20 results about "Transverse stiffness" patented technology

A medical probe is presented including an expandable basket assembly coupled to a distal end of a tubular shaft. The basket assembly includes a cloverleaf cutout structure at its distal end and spines extending proximally from the cloverleaf structure and coupling to the tubular shaft. The cloverleaf structure includes a sinusoidal-like member extending from one spine to an adjacent spine in a direction around the longitudinal axis. Dimensions of the sinusoidal-like member can be configured to provide a lateral stiffness of the expandable basket assembly within a predetermined range and a maximum peak stress during retraction of the expandable basket assembly into an intermediate catheter such that the maximum peak stress is less than a predetermined threshold.

The invention discloses a compact transverse stable vertical ultralow frequency three-way limiting marine airbag vibration isolator which comprises an upper cover plate, a lower cover plate, a middle limiting ring, an elastic limiting layer and rubber bag bodies, and a multi-closed cavity structure is formed among the rubber bag bodies through the upper cover plate, the lower cover plate and the middle limiting ring; the upper cover plate and the lower cover plate are respectively provided with an elastic limiting layer, the elastic limiting layers and the middle limiting ring form a three-way limiting structure, vertical stretching, compression and transverse displacement of the rubber air bag are limited, and therefore three-way limiting of the rubber air bag body is achieved. The air bag vibration isolator for the ship can be applied to various mechanical equipment with vibration reduction requirements, and has the advantages of being small in structural size, low in vertical frequency, large in transverse rigidity, capable of achieving three-direction limiting, safe, reliable, good in system stability and the like.

The invention relates to the technical field of large storage structures, and discloses a steel silo structure and a construction method thereof.The steel silo structure comprises a top silo body, a bottom silo body, a plurality of first plate rib units and a plurality of first plane truss units; the annular bin body is connected to the lower portion of the top bin body and comprises a plurality of second plate rib units and a plurality of second plane truss units, each second plate rib unit is arranged in a triangular shape, every two adjacent second plate rib units are connected, and every two second plane truss units are oppositely arranged; the top ends of the second plane truss units which are oppositely arranged in pairs are connected with the two ends of one first plane truss unit correspondingly, and a plane door type truss structure is formed. By arranging a plurality of plane door type truss structures in the circumferential direction, the effect of increasing the transverse rigidity can be achieved, the multi-dimensional lateral rigidity is ensured, the overall ultimate bearing capacity is improved, and the structure can be applied to silo projects with larger scale sizes.

The application discloses a stiffness matching method of a frequency-variable stiffness rotary arm joint, which comprises adding different structures in the longitudinal and vertical directions of a liquid rubber composite joint shaft, so that different longitudinal, vertical and transverse stiffnesses and a lower longitudinal-transverse stiffness ratio are obtained, and relates to the technical field of locomotive component manufacturing. The application provides a stiffness matching method and structure of a frequency-variable stiffness rotary arm joint, different main body structures are formed by means of twice adding materials, longitudinal, transverse and vertical stiffnesses are quickly adjusted, and project research and development cost is saved and product development period is shortened.

A medical probe is presented including an expandable basket assembly coupled to a distal end of a tubular shaft. The basket assembly includes a cloverleaf cutout structure at its distal end and spines extending proximally from the cloverleaf structure and coupling to the tubular shaft. The cloverleaf structure includes a sinusoidal-like member extending from one spine to an adjacent spine in a direction around the longitudinal axis. Dimensions of the sinusoidal-like member can be configured to provide a lateral stiffness of the expandable basket assembly within a predetermined range and a maximum peak stress during retraction of the expandable basket assembly into an intermediate catheter such that the maximum peak stress is less than a predetermined threshold.

