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133results about How to "Reduced dynamic response" patented technology
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Arrangement for mounting an engine on the airframe of an aircraft
InactiveUS7726602B2Reduced dynamic responseEasy to disassemblePower plant constructionGas turbine type power plantsActuatorFuselage
Arrangement for mounting a propulsive system on an aircraft airframe by an external pylon which connects the engine with the airframe, the pylon 4comprising a plurality of spars intruding into the airframe and units for attaching the spars to the internal airframe structure, the cited units being dampers, shock absorbers or active actuators with characteristics chosen so that the units are particularly suited for the efficient reduction of attachment and internal dynamic loads arising mainly but not only from hard landing events and aircraft flight manoeuvres, and for damping sustained vibrations of the propulsive system-airframe assembly, the arrangement allowing the easy removal of the pylon 4 from the rest of the airframe and the interchangeability of the pylon 4 between different aircrafts, being also the cited arrangement tolerant to damage or complete failure of at least one of the spars.
Owner:AIRBUS OPERATIONS SL
Design method of aeroelastic model for long-span transmission tower-line system
ActiveCN108959742AReduce aerodynamic dragReduced dynamic responseGeometric CADDesign optimisation/simulationTransmission towerRigid model
A design method of an aeroelastic model for a long-span transmission tower-line system is disclosed. On the basis of boundary layer wind tunnel test data of a rigid model, a finite element model is utilized to calculate that relaxed Froude number similarity criterion of transmission towers, the influence of the elastic stiffness of a transmission line and two kinds of variable proportion transmission line models upon wind-induced response is changed, an aeroelastic model with long span is designed. The influence of material nonlinearity and gradient wind height of concrete filled steel tube onwind-induced response is further analyzed by the finite element model. The method has the advantages that the aeroelastic model of long span can be reasonably designed by increasing the elastic stiffness of the transmission line and adopting an accurate line length similarity ratio; consideration of the material nonlinearity of concrete-filled steel tubes has little effect on wind-induced response at design wind speed, and the wind-induced response decreases when considering the gradient wind height.
Owner:CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
Method and control unit for activating at least one headlight of a vehicle using a traffic density
InactiveUS20140334168A1Increase probabilityLong holding timeNon-electric lightingVehicle headlampsRoad userControl parameters
Owner:ROBERT BOSCH GMBH
Offshore wind power foundation consisting of single pile, cylindrical foundations and anchor cable
ActiveCN103225315AReduce the overall diameterReduce thicknessBulkheads/pilesElectricityEarth surface
The invention discloses an offshore wind power foundation structure consisting of a single pile, cylindrical foundations and an anchor cable. The offshore wind power foundation structure consists of a single pile, multiple cylindrical foundations and an anchor cable, wherein the cylindrical foundations are uniformly distributed on the circumference which takes the single pile as the center of a circle; the anchor cable is obliquely tensioned and is connected with the cylindrical foundations and the single pile; the anchor cable, the cylindrical foundations and the single pile are connected through welding; the included angle between the anchor cable and the single pile is between 30 and 60 degrees; and the top of the single pile is connected with a wind turbine tower through a flange plate. According to the technical scheme, a novel foundation type consisting of the single pile, the cylindrical foundations and the anchor cable is given, the anchor cable is connected with the cylindrical foundations and the single pile and is obliquely tensioned, the resistance of shallow soil on the earth surface is fully exerted, the bending moment resistance of the structure is enhanced, and the displacement of the pile body is reduced, so that the aim of reducing the diameter and thickness of the single pile is fulfilled.
Owner:TIANJIN UNIV
Micro-electro-mechanical device with compensation of errors due to disturbance forces, such as quadrature components
ActiveUS20150377624A1Reduce morbidityReduced dynamic responseAcceleration measurement using interia forcesSpeed measurement using gyroscopic effectsSemiconductor materialsEngineering
MEMS device having a support region elastically carrying a suspended mass through first elastic elements. A tuned dynamic absorber is elastically coupled to the suspended mass and configured to dampen quadrature forces acting on the suspended mass at the natural oscillation frequency of the dynamic absorber. The tuned dynamic absorber is formed by a damping mass coupled to the suspended mass through second elastic elements. In an embodiment, the suspended mass and the damping mass are formed in a same structural layer, for example of semiconductor material, and the damping mass is surrounded by the suspended mass.
