45 results about "Impact dynamics" patented technology

The invention discloses a test device and method for simulating an ultra-high-speed penetration ground impact effect, and the device employs a static load loading system to apply a static load to the periphery of a sample so as to simulate a ground stress environment, and employs a dynamic load loading system to apply an impact dynamic load to the top of the sample so as to simulate ground impact. In the dynamic loading system, a phase change reaction kettle is used for heating liquid CO2 to a supercritical high-pressure state; the liquid filling module is used for filling liquid CO2 into the phase change reaction kettle; the gun barrel is used for receiving high-pressure gas released by the phase change reaction kettle and forming ground shock waves similar to a plane; the stress wave lens module is used for adjusting the width of shock waves through a stress wave lens combination and acting the shock waves on the sample; the control module can control the shock wave peak pressure by regulating the heating power of the phase change reaction kettle, and can control the duration time of shock waves by regulating the bore diameter of the gun barrel. According to the invention, controllable and high-fidelity simulation of the ultra-high-speed penetration impact effect is realized.

The application discloses a test device and method for simulating the impact effect of super-high-speed penetration into the ground, wherein a static load loading system is used to apply static load to the periphery of a sample to simulate the ground stress environment, and a dynamic load loading system is used to apply impact dynamic load to the top of the sample to simulate the ground impact, wherein in the dynamic load loading system, a phase change reaction kettle is used to heat liquid CO2 to a supercritical high-pressure state, a liquid charging module is used to charge the phase change reaction kettle with liquid CO2, a barrel is used to receive the high-pressure gas released by the phase change reaction kettle and form an approximately planar ground shock wave, a stress wave lens module is used to adjust the width of the ground shock wave through a stress wave lens combination and act on the sample, and a control module can control the peak pressure of the ground shock wave by regulating the heating power of the phase change reaction kettle and can control the duration of the ground shock wave by adjusting the aperture of the barrel. The application realizes controllable and high-fidelity simulation of the impact effect of super-high-speed penetration into the ground.

The invention provides a coal mine underground reservoir dam body anti-impact stability simulation test device and method.The device comprises a main body frame, a dam body model, dam body loading systems, an impact disturbance system, an impact energy monitoring system and a response measurement monitoring system, and the dam body loading systems are arranged on the upper portion and the two sides of the main body frame; the static load module is used for providing vertical static load force and transverse static load force for the dam body model; the impact disturbance system is arranged at the upper part of the main body frame and is used for applying a dynamic load force to a target position of the dam body model; the impact energy monitoring system is used for monitoring the impact speed and impact energy of the impact disturbance system; and the response measurement monitoring system is used for monitoring the response state of the dam body model when the dam body loading system and the impact disturbance system act. According to the method, the mechanical response characteristics and the deformation failure rule of the underground reservoir dam body under the impact load effect can be obtained, and the impact dynamic disaster breeding and causing mechanism of the underground reservoir dam body of the coal mine is disclosed.

The application relates to the field of impact dynamics tests, and particularly discloses an electronic instrument high-g-value impact characteristic test evaluation device and method. The device comprises an adapting section, a pulse shaper, and a base. The adapting section is coaxially connected with the tail of a high-speed gas gun launch tube to form a radially constrained loading channel and is movably connected with an impact mass. The pulse shaper is arranged in the adapting section. The base is slidably connected in the adapting section and located behind the pulse shaper, and is used for bearing the load transmitted by the impact mass when the impact mass hits the pulse shaper. The base has a front cavity and a rear cavity, and the rear cavity contains a measuring body. A diaphragm pressure gauge is arranged on the front end impact surface of the base, a base accelerometer is arranged in the front cavity, and a multi-parameter sensor is arranged in the measuring body. The device can accurately obtain an excitation load, realize distributed synchronous measurement of multiple physical quantities, has reliable signal line protection and kinetic energy absorption mechanism, and improves the accuracy and reliability of performance evaluation of electronic instruments and protective components of the electronic instruments under a high-g-value impact environment.

