68 results about "Dynamic Vibration Absorber" patented technology

The invention discloses an integrated rigidity damping inerter self-control type two-stage vibration reduction hydro-pneumatic suspension and a working method in the field of automobiles, a hollow plunger extends into an upper cavity of an oil cylinder, the lower end of the hollow plunger is fixedly connected with a piston, and an upper lifting lug runner is sequentially connected with an inerter pipe, an electric control throttle valve and a large hydro-pneumatic chamber through a first hydraulic oil pipe; a lower lifting lug runner is sequentially connected with a damper and a small oil gas chamber through a second hydraulic oil pipe, a built-in rigidity control valve outer cylinder with the lower end fixedly connected with a piston is arranged in the plunger, an inner cylinder with the upper end sealed and the lower end connected with the lower lifting lug through a spherical hinge is coaxially sleeved with the outer cylinder, and three rows of holes are formed in the side wall of the inner cylinder from bottom to top. Two rows of holes are formed in the side wall of the outer cylinder from bottom to top; the flow direction of oil liquid is changed when the suspension works, a seal does not need to be arranged on a piston, a longer oil through hole is formed in an outer barrel, the safety of the control valve is improved, a wheel dynamic vibration absorber is integrated to an oil cylinder, integration is achieved, an external rigidity control valve is replaced with an internal rigidity control valve, and the size of the whole suspension is reduced.

An actuator for a head-up display, includes a link attached to one end of an aspheric mirror, a driving force transmission including a lead screw to move the link, a driver to allow the lead screw to rotate along the axis of rotation of a motor as the motor is driven, a motor bracket disposed on top of the motor and attached to the driver to support the driver, a top motor mount disposed on the top of the motor, a bottom motor mount disposed on the bottom of the motor, a vibration damping part disposed between the top motor mount and the motor bracket, to absorb vibration from the motor, and a cantilever type dynamic vibration absorber disposed on both ends of the bottom motor mount, to absorb vibration from the motor.

To suppress horizontal vibration of a nuclear pressure vessel during an earthquake, and make a dynamic vibration absorber compact to suppress an installation space of the dynamic vibration absorber, in a nuclear power plant.SOLUTION: An earthquake resistance support device for a nuclear power plant is arranged in a reactor containment vessel, and suppresses horizontal vibration of a reactor pressure vessel supported by a pedestal when an earthquake occurs. The earthquake resistance support device comprises a horizontal beam that is arranged between the reactor containment vessel and the reactor pressure vessel, and the pedestal, and extends in the radial direction of the reactor pressure vessel and the pedestal; and a dynamic vibration absorber installed on the horizontal beam. The dynamic vibration absorber comprises a hollow weight extrapolated to the horizontal beam and movable in an axial direction of the horizontal beam, and a coil spring device that elastically supports the hollow weight in the axial direction of the horizontal beam, to allow the hollow weight to vibrate in the axial direction of the horizontal beam.SELECTED DRAWING: Figure 3

The application discloses an adjustable nonlinear dynamic vibration absorber and system, and has the technical scheme that a tuning mass block is slidably connected to the surface of a support plate, and first scissor structures are rotatably connected between the tuning mass block and the two ends of the support plate; the first scissor structures are provided with second scissor structures and dampers, the second scissor structures and the dampers can drive the first scissor structures to stretch and contract through elastic belts, the second scissor structures are provided with elastic elements for driving the second scissor structures to stretch and contract; the stretching direction of the elastic elements is parallel to the sliding direction of the tuning mass block, and is perpendicular to the damping direction of the dampers, so that the first scissor structures and the second scissor structures can realize vibration absorption through geometric nonlinearity when moving. The stiffness and damping characteristics of the application can be adjusted, and the linear elements can be used to realize nonlinear stiffness, damping and super-low natural frequency, and the problem of Duffing system instability that cannot be eliminated by traditional nonlinear vibration absorbers is solved.

The application discloses a kind of floating plate low height power vibration absorber, including mass, mass both ends are symmetrically arranged first support, first support is mutually perpendicular fixed part and support part, the support part and mass both ends are fixedly connected rubber layer, the bottom surface of mass distance fixed part bottom surface has interval S.The power vibration absorber presented in the application, mass, support and rubber layer are sequentially laminated connection, so that the height of whole power vibration absorber is reduced, and the driving of vehicle is not affected.The thickness of mass can be controlled, and the frequency range of power vibration absorber is adjusted.

