23results about How to "Reduce vibration response" patented technology

The invention provides a pneumatic-mechanical-hydraulic integrated load shedding and vibration suppression system and method for a floating type wind turbine. The system comprises a blade variable pitch control subsystem, a supporting structure mechanical resistance increasing subsystem, a floater motion control subsystem and an integrated controller. The integrated controller is internally provided with a torque control algorithm, a unified variable pitch control algorithm and a cooperative control algorithm; the torque control algorithm is used for adjusting motor torques and rotating speeds of the wind turbine generator and the floater generator set; the unified variable-pitch control algorithm and the cooperative control algorithm are used for controlling the blade variable-pitch control subsystem to realize adjustment of a pitch angle; meanwhile, the cooperative control algorithm cooperates with the supporting structure mechanical resistance increasing subsystem and the floater motion control subsystem to control output force. According to the method, the torque control algorithm, the unified variable pitch control algorithm and the cooperative control algorithm are integrated, the stability of the generated power of the wind turbine generator and the floater generator set is kept, the load and vibration response of the wind turbine are effectively reduced, and the stability and safety of the supporting tower are greatly improved.

The invention discloses a mixed anti-beam-falling device and a using method thereof. The mixed anti-beam-falling device comprises a first connecting piece, a second connecting piece, a limiting component and an energy consumption component. The first connecting piece is fixedly arranged on one side of the bridge pier; the second connecting piece is fixedly arranged at the bottom end of the bridge superstructure; the limiting component and the energy consumption component are connected with the first connecting piece and the second connecting piece through a first plug pin and a second plug pin respectively. The limiting component and the energy consumption component are arranged at proper positions of a bridge through the first connecting piece and the second connecting piece, and meanwhile, when a small-grade earthquake and a medium-grade earthquake happen, the first connecting piece and the second connecting piece move relatively, so that internal components of the energy consumption component rotate relatively, and earthquake vibration energy is dissipated; when a large-level earthquake occurs, the energy dissipation component moves to the limit position in the limiting component, the limiting component provides the limit bearing capacity, and the beam falling prevention function is further achieved.

The application provides a small satellite platform structure which carries a large amount of propellant and is connected and separated in point mode, belongs to the technical field of spacecraft structure, and comprises a frame, a bottom plate, a lower cabin partition plate, a storage tank support rod, a middle layer plate, an upper cabin partition plate, a top plate and a side plate, so that the side plate surrounds the parallelly arranged bottom plate, middle layer plate and top plate into a closed box body, the bottom plate is connected to the frame, the storage tanks are arranged diagonally in the round holes on the bottom plate and the middle layer plate, and the storage tank support rods are uniformly distributed around the round holes; the middle layer plate separates the box body into an upper cabin and a lower cabin, the upper cabin partition plate is connected in the upper cabin, and the lower cabin partition plate is connected in the lower cabin. The application proposes a configuration of "point connection + storage tank sinking", meets the demand of the small satellite platform for carrying a large amount of propellant, effectively reduces the whole satellite center of mass, and improves the satellite dynamic environment; meanwhile, the bottom main load-bearing frame cooperates with a detachable adapter block, can adapt to different mechanical interfaces of launch vehicles, and realizes point connection and separation.

The utility model discloses an anti-bending screw which comprises a screw body, the inner wall of the screw body is fixedly connected with a truss mechanism, the right-angle position of the truss mechanism is fixedly connected with a slope table, a rubber pad is placed on the top of the slope table, a countersunk bolt penetrates through the top of the rubber pad, and the countersunk bolt is in threaded connection with a cross-shaped rib plate. The top of the rubber pad is fixedly connected with a truss mechanism, the truss mechanism is fixedly connected with the inner wall of the screw main body, the inner surface of the truss mechanism is fixedly connected with an anti-buckling supporting assembly, the truss mechanism comprises a vertical rod, an upper chord and a lower chord, the vertical rod is fixedly connected to the top of the rubber pad, and the upper chord is fixedly connected to one side of the vertical rod. And the other side of the upper chord member is fixedly connected with the other vertical rod. According to the utility model, local deformation and even bending damage of the screw rod under bending moment can be prevented, and external load can be prevented from being concentrated on local parts, so that the reliability when the pressure in concrete is higher is improved.

