52 results about "Nonlinear beam" patented technology

The invention is a differential 3D Quantitative-Imaging Ultrasonic Tomography method for inspecting a layered system that is comprised of a heterogeneous object embedded in a volume of space that comprises layers having an acoustic impedance gradient between the layers providing non-linear beams travels. A transducer grid is attached to the surface of the layered system in a unilateral manner. By sequentially changing the distance between transmitter and receiver the fastest travel times of the ultrasonic oscillations are measured. A differential approach provides from the data the longitudinal wave velocities values for each elementary volume that make up an inspected volume. These values are used to construct two and three-dimensional maps of the longitudinal wave velocity values distribution in the inspected volume and the porosity values distribution in the heterogeneous object. By applying statistical treatment to the obtained data the longitudinal wave velocity in the inspected material matrix part is estimated.

The invention relates to a modeling method of a large-flexibility flight vehicle based on online identification. The modeling method comprises the four steps of building of a unit mechanism model, parameterization of the unit model, building of an overall flight dynamic model and online identification. According to the fact that when the large-flexibility vehicle is on flight, wings can be subjected to geometric nonlinearity deformation, and a structural model of flexible wings is built based on a nonlinear beam theory; a continuous vibration system is discretized to obtain a unit structure model; aiming at the feature that aerodynamic force is unsteady, an unsteady aerodynamic theory is utilized to build an aerodynamic force model; the aerodynamic force model and external forces like gravity are substituted into the structural model to obtain a unit gas bomb mechanism model; according to needs, variables capable of being measured by proper sensors are selected as parameters, and parameteriztion of the unit model is conducted; moreover, the parameters are utilized to achieve connection among units; a many-body dynamic theory is utilized to build the overall dynamic model of the flight vehicle; finally, a proper sensor is selected to achieve parameter online identification to obtain the large-flexibility flight vehicle real-time dynamic model.

The invention discloses a clamped beam structure nonlinear dynamic characteristic analysis method considering boundary displacement, and the method comprises the following steps: calculating an analytical solution of a deflection curve of a clamped beam through nonlinear analysis according to the boundary displacement and structural material parameters; a clamped beam structure nonlinear vibrationequation considering boundary displacement is established, a variable coefficient vibration differential equation is solved through a matrix transfer method and a step-by-step search method, and thena beam structure nonlinear vibration modal frequency and modal shape analytical solution considering boundary displacement is obtained. According to the dynamic characteristic analysis method, the influence of boundary displacement on the dynamic characteristics of the geometric nonlinear beam is considered, and the coupling effect of the beam deflection and the vibration mode is considered. Themethod can effectively improve the dynamic characteristic analysis precision of the beam structure in a complex environment, and guides the design of an engineering structure.

The invention relates to an automobile steel plate spring dynamic-simulation method, which comprises the following steps of: A, extracting a series of points as lumped mass units along the centerline of each leaf spring, and extracting central points of a front spring eye and a rear spring eye of a first leaf spring when the leaf spring is the first leaf spring, wherein the centerline is the line of intersection of a thickness direction and a width direction; B, sequentially connecting each point by using a Nonlinear Beam command in an Adams / Car environment to form a discrete beam structure of each leaf spring; C, independently producing a model of the spring eye of the first leaf spring, and connecting the model of the spring eye with the other lumped mass units by using a Massless Beam command of an Adams / View module; and D, defining a frictional force between spring leaves by using a VFORCE function in the Adams / View environment, and defining an impact force between the spring leaves by using an IMPACT function. The simulation method provided by the invention is flexibly designed and high in simulation accuracy; designing parameters are easy to change; and automobile designing efficiency is greatly improved.