The invention discloses a heat distribution pipeline vibration response analysis and vibration reduction control method along with bridge laying, and the method comprises the following steps: S1, building a pipeline vibration analysis model containing fluid flow, external excitation and a thermal expansion effect based on an energy finite element method, and calculating the energy density distribution and energy flow distribution of a pipeline; s2, on the basis of the energy density distribution and the energy flow distribution, identifying damaged and weak parts of the pipeline through predefined damage indexes; s3, designing at least one magnetic damping dynamic vibration absorber based on a fixed-point theory, and determining the mounting position of the magnetic damping dynamic vibration absorber along the pipeline through a multi-objective optimization algorithm; s4, performing thermal stress coupling analysis on the pipeline system added with the magnetic damping dynamic vibration absorber; and S5, the vibration reduction effect is verified through finite element simulation and field tests. Through the pipeline vibration analysis model established based on the energy finite element method, the energy density and the energy flow distribution of the pipeline in the axial direction are accurately calculated, and the propagation path and the concentration area of vibration energy are revealed.

The invention discloses a frequency-adjustable dynamic vibration absorber, and belongs to the technical field of dynamic vibration absorbers, the frequency-adjustable dynamic vibration absorber comprises a fixed support assembly, a plate spring, a mass block, a driving assembly and a sliding clamp, and the fixed support assembly is provided with a plate spring mounting part and a driving assembly mounting part; the middle part of the plate spring is mounted on the plate spring mounting part, and two ends of the plate spring are free ends which are respectively provided with a group of mass blocks; the driving assembly is mounted on the driving assembly mounting part; the area between the middle and the free end of the plate spring is the movement area of the sliding clamps, the two sides of the plate spring are each provided with one movement area, one sliding clamp is arranged in each movement area, the sliding clamps are in sliding connection with the plate spring, and the sliding clamps are in transmission connection with the driving assembly. The vibration absorber is driven by the driving assembly to linearly move in the length direction of the plate spring, the effective working length of the plate spring is changed, the inherent frequency of the plate spring is adjusted, the inherent frequency of the vibration absorber is synchronously matched with the external excitation frequency, and the optimal vibration absorption effect is achieved.

The invention discloses a frequency-adjustable type double-order dynamic vibration absorber, and relates to the field of vibration control, the frequency-adjustable type double-order dynamic vibration absorber comprises a supporting base, a plate spring used for absorbing vibration force is arranged at the top of the supporting base, the plate spring comprises at least three supporting layers and elastic layers located between the adjacent supporting layers, and the supporting layers and the elastic layers are fixed through vulcanization bonding; mass blocks are arranged at the tops of the two ends of the plate spring, absorption seats are arranged at the bottoms of the two ends of the plate spring and located at the mass blocks, and the mass blocks longitudinally move at the tops of the absorption seats; the adjusting structure comprises a body cover plate arranged at the top of the plate spring relative to the supporting base, limiting beams used for limiting movement of the mass block are arranged on the two sides of the body cover plate, adjusting clamping plates are movably arranged in the middles of the limiting beams, and the adjusting clamping plates drive the mass block to transversely move and adjust the vibration frequency of the plate spring. Movement of the mass block is flexibly adjusted to enable vibration frequencies to be matched, and meanwhile double vibration absorption is suitable for medium-frequency and high-frequency vibration absorption work.

The utility model relates to a multifunctional hybrid dynamic vibration absorption device which comprises a spring mass system, a magnetic force adjusting system and a passive dynamic vibration absorber part, and the passive dynamic vibration absorber part is of a cantilever beam structure. A spring mass system and a magnetic force adjusting system are installed on the cantilever beam structure. An adjusting mass block can be additionally arranged on the basic mass block, so that mass adjustment is realized. The elastic rod is of a cantilever beam structure, the position of the main mass can be adjusted through the adjusting screw, and therefore fine adjustment of rigidity is achieved. According to the utility model, an independent magnetic force adjusting system composed of the magnetic circuit mass block, the driving winding and the permanent magnet is provided, after the system is electrified, electromagnetic force can be generated in the vibration direction, and active control can be realized by matching with a sensor and a control system.