A space spiral compliant mechanism with a variable stiffness characteristic comprises a variable stiffness assembly, a bending assembly and a fixed base, the variable stiffness assembly comprises a rigid element, two first leaf-shaped flexible hinges and a variable stiffness module, and the two first leaf-shaped flexible hinges are oppositely arranged; the two opposite ends of the two first leaf-shaped flexible hinges are connected with the rigid element and the fixed base correspondingly, the rigid element, the two first leaf-shaped flexible hinges and the fixed base define a containing space, a variable-rigidity module is arranged in the containing space, a containing groove is formed in the fixed base, and the bending assembly is connected with the inner wall of the containing groove. According to the invention, the rotation angle of the variable stiffness module is controlled through the input displacement of the driver, the continuous and accurate adjustment of the transverse stiffness of the rigid element can be realized, and a proper stiffness value can be quickly adjusted according to different working requirements; and the adaptability of the spatial spiral compliant device is greatly improved.

The invention relates to a mechanism (1) with variable stiffness. It comprises a plurality of solid, discrete elements (2) arranged at least in series and at least one connector (3) interconnecting elements. The at least one connector is configured to apply a tensional force (F) of variable size between the series of elements, so that by varying the size of the tensional force, at least the transversal stiffness of the mechanism is varied accordingly. The mechanism constitutes a pivoting system with equilibrium defined by the shape of the elements. The mechanism is configured to adapt to externally applied interaction forces during use by adjusting the tensional form force applied by the connector in response to the applied interaction forces.

The utility model discloses an integrally formed ship, including ship body, this ship body includes bow, ship body and stern, and ship body includes bottom shell and is connected to the ship wall of bottom shell both sides, still is equipped with a plurality of hollow muscle strips of integrally forming on bottom shell and extending along the length direction of ship body in the ship body, and the both ends of each hollow muscle strip are integrally formed in bow and stern. Meanwhile, the gap is formed between the adjacent hollow muscle strips, and is filled with elastic sealing element in the gap, to promote the longitudinal strength and transverse rigidity of ship body through the common effect of hollow muscle strip and elastic sealing element. Through the above design, the problem that the longitudinal bending strength and transverse torsional rigidity of the ship body of the present integrally formed ship caused by the hollow cavity structure is insufficient is effectively overcome, thereby the overall integrity of the ship body can be significantly enhanced, which can more effectively resist the bending moment and torsional load generated during navigation, prevent the deformation and tremor of the ship body, and finally improve the stability, safety of navigation and the comprehensive performance of the ship body.

The utility model discloses a tire crown anti-breaking block structure, and relates to the technical field of tires. According to the technical scheme, the tire comprises a plurality of reinforcing layers which are arranged on the crown of the tire at intervals in the circumferential direction, the reinforcing layers are arranged on the outermost belted layer and located at the bottoms of transverse pattern blocks, longitudinal pattern grooves are formed between the transverse pattern blocks in the radial direction of the tire, and the reinforcing layers transversely cover all the longitudinal pattern grooves. According to the utility model, the pattern change is reduced as much as possible, and the discontinuous reinforcing layer is embedded under the pattern block, so that the overall rigidity of the pattern is increased, the overall transverse rigidity of the pattern is enhanced, the transverse deformation of the pattern is reduced, and the purpose of reducing crown block breaking is achieved.

The invention discloses a sandwich composite material light high-strength wing rib and an integral forming method. The wing rib comprises an annular web plate, a peripheral surface layer, a web plate edge strip, a connecting area turned-over edge, a connecting area surface layer and a plurality of wing rib supporting rods. The annular web is of a sandwich structure and is matched with the surface layer composite materials on the two sides, the transverse rigidity is improved, the problems of loading instability and S-shaped bending of an existing wing rib are solved, the characteristics of light weight and high strength are achieved, and the strict requirements of solar airplanes and the like are met. The flanging edge strip, the web edge strip and the connecting area flanging are integrally formed by a surface layer composite material, so that the structural integrity and the damage resistance are enhanced; the surface layer of the connecting area is fixed to the spar, and the connecting area turnup improves the fitting degree and the bonding strength. The two ends of the wing rib supporting rod are clamped between the surface layers on the two sides of the web edge strip, the risk of secondary bonding and splitting is avoided, and the bearing capacity is further enhanced.