The invention discloses a pre-bending and pre-twisting design method for a flexible blade of a wind turbine based on an aeroelastic model. The method comprises the following steps: S1, giving a targetaerodynamic shape of the blade and basic parameters of the wind turbine; S2, establishing an aeroelasticity time domain model of the wind turbine blade; S3, calculating the aeroelastic deformation ofthe original blade; S4, estimating the pre-bending and pre-twisting shapes of the blade; And S5, calculating the aeroelastic deformation of the blade after pre-bending and pre-twisting, and judging whether to converge or not. An aeroelastic model aeroelastic model is established by adopting a nonlinear beam theory and a lifting surface method based on a potential flow theory; the accuracy and thespeed of model calculation in the iteration process are ensured; According to the method, the pre-bending and pre-twisting geometric shape of the blade can be efficiently obtained, and the deformation of the blade at all radius positions is taken into the convergence judgment standard, so that the target aerodynamic shape can be achieved within the whole blade extension range after the flexible blade generates aeroelastic deformation, and the flexible blade can work in the optimal state.

The invention discloses a hollow-solid composite multi-core photonic crystal fiber and a laser amplifying method thereof. The fiber comprises a protection layer, a covering layer and a fiber core successively from exterior to interior. The fiber core comprises a solid gain fiber core and a hollow fiber core. The covering layer and the hollow fiber core form a structure which is the same as a hollow photonic crystal fiber. According to the invention, by combining the hollow photonic crystal fiber and a multi-core photonic crystal fiber, and combining the high damage threshold of the hollow photonic crystal fiber and the nonlinear beam combination of the multi-core photonic crystal fiber, advantages of them are completely kept; use restriction of them is overcome; laser energy will not be restrained by the damage threshold of the multi-layered photonic crystal fiber; and the single-module laser pulse peak power is amplified and output to the GW level or the average power is amplified and output to the 100kW level.

The invention discloses a flight dynamics modeling method considering structure and pneumatic nonlinearity, and the method comprises the following steps: decoupling a three-dimensional beam problem of an unmanned aerial vehicle structure into nonlinear beam motion analysis and beam section deformation analysis, and establishing an unmanned aerial vehicle nonlinear structure model; establishing an unmanned aerial vehicle nonlinear aerodynamic model based on an aerodynamic reduced-order model, establishing an unmanned aerial vehicle nonlinear aeroelastic model through coupling of a structural model and an aerodynamic model, substituting contribution items and boundary condition items of a gravity load and an aerodynamic load into a structural semi-discretization equation, obtaining a nonlinear aeroelasticity and flight dynamics coupling model of the flexible aircraft, solving a static equilibrium solution of a system equation based on a Newton-Raphson method, and solving nonlinear time domain response by adopting a Generalized-alpha algorithm.

The invention discloses a nonlinear beam unit analysis method considering prestressed tendon bonding slippage, which comprises the following steps: establishing an overall structure analysis model according to the geometric dimension of a prestressed concrete beam, dividing calculation units, and assembling unit stiffness matrixes into a structural overall stiffness matrix; applying load and boundary conditions to the overall structure analysis model, and solving the overall analysis model by adopting a Newton iteration method; and extracting calculation results of structural deformation, stress, section internal force, prestressed tendon relative slippage and the like, drawing a load-deformation curve, and calculating structural rigidity and bearing capacity according to the slope and peak value of the curve. The calculation unit provided by the invention is an 8-degree-of-freedom beam unit, not only is the stress characteristic of the beam structure considered, but also the bond slip characteristic of the prestressed tendon is considered, the problem that a traditional beam unit analysis model cannot consider the bond slip effect of the prestressed tendon is solved, and compared with an entity unit analysis model, the convergence is better, and the calculation efficiency is higher.

The invention belongs to traveling-wave tube simulation techniques, and discloses a Euler method for simulating beam-wave interaction of traveling-wave tubes. Aimed at the problem that calculation precision of existing traveling-wave tubes with the Euler nonlinear theory is low, based on a Lagrangian field theory model, a new treatment method is adopted for electronic phase. The method comprises the steps that Fourier first-order expansion is conducted on the electronic phase; then Bessel function relation is adopted; a nonlinear beam-wave interaction theory model based on a Euler coordinate system is built. The Euler method has the advantages of fast calculation and low memory consumption, the moderate beam-wave interaction process of helix traveling-wave tubes can be precisely simulated, and the method lays a foundation for a study of traveling-wave tube nonlinear theory.