The invention relates to a dynamic vibration absorber based on acoustic black hole and particle damping coupling, which comprises an acoustic black hole structure and a cavity shell, the acoustic black hole structure comprises a thickness gradual change area and a uniform thickness area, and the thickness of the thickness gradual change area is gradually reduced from the maximum thickness end to the minimum thickness end; the minimum thickness end of the uniform thickness area and the minimum thickness end of the thickness gradual change area are connected into a whole, and a damping covering layer is arranged at the joint of the thickness gradual change area and the uniform thickness area. The cavity shell covers the acoustic black hole structure, a cavity is formed in the cavity shell, partition plates are arranged in the cavity at intervals, the adjacent partition plates divide the cavity into sub-cavities which are not communicated with one another, the sub-cavities are filled with free particles, and the height of the partition plates in the cavity is matched with the outer contour of the acoustic black hole structure in a coordinated mode. The gap between the top of each partition plate and the acoustic black hole structure is smaller than the diameter of a free particle. By means of the synergistic effect of acoustic black hole energy gathering and particle damping energy dissipation, the overall vibration reduction efficiency is improved, and the effective frequency band is widened.

The present disclosure relates to a dynamic vibration absorber for reducing vibrations of a component installed on a vehicle frame member. The dynamic vibration absorber has an air tank, an elastic member comprising a first spring member, and a gripping device attached to the elastic member and configured to grip the air tank. The gripping device has a first gripping member having a first gripping space to embrace at least a portion of the air tank. The first gripping member is configured such that when the at least portion of the air tank is fitted to the first gripping space, a first gripping force is applied to the least portion of air tank.

The utility model relates to a dynamic vibration absorber for an OCT (optical coherence tomography) appearance detection mechanism for a lens, which is provided with a vibration absorption base and a mass block, a vibration absorption screw is erected on the vibration absorption base, a through groove is arranged on the mass block, the mass block is slidably arranged on the vibration absorption base through matching of the vibration absorption screw and the through groove, and vibration absorption gaskets are arranged on two sides of the mass block. Each vibration absorption gasket is arranged on the vibration absorption screw rod in a sleeving manner, a vibration absorption spring is arranged between each vibration absorption gasket and the mass block, each vibration absorption spring is arranged on the vibration absorption screw rod in a sleeving manner, the two ends of each vibration absorption spring act on the mass block and the vibration absorption gasket respectively, and an adjusting nut is arranged on the vibration absorption screw rod. The two vibration absorption gaskets are arranged between the two oppositely-arranged adjusting nuts, the vibration absorption gaskets are arranged between the vibration absorption springs and the adjusting nuts on the corresponding sides, and after the mass block is vibrated on the vibration absorption base, the vibration absorption springs reversely apply force to the mass block through continuous force application of the vibration absorption springs. The device is ingenious in structure, convenient and practical.

The invention provides a dynamic vibration absorber suitable for a complex vibration environment and a vibration absorption method, and the dynamic vibration absorber suitable for the complex vibration environment comprises a base which is provided with a boss; a first cantilever beam type spring piece and a second cantilever beam type spring piece are arranged on the two sides of the boss in an outward extending mode. A first mass block assembly is arranged at the end, away from the boss, of the first cantilever beam type spring piece, and a second mass block assembly is arranged at the end, away from the boss, of the second cantilever beam type spring piece. Compared with the prior art, at least one technical scheme adopted by the invention can achieve the beneficial effects that one dynamic vibration absorber can realize structural vibration reduction in a plurality of excitation frequency environments, and the models and the number of the vibration absorbers are reduced, so that the development expenditure and the installation workload are reduced.

The utility model belongs to the technical field of dynamic vibration absorbers, and particularly relates to a double-layer damping dynamic vibration absorber based on a condensate pump, which comprises a water pump assembly and a damping vibration absorption assembly, the water pump assembly comprises a water pump body and a water pump end cover, the water pump end cover is arranged on the water pump body, and the damping vibration absorption assembly is arranged on the water pump body. The damping vibration absorption assembly is arranged on the water pump end cover, the damping vibration absorption assembly comprises a base, a damping vibration attenuation mechanism and a balance weight part, the base is detachably arranged on the water pump end cover, the damping vibration attenuation mechanism is arranged on the base, and the balance weight part is arranged on the damping vibration attenuation mechanism. Therefore, interface stress concentration caused by a traditional embedding process is avoided through the layered and stacked double-layer damping structure, local stress is effectively dispersed through coupling connection of the balance weight piece and the upper damping vibration attenuation component, broadband vibration suppression of the condensate pump is achieved, and meanwhile structural reliability and installation convenience are improved.

