18results about How to "Improve local stiffness" patented technology

The present invention relates to the field of centrifuge structure, and specifically discloses a roll frame for a high-g value three-degree-of-freedom centrifuge, comprising a frame, wherein the frame is an octagonal annular cavity surrounded by an outer skin outer ring, an inner skin inner ring and a cover plate; the frame is symmetrically provided with two roll axis mounting holes, wherein a small shaft sleeve is provided in the roll axis mounting hole, and the side wall of the frame perpendicular to the line connecting the two roll axis mounting holes is provided with two pitch axis mounting holes, wherein a large shaft sleeve is provided in the pitch axis mounting hole; and a plurality of threading tubes are provided in the cavity between the outer skin and the inner skin. The advantages of the present invention are that the roll frame's outer shape structure, box cross-sectional structure, local structure and wiring method are improved and designed to improve the roll frame's overload resistance, rigidity and load-bearing capacity, and reduce the eccentricity of the roll frame, so that it can be used in a high-g value three-degree-of-freedom centrifuge.

The invention relates to the technical field of battery packs, and discloses a bottom protection structure for a battery pack and the battery pack, the bottom protection structure for the battery pack comprises a liquid cooling plate, a bottom protection plate and a buffer layer; the bottom of the liquid cooling plate comprises a non-flow channel area and a protruding flow channel area; the bottom protection plate is arranged at the bottom of the liquid cooling plate, and the bottom protection plate and the liquid cooling plate are arranged at intervals; the buffer layer is arranged between the liquid cooling plate and the bottom protection plate, and the bottom of the buffer layer abuts against the bottom protection plate; in the flow channel area, the top of the buffer layer abuts against the liquid cooling plate; according to the present invention, the impact force can be effectively absorbed and dispersed when the different regions of the battery pack are impacted so as to ensure that the battery cells in the battery pack are not extruded when the battery pack is subjected to the external force effect, such that the battery pack can be prevented from being damaged, and the battery pack is prevented from being damaged. And the protection level of the battery cells in the battery pack is improved, and the overall safety of the battery pack is ensured.

The utility model discloses a kind of aluminum alloy ship body welding deformation control mechanisms, including multiple webs, web is welded at the welding gap of first ship plate and second ship plate, web is vertically arranged with the surface of first ship plate and second ship plate, the length direction of web is perpendicular to the welding gap of first ship plate and second ship plate, web bottom is provided with the bottom edge of widening to both sides, and welding groove is spaced along bottom edge;Welding groove is distributed at the contact of bottom edge and ship plate, the cross section of welding groove is arc, the bottom end of welding groove and ship plate smooth transition tangent contact;Connecting fixing mechanism is equipped between adjacent webs;By web auxiliary material positioning welding, increase auxiliary material in the relatively sparse area of original structure, by positioning welding mode welding, keep the structure of original strong force component unchanged, auxiliary increase the overall stress of sparse and weak area, welding is more stable and reliable, not easy to weld deformation.

The present invention provides a rear side panel structure of a vehicle and a vehicle, wherein the rear side panel structure of the vehicle comprises: a D-pillar; a rear side panel outer panel connected to the D-pillar; a rear side panel connecting plate connected to the rear side panel outer panel, a gap is formed between the rear side panel connecting plate and the D-pillar, and a pressure relief valve installation port is formed on the rear side panel connecting plate; a rear side panel bracket is arranged on the rear side panel connecting plate, and the rear side panel connecting plate is connected to the D-pillar through the rear side panel bracket; wherein the rear side panel bracket is arranged close to the pressure relief valve installation port. The rear side panel structure of the vehicle provided in the embodiment of the present application can establish a connection between the rear side panel connecting plate and the D-pillar by using the rear side panel bracket, specifically improve the local stiffness of the rear side panel connecting plate at the pressure relief valve installation port, improve the vibration of the rear side panel connecting plate, reduce the vibration transmission effect of the rear side panel connecting plate, improve the overall stiffness and NVH performance of the rear side panel structure of the vehicle, improve the noise perception of the driver and passengers, and improve the user experience of the vehicle.