The invention discloses a five-axis machining cutter location linear interpolation optimization control method, which relates to the technical field of numerical control machining, and comprises the following steps: fitting a machining contour to generate a curve expression, determining an operation point sequence based on curvature distribution, and converting the operation point sequence into an actuator pose sequence; based on the model of a five-axis machining machine tool, a total transformation matrix from a base coordinate system to an actuator coordinate system is established through a D-H method, motion parameter changes caused by five-axis elastic deformation and inertia force are established based on the nonlinear beam theory and the Alembert principle, and a nonlinear axis body coupling motion equation is established; a correction expression is generated in combination with the Jacobian matrix, optimal unknown parameters in the correction expression are determined by introducing a quantum fluctuation simulated annealing algorithm, and a correction Jacobian matrix is generated; according to the actuator pose change of the adjacent operation points in the actuator pose sequence, the corrected Jacobian matrix is combined, the inverse kinematics algorithm is adopted to derive the motion parameter vector of the previous operation point, and higher-precision machining control is achieved.

The invention discloses a regional pickup method for small microphone array equipment, which comprises the following steps of: receiving a multi-channel voice input signal of microphone equipment, and performing nonlinear beam forming to obtain a plurality of weight gains corresponding to each frequency point data in a pickup region and a shielding region; performing region synthesis on the multi-beam data set by using a region synthesis algorithm to obtain a final weight gain of each frequency point; processing the regional beam signal by using a voice activity detection algorithm based on a neural network to obtain a voice signal and a noise signal label; detecting the multi-beam data set and the regional beam signal to obtain a pickup region voice signal and a shielding region voice signal label; according to the tag, the voice signal in the pickup area is enhanced, the signal needing to be shielded is suppressed, and the noise signal is not processed. According to the invention, a high-directivity regional pickup effect can be realized, so that the microphone equipment can pick up sound of a specified region of interest without distortion, and interference sound outside the region is shielded at the same time.

The invention discloses a local quasi-phase matching improvement method for the multi-point focusing frequency doubling process, is improved on the basis of local quasi-phase matching (LQPM) and can provide better phase matching for the multi-point focusing process. The method is specifically characterized in that the phase relationship between adjacent matching points is considered, an original LQPM superlattice structure design function is corrected by adding a coupling phase term, mutual interference of the adjacent matching points in the secondary harmonic propagation direction is suppressed, moreover, harmonic conversion efficiency of the nonlinear process is improved. The LQPM improved method can further be considered as a method of generating nonlinear beam shaping, through design of the superlattice domain structure, frequency conversion and secondary harmonic wavefront modulation can be simultaneously realized, and the secondary harmonic propagation trajectory can be arbitrarily designed and is not limited to common beams such as the Airy beam. The method is advantaged in that focusing accuracy and frequency doubling conversion efficiency of frequency doubling dense focusing are improved, and important applications in improving nonlinear optical imaging quality and beam quality are achieved.

The invention provides an environmental abnormality monitoring sensor based on a nonlinear structure. The environmental abnormality monitoring sensor is characterized by including: a fixed end, an excitation piezoelectric film, a perforated cantilever beam, a detection piezoelectric film, an adsorption film and a nonlinear beam. One end of the perforated cantilever beam is fixed to the fixed end, the excitation piezoelectric film is connected to the perforated cantilever beam close to a position fixed to the fixed end, the other end, i.e. a free end of the perforated cantilever beam is equipped with holes, the nonlinear beam is connected above the holes, and the detection piezoelectric film and the adsorption film are connected to the upper surface of the nonlinear beam. When the adsorption film adsorbs a detected substance, the detection piezoelectric film output changes dramatically, thereby judging the dosage of the adsorbate. The monitoring sensor provided by the invention can be used for monitoring of gas concentration, microparticle mass and microorganisms, etc., and has the advantages of simple structure, quick response, high sensitivity and no damping influence, etc.