Owner:STMICROELECTRONICS SRL
Single pile and gravity combined offshore wind power foundation
InactiveCN104818727AImprove anti-overturn performanceReduce horizontal displacementFoundation engineeringOffshore wind powerTower
The invention discloses a single pile and gravity combined offshore wind plant blower foundation. The foundation comprises a steel pipe pile vertically inserted to a seabed; the upper end of the steel pipe pile is connected with a transition section, and the upper end of the transition section is connected with a blower tower cylinder; the lower end of the steel pipe pile is anchored on the seabed by crossing through a gravity type foundation. The technical scheme of the single pile-gravity combined offshore wind plant blower foundation provides a novel foundation model formed by combining a single pile and the gravity; through adding an additional hollow gravity type foundation at the position of the steel pipe pile closing to the seabed, the rigidity of the single pile foundation closing to the seabed face is enhanced, advantages of two foundations are combined, and the using scale of a single-pile foundation is enlarged. The scheme increases the ability of resisting bending torque of the single-pile foundation, reduces the displacement of the pile body, and decreases the diameter and the thickness of the steel pipe pile.
Owner:FUJIAN YONGFU POWER ENG +1
Carbon fiber cable reinforced spoke type cable truss structure
PendingCN111441477AImprove overall stiffnessDecreased static and dynamic responseBuilding roofsAwningLong span
The invention relates to the field of large-span stadium awning structures, in particular to a carbon fiber cable reinforced spoke type cable truss structure. The spoke type cable truss structure comprises a radial cable truss, an inner pull ring and an outer pressing ring, wherein the inner pull ring and the outer pressing ring are arranged at the two ends of the radial cable truss. The radial cable truss is composed of an upper radial cable, a lower radial cable and cable truss supporting rods, the inner pull ring is composed of an upper ring cable, a lower ring cable, a ring cable supporting rod and an inner ring cross cable, and the inner ring cross cable is a carbon fiber cable. According to the carbon fiber cable reinforced spoke type cable truss structure, the carbon fiber cross cable is additionally arranged in an inner ring cable plane of the spoke type cable truss structure; after the improvement, the vertical rigidity of the spoke type cable truss structure is greatly enhanced, and the response is obviously reduced under the action of wind loads and the like. The carbon fiber cable is small in section and rigidity, the influence on the inner pull ring cable force is small, the cable clamp unbalanced force can be remarkably reduced, the cable clamp structure is simplified, and therefore the problem that the cable clamp bearing capacity is insufficient is solved without additionally arranging balance cables.
Owner:BEIJING INST OF ARCHITECTURAL DESIGN
Structural stability enhancing floating wind turbine foundation
PendingCN108119315AIncreased durabilityReasonable arrangementWind motor supports/mountsVessel safetyStructural stabilityEngineering
The invention discloses a structural stability enhancing floating wind turbine foundation. The structural stability enhancing floating wind turbine foundation comprises a floating plate, a middle column, steel supports, tree shock absorbing buoys and a damping pendulum, wherein the central column is arranged in the center of a triangular structure formed by the three shock absorbing buoys, the above of the central column is provided with the floating plate, and the top of the floating plate is provided with a wind turbine; every shock absorbing buoy is composed of, sequentially from top to bottom, an equipment cabin, a ballast tank and a heaving plate, the equipment cabin serves as the mechanical storage chambers of power generation of the wind turbine, the ballast tank enables the buoyantcenter of the overall structure to be higher than the center of gravity through ballast, and the heaving plate is used for greatly reducing structural heaving response; steel supports are connected between every two shock absorbing buoys as well as between every shock absorbing buoy and the central column; the lower ends of the three shock absorbing buoys are all connected to the damping pendulum. The structural stability enhancing floating wind turbine foundation is connected to the seafloor through a tension type mooring system, and the tension type mooring system is composed of a lower anchoring end and an upper mooring cable. The structural stability enhancing floating wind turbine foundation can resist complex marine cyclic dynamic load to maintain long-term stability of an upper wind turbine tower.