The invention provides a shell vibration reduction structure, a liquid accumulator and a compressor, the shell vibration reduction structure comprises a shell, a plurality of photonic crystal unit cell assemblies are arranged on the shell, and the multiple photonic crystal unit cell assemblies are arranged on the peripheral wall of the shell at intervals. According to the liquid storage device, the technical problem that in the prior art, a liquid storage device vibration reduction structure cannot conduct vibration reduction and noise reduction on the liquid storage device, and consequently the user experience is poor can be solved.

The invention provides an SAR satellite structure suitable for multi-satellite launching and a design method, and relates to the technical field of spacecraft design, the SAR satellite structure comprises a satellite main body, a solar wing, a radiation unit, an antenna substrate, a plate penetrating connector, a TR assembly and a semi-rigid connection assembly, the SAR satellite structure adopts a trapezoidal cross section configuration, the internal space of a rocket fairing is fully utilized, and the space of the rocket fairing is fully utilized; a heat conduction unit and a heating unit are arranged between the radiation unit and the antenna substrate and between the antenna substrate and the TR assembly, so that the radiation array plane flatness of the radiation unit and the installation flatness of the TR assembly are ensured, heat conduction between single machines is increased, and the temperature consistency of the antenna is improved; the semi-rigid connection assembly can reduce the response of the active section antenna, release the thermal deformation of the antenna, reduce the flatness change, improve the precision of a radiation array plane, and solve the problems that the space utilization rate of an existing SAR satellite is low, the flatness of the antenna is easily affected by thermal deformation, and the temperature of the antenna is difficult to control.

The invention relates to the technical field of aero-engine maintenance, in particular to an equivalent flexible balance model and method suitable for aero-engine maintenance, provides an equivalent flexible balance model and develops an adaptive algorithm, and realizes visualization of balance parameters of a gas compressor rotor through a statistical matrix graph. Adjustment and determination of a counterweight position, visualization of product data and automatic calculation of a balance position during dynamic balance of a gas compressor rotor are realized, human errors can be effectively reduced, balance rework can be reduced, the maintenance quality of an aero-engine is improved, and vibration response during test run of the aero-engine is reduced; the initial unbalance amount of the gas compressor rotor is reduced by changing the balance weight of the multi-stage gas compressor rotor, so that the problem that the rotor couple unbalance cannot be reduced under low-speed balance is solved, and meanwhile, a set of equivalent flexible balance model is designed according to the method to visualize and solidify the balance process.

This invention relates to an air mass flow sensor for determining air mass flow rate, the air mass flow sensor having a housing (4) and sensor electronics (6), wherein the sensor electronics are at least partially disposed in a housing chamber (8) of the housing (4), wherein the housing (4) has a flow channel (14) for guiding an air mass flow (L) to be measured through the housing (4), the flow channel (14) having a measuring channel (20) and a bypass channel (22), wherein the measuring channel (20) guides a portion of the air mass flow (L) flowing into the flow channel (14) to a measuring point (24) of the sensor electronics (6), and wherein the bypass channel (22) guides a portion of the air mass flow (L) flowing into the flow channel (14) to a measuring point (24) of the sensor electronics (6) upon reaching the measuring point (24). 24) The first wall element (28) that branches out from the housing (4) at least segmentally separates the bypass channel (22) and the measuring channel (2) from each other has a wall height (H1) that is at least segmentally reduced, such that the first wall element (28) can be overflowed at least segmentally, and / or the first wall element (28) has a through hole (34) that allows flow through the first wall element (28), and the second wall element (33) that branches out from the bypass channel (22) and the inlet (16) of the flow channel (14) at least segmentally separates from each other has a wall height (H3) that is at least segmentally reduced, such that the second wall element (28) can be overflowed at least segmentally, and / or the second wall element (28) has a through hole (34) that allows flow through the second wall element (28).

