29 results about "Harmonic vibration" patented technology

The invention relates to the technical field of maglev motor dynamics and control, and discloses a bearingless asynchronous motor multi-frequency harmonic vibration cooperative suppression method, which comprises the following steps: acquiring radial displacement signals and mechanical angular velocity of a rotor in an x axis and a y axis under a stator fixed coordinate system, and stacking double-axis displacement signals into an observation vector; calculating a weighting coefficient of the normalized residual error through a Huber robust cost function, and outputting the amplitude, the phase and the confidence of each order of harmonic wave; estimating the total disturbance of the system by using a linear extended state observer with harmonic energy injection, wherein the total disturbance is obtained by weighted summation according to the confidence, order and mechanical angular velocity of each order of harmonic; calculating a feedback control force according to the total disturbance estimated value, and superposing the feedforward compensation force and the feedback control force to generate a total suspension force instruction; and according to the total suspension force instruction, inversely calculating a suspension winding current reference value and outputting a control instruction. According to the invention, a mutually complementary cooperative suppression mechanism is formed, and the suppression precision of multi-frequency vibration is improved.

The invention relates to the technical field of unmanned aerial vehicle nondestructive testing, and discloses an unmanned aerial vehicle precision part rapid detection system based on multi-sensor fusion. Low-frequency harmonic vibration excitation is applied through a micro vibration excitation module, and a phase offset auxiliary harmonic signal is generated in combination with a multi-harmonic phase synchronous modulation module; and the defect response of the precision part is amplified. The multi-sensor array synchronously collects vibration, optical and thermal response data, and data calibration is carried out through the sensor array self-calibration network. And the defect pattern library pre-matching engine matches the current detection data with the historical defect pattern. And the fusion processing unit performs weighted fusion on the multi-modal detection data, adjusts detection parameters according to a detection result through a closed-loop feedback loop, and triggers iterative detection. According to the invention, low-frequency harmonic vibration excitation is applied through the micro vibration excitation module, and the multi-harmonic phase synchronous modulation module is combined to superpose auxiliary harmonic signals of phase deviation, so that the identification capability of micro defects is improved.

The application discloses a centrifugal fan impeller, a centrifugal fan and a bionic winglet design method, which comprises an impeller body and a blade end winglet, a plurality of blade end winglets are fixedly arranged at one end of the impeller body and are arranged into a circular ring along the circumference of the impeller body; the blade end winglets are gradually increased or decreased along the axial length of the impeller body in sequence along the circumference of the impeller body to form a wave-shaped structure; on the one hand, the bionic wave-shaped distributed blade end winglet structure can straighten the airflow, inhibit the generation and development of vortexes and further reduce vortex noise; on the other hand, the blade end winglet structure with different length distribution characteristics can break the periodic frequency characteristics of the noise source, inhibit the noise peak and effectively inhibit harmonic vibration noise; on the third hand, the blade end winglet can further work on the low-speed and low-pressure airflow, inhibit the gas backflow leakage and the airflow hindering effect at the inlet, and further increase the outlet air pressure and air volume of the fan.

This invention relates to the field of aerospace control technology, and particularly to a method for canceling micro-vibrations of a magnetically levitated CMG group based on rotor imbalance adjustment. The method includes: establishing models of the unbalanced forces and torques of each magnetically levitated rotor; establishing a dynamic synthesis model of the CMG group; establishing the celestial attitude dynamics equations based on the dynamic synthesis model and Euler equations; establishing a CMG group control model; constructing an objective function using the CMG group control model and the celestial attitude dynamics equations; establishing a current control model between the power and current of the rotor's radial translation and radial rotation; establishing the dynamic rotation equations of the high-speed rotor's radial translation and radial rotation; and determining the output current based on the dynamic rotation equations and the control model to adjust the rotor's imbalance and phase, thereby canceling the harmonic vibrations of the magnetically levitated CMG rotor.

A tip-enhanced spectroscopy may include a substrate on which liquid containing an analyte is to be positioned, a tip extending from a fixed end to a free end adjacent to a location for the analyte, and a vibration source configured to harmonically vibrate the tip based on a preset natural frequency. The preset natural frequency may be a natural frequency of a tuning fork.