The utility model discloses an air spring with the ratio of transverse rigidity to vertical rigidity larger than 1, which comprises a bag skin, an upper cover and a piston which form a closed cavity, the closed cavity is filled with gas with set pressure so as to enable the bag skin to expand, the periphery of the upper cover is connected with an outer sleeve part, and the outer sleeve part extends vertically and wraps the outer side wall part of the bag skin. The air spring is provided with the outer sleeve piece, the air spring generates transverse rigidity through the interaction force between the outer sleeve piece and the expansion bag skin, the transverse rigidity of the air spring can be adjusted by adjusting the vertical height of the outer sleeve piece, and then the ratio of the transverse rigidity to the vertical rigidity of the air spring is larger than 1. The transverse stroke and the vertical stroke of the air spring are both large, rigidity sudden change does not exist in the operation process, and the overall stability is good. The air spring is simple in overall structure and low in production cost, the fatigue life of the bag skin of the air spring can be prolonged through shape optimization of the outer sleeve piece, and reliability is improved.

The application discloses a track beam combined structure suitable for straddle type monorail, which comprises a steel structure longitudinal beam and a prefabricated track beam, both sides of the steel structure longitudinal beam are provided with transverse bulkheads, the prefabricated track beam is connected with the transverse bulkheads through a connecting piece, the prefabricated track beam is a horseshoe structure and internally provided with a long circular hole which is hollowed out in the middle, the structure is simple and reasonable, the rigidity of the prefabricated track beam can be improved, the space for arranging the longitudinal prestressed steel strands of the bottom plate can be increased, the chamfering of the widened part and the web plate can reduce the stress concentration of the prefabricated track beam, the insufficient transverse rigidity of the straddle type monorail track beam can be solved, the driving comfort can be influenced, and the investment cost of the evacuation platform can be reduced.

The present application relates to the technical field of flexible strain measurement, and discloses a flexible sensing module for measuring the spatial curvature of a continuum mechanism and a manufacturing method thereof, which comprises a flexible substrate and a sensing array module arranged in the flexible substrate in a determined direction; after the flexible sensing module is wrapped on the surface of the continuum mechanism, the axial tensile strain or the axial 45-degree angle shear strain at different positions on the surface of the continuum mechanism is measured by each strain sensing unit, then the bending deformation and the torsional deformation of the measurement interval covered by the flexible sensing module are calculated by combining the deformation continuity of the continuum mechanism, and the spatial curvature distribution of the continuum mechanism is fitted and reconstructed. Based on the capacitive in-plane strain sensing element of the flexible substrate and combined with the design of the lateral stiffness enhancement structure, the one-directional large tensile strain measurement with low cross-interference of the sensing site is realized, thereby increasing the accuracy and the range of the curvature measurement of the continuum mechanism.

The invention provides a vibration reduction fastener with a transverse rigidity hierarchical structure, which comprises a baffle table, a baffle shoulder and a transverse baffle block, the transverse baffle block is positioned between the baffle table and the baffle shoulder, the transverse baffle block is one of an integrated structure and a composite structure, and when the transverse baffle block is of the integrated structure, the transverse baffle block is fixed on the baffle shoulder. The transverse stop block at least comprises a first plane, a second plane, a third plane and a first groove, the first plane makes contact with the stop table and is connected with the second plane through the first groove, the second plane is connected with the third plane through the first groove, the height difference between the second plane and the first plane is h1, and the height difference between the second plane and the third plane is h2. The height difference between the third plane and the first plane is h2, and h1 is smaller than h2. According to the horizontal check block, the horizontal rigidity grading response is achieved by arranging the planes with different height differences, the first grooves are formed between the adjacent rigidity subareas and used for providing the containing space when the upper-level subarea deforms, and it is guaranteed that rigidity transition is smooth, and grading response is clear.