Owner:ZHEJIANG UNIV
Rock-socketed single pile foundation through offshore wind power and construction method of rock-socketed single pile foundation
ActiveCN105862905AIncrease stiffnessImprove carrying capacityFoundation engineeringBedrockOffshore wind power
The invention relates to a rock-socketed single pile foundation through offshore wind power and a construction method of the rock-socketed single pile foundation. The rock-socketed single pile foundation comprises a steel pipe single pile which is positioned in the center, wherein the lower end of the steel pipe single pile is inserted into a seabed, and the upper end of the steel pipe single pile is positioned above the sea level; a fan tower cylinder is mounted at the upper end of the steel pipe single pile, and a plurality of steel pipe grouting piles which are fixedly connected to the steel pipe single pile are arranged at intervals at the internal circumambient part or the periphery in the steel pipe single pile; the lower ends of the steel pipe grouting piles are inserted into the seabed, and the upper ends of the steel pipe grouting piles are positioned above the sea level; the inner parts of the lower ends of the steel pipe grouting piles are grouted with concrete socketed piles of which the lower ends penetrate through the lower ends of the steel pipe grouting piles to be embedded and fixed in a baserock layer of the seabed. According to the rock-socketed single pile foundation disclosed by the invention, the difficult problem that at current, in China, full cut-off sock-socketed construction of large diameter pile foundation cannot be realized is effectively solved, and besides, the horizontal load bearing capacity and the antidumping capacity of the pile foundation are improved; the dynamic response of infrastructures is reduced, the application scope of the single pile foundation is enlarged, and the single pile foundation disclosed by the invention has a high application value.
Owner:FUJIAN XINNENG OFFSHORE WIND POWER R & D CENT CO LTD +1
Control device and method for controlling a hybrid drive
ActiveUS20100042278A1Good dynamic responseRapidly retrievable torque reserveHybrid vehiclesCommutation monitoringMobile vehicleCombustion
A control device for a hybrid drive, in particular for a hybrid drive of a motor vehicle having at least one combustion engine and at least one electric motor as driving motors, whose torques are coupled together to form a total torque. A controller is provided which generates an actuating signal for controlling the speed of each of the driving motors, a first actuating signal acting on the electric motor having a higher dynamic response than a second actuating signal acting on the combustion engine.
Owner:ROBERT BOSCH GMBH
Intelligent dragline and wind power generation hightower adopting same
InactiveCN102182645AEasy to makeLow costWind energy generationWind motor componentsEngineeringNatural factor
The invention discloses an intelligent dragline and a wind power generation hightower adopting the intelligent dragline. The intelligent dragline comprises a top anchor ring, a middle anchor ring, a pulley, SMA (Surface Mounted Assembly) tendons and a prestress cable, wherein one end of the prestress cable is connected with the top anchor ring, and the other end of the prestress cable is fixed atthe bottom of a device for installing the intelligent dragline; the middle anchor ring and the pulley which are installed in sequence at intervals penetrate through the middle of the prestress cable;and the SMA tendons penetrate through the prestress cable between the top anchor ring and the middle anchor ring as well as between the middle anchor ring and the pulley. When the intelligent dragline is installed in a wind power generation tower, the top anchor ring of the intelligent dragline is fixed at the top of the tower, the pulley is fixed on the wall of the tower, one end of the prestress cable is connected with the top anchor ring, and the other end of the prestress cable is fixed in a foundation. The intelligent dragline can reduce and control vibration in the horizontal direction,and can overcome the defects that the existing wind power generation hightower system has poor vibration-proof performance, and is easy to be damaged by natural factors such as strong wind, strong wave and the like.
Owner:TONGJI UNIV
Variable-rigidity hydraulic three-dimensional shock isolation device and method
The invention relates to a variable-rigidity hydraulic three-dimensional shock isolation device and method. The variable-rigidity hydraulic three-dimensional shock isolation device comprises an upper vertical shock isolation system, a lower overlapped rubber support, a pressure reducing cylinder, a pressure increasing cylinder and a connecting component. The vertical shock isolation system comprises a vertical shock isolator upper connecting plate, a vertical guide rail, a main cylinder piston rod, a main cylinder limiting and guiding sleeve, a main cylinder bottom piston series-connection pressure spring, a main cylinder bottom piston series-connection tension spring, a vertical shock isolator lower connecting plate and a main cylinder top sealing plate. The overlapped rubber support comprises an upper connecting plate, a steel plate layer, a rubber layer and an overlapped rubber support lower connecting plate. The pressure reducing cylinder comprises a pressure reducing cylinder piston series-connection pressure spring, a pressure reducing cylinder buffering mat layer, a pressure reducing cylinder guiding sleeve, a pressure reducing cylinder piston rod, a pressure reducing cylinder supporting ring and a pressure reducing cylinder top sealing plate. The pressure increasing cylinder comprises a pressure increasing cylinder piston series-connection pressure spring, a pressure increasing cylinder buffer mat layer, a pressure increasing cylinder guiding sleeve, a pressure increasing cylinder piston rod, a pressure increasing cylinder supporting ring and a pressure increasing cylinder top sealing plate. Vertical variable-rigidity control is achieved while vertical bearing force is guaranteed, and limiting and pull-resisting measures are adopted.
