30 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 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 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 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.

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 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.

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 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.

The utility model discloses a buffer vertical impact dynamic test small platform, which comprises an installation platform, a guide column, an impact module, a lifting module, a lifting module driving structure, an electromagnet, a force sensor and a buffer displacement detection unit, the impact module and the lifting module are both installed on the guide column in a sleeving mode, the impact module is located below the lifting module, the lifting module driving structure is connected with the lifting module, the electromagnet is fixedly installed below the lifting module, the force sensor is fixedly installed below the impact module, and the force sensor is connected with the impact module. The buffer displacement detection unit is used for detecting the length change of the buffer. The small platform for the buffer vertical impact dynamic test is reasonable in structure, and can perform the buffer vertical impact dynamic test so as to obtain impact force data and length change data of the buffer.

The application discloses an underwater impact test pool, which comprises an experimental pool, an impact device, a gravity potential energy conversion device and a test piece tooling; the experimental pool is used for providing an underwater impact test environment; the impact device is arranged above the experimental pool; the test piece tooling is arranged in the experimental pool and is used for fixing a columnar or plate-shaped test piece; and the gravity potential energy conversion device is arranged beside the experimental pool. The vertical gravity power is efficiently transmitted and converted into the horizontal impact kinetic energy required by the underwater impact body through the energy conversion mechanism; meanwhile, the friction loss is reduced, the transmission stability and repeatability are improved through the transmission path and the structure design of the key components, and the demand of the precise controllable loading for the underwater impact dynamics test of large water-related engineering structures is met.

The invention relates to the technical field of oil and gas production, in particular to a safety evaluation method for a packer mandrel under the action of perforation detonation, which comprises the following steps of: establishing a three-dimensional assembly model of a perforation pipe string; performing perforation impact force theoretical analysis; establishing a finite element model of the transient impact dynamics of the perforation pipe string; and the impact stress borne by the packer mandrel is calculated, and the impact fracture failure mechanism of the mandrel is analyzed in combination with the Mises stress nephogram change. According to the method, the perforation detonation impact load calculation model is established, the influence of the impact load on the perforation tubular column is quantitatively evaluated, a theoretical basis and guidance can be provided for perforation operation safety in actual production, and the method has important significance in guaranteeing safe and efficient oil testing of the southern ultra-deep well.

The application relates to a method for analyzing fluid-structure coupling vibration characteristics of a rotating blade-casing rub-impact system, and belongs to the technical field of aero-engine dynamics analysis. The method comprises the following steps: a rotating blade-rigid casing rub-impact dynamics model considering radial / angle misalignment is established, prestress modal analysis is performed on the blade to obtain modal characteristics of the blade; the rotating blade flow passage is divided into a structured grid, real aerodynamic force on the blade surface is obtained through fluid simulation and grid independence verification; in a one-way fluid-structure coupling mode, transient rub-impact analysis is performed on the aerodynamic force as external load combined with centrifugal force effect, and stable periodic results are extracted to obtain system vibration characteristics. The application solves the problems in the prior art, such as simplified aerodynamic force, poor adaptability of a rub-impact force model, and lack of misalignment fault analysis under fluid-structure coupling, improves analysis accuracy, provides precise theoretical support for reliability design and fault prevention of an aero-engine, and has remarkable industrial application value.

The invention relates to the technical field of elastic-plastic impact dynamics research, in particular to a method for establishing an impact stress analytical model of an unpaved soil runway based on a Hansel-FFTLog algorithm. The method is used for solving the problem of coupling of soil nonlinear viscoelasticity and interface fractal roughness characteristics in impact stress analysis of an unpaved soil runway. Comprising the following steps: establishing a soil viscoelastic constitutive structure based on a Caputo fractional derivative, deducing contact pressure distribution in combination with a fractal contact theory, and converting a spatial domain integral equation into a frequency domain algebraic equation by adopting a Hankel transform and fast Fourier transform logarithmic algorithm combined decoupling strategy, so that the calculation complexity is remarkably reduced. The method can cover typical parameter ranges such as elasticity moduli and Poisson ratios of different types of soil, an established analytical coupling normal form provides a universal tool for nonlinear coupling problems in the fields of airport engineering, rock and soil mechanics and the like, and rapid evaluation and optimal design of impact stress of the soil runway are effectively supported.