The invention discloses a turnout frog area MTMD damping system under a complex load condition and a control method thereof, and the method comprises the steps: S1, building a finite element model of a turnout frog area, and obtaining the modal information of a frog structure through modal analysis; s2, according to the modal information of the turnout frog structure model, determining modal order and frequency needing to be controlled; s3, according to the modal characteristics of the finite element model of the turnout frog area, determining the modal shape of each order and the mounting position of each sub TMD; s4, formulating different design schemes according to an extended fixed-point theory and a multi-modal control design method, and calculating parameters and quantity of each sub-TMD; and S5, establishing a turnout frog area MTMD finite element model in combination with the sub-TMD parameters in the MTMD system calculated by each scheme, comparing the vibration acceleration response difference of the frog center position of each MTMD system, and selecting the optimal sub-TMD parameters and number. The MTMD technology is applied to the turnout frog area, the vibration response of the turnout frog area is effectively controlled, the vibration reduction effect of the turnout frog area is improved, and the environment vibration requirement of the turnout frog area is met.

The invention relates to the technical field of anti-seismic and anti-corrosion house building, and discloses a novel anti-seismic and anti-corrosion house building foundation which comprises a tamped soil base layer, a gravel layer is arranged on the top of the tamped soil base layer, a raft is arranged on the top of the gravel layer, transverse steel bars are fixedly connected to the middle of the raft, and longitudinal steel bars are fixedly connected to the middle of the raft. The top surface of the raft plate is fixedly connected with a pre-embedded steel plate, the top surface of the raft plate is fixedly connected with a column foot, the interior of the column foot is provided with a structural steel bar, the bottom of the raft plate is fixedly connected with a prestressed column, and the outer wall of the raft plate is fixedly connected with a geomembrane. Good water permeability of the gravel layer can effectively prevent underground water from being accumulated at the bottom of the foundation, the steel reinforcement framework of the raft effectively improves the bending resistance and the shearing resistance of the raft, the structural steel bars can enhance the bearing capacity and the anti-seismic performance of the column feet, and the prestressed columns can improve the crack resistance and the overall stability of the raft.

The present invention provides a large-scale belt tensioning tool, which belongs to the technical field of belt tensioning, and specifically includes: a base, a first rotating arm, a pulley shaft and an adjusting device, wherein one end of the first rotating arm is rotatably connected to the base, and the other end is fixed with a pulley shaft, and the adjusting device can adjust the angle between the first rotating arm and the base, and form a fixing effect. The present invention controls the belt tensioning force through the cooperation of the first rotating arm, the second rotating arm and the third rotating arm of the three-linkage, which is convenient for miniaturization of the device, and the position of the pulley shaft can be adjusted at any time according to the tightness of the belt, with a large tensioning range, convenient adjustment, simple operation, strong safety and high efficiency.

The present invention provides a tension-nested thick-meat rubber vertical seismic isolation and vibration control frame column, comprising: a column body, including an upper column and a lower column vertically separated and arranged; a vertical flexible node in the column, arranged between the upper column and the lower column, including an upper column end plate connected to the bottom end of the upper column, a lower column end plate connected to the top end of the lower column, and a sandwich thick-meat rubber bearing arranged between the upper column end plate and the lower column end plate; a tension bolt assembly, including upper and lower special high-strength bolts for connecting the upper and lower column end plates with the sandwich thick-meat rubber bearing, wherein the sandwich thick-meat rubber bearing includes a top plate connected to the upper column end plate, a bottom plate connected to the lower column end plate, and a rubber interlayer arranged between the top plate and the bottom plate. The tension-nested thick-meat rubber vertical seismic isolation and vibration control frame column of the present invention can greatly reduce the vibration response of the structure under the action of vertical earthquakes, and ensure the vertical stiffness of the frame column, meeting the seismic isolation requirements of the building structure under the action of vertical earthquakes.

The invention discloses a bridge damping device and a construction method thereof, and the device comprises a steel bar, the top end of which is hinged to an upper main beam through an embedded connecting piece, and the bottom end of which is connected to a bridge pier; the damping box is connected to the steel bar in a sleeved mode, and the steel bar is connected with the damping box through a damping spring. Horizontal and vertical displacement, caused by earthquakes or other vibration, of the main beam of the upper structure of the bridge is limited, so that the vibration response of the main beam is reduced, the main beam is prevented from falling, and the damping and falling-preventing effects are achieved.

