14results about How to "Reduce vibration response" patented technology

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 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 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 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 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.