The utility model provides gun bore radial impact load experiment equipment, which relates to the technical field of impact dynamic model devices, and comprises a support frame, a pneumatic loading assembly, an acceleration conduit, an impact rod, an energy collection assembly and an impact pressure reverser, the pneumatic loading assembly is connected with the top of the support frame; the acceleration conduit is connected below the pneumatic loading assembly and is located in the support frame; the impact rod is connected into the acceleration guide pipe in a sliding manner; the energy collecting assembly is connected with the bottom of the supporting frame, the energy collecting assembly and the pneumatic loading assembly are oppositely arranged, and the upper portion of the energy collecting assembly makes contact with a test piece; the impact pressure reverser is connected with a blast hole formed in the test piece and is opposite to the bottom end of the impact rod. The utility model solves the problems in the prior art that the loading of radial impact load is difficult to realize and the equipment is easy to damage or the experimental data is inaccurate.

The invention discloses a high-overload gyroscope impact resistance design method based on a multi-section trial function energy method, and belongs to the technical field of micro electro mechanical system structure design. Comprising the following steps: constructing a physical model; establishing a trial function; calculating out-of-plane bending flexibility of the novel structural beam; introducing a torsion correction term and an outer frame equivalent flexibility; the flexibility is accumulated, and the reciprocal is taken to obtain the out-of-plane total rigidity; and the out-of-plane rigidity is applied to construction of an impact kinetic equation. A traditional Euler-Bernoulli beam theory cannot effectively consider the influence of rigidity coupling and torsional deformation of multiple sections of beams and the rigidity of an outer frame on the overall rigidity of a structure. According to the method, the out-of-plane equivalent stiffness of the novel structural beam and outer frame combined structure can be quickly estimated and obtained, the obtained stiffness parameter is applied to dynamic characteristic analysis of the gyroscope, and effective theoretical support is provided for design and engineering application of the novel structural beam structure of the high-overload gyroscope in the out-of-plane direction.

The present application relates to the technical field of geological disaster prevention engineering, and particularly relates to an adjustable buffer energy-absorbing structure of a rock retaining wall, which comprises an anchoring and guiding system, a buffer energy-absorbing assembly, a driving execution mechanism and a control unit. The present application combines the innovative adjustable inverted V-shaped buffer energy-absorbing assembly with the regulation and control strategy based on the impact dynamics model to construct an efficient, self-adaptive and easy-to-maintain dangerous rock prevention and enhancement system. Through the optimal angle adjustment verified quantitatively, the method realizes the maximum dissipation of impact energy and the active control of rockfall trajectory, improves the protection capability of the traditional rock retaining wall for the key structures behind, and has important engineering application value and popularization prospect.

The application belongs to the technical field of aviation structure impact dynamics, and is a kind of crash dynamics modeling method for simplifying fuselage frame section structure of an airplane. A fuselage frame section model is established by corresponding structural characteristics of the fuselage frame section, the position and deformation mode of a large deformation region in the fuselage frame section model are determined, the large deformation region is simulated into a plastic hinge, and torque and axial force performance parameters corresponding to the plastic hinge are determined. Different gravity fields and initial velocities are given to the fuselage frame section, and the response of the plastic hinge of the fuselage frame section structure at different deformation degrees is calculated. Based on the plastic large deformation principle, the advantages of simple connection relationship model, fast calculation efficiency and high calculation accuracy of the finite element method are fully combined, the calculation efficiency of the crash finite element analysis of the fuselage frame section of the airplane is improved, and potential calculation non-convergence problems in the calculation of the plastic large deformation region of the fuselage frame section structure of the airplane can be avoided, the design cycle of the airplane structure adaptability is shortened, and the application prospect is great.