The present application belongs to the field of high-speed aircraft air inlet structure design, and particularly relates to a high-speed aircraft air inlet radial thermal stress mitigation design method. The method comprises: step one, releasing the air inlet mechanical connection freedom by adjusting the first air inlet parameter; step two, reducing the local stiffness of the air inlet by adjusting the second air inlet parameter; step three, performing thermal coupling calculation, checking the thermal stress level and thermal deformation level of the air inlet, and judging whether the air inlet meets the strength and stiffness requirements; if so, outputting the air inlet parameters that meet the strength and stiffness requirements; if not, increasing the local stiffness of the air inlet by adjusting the third air inlet parameter, and returning to step two. The air inlet structure obtained by the present application can achieve thermal stress mitigation while meeting the requirements of thermal deformation.

The invention relates to a rear floor reinforcing structure provided with two rows of seats and a vehicle, and the rear floor reinforcing structure comprises a vehicle body chassis which comprises a left rear longitudinal beam assembly, a right rear longitudinal beam assembly and a rear floor middle cross beam assembly, the left rear longitudinal beam assembly and the right rear longitudinal beam assembly are longitudinally arranged, and the rear floor middle cross beam assembly is transversely arranged and fixedly connected between the left rear longitudinal beam assembly and the right rear longitudinal beam assembly; and the rear floor assembly comprises a rear floor fixed above the rear floor middle cross beam assembly and two rows of seat reinforcing beams fixed at the top of the rear floor, and the two rows of seat reinforcing beams are positioned right above the middle part of the rear floor middle cross beam assembly. The two-row seat reinforcing beam is designed on the top face of the rear floor and located at the position of the rear installation point of the two-row seat, and the two-row seat reinforcing beam and the rear floor are welded to form the rear floor assembly. And the rear floor middle cross beam assembly is welded with the rear floor assembly, so that the rear floor assembly is connected with the rear floor middle cross beam assembly to form a stable structure, and the structural strength of the rear mounting point of the two rows of seats is ensured.

The present invention relates to the field of stratospheric airship structures, and discloses a partially rigid stratospheric airship, comprising: a soft airship, comprising an outer bladder (7); a plurality of reinforcement rings (3), the plurality of reinforcement rings (3) being fixed in parallel to the outer surface of the outer bladder (7), each reinforcement ring (3) being in a circular ring shape, the center of which is located on the longitudinal axis of the soft airship; a plurality of lashing ropes (15); and a plurality of first bow ties (14), each first bow ties corresponding to a lashing rope; every two first bow ties are respectively arranged on both sides of the reinforcement ring and fixed on the outer surface of the outer bladder, one end of the lashing rope is lashed to the first first bow ties, and the other end is lashed to another lashing rope. The present invention can effectively maintain the shape of the airship and reduce the weight by adding reinforcement rings to the soft airship.

The invention relates to the technical field of bridges, and discloses a novel dense beam plate truss combined bridge deck system which comprises two chord members arranged in parallel and level, and the chord members and truss nodes are connected to form a continuous structure in the bridge direction. A plurality of cross beams are arranged between the chord members at intervals, and each cross beam comprises a cross beam upper wing plate, a cross beam lower wing plate and a cross beam web stiffening rib; a cross beam web plate is mounted between the cross beam upper wing plate and the cross beam lower wing plate, and the cross beam web plate and the cross beam web plate stiffening rib are connected with each other; a bridge deck slab is arranged above the cross beam, and longitudinal stiffening ribs and a transverse connecting plate are arranged below the bridge deck slab. The truss node area is not provided with a cross beam, so that the connecting structure of the truss node area is simplified, the fatigue details of the node area are reduced, and the risk of fatigue cracking of the node area is reduced; cross sections and sizes of the beams of the bridge deck system are consistent, rigidity differences of the beams are small, distribution of loads on the bridge deck system is more uniform, and the beams are arranged in a fish belly mode so that local rigidity of the bridge deck system can be improved.

The utility model discloses a kind of sealing plate and battery for battery shell sealing, at least one exhaust hole is equipped on the sealing plate, and protruding reinforcing rib is arranged in the surrounding area of the exhaust hole;The protruding direction of the reinforcing rib is towards battery interior, to form the gas permeation gap for the ventilation of battery inner cavity and the exhaust hole between the sealing plate and tab.This utility model sets reinforcing rib in the surrounding area of exhaust hole on sealing plate, so that tab can only form local attachment with the surface of sealing plate after bending, not complete attachment exhaust hole area, to form gas permeation gap between tab and reinforcing rib.Because when the gas pressure in battery is increased, gas diffuses to exhaust hole through gas permeation gap, avoid gas discharge obstruction, improve the safety performance of battery.In addition, the setting of reinforcing rib can also improve the local rigidity of sealing plate, prevent mechanical deformation.