The invention discloses a method for calculating the water entry slamming pressure of an open cavity in waves, relates to the technical field of ocean engineering, is used for predicting the water entry process of the open cavity, and comprises the steps of constructing a geometric model of the open cavity, constructing a wave field, and simulating the movement process of a target cavity entering the wave field and the movement process of the target cavity in the wave field. Constructing a time domain motion equation of the target cavity, solving the time domain motion equation of the target cavity by adopting a numerical integration method, and calculating a hydrostatic pressure component, an entry water impact dynamic pressure component, an in-cavity air fluctuation pressure component and a wave induction dynamic pressure component of the target cavity; and performing decoupling calculation on the water entry slamming pressure of the target cavity based on the four sub-components. According to the method, the coupling dynamic model of the wave field and the water entry process of the open cavity is established by combining a multi-phase coupling action mechanism, and the calculation precision of slamming pressure distribution and time history characteristics of the open cylindrical cavity at the water entry moment and in the subsequent process under the wave condition is improved.

The application discloses a kind of prediction methods of the degree of fragmentation of concrete structure under explosive load, belong to the field of explosion mechanics and impact dynamics.The application analyzes the propagation process of explosion energy by detonation theory;Based on the deformation potential theory, the deformation energy of the concrete structure under the action of explosive load is calculated;Combined with Griffith fracture theory, the energy dissipation in the fragmentation process of concrete structure is calculated;Using kinematics theory and kinetic energy theorem, the initial kinetic energy of secondary fragments of concrete structure under explosive load is determined;Then, based on the principle of energy conservation, the degree of fragmentation of concrete structure under explosive load is determined;The energy dissipation and the parameter information of secondary fragments of concrete structure at different periods in the explosion process are effectively predicted.The application is suitable for military defense and blasting fields, and the parameter information is used to optimize the concrete structure, improve the explosion defense effect or the blasting effect on the concrete structure.

The application discloses an underwater impact test loading system, which comprises an experiment pool, an impact device, a gravity potential energy conversion device and a test piece tooling; the experiment pool is used for providing an underwater impact test environment; the impact device is arranged above the experiment pool; the test piece tooling is arranged in the experiment pool and is used for fixing a columnar or plate-shaped test piece; the gravity potential energy conversion device is arranged beside the experiment pool; the gravity potential energy conversion device converts gravity potential energy into traction force, and the impact device is pulled by the gravity potential energy conversion device to perform an impact test on the test piece on the test piece tooling. The vertical gravity power is efficiently transmitted and converted into horizontal impact kinetic energy required by an underwater impact body through an energy conversion mechanism; meanwhile, the transmission stability and repeatability are improved and the friction loss is reduced through the transmission path and the structure design of key components, so that the demand of precise and controllable loading for underwater impact dynamics tests of large water-related engineering structures is met.

The application belongs to the field of impact dynamics in aircraft design, and particularly relates to a dynamic response life test design method of an aircraft wheel fender. The method comprises the following steps: calculating total test cycles; dividing test stages and determining the test cycles corresponding to each test stage; determining the test cycles corresponding to the land-based use takeoff number and the test cycles corresponding to the ship-based use takeoff number in each test stage; determining the test conditions and test cycles of each test period; determining the test cycles corresponding to the normal air pressure test and the low air pressure test in each test period; and carrying out the dynamic response life test of the wheel fender according to the determined test parameters. The application can examine the stability, installation reliability and other comprehensive performances of the wheel fender structure.