A method for calculating the impact compression reaction characteristics of energetic structural materials (ESMs) is proposed. The method combines impact dynamics and chemical reaction kinetics, and takes into account the static pressure parameters of products and the microstructure of materials. A theoretical model of impact reaction is established, and the wave specific volume, impact temperature, and reaction temperature of materials are calculated and corrected. The correlation mechanism between the microstructure and macroscopic reaction behavior of ESMs under impact compression is established, which effectively improves the calculation accuracy of the impact compression reaction characteristics of ESMs.

This invention belongs to the field of barrel life research, specifically disclosing a microscale projectile-barrel impact behavior modeling method. This method includes identifying the atomic composition and atomic mass fraction of the projectile-barrel material; determining the potential energy trap depth and zero-potential-energy interatomic spacing of each component atom; determining the two-body potential energy function between atoms in the projectile-barrel material; establishing the polycrystalline structure of the projectile-barrel material; establishing a crystal model of the projectile-barrel material; and solving the microscale projectile-barrel impact behavior using the momentum mirror method. Compared with existing technologies, this invention establishes a model of the projectile-barrel impact behavior of the barrel material from a microscale modeling perspective, improves the two-body potential energy function between atoms in the projectile-barrel material, and links molecular dynamics and impact dynamics, laying the foundation for the study of the mechanism of plastic damage in the barrel bore.

This invention relates to the field of structural impact dynamics and numerical calculation technology, specifically disclosing a numerical prediction method for the nonlinear response of a variable cross-section beam under multi-point time-series strong impact. The method includes: S1, determining the parameters of the variable cross-section beam and establishing an equivalent multi-degree-of-freedom model; S2, determining the multiple loading conditions for the multi-point time-series strong impact; S3, calculating the stiffness changes of each element under large deformation effects; S4, calculating the initial plastic limit displacement difference at both ends of each element; S5, calculating the stiffness matrix affected by geometric nonlinearity at the current moment; S6, calculating the stiffness matrix affected by material nonlinearity at the current moment; S7, calculating the total internal force at the current moment; S8, calculating the acceleration at the current moment; and S9, calculating the velocity and displacement at the current moment. This invention achieves numerical prediction of the nonlinear response of a variable cross-section beam under multi-point time-series strong impact by establishing an equivalent multi-degree-of-freedom model, combining geometric and material nonlinearity to correct the stiffness matrix, and solving the equations of motion.

The utility model discloses a buffer vertical impact dynamic test large-scale platform, which comprises an upper installation platform, a lower installation platform, a plurality of guide columns, an impact module, a balancing weight, an electromagnet, a motor, a force sensor and a buffer displacement detection unit, the impact module is installed on the guide column in a sleeving mode, the balancing weight is fixedly installed above the impact module, the motor is fixedly installed on the upper installation platform, an output shaft of the motor is connected with the electromagnet through a transmission chain, the electromagnet is located over the balancing weight, and the force sensor is fixedly installed below the impact module. The buffer displacement detection unit is used for detecting the length change of the buffer. The buffer vertical impact dynamic test large-scale platform is reasonable in structure, and can carry out a buffer vertical impact dynamic test so as to obtain impact force data and buffer length change data.

The invention relates to the field of structural design and impact dynamic modulation of sports equipment and handheld impact tools, and discloses an inertia-elasticity coupling modulation assembly based on controlled micrometric displacement and a dynamic regulation and control method thereof. The assembly can be embedded into an internal cavity of sports equipment or a tool and comprises a mass block, an elastic body or an elastic element, a limiting structure and an optional guide structure. The mass block generates controlled micro-displacement relative to the main body structure due to the inertia effect when high-speed impact or impact operation occurs to equipment or tools, and the elastic body or the elastic element is driven to deform in a controlled range and generate elastic restoring force, so that transient dynamic response of the impact process is participated in a millisecond-level time scale, and the impact force is generated. And the time distribution, the energy transfer mode and the transient stability of the structure of the impact force are modulated. Through the inertia-elasticity coupling modulation mechanism, on the premise that the original geometric structure and macroscopic mass distribution of equipment or tools are not obviously changed, the force output consistency in the impact process can be improved, transient torsion and local deformation sudden change caused by eccentric impact are restrained, and the impact strength of the equipment or tools is improved. And the stability and the fault tolerance of the equipment or the tool under the impact working condition are improved. The assembly has various structural forms and adjustable parameters, is suitable for handheld impact tools such as tennis rackets, badminton rackets, squash rackets, baseball bat, golf clubs, hammers, axes and the like, and has good universality and industrial application prospects.