This invention discloses a semi-analytical method and system for calculating the stiffness and damping coefficients of foil gas dynamic bearings, relating to the field of air conditioning and clothing temperature control technology. It aims to address the shortcomings of traditional Reynolds equation methods in terms of accuracy and universality, as well as the low computational efficiency and mesh distortion issues of existing CFD methods. The method includes: constructing a fluid-structure interaction (FSI) computational model to calculate and obtain the static equilibrium position of the journal; applying an eccentricity perturbation at the static equilibrium position and performing an additional steady-state FSI calculation to obtain the four stiffness coefficients of the foil bearing using a first set of analytical formulas; applying small-amplitude simple harmonic vibrations along the x and y directions to the journal and performing two transient FSI calculations to obtain the four damping coefficients of the foil bearing using a second set of analytical formulas. This invention combines high accuracy and high computational efficiency, providing an efficient and reliable analytical tool for evaluating the dynamic characteristics of foil bearings and designing the stability of the rotor systems they support.

1. Name of the design product: unmanned aerial vehicle holder (self-adaptive harmonic vibration). 2. Use of the design product: used for assisting the flight and shooting of unmanned aerial vehicle. 3. Design points of the design product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

The invention relates to the technical field of vehicles, for example, relates to a prediction method and device for beat vibration of an automobile steering wheel and a computer readable storage medium. The prediction method comprises the steps that the upper limit target value X1 of steering wheel vibration caused by engine excitation is set to be equal to (A1, omega1), the upper limit target value X2 of steering wheel vibration caused by fan excitation is set to be equal to (A2, omega2), A is the vibration amplitude, and omega is the vibration angular frequency; taking the X1 and the X2 as two simple harmonic vibration inputs, carrying out waveform superposition in simulation software, and synthesizing into a predicted beat vibration time domain signal X (t); exporting the beat vibration time domain signal X (t) as a time domain driving file in a preset format at a set sampling frequency and duration; inputting the time domain driving file into a vibration exciter of a built steering system vibration excitation rack so as to drive a steering wheel to generate vibration; and performing beat vibration data analysis based on the vibration signal of the steering wheel to obtain a beat vibration prediction result. Before a sample vehicle is manufactured, the beat vibration problem is intervened in advance, and expensive rectification in the later real vehicle stage is avoided.

The application discloses a single-press trigger type manual power generation module, and relates to the field of power generation devices, which comprises a magnetic circuit assembly and a swing assembly arranged coaxially, wherein a permanent magnet on the swing assembly and the magnetic circuit assembly form a variable magnetic circuit, and a balance assembly is further arranged on the balance wheel; the balance assembly is used for accurately configuring the rotational inertia and the gravity center of the swing assembly, so that the balance wheel can perform simple harmonic vibration at a fixed frequency and a decay law after each pressing, and the stability of output electric energy is ensured; meanwhile, the balance assembly is used for balancing the gravity distribution on the balance wheel, so that the "equivalent gravity center" of the balance wheel coincides with the axis of the rotating shaft; when the balance wheel swings, the operating force and the reset element are only used for overcoming the friction between components, so that the operating force felt by the operator is basically unchanged in different spatial postures, and the operation feeling of the operator is improved. The application further discloses a self-powered device using the power generation module, and the self-powered device does not need any external power supply, and is maintenance-free and wireless.

This invention discloses an active vibration control system and method for tiltrotor aircraft wings, comprising: an actuator assembly consisting of piezoelectric laminated actuators symmetrically arranged within the wing; acceleration sensors, including a wing acceleration sensor located at the outer end of the wing and a fuselage acceleration sensor located in the cockpit; and an adaptive control unit for acquiring sensor signals and outputting control commands. A dual-loop control and flight state tracking strategy is employed: the first control loop implements dynamic characteristic control for the wing-rotor system to suppress transient responses; the second control loop implements steady-state response control for the airframe structure to suppress steady-state harmonic vibrations at the rotor pass frequency and its integer multiples. The flight mode is determined based on the rotor speed and nacelle tilt angle, and the weights of the dual-loop control are dynamically adjusted. This invention achieves adaptive vibration suppression of the tiltrotor aircraft throughout its entire flight envelope, balancing transient and steady-state response control, improving flight quality and extending the lifespan of critical equipment.

A cleaning and caring appliance and a transducing apparatus thereof. A transducer includes a transducer frame and magnets attached to the transducer frame, an elastic assembly and a drive shaft, the elastic assembly includes a transmission arm and an elastic piece held by the transmission arm, and the transmission arm is fixedly connected to the drive shaft, the elastic piece has an outer edge and an inner edges, corresponding to a holding portion of the transmission arm, a recess is formed on the transmission arm, and a recess depth D of the recess is greater than a first fixed coupling width B1 from a bottom surface of the recess and a longitudinal axis. The solution avoids the suppression of a harmonic vibration rotation angle by damping during a harmonic motion, allowing a cleaning assembly such as a brush head to have a larger rotation angle and improving the mechanical efficiency.