This utility model relates to a prefabricated steel bracket and rectangular pier support clamp connection device, comprising ear plates, I-beams, threaded steel bars, locking nuts, and a spacing adjustment mechanism. Two pairs of I-beams are respectively arranged on one side of the rectangular pier column facing the steel bracket. Their ends are connected by threaded steel bars and tightened with locking nuts to form a rectangular frame clamp structure, which hugs the periphery of the rectangular pier column. Ear plates are respectively installed on both sides of the opposite surfaces of the I-beams and the steel bracket. The spacing adjustment mechanism is movably installed between the corresponding ear plates to connect the steel bracket and the rectangular frame clamp structure, forming an integral structure. This utility model has a simple structure, is easy to manufacture and install, has a high turnover rate, and helps to reduce construction costs.

The utility model belongs to the technical field of carriages, and discloses a carriage wallboard and floor connecting structure which comprises a floor, a wallboard, a sleeve assembly, a corner connector and a connecting assembly, a first fixing piece is fixedly connected to a floor body, and a second fixing piece is fixedly connected to a wallboard body. The lap joint face of the second fixing piece is fixedly connected with the contact face of the first fixing piece through filling glue, the sealing performance between the floor and the wall plate is improved, loosening, abnormal sound and cracking caused by vibration of a carriage are restrained, and the first sleeve and the second sleeve are fixedly embedded in a first connecting hole of the floor body and a first fixing hole of the second fixing piece correspondingly. The corner connector is arranged between the floor body and the second fixing piece, the first connecting piece penetrates through a first through hole of the corner connector and is fixedly connected to the first sleeve through thread glue, the second connecting piece penetrates through a second through hole of the corner connector and is fixedly connected to the second sleeve through thread glue, looseness after threaded connection is prevented, water vapor is prevented from permeating through the sleeves, and electrochemical corrosion is reduced.

The invention discloses an assembly type frame structure and a crane, the assembly type frame structure comprises a box-shaped frame body, the box-shaped frame body comprises a frame front section, a frame rear section and a frame rear section, the frame front section is provided with a first end and a second end which are oppositely arranged; the frame rear section is provided with a first end and a second end which are oppositely arranged; the frame middle section is located between the second end of the frame front section and the first end of the frame rear section, and the frame front section, the frame middle section and the frame rear section are sequentially arranged and connected end to end; the frame middle section is connected with the frame front section or the frame rear section through a sleeve connecting assembly, the sleeve connecting assembly comprises a tubular shaft and a sleeve, and the sleeve connecting assembly is provided with a T-shaped thread adjusting assembly located at the insertion end of the tubular shaft. The T-shaped thread adjusting assemblies generate axial displacement through mutual rotation to adjust the axial gap between the frame middle section and the frame front section or the frame rear section. The front part and the rear part of the frame are connected into a whole, local torsion of the tail part of the frame is allowed, and the displacement difference between the left side and the right side of the vehicle is buffered.

This invention discloses an additive manufacturing-based inertial amplification nonlinear low-frequency vibration isolation metamaterial structure, vibration isolation device, and its performance control method. The vibration isolation metamaterial structure includes a rhombic frame structure, an inertial amplification unit, and a square spring structure. The square spring structure is arranged within the rhombic frame structure, with its two ends connected to a pair of opposite corners of the rhombic frame structure. The elastic extension direction of the square spring structure is parallel to the diagonal of this pair of opposite corners of the rhombic frame structure. The inertial amplification unit has a centrally symmetrical structure, including a rigid rod, two counterweights, and two diagonal rods. The center of symmetry of the inertial amplification unit, the center of the rhombic frame structure, and the center of the square spring structure all coincide in projection. Therefore, the vibration isolation metamaterial structure of this invention significantly widens the bandgap range and enhances low-frequency vibration isolation performance, exhibiting excellent performance in suppressing longitudinal waves in the 0-1000Hz low-frequency range, increasing vibration damping, and energy absorption.

This invention discloses a flexible assembly fixture and method for aircraft winglets, comprising: a robot and an end effector, a fixture frame, positioning pins, positioning-clamping components, an interface plate, and a storage rack for the positioning-clamping components. The robot is used for automatic reconfiguration of the fixture; the robot's end effector is used for installing and removing the positioning-clamping components; the fixture frame is welded from columns and beams, with threaded holes distributed on each column and beam for mounting components; the positioning pins are installed on the fixture frame through the threaded holes; the positioning-clamping components are installed on the fixture frame through the interface plate to position and clamp the winglets; the interface plate is installed on the main fixture frame through the threaded holes; unused positioning-clamping components can be placed in its storage rack. This invention has the advantages of intelligent reconfigurability, high automation, adaptive support, and stable clamping, and is suitable for the assembly needs of various winglet specifications.