The invention discloses an angular motion measuring device based on nonlinear light wave beam splitting and combining. The angular motion measuring device comprises a light source, a nonlinear beam splitter, a first circulator, a first modulator, an optical fiber ring, a second circulator, a second modulator, a nonlinear beam combiner and a detector. Nonlinear beam splitting is carried out on light source light, then the two beams of light pass through a symmetrical and uniform propagation path, the phase difference of the two beams of light is reduced to the maximum extent, measurement of theultrahigh sensitivity of the angular velocity of a carrier can be achieved, and the device has the characteristic of measuring extremely small angular velocity changes of the carrier and has the characteristic of breaking through the standard quantum limit (N is the average photon number of the incident end).

The invention discloses a collision effect analysis method for a bridge-track system under the action of earthquake. The collision effect analysis method comprises the following steps: (1) simulating non-linear constrain between a bridge and a track by adopting nonlinear beam elements or spring elements; (2) simulating the secondary dead load of the bridge by adopting a quality unit; (3) simulating a collision behavior of the bridge by adopting a spring to be connected with dampers in parallel and then connected with an interspace in series; (4) establishing steel rails with certain lengths outside the bridge; (5) simulating a sliding support by adopting a nonlinear spring; (6) simulating piers by adopting nonlinear fiber beam elements; (7) simulating the pile-oil interaction through equivalent-stiffness springs; (8) establishing great-quality units and applying acceleration time courses at pier bottoms to carry out uniform or non-uniform excitation. Compared with the prior art, the method considers the influence of a track structure on the earthquake response of the bridge, can analyze the earthquake response of the bridge-track system, and can also research the collision effect among the bridges; the analysis result meets the fact better.

The invention relates to the technical field of metasurfaces, and particularly discloses a stacked Moire metasurface-based nonlinear beam shaping method, which comprises the following steps of: acquiring a frequency doubling wavelength of fundamental frequency light and a target emission angle of a nonlinear beam; calculating to obtain a Moire lattice quasi-period of the stacked Moire metasurface; the corresponding relation between the lattice period and the distortion angle of the stacked Moire metasurface is obtained through calculation; obtaining the stacked Moire metasurface with the corresponding relation; the fundamental frequency light irradiates the surface of the stacked Moire metasurface to form a nonlinear light beam, and the value of the emission angle of the nonlinear light beam is the target emission angle. According to the method, the corresponding relation between the lattice periods and the distortion angles of the stacked Moire metasurface is calculated according to the target emission angle of the nonlinear light beam, the stacked Moire metasurface with different lattice periods and distortion angles is manufactured, rich momentum components are formed through combination of reciprocal lattice vectors of a plurality of basic metasurfaces, and the deformation of the momentum components is reduced. Therefore, the nonlinear light beam is accurately modulated.

The invention provides a continuous variable strong entanglement coherence enhancement device based on a nonlinear beam splitter, and the device comprises a light source unit which comprises an EPR strong entanglement light source and an EPR first weak entanglement light source, wherein the EPR strong entanglement light source is provided with an output end A, and the EPR first weak entanglement light source is provided with a first output end and a second output end; a first photon detector which is connected with the first output end; a first free space optical channel which is provided with an input end M1 and an output end N1, wherein the input end M1 is connected with the output end A; a first optical reflector which is provided with an input end P1 and an output end Q1, wherein the input end P1 is connected with the second output end; a first optical nonlinear beam splitter which is provided with an input end X1, an input end X2, an output end Y1 and an output end Y2, wherein the input end X1 is connected with the output end N1, the input end X2 is connected with the output end Q1, and the output end Y2 is used for outputting one mode of the two-mode entangled state; and a third photon detector which is connected with the output end Y1.