The utility model discloses a two-dimensional SHPB test device, and belongs to the field of material impact dynamics tests. Comprising two incident rods, two transmission rods and a two-dimensional loading mechanism, and the incident rods and the transmission rods are uniformly divided into two groups and are symmetrically arranged on two sides of a test sample; the incident bar and the transmission bar in each group are coaxial and are oppositely arranged on two sides of a test sample; each incident bar is provided with a first end and a second end, the two-dimensional loading mechanism is provided with two loading ends, each loading end corresponds to one incident bar and is in contact with the first end of the corresponding incident bar so as to apply an axial load to the corresponding incident bar, and the second end of each incident bar is in contact with a stress surface of a test sample, so that when the dynamic mechanical property of the test sample is tested, the loading ends of the loading ends are in contact with the stress surface of the test sample. The two incident bars can transmit the load applied by the two-dimensional loading mechanism to a test sample, so that the test sample is subjected to two orthogonal compression waves with the same size at the same time.

The application relates to an alternating impact disassembly operation robot dynamic characteristic modeling method and system, and relates to the technical field of robot control. Firstly, the dynamic characteristics of the robot joint side and the motor side are comprehensively considered, a flexible joint dynamics model of torque driving is established, and the influence of joint flexibility on impact response is determined. Then, an exponential inelastic continuous contact model estimation method is used to estimate the radial impact force and the tangential friction force, an alternating impact dynamics model is constructed, the momentum change and the nonlinear dynamics effect in the impact process are quantified. Finally, a multi-space dynamic characteristic coupling model is established, the interaction mechanism of the joint space, the impact contact space and the task space is systematically analyzed, the accurate post-impact speed is output, the impact force control strategy is generated, the dynamic response accuracy of the robot under the alternating impact operation is improved, the active utilization of the impact effect of the robot is realized, and the stability, accuracy and efficiency of the disassembly operation are ensured.

The application discloses a kind of underwater impact test loading devices, including experimental pool, impact device and gravity potential energy conversion device;Experimental pool is used to provide underwater impact test environment;Impact device is set in the upper of experimental pool;Gravity potential energy conversion device is set in the side of experimental pool;Gravity potential energy conversion device converts gravity potential energy into traction, and gravity potential energy conversion device pulls impact device to impact test on the test piece of test piece tooling.The application efficiently transmits and converts the horizontal impact kinetic energy required by underwater impact body by energy conversion mechanism through vertical gravity power;At the same time, through the transmission path and the structure design of key components, the friction loss is reduced, the transmission stability and repeatability are improved, and the demand of precise controllable loading for underwater impact dynamics test of large water-related engineering structure is met.

The invention belongs to the technical field of cable conduits, and discloses a cable conduit impact effect equivalence analysis method and a portable testing device, and the method comprises the following specific steps: an impact dynamics simulation module: S1.1, inputting impact simulation parameters required by impact simulation analysis; compared with the prior art, the device has the following advantages: high portability and field adaptability: the device can be easily transported and quickly deployed in any field due to the modular detachable design, and the wide base and the adjustable support ensure the test stability and the adaptability to pipes with any length; the testing process is accurate and safe, mechanical height setting and releasing are achieved, energy setting is visual, the testing process is simple and rapid, and the detection efficiency is greatly improved; and good equivalence: by replacing the impact head and setting energy, test conditions of various industrial standards can be flexibly simulated, and the test result has good consistency and comparability with a traditional drop hammer test.