Owner:TIANJIN UNIV
Intelligent vibration damping device based on SMA variable-rigidity spring and working process
ActiveCN107314073AReduced dynamic responseExcellent vibration damping performanceSpringsSprings/dampers functional characteristicsEngineeringRefrigerated temperature
The invention discloses an intelligent vibration damping device based on an SMA variable-rigidity spring and a working process. The device comprises a vibration monitoring part, a working chamber temperature control part and a vibration damper main body part. The vibration monitoring part is composed of an oscilloscope, a cable and a sensor probe, the working chamber temperature control part is composed of a temperature display, a temperature regulator, a wire, a temperature sensor, a miniature refrigerator and a heater, and the vibration damper main body part is composed of an aluminum spring, a center moving shaft, a rubber gasket, a high damping tension sleeve, an NiTi-SMA spring, a movable sliding block, a hinged short bar and a metal shell. According to the intelligent vibration damping device based on the SMA variable-rigidity spring and the working process, a rigidity change rule presented by the NiTi-SMA spring which has the temperature sensitive characteristic under different temperatures is utilized, and the functions of intelligent vibration damping and vibration avoiding of a novel vibration damper are achieved; the intelligent vibration damping device has the advantages that the device is intelligent and controllable, the effect is obvious, the structure is simple, and machining is convenient; and the device is suitable for vibration damping systems of various large, medium and small scales industries and equipment for civil use.
Owner:XI AN JIAOTONG UNIV
Pulling-resistant frictional oscillating support for seismic reduction and isolation
InactiveCN102758402AReduced dynamic responseExtended base periodBridge structural detailsEngineeringSlide plate
Double-tuned liquid column damper
The invention provides a double-tuned liquid column damper, and belongs to the technical field of damping and vibration isolation of structural works. The double-tuned liquid column damper comprises horizontal sliding devices (1), a lower-layer horizontal spring (2), a U-shaped water tank (3), a water tank damping hole (4) and liquid (5) inside the U-shaped water tank (3). The U-shaped water tank (3) oscillates back and forth in the main vibration direction of a structure and is hung or supported at the maximum structural vibration displacement position of the building through the horizontal sliding devices (1), and returns through the lower-layer horizontal spring (2) connecting the U-shaped water tank (3) and the building structure. The water tank damping hole (4) is formed in the bottom of the U-shaped water tank (3), and the liquid (5) inside the U-shaped water tank (3) generates damping through the water tank damping hole (4) to consume vibration energy of the structure. The double-tuned liquid column damper can be used for both vibration control over a newly built building structure and reinforcing maintenance of existing works, and can produce high economic benefit and social benefit.
Owner:BEIJING UNIV OF TECH
Impact resistant platform for ship
InactiveCN107554685AReduced dynamic responseGood effectVessel cleaningHull bulkheadsBinding energyEngineering
The invention relates to the technical field of local anti-shock of ships, in particular to a ship anti-shock platform, which includes a front bulkhead and a rear bulkhead, multiple sets of elastic sliding devices are arranged between the front bulkhead and the rear bulkhead, and two adjacent An energy-absorbing buffer device is arranged between the groups of elastic sliding devices. The present invention adopts such a structural arrangement, by providing multiple sets of elastic sliding devices between the front bulkhead and the rear bulkhead, and an energy-absorbing buffer device is provided between two adjacent sets of elastic sliding devices, under the impact force, Through the organic combination of the elastic sliding device and the energy-absorbing buffer device, the impact energy is converted into the internal energy of the energy-absorbing buffer device and the elastic potential energy of the elastic sliding device, thereby reducing the dynamic response of the impact force to the hull and effectively achieving the effect of protecting the hull. The structure is simple and the effect is remarkable.