The invention discloses a solid laser array amplifier, and the array amplifier comprises a body shell, an isolation end, a water guide end, a rod sleeve, a crystal adjustable unit, a lamp pressing plate and a unit matching structure. An upper-layer pumping coupling cavity and a lower-layer pumping coupling cavity are arranged in the body shell, and two crystal bars and three xenon lamps are arranged in each pumping coupling cavity at equal intervals, so the laser amplifier can amplify a plurality of laser beams at the same time. A xenon lamp is fixed through a lamp pressing plate, rod sleeves are installed at the two ends of a crystal rod, a crystal is installed in an amplifier through a micro-adjustment assembly of a crystal adjustable unit, and the crystal rod has the radial adjustable range of + / -0.5 mm to + / -1.5 mm by means of the elasticity of an inner rubber gasket and an outer rubber gasket. The solid laser array amplifier solves the problems that an existing laser amplifier is difficult to amplify a multi-beam laser array and the position of a crystal rod cannot be adjusted. The solid laser array amplifier can be applied to a high-power laser nonlinear beam combination technology.

The invention discloses a hollow-solid composite multi-core photonic crystal fiber and a laser amplifying method thereof. The fiber comprises a protection layer, a covering layer and a fiber core successively from exterior to interior. The fiber core comprises a solid gain fiber core and a hollow fiber core. The covering layer and the hollow fiber core form a structure which is the same as a hollow photonic crystal fiber. According to the invention, by combining the hollow photonic crystal fiber and a multi-core photonic crystal fiber, and combining the high damage threshold of the hollow photonic crystal fiber and the nonlinear beam combination of the multi-core photonic crystal fiber, advantages of them are completely kept; use restriction of them is overcome; laser energy will not be restrained by the damage threshold of the multi-layered photonic crystal fiber; and the single-module laser pulse peak power is amplified and output to the GW level or the average power is amplified and output to the 100kW level.

The invention belongs to the field of vacuum electronic devices, and particularly relates to an attenuation solving method for a high-frequency structure of a G-band edge-aligned staggered-grid traveling wave tube. According to the method, attenuation definition of a passive device is introduced into a high-frequency structure of an active device-G wave band edge-aligned staggered-grid traveling wave tube for the first time, the method is deviated from an axial change rate solving mode of time average radio frequency power P used for solving attenuation constants of an existing high-frequency structure, and the method is based on the basic theory of attenuation and transmission. And derivation and numerical verification are carried out to obtain a G-band edge-aligned staggered-grid traveling wave tube high-frequency structure attenuation constant solving formula, the solved attenuation constant can support calculation of a three-dimensional large-signal nonlinear beam-wave interaction solver BWISFW, and compared with CST-PIC, the calculation results are consistent. The attenuation constant calculation method provided by the invention is particularly suitable for a G-band edge-aligned staggered-grid traveling wave tube high-frequency structure, and is beneficial to shortening the development period and reducing the production cost.

The present invention provides a cell laboratory observation system based on beam bundle light, which relates to the technical field of analysis and processing. It includes a non-linear beam self-fusion generator, a quantum entanglement state modulation network, a cell microenvironment response matrix, and a super-topological light field reconstruction unit for super-resolution observation and dynamic intervention of cells. Through the non-linear beam self-fusion technology, a self-focusing beam is generated by using a non-linear crystal doped with rare earth ions, and the focusing depth is dynamically adjusted by combining with a liquid crystal modulator, achieving sub-micron-level focusing without traditional lenses. The quantum entanglement state modulation network breaks through the optical diffraction limit through the non-local characteristics of entangled photon pairs. In addition, the chiral vortex beam generated by the super-topological light field reconstruction unit maintains high intensity and high resolution in deep tissues, enabling researchers to clearly observe fine structures such as neuron synapses or myocardial cell gap junctions in deep tissues, providing a high-precision tool for studying complex biological systems.