The application discloses a pipeline magnetic force damping dynamic vibration absorber, which comprises a shell, a clamp, a vibration absorbing mechanism and a magnetic force damping mechanism arranged in the shell, the vibration absorbing mechanism comprises a sliding rod fixed on the shell and a mass block slidingly arranged on the sliding rod, the magnetic force damping mechanism comprises a conductor plate arranged on the mass block and a magnet fixed on the shell, and the magnet is arranged correspondingly to the conductor plate. The material of the conductor plate is a metal with good conductivity, preferably copper. The pipeline magnetic force damping dynamic vibration absorber has the advantages that it does not need to be rooted in other structures except the pipeline, and has low requirement on installation space; and the magnetic force damping structure is a non-contact structure, so that the damping effect is not attenuated or the service life is not shortened due to friction and other factors, compared with other contact damping structures.

This invention belongs to the field of vibration absorption for nuclear power plant pipelines, specifically relating to a wide-frequency-range rubber spring dynamic vibration absorber for nuclear power pipeline vibration reduction. The absorber includes: a fixed frame and vibration-absorbing blocks. The fixed frame has a circular structure, with two sets of fixed frames arranged parallel and symmetrically. The vibration-absorbing blocks are located between the two sets of fixed frames, and a plurality of vibration-absorbing blocks are evenly distributed along the circumference of the fixed frames. Both ends of the vibration-absorbing blocks are detachably connected to the two sets of fixed frames, with a certain gap between the ends of the vibration-absorbing blocks and the fixed frames. The fixed frame is securely connected to the pipeline. The fixed frame clamps the pipeline, bears the vibration of the pipeline, and transmits the vibration to the vibration-absorbing blocks, which absorb the vibration and suppress the pipeline vibration. This invention's vibration absorber has a simple structure, is easy to assemble and disassemble, and can effectively suppress vibrations from all directions of the pipeline.

This invention relates to the field of intelligent manufacturing technology, and more particularly to a design method and system for a dynamic vibration absorber in the field of vibration control. The invention establishes a two-degree-of-freedom nonlinear dynamic vibration absorber system, and optimizes a passive mechanical network of biquadratic optimal form based on the linearized model fitted from this system model. Based on the system model combined with the passive mechanical network, a fractional-order integral sliding mode controller based on a disturbance observer is designed. The fractional-order switching disturbance observer can estimate and supplement various unknown factors in the system, and outputs the optimal control force through fractional-order integral sliding mode control. Finally, a semi-active capacitive control law is designed, and a suboptimal control force is obtained through force tracking to achieve vibration reduction control. This invention effectively improves the control accuracy of the dynamic vibration absorber.

This invention discloses a method, apparatus, device, and medium for evaluating vibration absorption in a vehicle suspension system. The method includes: before installing a dynamic vibration absorber in the suspension system, acquiring a first vibration value detected at a second position point when a first position point in the suspension system vibrates; determining a first transmission curve based on the first vibration value; after installing the dynamic vibration absorber in the suspension system, acquiring a second vibration value detected at the second position point when the first position point vibrates; determining a second transmission curve based on the second vibration value; and evaluating the vibration absorption effect of the suspension system based on the first and second transmission curves to obtain an evaluation result. By using the transmission curve between the first and second position points of the suspension system to guide the design of the dynamic vibration absorber, the matching of the dynamic vibration absorber's operating frequency band with the problematic frequency band inside the vehicle is improved, thereby increasing the accuracy of determining the center frequency band of the dynamic vibration absorber and effectively improving the vibration absorption effect of the suspension system.

The invention discloses a chiral lattice sandwich structure with wide and low frequency vibration damping characteristics, which comprises a plurality of lattice sandwich units, each lattice sandwich unit comprises an upper panel, a lower panel and a dynamic vibration absorber, a plurality of chiral support columns are arranged between the upper panel and the lower panel, and the dynamic vibration absorber is arranged between the upper panel and the lower panel. The chiral supporting columns are obliquely arranged, the heads and the tails of the chiral supporting columns are connected with the upper-layer panel and the lower-layer panel respectively, a middle chiral crystal lattice core layer is defined by the chiral supporting columns, miniature chiral crystal lattices are arranged in the chiral crystal lattice core layer, and the dynamic vibration absorbers are fixedly connected to the miniature chiral crystal lattices. According to the invention, a dynamic coupling effect is realized, so that a broadband vibration attenuation effect is obtained.