Owner:WUHAN UNIV OF TECH
High-bearing-capacity tensile energy-consuming seismic isolation device with multiple adjustable sliding surfaces
ActiveCN110258812AHigh bearing capacity characteristicsGood horizontal isolation performanceProtective buildings/sheltersShock proofingRelative displacementStructure of the Earth
The invention discloses a high-bearing-capacity tensile energy-consuming seismic isolation device with multiple adjustable sliding surfaces, and belongs to the technical field of constructional engineering structure seismic isolation. The seismic isolation device comprises an upper connecting plate, an upper flange plate, a plurality of U-shaped supports, a curved surface sliding block, a curved surface sliding groove, an upper sliding surface, a lower sliding surface, a lower flange plate and a lower connecting plate. The vertical distance between a top sliding surface of the curved surface sliding block and the upper sliding surface is equivalent to the vertical relative displacement of upper limbs and lower limbs of the multiple U-shaped supports of the same specification, and is also equivalent to the vertical relative displacement between the upper flange plate and the lower flange plate. The radius of curvature of the top sliding surface of the curved surface sliding block is the same as the radius of curvature of the upper sliding surface, and the radius of curvature of a bottom sliding surface of the curved surface sliding block is the same as the radius of curvature of an inner sliding surface of the curved surface sliding groove. The multiple U-shaped supports of the same specification are arranged. The seismic isolation device is high in bearing capacity, good in horizontal seismic isolation, high in tensile energy-consuming characteristic, economical and practical, and environmentally friendly.
Owner:HUAZHONG UNIV OF SCI & TECH
Self-resetting energy dissipation connection device
ActiveCN107476183AMeet the seismic deformation requirementsSimple technologyBridge structural detailsEngineeringRestoring force
The invention discloses a self-resetting energy dissipation connection device, is suitable for seismic designing and seismic strengthening of bridge and building structures, and belongs to the field of bridges and buildings. The device is located between a bridge beam body and pier. A spring is arranged at the center inside the device. Soft steel energy dissipation rods are arranged on the both sides of the spring separately. The outer side of the device is provided with a slidable nested structure formed by outer limit plates and inner limit plates. The excessive displacement is prevented from being generated by using the elastic restoring force of the spring, the plastic hysteretic deformation energy dissipation principle of the soft steel energy dissipation rods, and the slidable nested structure, part of the deformation of the structure is restored, and thus the deformation of bridge nodes is restrained. By taking displacement as the excitation source, the device can not only dissipate energy input into the structure by earthquakes, but also has very good limiting and self-resetting functions, which can better meet the requirement of limiting seismic deformation of the structure, and technical supports are provided for post-earthquake structure repairing and strengthening and emergency use. The self-resetting energy dissipation connection device has the advantages of low cost, low technical requirements, good durability, and convenience in maintenance and inspection.
Owner:北京固桥科技有限责任公司
Control method for increasing driving range of hydrogen fuel cell vehicle
PendingCN112590623AImprove energy efficiencyIncrease mileagePropulsion by capacitorsVehicular energy storageElectric machineryCapacitance
The invention discloses a control method for increasing the driving range of a hydrogen fuel cell vehicle. According to the method, the auxiliary energy super capacitor SOC of the hydrogen fuel cell vehicle is divided into a charging-only interval, a charging-discharging interval and a discharging-only interval; when the auxiliary energy super capacitor SOC is in the charging and discharging interval, a vehicle control unit calculates the real-time power P required by the vehicle through an accelerator pedal, a brake pedal, a gear switch, the vehicle speed and the motor rotating speed; according to the real-time power P, output power is selected by a fuel cell system of the hydrogen fuel cell vehicle; for the power demand of rapid conversion in the whole vehicle driving process, the auxiliary energy super capacitor bears the energy of a rapid conversion part, and the fuel cell system bears the energy of a slow change part. The energy utilization efficiency is improved, the driving range of the hydrogen fuel cell vehicle is increased, the power adjustment frequency of the hydrogen fuel cell system is reduced, and the service life of the hydrogen fuel cell system is prolonged.