The application discloses a calculation method and system for deformation and failure modes of front and rear panels under fragment impact, and belongs to the technical field of impact dynamics and structure protection. In view of the hydrodynamic ram effect caused by high-speed fragment impact, three core parameters of dimensionless impact strength Π1, water-impact wave strength Π2 and cavitation extrusion load strength Π3 are constructed, which respectively represent three kinds of mechanical mechanisms of direct impact of fragments, bending driven by shock waves and extrusion of cavitation expansion. A quantitative criterion of the failure modes of the front and rear panels and the product of Π1 and Π3 is established, and three kinds of failure modes of shear impact, petal break and petal tearing are divided. Meanwhile, a linear model of local deformation and Π1, and a binary linear model of global deformation and Π2 and Π3 are established. The method does not need complex simulation, and the evaluation can be completed in seconds, the calculation efficiency is greatly improved, the prediction accuracy is greater than or equal to 93%, and is suitable for the impact resistance design and safety evaluation of liquid storage structures such as liquid tanks and oil tanks.

The invention discloses a multi-strain-rate and multi-waveform impact load integrated excitation device and a test method, and belongs to the technical field of civil engineering mechanical tests, the multi-strain-rate and multi-waveform impact load integrated excitation device comprises a common hydraulic loading system, a drop hammer driving device loading system, a dynamic hydraulic loading system, a pneumatic driving device loading system and a blasting driving device loading system; the common hydraulic loading system comprises a common oil cylinder, and the common oil cylinder is used for outputting hydraulic static load; the drop hammer driving device loading system is used for generating a drop hammer impact dynamic load with a medium strain rate; the dynamic hydraulic loading system is used for outputting any waveform pulse dynamic load with medium and low strain rates; compared with the prior art, the device has the advantages that various forms of impact loads can be applied, static loads and dynamic loads can be applied to the same test model at the same time, then the mechanical response of deep engineering rock mass under the superposition action of high ground stress static loads and multi-form impact disturbances can be simulated more accurately, and the device has the advantages of being high in integration level, high in applicability and accurate and controllable.

The invention relates to an arm blunt strike protection performance detection device based on dynamic data acquisition, and the device comprises a strike execution module which comprises a linear guide rail, a servo motor and a balancing weight, and the tail end of the strike execution module is provided with a standard shield impact head; according to the bionic arm module, a skeleton layer is of a 235 rigid structure, and the bionic arm module is composed of a wedge-shaped rigid structure and a cuboid rigid structure and used for simulating a human arm and conducting analysis; the data acquisition module is used for measuring impact force, torque and dynamic strain in real time, and an output signal of the data acquisition module is transmitted to a multi-channel data acquisition unit through a charge amplifier for corresponding data acquisition; and the self-adaptive clamp module comprises an adjustable lead screw supporting frame and a clamping mechanism and is used for ensuring the stability of the anti-riot shield or the test sample in the striking process. The invention also relates to a corresponding method, a processor and a storage medium thereof. By the adoption of the method, the processor and the storage medium, millisecond-level synchronous acquisition of the impact dynamics parameters is achieved, and more accurate and comprehensive data can be obtained.

This invention discloses an efficient analysis method for projectile-target separation during the penetration resistance process of a hollow heterogeneous protective structure, belonging to the field of impact dynamics. The method includes: for a given hollow heterogeneous protective structure; establishing a finite element model of the projectile; constructing a storage array for the spatial position information of the hollow heterogeneous protective structure; establishing a target drag function based on cavity expansion theory; constructing a projectile-target separation analysis model for the hollow heterogeneous protective structure; obtaining the results of the projectile-target separation analysis method using explicit dynamics methods; obtaining the storage array for the spatial position information of the hollow heterogeneous protective structure at the time of simulation termination, including projectile deformation, stress state, and the spatial position information at the time of simulation termination; further obtaining the crater morphology of the hollow heterogeneous protective structure through data processing of the storage array; and determining whether the given hollow heterogeneous protective structure will lead to projectile destruction by combining axial force and bending moment failure criteria. This invention achieves high-efficiency, low-cost, and rapid simulation analysis.