The utility model discloses a steel-UHPC prefabricated assembly type arc-shaped arch rib and an arch bridge, and relates to the technical field of suspender arch bridges, the steel-UHPC prefabricated assembly type arc-shaped arch rib comprises a plurality of prefabricated rib sections, and each prefabricated rib section comprises a built-in hollow thin-wall steel box body section and a UHPC outer box body section wrapping the periphery of a hollow thin-wall steel box body. The two ends of the hollow thin-wall steel box body sections extend out of the UHPC outer box body sections, shear nails used for being embedded in the UHPC outer box body sections are arranged on the hollow thin-wall steel box body sections, and the multiple prefabricated rib sections are sequentially spliced in the arc direction and connected through UHPC wet joints to form the arc-shaped arch rib. According to the steel-UHPC prefabricated assembly type arc-shaped arch rib, the self-weight is light, the applicable arch bridge span is larger, the structure is lighter, the local rigidity of the steel structure can be effectively enhanced by adopting the externally-wrapped UHPC layer, the hollow thin-wall steel box body sections can serve as templates for externally-wrapped concrete pouring, an inner mold is not needed, and the steel-UHPC prefabricated assembly type arc-shaped arch rib is simple in structure and convenient to use. And the prefabricated rib sections are convenient to construct and obtain.

This invention discloses a high-temperature micro-pressure sensor chip and its fabrication method, belonging to the field of MEMS piezoresistive micro-pressure sensor technology. The sensor chip includes a silicon substrate and a glass substrate bonded to the silicon substrate. The silicon substrate includes, from top to bottom, an embossed device layer, a pressure-bearing film, and a back cavity structure layer. The embossed device layer includes a cross-shaped isolation groove and edge isolation grooves connecting adjacent ends of the cross-shaped isolation groove. The area enclosed by the four edge isolation grooves is a deformation film. The cross-shaped isolation groove includes a first and a second isolation groove that intersect perpendicularly, with two piezoresistive strips arranged at the center of the cross-shaped isolation groove. Two piezoresistive strips are arranged at both ends of the first or second isolation groove. The four piezoresistive strips are connected to metal pads through metal leads to form a Wheatstone bridge. The back cavity structure layer includes several islands connected to the back of the pressure-bearing film. This sensor chip can measure micro-pressures at the Pa level and has high sensitivity and linearity.

The application relates to the field of bridge engineering and provides a layout method and a construction method of a shear connector of a fabricated steel-concrete composite girder bridge, which are based on machine-bridge coupling vibration response, a finite element model of a steel-concrete composite taxiway bridge is established, the influence of bolt cluster degree and unevenness parameters on the dynamic performance of the fabricated steel-concrete composite girder bridge is deeply studied, the layout mode of the shear connector is optimized, the vibration response under the machine-bridge coupling effect is effectively reduced, and the performance of the bridge structure under the action of the airplane dynamic load and the operation quality of the airplane are improved. Compared with the prior art, the application can significantly reduce the vibration response of the bridge under the airplane dynamic load, prolong the service life of the bridge, and improve the comfort of airplane operation. The technical scheme of the application provides a new theoretical basis and practical guidance for the design and construction of the steel-concrete composite girder bridge, and has important engineering application value and market promotion prospect.

The present application relates to corrugated paperboard processing technical field, especially to a kind of processing method for improving the breaking strength, interlayer adhesion and durability of corrugated paperboard, comprising the following steps: after core paper raw paper preheating, before corrugated roller pressing, and or, before the inner side surface of face paper and or back paper compound, line body reinforcing rib is applied;Core paper raw paper is pressed into corrugated core paper by corrugated roller;The peak top and two side slope areas of corrugated core paper are coated with permeable solidified nano composite high molecular emulsion;Face paper, back paper and corrugated core paper coated with nano composite high molecular emulsion are adhered and compounded using composite adhesive;The compounded paperboard is sent into drying section for solidification and setting, and corrugated paperboard is obtained;Without increasing raw paper basis weight and corrugated layer number, the breaking strength, interlayer adhesion and durability of corrugated paperboard are simultaneously improved by the synergy of line body reinforcing rib, nano composite emulsion and modified adhesive.