Owner:WUHAN GROVE HYDROGEN AUTOMOBILE CO LTD
Full-prefabricated assembly type concrete freight transport suspension type monorail structure
PendingCN108505406ADriving safetySmall average loadRailway tracksBridge structural detailsReinforced concreteRebar
The invention discloses a full-prefabricated assembly type concrete freight transport suspension type monorail structure. The structure comprises multiple prefabricated concrete track beams, the two ends of each prefabricated concrete track beam are connected with prefabricated concrete crossbeams, prefabricated hollow concrete piers are arranged at the two ends of each prefabricated concrete crossbeam, the bottoms of the two prefabricated hollow concrete piers corresponding to each prefabricated concrete crossbeam are installed on a prefabricated raft foundation, and each prefabricated raft foundation is fixed to the ground, wherein the length of each prefabricated concrete track beam is smaller than or equal to 10 m. Each component is a prefabricated member, quick assembly type construction is facilitated, the construction schedule is quickened, and construction cost is greatly saved; each component is prefabricated through reinforced concrete, the quality is reliable, the construction speed is high, maintenance cost in the later stage is low, construction cost is low, the structure is more environment-friendly, and traveling safety is facilitated; and the prefabricated raft foundations are adopted, the construction speed can be increased, soil texture exploration conducted in the earlier stage is not needed, and the earlier stage engineering cost is reduced.
Owner:CHINA RAILWAY ERYUAN ENG GRP CO LTD
High-bearing-capacity tensile seismic isolation device with two-way sliding support
ActiveCN110258813AHigh bearing capacity characteristicsGood horizontal isolation performanceProtective buildings/sheltersShock proofingRelative displacementTorsional buckling
The invention discloses a high-bearing-capacity tensile seismic isolation device with a two-way sliding support, and belongs to the technical field of seismic isolation of civil engineering structures. The device comprises an upper support plate, an upper horizontal sliding groove, a plurality of U-shaped supports, a support sliding block, a sliding groove limiting machine, a curved surface sliding ball, a curved surface sliding groove, a lower sliding surface, a lower horizontal sliding groove and a lower support plate. The curved surface sliding ball moves synchronously with the upper support plate. The curved surface sliding groove is capable of rotating and swinging around the curved surface sliding ball. The vertical distance between a bottom sliding surface of the curved surface sliding ball and a bottom sliding surface of the curved surface sliding groove is equivalent to the vertical relative displacement of upper limbs and lower limbs of the multiple U-shaped supports of the same specification. The upper horizontal sliding groove and the lower horizontal sliding groove can ensure the in-plane buckling energy consumption of the U-shaped supports without the out-of-plane torsional buckling, so that the service life of the U-shaped supports is longer. The seismic isolation device is high in bearing capacity, good in horizontal seismic isolation, high in tensile energy consumption, economical and durable, and environmentally friendly.
Owner:HUAZHONG UNIV OF SCI & TECH
Power transmission tower vibration damper as well as preparation and use method thereof
InactiveCN107338885AAchieve vibration reductionAdd nonlinear stiffnessProtective buildings/sheltersShock proofingMass ratioShape-memory alloy
A power transmission tower vibration damper comprises a cylinder-shaped metal box body fixedly installed in the center of the top of a power transmission tower, a high-damping spring made of a martensite shape memory alloy is suspended in the center of an inner top plate of the metal box body, a solid steel ball is tied at the lower end of the high-damping spring, and elastic adhesive tapes are pasted to the inner side wall of the metal box body. According to the power transmission tower vibration damper, under the effect of external excitation, the high-damping spring of the damper conducts damping by depending on internal resonance of the swing modal and the vibration modal of the high-damping spring and the restoring force of the high-damping spring when the solid steel ball and the box body do not collide; when colliding with the box body under the effect of a dynamic load, the solid steel ball applies work by depending on collision force of the box body to the solid steel ball to conduct damping; and the mass ratio of the solid steel ball to the power transmission tower, the inner diameter and the height of the metal box body and the length and the strength of the high-damping spring are obtained through provided computational formulas, and the power transmission tower vibration damper can achieve the best damping effect.
Owner:SHENYANG JIANZHU UNIVERSITY
Micro-electro-mechanical device with compensation of errors due to disturbance forces, such as quadrature components
ActiveUS9696157B2Reduce morbidityReduced dynamic responseSpeed measurement using gyroscopic effectsPiezoelectric/electrostrictive devicesSemiconductor materialsEngineering
MEMS device having a support region elastically carrying a suspended mass through first elastic elements. A tuned dynamic absorber is elastically coupled to the suspended mass and configured to dampen quadrature forces acting on the suspended mass at the natural oscillation frequency of the dynamic absorber. The tuned dynamic absorber is formed by a damping mass coupled to the suspended mass through second elastic elements. In an embodiment, the suspended mass and the damping mass are formed in a same structural layer, for example of semiconductor material, and the damping mass is surrounded by the suspended mass.