The utility model discloses a rear overhang traction arm with a dynamic vibration absorber, which comprises a rear overhang traction arm body (1), a first connecting end (2) is a U-shaped notch, a second connecting end (3) is provided with a rubber bushing (4), and the rubber bushing (4) is fixed on the second connecting end (3) through a bolt and nut assembly. The rear suspension traction arm is characterized in that a dynamic vibration absorber (5) is arranged at any position of the rear suspension traction arm body (1), the installation position of the dynamic vibration absorber (5) and the installation position of the rubber bushing (4) are located on the same plane, and the vibration absorption direction of the dynamic vibration absorber (5) is consistent with the height direction of the rear suspension traction arm body (1). According to the rear suspension traction arm, the dynamic vibration absorber is additionally arranged on the metal plate body, co-vibration energy of the traction arm is transferred to the dynamic vibration absorber, and vibration is absorbed.

The application discloses a frequency and damping independently adjustable dynamic vibration absorber and a design method thereof, and relates to the technical field of semi-active control of structural vibration. The structure is composed of an inertial actuator and a shunt circuit. The shunt circuit comprises a negative inductance and negative resistance compensation circuit and an inductance-resistance-capacitance parallel circuit. Two wiring ends of a voice coil of the inertial actuator are connected with the shunt circuit to form a complete loop. The independent adjustment of the inherent frequency and the damping of the inertial actuator can be realized by adjusting the parameters of the shunt circuit. Therefore, the dynamic vibration absorber has the characteristics of controlling vibration of any disturbance frequency. The application does not need any mechanical driving device, and the inherent frequency and the damping adjustment of the dynamic vibration absorber are independent of each other.

The application discloses a design and a preparation method of an acoustic black hole dynamic vibration absorber with density power law variation, designs and prepares a density power law acoustic black hole and a dynamic vibration absorber with deep subwavelength size based on the acoustic black hole principle; the density power law acoustic black hole unit is designed in a discrete manner so as to determine the size parameters and the material parameters of each part; the high-density tungsten particles uniformly dispersed in a polymer are used as raw materials to prepare the variable-density material required by the density power law acoustic black hole structure; the density power law acoustic black hole unit is prepared by using the prepared variable-density material according to the size parameters and the material parameters of each part of the density power law acoustic black hole structure, the acoustic black hole unit is connected to a main structure through a connector, and the density power law acoustic black hole dynamic vibration absorber is obtained. Compared with a traditional acoustic black hole dynamic vibration absorber with the same geometric length, the density power law acoustic black hole dynamic vibration absorber can realize low-frequency super-wideband damping enhancement and dynamic vibration absorption.

The application provides a combined dynamic vibration absorber based on a leaf spring frequency modulation, comprising a plurality of vibration absorbing units which are respectively fixedly installed or fixedly installed after being freely combined on a vibration platform. Each vibration absorbing unit comprises a shell, a leaf spring and a vibrator assembly. The shell has a containing cavity. The leaf spring is arranged in the containing cavity, and two ends of the leaf spring are connected with the shell. The vibrator assembly is arranged in the containing cavity and is fixed on the leaf spring, and the vibrator assembly has a vibration compensation space for the leaf spring to penetrate. The combined dynamic vibration absorber based on the leaf spring frequency modulation can adjust the inherent frequency of the vibration absorber, has self-adaptability to the vibration intensity, widens the vibration reduction frequency band, and the unitized combined design can effectively adapt to a complex vibration environment with various frequencies and ensure the vibration reduction effect.

The present application relates to the technical field of mechanical vibration and damping and noise reduction, and particularly relates to a three-dimensional dynamic vibration absorber based on a parallel mechanism, which comprises a fixed frame, a vibration-absorbing mass, and three identical branch kinematic chains; the fixed frame comprises a lower bottom plate, an upper top plate, and a guide rod; the guide rod is installed between the lower bottom plate and the upper top plate; the branch kinematic chain is sleeved on the guide rod; the vibration-absorbing mass is installed between the lower bottom plate and the upper top plate; and the branch kinematic chain is connected with the vibration-absorbing mass through a spherical hinge. The present application can effectively suppress multi-dimensional line spectrum vibration of a dynamic mechanical device and overcome the problems of large size and large additional mass of existing multi-dimensional dynamic vibration absorbers.

