby obtaining the scalp silica gel;
when the head equivalent model is manufactured, the manufactured scalp silica gel is further assembled on the skull model injected with the silica gel brain tissue;
when the dummy equivalent target is assembled, the trunk skin silica gel is assembled outside the sternum equivalent model.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. The human body equivalent simulation target manufacturing method for the explosive multi-physics field damage effect evaluation is characterized by comprising the following steps of:
the method comprises the following steps: establishing a solid geometric model of the human equivalent simulation target:
step two: functional area block division:
dividing a functional region of a human body into a fatal damaged organ and a non-fatal damaged organ; the fatally damaged organ includes: head, lung, heart; the non-fatal damaged organ includes: sternum, legs and feet;
step three: respectively manufacturing equivalent models of the lethal damaged organ and the non-lethal damaged organ in the step two according to the solid geometric model of the human equivalent simulation target established in the step one;
31: head equivalent model making:
the head is of a bone-in-meat structure and comprises an external hard skull and an internal brain tissue; based on this, the head equivalent model manufacturing comprises skull model 3D printing and brain tissue glue injection: firstly, 3D printing a skull model according to the structural size of a human skull in the solid geometric model established in the step one, wherein the skull model is hollow inside; then injecting a silica gel diluent for equivalent brain tissue into the skull model, and obtaining a head equivalent model after the silica gel is solidified;
32: making equivalent models of lung and heart organs:
the lung and the heart are soft tissues without bone wrapping, and the manufacturing process of the equivalent model comprises the following steps: respectively 3D printing hard external contour models of the lung and the heart according to the structural sizes of the lung and the heart organs in the solid geometric model established in the step one to obtain a lung external mold and a heart external mold; then injecting prepared silica gel diluent for equivalent soft tissue from the gel injection ports on the lung external mold and the heart external mold respectively, and removing the lung external mold and the heart external mold after the silica gel is solidified, thereby obtaining a lung equivalent model and a heart organ equivalent model;
33: making an equivalent sternum model:
the sternum is a bone structure, and a solid spine and rib model is directly printed in a 3D mode according to the structural size of the spine and ribs in the solid geometric model established in the step one, so that a sternum equivalent model can be obtained;
34: making an equivalent leg and foot model:
the leg and foot is "meat package bone" structure, including musculature and inside skeleton, and based on this, leg and foot equivalent model preparation includes leg bone and toe bone 3D prints and musculature compound mould, specifically is:
firstly, 3D printing hard skeleton models of leg bones and toe bones according to the structural sizes of the leg bones and the toe bones in the three-dimensional geometric model established in the step one;
then 3D printing thin shell models of the legs and feet to obtain leg and foot external molds with glue injection openings reserved;
placing the hard skeleton models of the leg bones and the toe bones in the leg and foot outer molds by using a bracket; then injecting the prepared silica gel diluent for equivalent skin from the gel injection port of the leg and foot external mold, and removing the leg and foot external mold after the silica gel is cured, thereby obtaining a leg and foot equivalent model;
step four: dummy equivalent target assembly
And assembling the manufactured equivalent models of different parts of the human body to obtain the human body equivalent simulation target with organs.
2. The method for human equivalent simulation target creation for explosive multiphysics injury effect assessment according to claim 1, wherein the head equivalent model further comprises scalp silicone for equivalent scalp;
the scalp silica gel is prepared by the following steps:
firstly, 3D printing a thin-shell model of the scalp, wherein the thin-shell model of the scalp comprises an outer die and an inner die, and the outer die and the inner die are both subjected to hollow printing; a glue injection port is reserved on the outer mold; then injecting a silica gel diluent for equivalent skin between the outer mold and the inner mold through the glue injection port; after the silica gel is solidified, removing the outer mold and the inner mold to obtain scalp silica gel;
when the head equivalent model is manufactured, the manufactured scalp silica gel is assembled outside the skull model injected with the silica gel brain tissue.
3. The method for human equivalent simulation target of claim 1, wherein the dummy equivalent target further comprises a trunk skin silica gel for equivalent trunk skin;
the preparation steps of the trunk skin silica gel are as follows:
firstly, 3D printing a thin-shell model of trunk skin, wherein the thin-shell model of the trunk skin comprises an outer mold and an inner mold, and both the outer mold and the inner mold adopt hollow printing; a glue injection port is reserved on the outer mold; then injecting a silica gel diluent for equivalent skin between the outer mold and the inner mold through the glue injection port; after the silica gel is solidified, removing the outer mold and the inner mold to obtain the trunk skin silica gel;
when the dummy equivalent target assembly is carried out, the trunk skin silica gel is assembled outside the sternum equivalent model.
4. The method for fabricating human equivalent simulation target for injury effect evaluation of explosive multiphysics according to claim 1, wherein in the process of fabricating the leg-foot equivalent model, the thin shell model of the leg-foot is in two-petal form, i.e. the external contours of the leg-foot are respectively 3D printed, and the external contours of the leg-foot are folded to form the thin shell model of the leg-foot.
5. The method as claimed in claim 1, wherein the dummy equivalent target is structurally expanded to make equivalent models of other organs of the human body according to the evaluation requirement of the injury effect of different organs of the human body loaded by the explosive multi-physical field.
6. The method for fabricating human equivalent simulation target for injury effect evaluation of explosive multiphysics according to any one of claims 1-5, wherein the dispensing ratio range of the silica gel diluent for equivalent brain tissue in the head equivalent model is: silica gel: the diluent is 1000: 5-1000: 1.
7. The method for human equivalent simulation target creation for the injury effect evaluation of explosive multiphysics according to any one of claims 1-5, wherein the dispensing ratio range of the silica gel diluent for equivalent soft tissue in the equivalent model of the lung and heart is: silica gel: the diluent is 1000: 5-1000: 1.
8. The method for making human equivalent simulation target for explosive multi-physics damage effect evaluation according to any one of claims 1-5, wherein the blending ratio of the silica gel diluent for equivalent skin in the leg and foot equivalent model is in the range of: silica gel: the diluent is 1000: 5-1000: 1.
9. The method for making human equivalent simulation target for the damage effect evaluation of explosive multi-physical field according to any one of claims 1 to 5, wherein when the damage effect evaluation of explosive multi-physical field load is performed, more than two dummy equivalent targets are arranged at different distances from the core of the detonation, and the damage effect of different organ structures of the dummy equivalent targets under the conditions of explosive multi-physical field shock wave, fragment and mechanical work load is analyzed.
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