The application belongs to the field of vacuum electron devices, and particularly relates to a kind of attenuation solving method of G-band edge alignment staggered grid row wave tube high-frequency structure.The attenuation quantity definition of passive device is introduced into the high-frequency structure of active device-G-band edge alignment staggered grid row wave tube for the first time, and the solving method of the change rate of time-averaged radio frequency power P along the axial direction used in the solving of attenuation constant of existing high-frequency structure is deviated, the solving formula of attenuation constant of G-band edge alignment staggered grid row wave tube high-frequency structure is obtained by starting from the basic theory of attenuation and transmission, deduction and numerical verification, the attenuation constant solved can support 3-dimensional large signal nonlinear beam-wave interaction solver BWISFW calculation, and compared with CST-PIC, the calculation results are consistent.The attenuation constant calculation method provided by the application is especially suitable for G-band edge alignment staggered grid row wave tube high-frequency structure, and is helpful to shorten the development cycle and reduce the production cost.

The invention discloses a slow wave circuit assembly with a high-frequency load cutting structure. The slow wave circuit assembly with the high-frequency load cutting structure comprises an input waveguide (1), a coupling cavity (2) and an output waveguide (3). The coupling cavity (2) is composed of a cavity loop assembly (4). The cavity loop assembly (4) is composed of a cavity loop (4-1) and a cavity sheet (4-2). The high-frequency load cutting structure (5) is arranged in the cavity loop assembly (4). According to the slow wave circuit assembly with the high-frequency load cutting structure, the structural design is reasonable, the dispersion characteristic is good, the cooling efficiency is high, nonlinear beam-wave interaction is high, and the slow wave circuit assembly with the high-frequency load cutting structure can be widely applied to a traveling-wave tube with the large duty ratio and can overcome the shortages in the prior art.

The invention is a differential 3D Quantitative-Imaging Ultrasonic Tomography method for inspecting a layered system that is comprised of a heterogeneous object embedded in a volume of space that comprises layers having an acoustic impedance gradient between the layers providing non-linear beams travels. A transducer grid is attached to the surface of the layered system in a unilateral manner. By sequentially changing the distance between transmitter and receiver the fastest travel times of the ultrasonic oscillations are measured. A differential approach provides from the data the longitudinal wave velocities values for each elementary volume that make up an inspected volume. These values are used to construct two and three-dimensional maps of the longitudinal wave velocity values distribution in the inspected volume and the porosity values distribution in the heterogeneous object. By applying statistical treatment to the obtained data the longitudinal wave velocity in the inspected material matrix part is estimated.

The invention relates to an ultrasonic imaging quality optimization method based on nonlinear adaptive weighting, and belongs to the technical field of ultrasonic imaging, and the method comprises the following steps: S1, carrying out the focusing delay processing of an echo signal obtained through the sampling of an ultrasonic array element, and obtaining the time-aligned ultrasonic echo data x (k); s2, performing nonlinear processing s (k) of absolute value obtaining, n-time root number opening and sign obtaining on the ultrasonic echo data after time alignment; s3, calculating the mean value of the echo data after nonlinear processing, and calculating the nth power of the mean value to obtain the output ypDASn (k) of the nonlinear beam forming method; s4, calculating the total incoherent intensity yNC (k), and dividing the total incoherent intensity yNC (k) by a nonlinear beam forming method to obtain a nonlinear adaptive coherence factor NCFn (k); and S5, weighting the ypDASn (k) by adopting the NCFn (k) to obtain a final beam forming output yNCFn (k).