Owner:STMICROELECTRONICS SRL
Roadbed and method for controlling differential settlement of road-bridge transition section of high-speed railway
ActiveCN110904740ALight weightLow costRoadwaysRailway tracksReinforced concreteGeotechnical engineering
The invention relates to a roadbed for controlling differential settlement of a road-bridge transition section of a high-speed railway. The roadbed comprises a roadbed body and a transition roadbed arranged between the roadbed body and a bridge abutment, a roadbed surface layer is paved above the transition roadbed; foundation reinforcing piles which are arranged in the transverse direction and the longitudinal direction and extend into an underground soil layer are arranged below the transition roadbed . The lengths of the foundation reinforcing piles are sequentially reduced from the centerline of the roadbed to two sides; the transition roadbed comprises a first foam concrete body and second foam concrete bodies laid on the top face and the bottom face of the first foam concrete body respectively. A layer of trapezoidal reinforced concrete body is also arranged between the top surface of the first foam concrete body and the second foam concrete body; the first foam concrete body and the trapezoidal reinforced concrete body are matched with each other to form a contact transition surface with a stepped structure with the roadbed body. Compared with the prior art, the roadbed hasthe advantages that differential settlement of a road and bridge transition section is controlled, construction is convenient, and the like.
Owner:TONGJI UNIV
Locking device for bridge structure shock absorption control
InactiveCN103526690AReduced flow areaReduced dynamic responseBridge structural detailsFan bladeUltimate tensile strength
According to a locking device for bridge structure shock absorption control, three fan-blade-shaped piston pieces are overlapped to form a piston of the device, rubber pieces are adhered to the outer layers of the three fan-blade-shaped piston pieces, the piston is fixed to a pull rod, the piston and the pull rod are arranged in an oil cylinder filled with silicone oil, the oil cylinder is thereby divided into three portions through the left piston piece and the right piston piece, and the pull rod drives the piston to conduct longitudinal displacement and torsional displacement. The viscous force produced when the silicone oil passes through orifices controls the movement of the pull rod, the left piston piece and the right piston piece are simultaneously locked, and the locking strength of the device is enhanced. Meanwhile, hole diameter automatic adjusting systems are arranged inside the left piston piece and the right piston piece respectively, and each hole diameter automatic adjusting system is composed of a drainage hole, one of the orifices, two springs and a trapezoid steel block, and the longitudinal locking speed of the device is improved through the pressure intensity difference caused by the difference of the flow velocities of liquid on two sides of the trapezoid steel block when the piston moves. Furthermore, the fan-blade-shaped piston pieces of the device stir the silicone oil to flow when torsional displacement occurs, and the force exerted by an earthquake on a bridge structure is reduced through energy produced by the earthquake in the viscosity dissipation portion of the locking device.
Owner:SOUTHEAST UNIV
Offshore wind power foundation consisting of single pile and cylindrical foundations
InactiveCN103225314AReduce the overall diameterReduce thicknessBulkheads/pilesElectricityEngineering
The invention discloses an offshore wind power foundation consisting of a single pile and cylindrical foundations. The cylindrical foundations are uniformly distributed on the circumference which takes the single pile as the center of a circle; the single pile is a steel pipe pile; the cylindrical foundations and the cylindrical foundations and the single pile are connected through connecting steel pipes through welding; and the top of the single pile is connected with a wind turbine tower through a flange plate. According to the technical scheme, a novel foundation type consisting of the single pile and the cylindrical foundations through the connecting steel pipe is given, the resistance of shallow soil on the earth surface is fully exerted through the cylindrical foundations and the connecting steel pipe, the bending moment resistance of the single pile structure is enhanced, and the displacement of the pile body is reduced, so that the aim of reducing the diameter and thickness of the single pile is fulfilled.