The present application relates to a kind of composite-metal hybrid structure impact dynamic response analysis method, comprising the following steps: S1, according to the impulse size of actual impact load in saturation response time, impact load is simplified;S2, when actual fiber metal laminated plate deformation increases to the damage of fiber, then the influence degree of damage is analyzed and calculated by introducing the stiffness reduction coefficient of fiber composite layer;S3, according to the different deformation mode of actual fiber metal laminated plate under impact load, dynamic response calculation is carried out in stages.The present application can start from the response theoretical analysis model of fiber metal laminated plate under impact load, consider the influence of large deformation damage stage reduction coefficient and specimen boundary slip of fiber metal laminated plate, according to the effective evaluation method of fiber metal laminated plate dynamic response under impact load that theoretical model is calculated in stages by the software of Matlab programming under large deformation stage.

A simulation experiment method and device for impact dynamic disaster induced by thick and multi-layer water-bearing overburden rock, characterized in that the device comprises a sealed box, a horizontal loading module, a vertical elastic loading module, a transient impact triggering module, a water-bearing overburden rock model and an array pipe water filling module; the array pipe water filling module is installed at the bottom of the box (11) through a mounting hole and a sealing ring (63), and the upper part of the array pipe water filling module is embedded in the water-bearing overburden rock model, and the inside is provided with array water pipes (62) with different lengths, and each water pipe is connected with a separate flow valve (65) and a pressure valve (64). The vertical elastic loading module solves the difficulty of large-size rock layer simulation, and provides reliable experimental equipment for disaster simulation.

The invention discloses a fault diagnosis method for rub-impact of rotors and stators of a double-rotor aero-engine. The fault diagnosis method comprises the following steps: establishing a rub-impact dynamic model between a low-pressure rotor and a stator of a double-rotor system; complete machine vibration measurement is carried out under the rotor and stator rub-impact fault working condition and the normal working condition, and vibration time domain data s1 (t) of the fault working condition and vibration time domain data s2 (t) of the normal working condition are obtained; combining the vibration time domain data s1 (t) and the vibration time domain data s2 (t) to obtain a vibration component group; defining a variable speed working condition, and constructing a working condition data set to train the fault diagnosis model; outputting a diagnosis threshold value under each working condition; the diagnosis threshold value under each working condition comprises an N1 vibration component threshold value, a 2N1 vibration component threshold value, an N2 vibration component threshold value and a 2N1-N2 vibration component threshold value; and realizing rotor and stator rub-impact fault diagnosis according to the diagnosis threshold value and the engine rotating speed. According to the technical scheme, the rotor and stator rub-impact fault feature enhancement and diagnosis problem under the common aero-engine speed increasing condition in engineering can be solved.

The invention relates to a single silt particle impact test device and a use method thereof, and belongs to the field of silt particle impact dynamics research in the field of hydraulic machinery. The device comprises a power control system, an air gun launching system, a high-speed photographing system and a universal adjusting system, wide-range regulation and control of the particle impact speed are achieved through the power control system, the particle size and trajectory are precisely regulated and controlled through the air gun launching system, the high-speed photographing system captures the particle motion trail and the surface deformation recovery process of a test piece, and precise simulation of particle multi-angle impact is completed through the universal adjusting system. The device can realize the wide range of speed (10-100 m / s), the wide range of particle size (1-5 mm) and the wide range of impact angle (5-90 degrees), and can effectively reproduce the impact damage behavior of multi-scale sediment particles on the wall surface of the device under the working condition of hydraulic machinery. The device can efficiently carry out a single sediment particle impact test, is accurate in regulation and control, is wide in applicability, and has an important application value for related research of hydraulic machinery sediment impact.

The invention discloses a double-sided immersion flexible connection double-layer plate deepwater explosion impact resistance calculation method, particularly relates to the technical field of underwater explosion impact dynamics, and comprises a compressible multiphase flow calculation method, a fluid-solid coupling calculation method and a structure response calculation method. The motion response of the double-layer plate, the pressure on each fluid-structure interaction surface of the double-layer plate, the external flow field and the interlayer water and the fluid cavitation evolution process in the external flow field and the interlayer water can be calculated.