The application discloses a kind of welded structure harmonic response structural stress fatigue life prediction method, comprising the following steps: step 1: build the finite element model of welded structure containing weld;Step 2: using unit external load to the finite element model of welded structure harmonic sweep frequency obtains node response displacement;Step 3: according to external load coefficient obtains the unit stiffness matrix and node displacement under external load, as follows: step 4: calculate the simple harmonic response structural stress and equivalent structural stress of structure.The welded structure harmonic response structural stress fatigue life prediction method of the application: (1) compared with traditional quasi-static method, can solve the problem that quasi-static method cannot be carried out vibration fatigue evaluation, (2) compared with frequency domain structural stress method, can solve the problem that frequency domain structural stress method cannot evaluate simple harmonic vibration fatigue, (3) compared with traditional transient structural stress method, the method of the application is more efficient, and the result error is very small.

The invention discloses a micro-vibration adjusting bionic gripper, and belongs to the field of bionic grippers. The device is composed of a main body structure, a tail end assembly structure and an adhesion structure. The tail end assembly structure is connected with the main body structure through the fixed shell; the main body structure comprises a lower shell, a gear motor, a lead screw, an upper shell, a fixing bolt, a bearing, a fixing shell and a connecting rod. And the gear motor is connected with the screw rod to provide reciprocating power, so that the screw rod can linearly move on the fixed guide rail. The tail end assembly structure comprises a connecting rod, a lower connecting rod, a first torsion spring, a second torsion spring, a bionic adhesion structure, a bearing structure and a simple harmonic vibration system. The tail end assembly structure converts the reciprocating linear motion of the lead screw into plane circular motion through mechanical conversion, and therefore the whole device is driven to carry out expected function operation. By introducing micro vibration, the bionic gripper can enhance the surface energy, and has the advantages of lossless gripping, high precision, high adaptability, convenience in operation and the like.

The invention discloses a simple harmonic vibration analysis method based on a modal superposition method, and the method comprises the steps: carrying out the modal analysis of a three-dimensional model of equipment, and obtaining a solution of the modal space of the equipment; a periodic load is obtained, the previous solution of the modal space is selected as the solution of the displacement response of the system in the physical space, the system motion equation under the simple harmonic vibration after coordinate transformation is solved, and a frequency response curve of the equipment structure is obtained; whether the maximum deformation value of the equipment structure under the action of the corresponding periodic load is smaller than an allowable value or not is analyzed by combining the frequency response curve of the equipment structure, and if yes, it is verified that the equipment design meets the requirement; otherwise, verifying that the equipment design does not meet the design requirement, performing reinforcement design on the part with weak structural strength, and repeating the steps until the equipment design meets the requirement. The method ensures that the use of the equipment is not influenced when the equipment is subjected to specified periodic load, and is used for improving the product design efficiency and shortening the equipment design period.

The invention provides a method for reducing quenching residual stress of wear-resistant steel. The method comprises the following steps: sequentially carrying out subzero treatment, aging treatment, vibration aging treatment and spraying treatment on quenched wear-resistant steel, the vibration aging treatment comprises the operation steps that a vibration exciter is installed at the position 20-50 cm away from the center of the wear-resistant steel, and frequency spectrum harmonic vibration aging treatment is conducted for 20-40 min under the conditions that the resonant frequency is 100-180 Hz, the exciting force is 4-10 kN and the rotating speed is 6000-10800 rpm; the spraying treatment adopts a multi-stage heating method; the spraying treatment adopts a multi-stage heating method. According to the method, deep cooling, aging, vibration aging, spraying and other processes are combined for treatment, vibration exciters are arranged at reasonable positions, and multi-stage heating is conducted through spraying water, so that the residual stress in the wear-resistant steel can be effectively reduced, the dimensional stability of the steel can be guaranteed, and the steel is not prone to cracking and deformation in the subsequent machining process.