The invention relates to a modeling method of a large-flexibility flight vehicle based on online identification. The modeling method comprises the four steps of building of a unit mechanism model, parameterization of the unit model, building of an overall flight dynamic model and online identification. According to the fact that when the large-flexibility vehicle is on flight, wings can be subjected to geometric nonlinearity deformation, and a structural model of flexible wings is built based on a nonlinear beam theory; a continuous vibration system is discretized to obtain a unit structure model; aiming at the feature that aerodynamic force is unsteady, an unsteady aerodynamic theory is utilized to build an aerodynamic force model; the aerodynamic force model and external forces like gravity are substituted into the structural model to obtain a unit gas bomb mechanism model; according to needs, variables capable of being measured by proper sensors are selected as parameters, and parameteriztion of the unit model is conducted; moreover, the parameters are utilized to achieve connection among units; a many-body dynamic theory is utilized to build the overall dynamic model of the flight vehicle; finally, a proper sensor is selected to achieve parameter online identification to obtain the large-flexibility flight vehicle real-time dynamic model.

A method and system for beam shaping employing a non-collinear quasi phase-matched interaction in a crystal whose nonlinear coefficient was encoded by a computer generated hologram is provided herein. The same axis is used for both satisfying the phase-matching requirements and encoding the holographic information. This allows one-dimensional beam shaping using a very simple to fabricate nonlinear crystal pattern and two-dimensional beam shaping with high conversion efficiency. Both are demonstrated by converting a fundamental Gaussian beam into Hermite-Gaussian and Laguerre-Gaussian beams at the second harmonic in KTiOPO4 and stoichiometric lithium tantalate. The suggested scheme enables broad wavelength tuning by simply tilting the crystal.

This invention relates to the field of metasurface technology, specifically disclosing a nonlinear beam shaping method based on stacked moiré metasurfaces. The method includes: obtaining the frequency harmonic wavelength of the fundamental light and the target emission angle of the nonlinear beam; calculating the quasi-period of the moiré lattice of the stacked moiré metasurface; calculating the correspondence between the lattice period and the twist angle of the stacked moiré metasurface; obtaining a stacked moiré metasurface with the stated correspondence; and forming a nonlinear beam by irradiating the fundamental light onto the stacked moiré metasurface, wherein the emission angle of the nonlinear beam is the target emission angle. This invention calculates the correspondence between the lattice period and the twist angle of the stacked moiré metasurface based on the target emission angle of the nonlinear beam, fabricates stacked moiré metasurfaces with different lattice periods and twist angles, and forms rich momentum components through the combination of reciprocal lattice vectors of multiple basic metasurfaces, thereby precisely modulating the nonlinear beam.

The invention relates to a method for efficiently obtaining the gust load of an unmanned aerial vehicle, and belongs to the technical field of aircrafts and aeroelasticity. The method comprises the steps that firstly, a nonlinear wing beam model with strain as a variable is determined, and a section constitutive relation matrix of each beam section is obtained based on the nonlinear wing beam model; secondly, a nonlinear static aeroelastic model is constructed based on an unsteady vortex grid method, gust disturbance is introduced into the model, aerodynamic force corresponding to each beam section is obtained, and numerical solution is performed based on the nonlinear beam model to obtain corresponding update dependent variables; and finally, determining the wing section of each beam section, and obtaining a corresponding wing section load, namely a gust load, based on the updated dependent variable of each beam section and the corresponding section constitutive relation matrix.

The present invention relates to a method for efficiently obtaining gust loads of an unmanned aerial vehicle (UAV), belonging to the technical field of aircraft and aeroelasticity. The present invention first determines a nonlinear wing beam model with strain as a variable, and obtains a cross-sectional constitutive relationship matrix of each beam cross section based on the nonlinear wing beam model; secondly, a nonlinear static aeroelastic model is constructed based on an unsteady vortex lattice method, gust disturbances are introduced into the model, and aerodynamic forces corresponding to each beam section are obtained, and then a numerical solution is performed based on the nonlinear beam model to obtain corresponding updated strain quantities; finally, the wing section of each beam section is determined, and the corresponding wing section load, i.e., the gust load, is obtained based on the updated strain quantities of each beam section and the corresponding cross-sectional constitutive relationship matrix.