This invention discloses a scaled-down design method for the impact dynamic response of aircraft stiffened plate structures, belonging to the field of aircraft structural / strength testing technology. The method comprises the following steps: defining the load parameters and geometric parameters of the aircraft stiffened plate; calculating the relative stiffness of the stiffened plate; defining the basic geometric similarity ratio of the scaled-down model of the stiffened plate; determining the similarity ratio of the stiffened plate panel thickness; determining the similarity ratio of the width, height, and spacing of the stiffeners; obtaining the geometric dimensions of the scaled-down model of the stiffened plate; acquiring the dynamic response of the scaled-down model of the stiffened plate; and, based on the similarity ratio of the dynamic response, using the scaled-down model of the stiffened plate to predict the dynamic response of the prototype. This invention overcomes the practical difficulty of scaling down test specimens based on geometric similarity for thin-walled structures like aircraft stiffened plates, while simultaneously shortening the testing cycle and scale, and saving costs.

The present invention discloses a light gas gun flyer pressurization device and method, which relates to the fields of impact dynamics and shock wave physics. The device comprises a light gas gun, a detonation driver, flyers, and a target plate. The target plate is arranged at the right end of the detonation driver, and the detonation driver is arranged at the right end of the light gas gun. Flyers are arranged at the end of the light gas gun, between the detonation driver and the target plate. The flyers include a first-stage flyer, a gradient flyer, and a second-stage flyer. The centers of the second-stage flyer, the gradient flyer, and the first-stage flyer are located at the same horizontal height. The present invention adopts the above-mentioned light gas gun flyer pressurization device and method. Based on the impact loading platform of light gas guns such as first-stage gas guns, second-stage gas guns, and hydrogen-oxygen guns, the device and method can significantly increase the speed and impact pressure of the target by adding a detonation driver and gradient flyers to the tail section of the launch tube without changing the structure and launch process of the light gas gun. Compared with a three-stage gun, the experimental cost can be significantly reduced.

The invention discloses an anti-impact laser inertial navigation stabilizing device, and relates to the technical field of inertial navigation, the anti-impact laser inertial navigation stabilizing device comprises a bottom sensing layer used for collecting original data of impact dynamic and mechanical deformation, a data processing layer used for receiving the original data and calculating an impact gradient factor, a shock absorber deformation coupling coefficient and a sensor credibility weight through an algorithm model, the feedback control layer outputs a control instruction according to the credibility weight of the sensor, the data processing layer calculates an impact gradient factor through a sliding window algorithm on the basis of the bottom sensing layer, and calculates a shock absorber deformation coupling coefficient through least square fitting in combination with the real-time deformation quantity of the shock absorber, the impact load and the elastic modulus of a shock absorption material, and the shock absorber deformation coupling coefficient is obtained. According to the method, the three-dimensional quantification of the impact dynamic state of the laser inertial navigation stabilizing device, the dynamic coupling of mechanical deformation and the scene self-adaptive decision of the data credibility can be realized.

The application provides a cross-scale scaled model test design method for a transient strong nonlinear process, belongs to the technical field of structural impact dynamics model test, and is based on a scale similarity conversion model, introduces similarity conversion coefficients and an uncertainty control index therein, and constructs a scale similarity conversion equation from model test results to prototype responses.Combining self-similarity and scale invariance of the strong nonlinear system, discrete constraint is applied to a scaledown ratio of the cross-scale test, scale levels are defined, three types of cross-scale model conversion, i.e., large-middle-large, large-small and middle-small, can still realize cross-scale similarity conversion of strong impact response time histories such as acceleration and strain under the condition that medium parameters, material parameters and boundaries inevitably distort; and the method is suitable for model test data compensation deduction of prototypes of various strong impact response structures such as explosion impact, collision, drop, throwing into water / into soil and impact vibration.