The utility model provides a damping and forced simple harmonic vibration experiment device based on digitization, which comprises a base, double supporting rods and an oscillation device, the base is perpendicular to the double supporting rods and is detachably fixed with the double supporting rods, a short supporting rod is transversely arranged at the top of the double supporting rods, a first rotation sensor is arranged on one of the double supporting rods, and a second rotation sensor is arranged on the other of the double supporting rods. The other supporting rod is provided with a second rotation sensor and an oscillation device from top to bottom, the oscillation device is connected with one end of a thin rope, and the other end of the thin rope is sequentially connected with the second rotation sensor, a first spring, the first rotation sensor and a second spring and is finally fixed to the end, close to one side of the rotation sensor, of the short supporting rod; the first rotation sensor, the second rotation sensor and the oscillation device are connected with a control center. The experimental device aims at achieving the objectives that the experimental phenomenon is concrete, the device has an obvious vibration phenomenon, and the device is provided with a visual damping adjusting device and an adjustable continuous periodic external force providing device. And meanwhile, software data is visualized.

A fluid valve and a fluid supply system comprising the fluid valve. The fluid valve comprises: a valve body; an elastic device; a valve core slidably arranged on the valve body in a fluid flowing direction, wherein the elastic device is arranged between the valve core and the valve body, a pressure-receiving surface is formed on a liquid inlet side of the valve core, and the force on the pressure-receiving surface is opposite to the force exerted by the elastic device on the valve core, and when the valve core slides relative to the valve body in a direction in which a valve port formed between the valve core and the valve body becomes smaller, the elastic deformation amount of the elastic device increases; and a sound monitoring device used for detecting vibration sound generated by the valve core operating within a predetermined flow rate range. The valve core and the elastic device form a simple harmonic vibration. When the flow rate reaches a preset flow rate, the valve core generates corresponding vibration sound, and the vibration sound is detected by the sound monitoring device, thereby achieving a flow monitoring effect, and effectively solving the problem of poor flow rate monitoring performance of existing fluid valves.

This invention belongs to the field of visual light source impact testing technology and discloses a visual light source durability testing device. The device includes three circumferentially distributed testing platforms. An adjustment unit is located on one side of each testing platform, and a vibration unit and an impact unit are respectively located on either side of the adjustment unit. The vibration unit drives the angle cylinder to rotate and displaces the end rod through pitch gears meshing with open gears of different opening radii, changing the compressibility of the return spring to achieve multi-frequency vibration simulation. The compressed return spring can enter the non-harmonic vibration range. The impact unit achieves multi-dimensional impact through planetary gears and eccentric gears combined with a two-axis linkage mechanism. The adjustment unit achieves synchronous switching between multiple workstations through gear transmission and gear belt linkage. This invention solves the problems of existing testing equipment having a single vibration frequency band, unrealistic simulated environment, and insufficient impact dimensions. It can comprehensively assess the structural stability of visual light sources, improve the realism and efficiency of testing, and is suitable for batch testing scenarios.

The invention discloses a damping-adjustable railway vehicle vertical vibration simulation system and method, and relates to the technical field of railway vehicle dynamics experiment equipment. Real wheel track excitation can be highly simulated, and accurate and controllable testing can be carried out on the vertical dynamic response of the suspension system. The system comprises a supporting module, a weight module and at least one excitation generation module, the supporting module comprises a bottom plate; the weight module comprises a weight supporting seat weight; the excitation generation module comprises a base, a motor, an eccentric wheel, a transmission frame, a spring and a damper; the base is connected to the bottom plate; the fixed end of the motor is connected to the base, and the output end is connected with the eccentric wheel; two ends of the transmission frame are respectively connected with the axle of the eccentric wheel, the spring and the damper; the transmission frame can convert the rotary motion of the eccentric wheel into vertical simple harmonic vibration; the rigidity of the spring and the damping coefficient of the damper are adjustable; the weight supporting seat is connected to the spring and the damper; the invention further discloses a simulation method based on the system.

The application relates to the technical field of electric transmission and control, and discloses a bearing-free composite rotor cage asynchronous motor multi-frequency harmonic vibration compensation control method and system. The bearing-free composite rotor cage asynchronous motor multi-frequency harmonic vibration compensation control method comprises the following steps: collecting a bearing-free composite rotor cage asynchronous motor rotor radial displacement signal; constructing an input vector containing a direct current item and multi-order cosine and sine components; using an adaptive linear neuron algorithm to decompose the signal and extract direct current, a fundamental wave and each order harmonic component; using an extended linear active disturbance rejection controller to observe total disturbance containing low-frequency slow change and harmonic disturbance; calculating compensation force according to the harmonic component; superimposing the compensation force and basic suspension force to form a total control force instruction; driving a suspension winding through force-current conversion; and inhibiting multi-frequency harmonic vibration. The application effectively improves harmonic separation precision and disturbance suppression capacity, and provides a reliable theoretical guarantee for high-speed bearing-free motor control.