The application discloses a metamaterial concrete beam with a local resonance property, which is composed of a plurality of unit cells arranged periodically; the unit cell comprises a concrete pipe and a dynamic vibration absorber arranged in the concrete pipe in a radial direction of the concrete pipe; the dynamic vibration absorber comprises a metal heavy core and a soft coating wrapped on the surface of the metal heavy core and attached to the inner wall of the concrete pipe; and the plurality of unit cells are spliced by the two ends of the concrete pipe. The application is aimed at the fact that a phononic crystal metamaterial is limited by a structure size, is difficult to form a high-frequency band gap in a limited size, and is based on a local resonance mechanism to design a metamaterial concrete beam structure which can form a resonance band gap in an engineering structure of a limited size, so as to attenuate input waves whose wavelengths are not in the same order of magnitude as the size of the beam unit cell, thereby playing a vibration reduction role in actual engineering applications.

The application discloses a design method of a modulus power-law acoustic black hole dynamic vibration absorber, and designs an acoustic black hole structure with the modulus of elasticity of material changing in a power-law along the length direction of the structure as a dynamic vibration absorber device based on the acoustic black hole principle. Compared with the traditional acoustic black hole dynamic vibration absorber with the same mass and the same length and width and the geometric thickness changing in a power-law, the acoustic black hole dynamic vibration absorber with the modulus of elasticity changing in a power-law can not only effectively reduce the threshold frequency of damping enhancement, but also effectively improve the structural modal loss factor, so as to realize excellent low-frequency super-wideband damping enhancement and dynamic vibration absorption effect.

The present disclosure relates to a dynamic vibration absorber (10) for reducing vibrations of a component (20) installed on a vehicle frame member (110). The dynamic vibration absorber (10) comprises: - an air tank (30), - an elastic member (40) comprising a first spring member (40-1), and - a gripping device (50) attached to the elastic member (40) and configured to grip the air tank (30), - wherein the gripping device (50) comprises a first gripping member (50-1) having a first gripping space (51-1) to embrace at least a portion (31-1) of the air tank (30), the first gripping member (50-1) being configured such that when the at least portion (31-1) of the air tank (30) is fitted to the first gripping space (51-1), a first gripping force (F1) is applied to the least portion (31-1) of air tank (30)

A dynamic vibration absorber is provided that allows the elastic member on the base member to be replaced and allows the elastic member to be arranged on the edge of a mass body in a plan view. [Solution] The dynamic vibration absorber includes an elastic member provided on a base member, a mass body provided on the elastic member, and a screw member that screws onto an elastic-side threaded portion provided on the elastic member from above. The mass body includes a fixed layer having an insertion hole through which the screw member is inserted and removed from above, and a movable layer stacked on the fixed layer. The base member and the fixed layer each have a through hole formed in a position where they overlap in a plan view. The movable layer has a downward-facing pressure-receiving surface at a position where it overlaps with the through hole. The fixed layer and the movable layer are shaped to release the screw member so that the screw member can be operated from above the fixed layer when the fixed layer and the movable layer are separated, but to accommodate the screw member so that operation of the screw member is restricted when the fixed layer and the movable layer are stacked.

This invention discloses a design method for a gradient-embedded acoustic black hole and dynamic vibration absorber composite vibration isolator based on the reduced multibody system transfer matrix method. Based on the principles of acoustic black holes and dynamic vibration absorbers, a composite structure incorporating multiple gradient-embedded acoustic black holes and dynamic vibration absorbers is designed. Comparison with a gradient-embedded acoustic black hole structure of the same geometry and materials reveals that the gradient-embedded acoustic black hole and dynamic vibration absorber composite structure exhibits better low-frequency broadband vibration isolation performance.

The present application belongs to the field of helicopter vibration control, and relates to a power absorber engineering design method for local vibration control of a helicopter. The method comprises the following steps: determining an optimal installation position of the power absorber by carrying out power absorber and helicopter dynamics coupling analysis; determining an optimal effective mass of the power absorber in combination with overall design requirements of the power absorber; and carrying out power absorber structure design based on the effective mass of the power absorber.