The present invention provides a track bed resonator arranging method, characterized by comprising: step S 1, conduct vibration test on the track line and inside the building at the sensitive point near the track line that is greatly affected by vibration as the train passes through to obtain vibration data; step S2, calculate and determine the arranging range of the track bed resonators based on the vibration data measured in step S 1; step S3, perform frequency domain analysis on the vibration data of the sensitive points to determine the indoor vibration resonance natural frequency of building at sensitive point affected by train passing; step S4, design the track bed resonators based on the indoor vibration resonance natural frequency, so that the natural frequency of the track bed resonator is equal to the indoor vibration resonance natural frequency; step S5, arrange the track bed resonators along the extension direction of the track line on the track bed within the arranging range.

The present application belongs to the technical field of aircraft vibration design, and particularly relates to a method for topological optimization of the damping arrangement of a launch cabin structure, the method mainly comprising: step S1, constructing a dynamic finite element model of the launch system; step S2, applying the shock wave load to the corresponding area of ​​the dynamic finite element model according to the action range of the shock wave load at the outlet of the launch device; step S3, solving the dynamic response of the dynamic finite element model to obtain the acceleration response of the launch cabin structure; step S4, taking the area with relatively large acceleration response as the damping arrangement area; step S5, setting the damping material in the damping arrangement area, and determining the optimal paving area and paving thickness in which the acceleration response of the launch cabin structure is less than the dynamic response setting value, and the weight of the laid damping material is less than the weight setting value. The present application reduces the probability of failure of airborne accessories, and the weight of the additional damping material is the lightest.

The invention relates to a one-way force output inerter, which belongs to the field of vibration reduction and isolation of civil engineering structures, and comprises a supporting rod, a two-way reciprocating screw rod pair, a force arm, a steel rope fixing point, a bracket, a steel rope, a lower cross beam, a mass block and a base. The force arm, the support and the lower cross beam form a frame which serves as an upper output end of force and is connected with a main structure to be subjected to vibration reduction and isolation. The bottom of the supporting rod serves as a lower force output end and is connected with the base or the foundation; the steel rope converts axial movement of the two end points into rotation movement of the supporting rod and the mass block, and one-way pressure or tension output is achieved. The structure has the advantages of being simple in structure, reliable in work, flexible in adjustment, high in adaptability and the like, and can be widely applied to the fields of bridges, high-rise buildings, earthquake isolation systems, large machines and the like, and the vibration reduction and isolation effect and the safety performance of the structure are improved.

This utility model relates to the technical field of floor slab steel truss structures, and discloses a floor slab steel truss structure, including a floor slab. A quick-installation assembly is fixedly connected to the top of the floor slab, and a steel truss is fixedly connected to the top of the floor slab. A support and damping assembly is fixedly connected to one side of the steel truss. The quick-installation assembly includes a fixed base fixedly connected to the top of the floor slab, and a hollow cylinder fixedly connected to one side of the fixed base. A rotating column is slidably connected inside the hollow cylinder. The support and damping assembly includes a support rod fixedly connected to one side of the steel truss, a support fixedly connected to the surface of the support rod, and a support column slidably connected to the top of the support. This floor slab steel truss structure, through the quick-installation assembly, achieves convenient installation and positioning, improves construction efficiency, reduces installation difficulty, ensures structural accuracy and stability, and reduces the workload of personnel.

The utility model relates to the technical field of building construction, in particular to a cold-formed section steel composite wall structure with shape memory alloy energy dissipation supports, which is characterized in that support frames are arranged at two ends of a connecting beam, the connecting beam and the support frames form a closed space, a panel is arranged in the closed space, and the shape memory alloy energy dissipation supports are arranged in the closed space. The side edge of the panel is provided with an energy dissipation support, the energy dissipation support is arranged in the closed space, and the end of the energy dissipation support is fixedly connected with the connecting beam and the bearing frame through anti-pulling pieces. According to the supporting frame, the stability and the connection reliability of the whole wall body are enhanced through the multiple connection mode of the reinforcing profile steel and the side edge stand columns, meanwhile, the middle stand columns are tightly fixed to the connecting beams through the middle reinforcing connecting pieces, and stable connection of the main body structure of the wall body is further guaranteed.