An operator device for a capacitive sensor. The device includes an electronic device, by means of which an actual gap distance between the seismic mass and the at least one electrode and / or an actual variable for a sensitivity of the capacitive sensor can be determined, taking into account at least a first constant voltage, a first natural frequency of a first harmonic vibration of a seismic mass along a spatial direction, centrally intersecting the seismic mass and the at least one electrode, when the first constant voltage is applied between the seismic mass and the at least one electrode, a second constant voltage and a second natural frequency of a second harmonic vibration of the seismic mass along the spatial direction, centrally intersecting the seismic mass and the at least one electrode, when the second constant voltage is applied between the seismic mass and the at least one electrode.

The invention provides a nanoscale resolution vector electric field imaging device, and relates to the field of quantum imaging. The vector electric field imaging device comprises a quartz tuning fork which is movably arranged relative to the upper surface of a to-be-tested sample and is configured to perform simple harmonic vibration along a first direction; the probe is fixedly arranged on the lower surface of the quartz tuning fork and is configured to perform simple harmonic vibration along the first direction along with the quartz tuning fork, and an NV color center is carried in the probe; the microwave radiation module is configured to emit microwave pulses to the probe when the probe is located at the highest point or the lowest point of simple harmonic vibration, so that the NV color center accumulates phase information; the fluorescence acquisition module is configured to send laser to the probe and acquire fluorescence excited by the NV color center to obtain a fluorescence signal; and a processing module configured to perform vector electric field imaging based on the fluorescence signal.

The utility model discloses a kind of multi-resonance broadband direct-drive vibration damper, including shell, fundamental frequency vibration damper component and harmonic vibration damper component, fundamental frequency vibration damper component includes two identical fundamental frequency vibration damper units, harmonic vibration damper component includes two identical harmonic vibration damper units, fundamental frequency vibration damper unit and harmonic vibration damper unit respectively include eccentric mass, inner casing, outer casing and frameless motor, inner casing and outer casing are respectively sleeved on the protruding shaft of eccentric mass both sides, bearing is equipped between inner casing, outer casing and eccentric mass shaft, frameless motor is fixedly installed in outer casing, frameless motor rotor is fixedly connected with eccentric mass shaft, the two fundamental frequency vibration damper units of the composition fundamental frequency vibration damper component are coaxial and the inner casing side is arranged oppositely, the two harmonic vibration damper units of the composition harmonic vibration damper component are coaxial and the inner casing side is arranged oppositely, fundamental frequency vibration damper component and harmonic vibration damper component are installed in shell and coaxial arrangement.

The invention discloses a linear friction welding heat input modeling analysis method and system based on vibration parameters, and the method comprises the following steps: building a time-varying displacement function of a welding interface according to the amplitude and frequency based on the simple harmonic vibration characteristic of a linear friction welding machine, and obtaining the instantaneous speed and statistical characteristic value of the welding interface; defining the instantaneous friction power of the welding interface, and introducing a non-linear friction coefficient which is constructed as a dynamic function about the instantaneous temperature of the interface and the absolute value of the instantaneous speed; based on the instantaneous friction power, introducing heat conversion efficiency and deducting plastic energy consumption for material plastic deformation, establishing a net heat power expression per unit time, and integrating time to obtain total heat input; and an equivalent thermal damping power model is constructed, the average thermal damping power is made to be equal to the average net thermal power, and an equivalent thermal damping coefficient representing the heat energy dissipation capacity of the welding system is obtained. According to the method, the process parameter optimization efficiency and the active control capability of the welding process can be improved.

The application relates to the technical field of rotor aerodynamics and computational fluid dynamics, and discloses a CFD simulation method for rotor disc chamfering, which comprises the following steps: obtaining a damped flapping dynamics equation according to a flapping dynamics equation of a blade; converting the damped flapping dynamics equation into a second-order ordinary differential equation; obtaining a flapping dynamics response under ideal simple harmonic vibration excitation according to the second-order ordinary differential equation; converting the second-order ordinary differential equation into a first-order ordinary differential equation group; solving the first-order ordinary differential equation group to obtain a flapping angle of the blade and a first time derivative of the flapping angle; performing fast Fourier transform on the flapping angle to obtain a periodic flapping solution; obtaining an aerodynamic moment of the blade on a flapping hinge through flow field calculation; substituting the aerodynamic moment into the second-order ordinary differential equation; solving the second-order ordinary differential equation to obtain a new flapping angle; and obtaining a final flapping angle according to harmonic components of the flapping angle in each rotation period. The application improves the simulation precision of rotor disc chamfering.