Owner:TIANJIN UNIV
Wedge-shaped debris flow-dividing blocking device and construction method thereof
The invention discloses a wedge-shaped debris flow-dividing blocking device and a construction method thereof. The device comprises a circular-arc-shaped blocking wall and two wing-shaped blocking walls. The circular-arc-shaped blocking wall is located at the foremost end of the whole device, and the wing-shaped blocking walls are fixed to the two sides symmetrically. Unbonded prestress systems are arranged in the circular-arc-shaped blocking wall and the wing-shaped blocking walls correspondingly. Each unbonded prestress system comprises a plurality of vertical unbonded prestress stranded steel wire devices which are composed of stranded steel wires, anchorage devices and corrugated pipes. Foundation slabs are arranged at the bottoms of the circular-arc-shaped blocking wall and the wing-shaped blocking walls correspondingly, and uplift pile foundations are additionally arranged under the foundation slabs provided with the unbonded prestress systems correspondingly. According to the device and method thereof, the unbonded prestress systems are arranged in the large stress areas, a good energy consumption effect is achieved, and dynamic response of the whole device is reduced. Whenthe device is impacted by debris, the flowing direction of the debris can be changed while the stability of the device is guaranteed, the impact energy is dissipated, and the safety of significant buildings or structures behind the device is guaranteed.
Owner:ZHEJIANG UNIV
Built-in compartment type particle inertial-capacitance damper
ActiveCN112832577ARobustSimple structureBridge structural detailsProtective buildings/sheltersPhysicsFlywheel
The invention discloses a built-in compartment type particle inertial-capacitance damper. The built-in compartment type particle inertial-capacitance damper is characterized in that one end of a ballscrew is inserted into a first metal shell through a nut, and the other end of the ball screw is inserted into a second metal shell through a bearing and welded to a flywheel; a plurality of compartments are arranged in the flywheel, the areas of the compartments are the same or different, a certain number of particles are placed in the compartments, the particle filling rates are the same or different, and thus the multi-frequency tuning function is achieved; and energy dissipation layers are attached to the inner walls of the compartments. When a controlled component vibrates to enable the first metal shell and the second metal shell to move relatively, the ball screw can drive the flywheel to rotate to generate inertial force, and vibration energy is absorbed; and the particles in the compartments of the flywheel move along with the flywheel and collide and rub with other particles and the energy dissipation layers to consume energy of the particles, and thus the purpose of energy dissipation is achieved. The built-in compartment type particle inertial-capacitance damper has the multiple functions of inertial-capacitance energy absorption, friction energy dissipation, multi-frequency tuning and the like, and vibration between structures under the effects of wind loads, earthquakes, blasting impact and the like can be effectively reduced.
Owner:BEIJING UNIV OF TECH
Power transmission tower cross arm structure with vibration reduction and energy consumption functions
ActiveCN112112474AGuaranteed functionUse function does not affectTowersShock proofingTransmission towerGusset plate
The invention provides a power transmission tower cross arm structure with vibration reduction and energy consumption functions. An energy consumption element is formed through a spring-damper combined component, the effect of consuming vibration energy transmitted by a main material of a power transmission tower body is achieved, and the overall dynamic response of the tower body is reduced; in addition, the spring-damper combined component, an upper chord, vertical rods, inclined rods and a lower chord jointly form a new energy consumption system of the cross arm structure, a plurality of sets of vertical rods and inclined rods are connected in an end-to-end abutting mode and arranged between the upper chord and the lower chord in a staggered mode, and thus the cross arm structure has the using function; and in addition, the upper chord, the lower chord and a gusset plate are movably connected, thus the whole system is easy to install, has high structural safety and high reliabilityand does not affect the using function of a cross arm.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
Novel space grid structure ball joint device with damping function
ActiveCN106930590AEasy constructionThe damping effect hasBuilding constructionsProtective buildings/sheltersDamping functionEngineering
The invention relates to a novel space grid structure ball joint device with a damping function. The novel space grid structure ball joint device comprises a joint ball and rod pieces connected with the joint ball and further comprises a damper located in the joint ball. The damper comprises an oil cylinder, an oil cylinder top cover, soft steel connected with the oil cylinder top cover, a piston and a piston rod. The other end of the soft steel is connected with the piston. One end of the piston rod is connected with the piston, and the other end of the piston rod is connected with one of the rod pieces. The soft steel and the piston are placed in the oil cylinder. The lower end of the oil cylinder is connected with a mounting hole in the joint ball. According to the characteristic that the interior of a hollow steel ball joint used in a space grid structure is provided with available space, the problem of under damping of the space grid structure is solved, and construction and mounting is easy and convenient. The effect of earthquakes is reduced by adding damping energy dissipation of the space structure, and accordingly anti-seismic capacity of the space structure is improved.
Owner:INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
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