The invention discloses a high-strength die-casting new energy automobile steering gear shell. The high-strength die-casting new energy automobile steering gear shell comprises a main shell, a shaft end cover, an inner shaft barrel, a damping interlayer structure, an acoustic cavity structure and a micro-ripple structure. The main shell is formed by integral die-casting, and a plurality of groups of micro-ripple structures distributed along the circumferential direction are arranged on the peripheral surface of the main shell so as to form a periodic rigidity change area; a damping interlayer structure is constructed between the inner wall of the main shell and the outer wall of the inner shaft barrel, and absorption of low-frequency vibration energy is achieved through the double-face attaching effect of an elastic interlayer material. An acoustic cavity structure is further formed on the inner side of the main shell, and a silencing grid is arranged in the cavity and used for scattering and phase interference of intermediate-frequency noise such as rack meshing. Through cooperative arrangement of the inner damping layer, the middle acoustic cavity layer and the outer micro-ripples layer, graded attenuation paths can be formed for low-frequency, medium-frequency and high-frequency vibration noise, the overall NVH performance and structural stability of the steering gear shell are remarkably improved, and the requirements of modern vehicles for driving quietness and control quality are met.

The invention discloses a stand column steel frame structure for house construction, and relates to the technical field of steel structure constructions.The stand column steel frame structure comprises a steel frame body, a base is installed at the bottom of the steel frame body, and a concentric-square-shaped plate is slidably connected to the outer side of the steel frame body; the expansion supporting assembly comprises a plurality of connecting rods movably connected to the steel frame body and a supporting plate movably connected to the ends of the connecting rods, the connecting rods achieve expansion of the supporting plate through downward movement and extrusion of the concentric-square-shaped plate, the supporting plate can move in multiple directions with the connecting rods as the center, and a connecting plate is installed at the end, away from the base, of the steel frame body. According to the steel frame, the steel frame body can be expanded and supported rapidly and simultaneously through the multiple supporting plates through the expanding supporting assembly, the bottom stability of the steel frame body is guaranteed, the supporting plates can be adjusted in multiple directions, the supporting area can be adjusted according to the actual situation, and the supporting effect is improved. And the adaptability of the device is enhanced.

The invention relates to the technical field of building structures, in particular to a steel structure module building floor slab system which comprises a steel-wood composite floor slab, an open-web truss and an outer frame. The outer frame comprises a transverse bottom frame beam, a longitudinal bottom frame beam, a transverse top frame beam and a longitudinal top frame beam; a rectangular frame structure is defined by the transverse bottom frame beams and the longitudinal bottom frame beams. A rectangular frame structure opposite to the transverse bottom frame beams and the longitudinal bottom frame beams is defined by the transverse top frame beams and the longitudinal top frame beams. The periphery of the steel-wood composite floor is fixedly connected with the transverse bottom frame beam and the longitudinal bottom frame. And the hollow truss is arranged below the steel-wood composite floor slab and is connected with the steel-wood composite floor slab, the longitudinal bottom frame beam and the longitudinal top frame beam. A building structure which is stable and high in bearing capacity is formed by combining the steel-wood composite floor, the hollow truss and the outer frame.

The present invention belongs to the technical field of underwater super-plate vibration and acoustic radiation, and discloses a method for controlling turbulence-excited vibration and acoustic radiation of a lateral localized resonant super-plate under turbulent excitation. The present invention uses the equivalent continuum theory to equate a discrete lateral localized resonant super-plate to a continuum whose mass density or Young's modulus varies with frequency. The equivalent continuum theory is used to present the effects of the lateral localized resonant structure in the equivalent mass density of the base plate by equivalent means, and the mutual power spectrum density equation of the displacement response of the elastic structure under turbulent excitation is established based on random theory. The velocity mutual power spectrum density solution expression is obtained by using modal expansion, Rayleigh integral, and modal orthogonality, so as to study the vibration and acoustic radiation mechanism of the finite period underwater lateral localized resonant super-plate under turbulent excitation.