The invention provides a rotor improvement method for a single-shaft turbofan engine, a rotor of the engine is a three-fulcrum rotor supported by a middle fulcrum and two end fulcrums, and the method comprises the steps that a rotor dynamics analysis finite element model is established according to the three-fulcrum rotor, the supporting rigidity of the two end fulcrums is kept in the model, and the middle fulcrum is cancelled; performing critical rotating speed and strain energy analysis on a rotor, identifying dynamic constraint conditions in a working rotating speed range, confirming a variable structure of the single-shaft turbofan engine, performing dynamic characteristic structure parameter sensitivity analysis on the variable structure according to the dynamic constraint conditions, determining sensitive parameters of the variable structure, and performing iterative optimization; and processing and manufacturing the single-shaft turbofan engine according to an optimization result and carrying out a whole machine vibration test until the critical rotating speed and the strain energy of the rotor meet preset rotor dynamic design requirements, and verifying the optimization effect of the dynamic characteristics of the rotor by comparing the change of the fundamental frequency and the multi-frequency vibration magnitude in the vibration spectrum before and after improvement.

The invention relates to the technical field of electrical transmission and control, and discloses a multi-frequency harmonic vibration compensation control method for a bearingless composite rotor cage type asynchronous motor, and the multi-frequency harmonic vibration compensation control method for the bearingless composite rotor cage type asynchronous motor comprises the steps: collecting a rotor radial displacement signal of the bearingless composite rotor cage type asynchronous motor; constructing an input vector containing a direct current item and multi-order cosine and sine components, decomposing a signal by using an adaptive linear neuron algorithm, and extracting direct current, fundamental waves and harmonic components of each order; total disturbance containing low-frequency slow change and harmonic disturbance is observed through an extended linear active disturbance rejection controller, compensation force is calculated according to harmonic components, the compensation force and basic suspension force are superposed to form a total control force instruction, a suspension winding is driven through force-current conversion, and multi-frequency harmonic vibration is restrained; according to the method, the harmonic separation precision and the disturbance suppression capability are effectively improved, and a reliable theoretical guarantee is provided for high-speed bearingless motor control.

The invention relates to the technical field of gear machining, in particular to an ultrasonic-assisted worm grinding wheel grinding tooth surface texture active regulation and control method and device. An initial vector diagram is obtained by simulating the cutting speed of the abrasive particles at the contact point, a corrected vector diagram of the cutting speed of the corrected abrasive particles at the contact point is simulated according to preset amplitude and frequency, the corrected vector diagram is compared with the initial vector diagram, and if irregular parallel textures are displayed in the corrected vector diagram, the abrasive particles in the irregular parallel textures are cut. If yes, the preset amplitude and frequency and the correction vector diagram meet the regulation and control requirements. Simple harmonic vibration with preset amplitude and frequency is introduced in the axial direction of the gear to be machined, the cutting speed of abrasive particles at a contact point is corrected, active regulation and control of ultrasonic-assisted tooth surface textures are completed, the tooth surface textures are adjusted, straight textures generated when a worm grinding wheel grinds teeth are avoided, and therefore the surface quality of the gear is improved; therefore, the technical problem that regular and parallel textures can be generated by an existing grinding machining method is solved.

The invention relates to the technical field of rotor aerodynamics and computational fluid mechanics, and discloses a CFD (computational fluid dynamics) simulation method for rotor disc chamfers, which comprises the following steps of: obtaining a damped flapping kinetic equation according to a flapping kinetic equation of a blade, converting the damped flapping kinetic equation into a second-order ordinary differential equation, and calculating the rotor disc chamfers according to the second-order ordinary differential equation. The flapping dynamics response under ideal simple harmonic vibration excitation is obtained; converting the second-order ordinary differential equation into a first-order ordinary differential equation set, solving the first-order ordinary differential equation set to obtain a flapping angle of the blade and a primary time derivative of the flapping angle, and performing fast Fourier transform on the flapping angle to obtain a periodic flapping solution; according to the method, the aerodynamic torque of the blade to the flapping hinge is obtained through flow field calculation, the aerodynamic torque is substituted into a second-order ordinary differential equation, the second-order ordinary differential equation is solved to obtain a new flapping angle, and the final flapping angle is obtained according to all-order harmonic components of the flapping angle in each rotation period. According to the invention, the precision of simulating the chamfering of the rotor disc is improved.