The invention relates to the technical field of flexible strain measurement, and discloses a continuum mechanism space curvature measurement flexible sensing module and a manufacturing method, and the continuum mechanism space curvature measurement flexible sensing module comprises a flexible substrate and sensing array modules arranged in the flexible substrate according to a determined direction; after the surface of the continuum mechanism is coated with the flexible sensing module, axial tensile strain or axial 45-degree shear strain at different positions of the surface of the continuum mechanism is measured through the strain sensing units, and then bending deformation and torsional deformation of a measurement interval covered by the flexible sensing module are calculated by combining deformation continuity decoupling of the continuum mechanism. And the space curvature distribution of the continuum mechanism is fitted and reconstructed. On the basis of a capacitive in-plane strain sensing element of a flexible substrate, in combination with the design of a transverse rigidity enhanced structure, single-direction large tensile strain measurement with low cross interference of a sensing site is realized, so that the accuracy and the measuring range of curvature measurement of a continuum mechanism are increased.

A large-lift-side-ratio half-mould balance structure with low temperature influence belongs to the technical field of wind tunnel test, and aims to solve the problem of the decline of force measurement accuracy caused by the temperature influence on the existing half-mould balance.The free part, the middle reinforcing table and the fixed part are coaxially and spacedly arranged from top to bottom, the free part and the middle reinforcing table are connected through upper balance elements, the middle reinforcing table and the fixed part are connected through lower balance elements, the upper balance elements include four multi-piece support beams and two T-shaped measuring beams, the multi-piece support beam is composed of a plurality of rectangular thin sheets with opposite end faces and arranged in left and right intervals, the T-shaped measuring beam includes a first vertical beam and a thin sheet disturbance horizontal beam arranged on the left and right, and the upper end of the first vertical beam is connected with the middle part of the thin sheet disturbance horizontal beam.The length-width ratio of the rectangular thin sheet can be adjusted to change the longitudinal and transverse stiffness ratio of the multi-piece support beam, so as to amplify the lateral force strain output of the T-shaped measuring beam and avoid the influence of temperature on the measurement result.

The invention relates to the technical field of framework assembling and machining, in particular to a marine composite material laminated structure which comprises an outer skin, and an inner skin is attached to the surface of one side of a damping layer. The composite material laminated structure for the ship is composed of the outer skin, the anti-stripping reinforcing layer, the sandwich layer, the damping layer and the inner skin, longitudinal bending, shearing and transverse rigidity improvement are achieved through the multi-direction reinforced outer skin, and the anti-stripping reinforcing layer forms resin anchoring points through a thermoplastic fiber thin net; the sandwich layer is designed through gradient partitions with different densities and thicknesses, so that a high-load area has higher compression resistance and bending resistance, a low-load area realizes light weight, the stress of the sandwich structure is effectively optimized, the longitudinal overall rigidity is improved, local crushing is prevented, and meanwhile, the strength of the sandwich structure is improved. A longitudinal drainage channel is arranged in the sandwich layer and corresponds to the inspection hole, so that drainage, ventilation and internal damage detection can be realized.

The invention discloses a method for controlling the critical rotating speed of a rotor by adjusting the rigidity of a bearing supporting system, and relates to the field of heavy rotating equipment with a bearing support. The method for controlling the critical rotating speed of the rotor by adjusting the rigidity of the bearing supporting system comprises the following steps that a rigidity model of the bearing supporting system is built, a rigidity calculation point is marked as O1, and supporting points at the two ends are marked as O2 and O3; collecting the distance a between the O1 and the O2, and collecting the distance b between the O1 and the O3; the bearing rigidity K2 at the O2 position is collected, and the bearing rigidity K3 at the O3 position is collected; according to a, b, K2 and K3, the bearing supporting rigidity K0 at the position of O1 is obtained; the rigidity KM1 borne by the mass M1 at the position O1 is obtained according to the bearing supporting rigidity K0 at the position O1 and the transverse rigidity K1 of the shaft at the position O1; and obtaining the critical rotating speed of the rotor according to the M1 and the KM1. According to the method, the rigidity borne by the mass of the point is calculated, the critical rotating speed of the rotor is obtained, the critical rotating speed of the rotor can be controlled by adjusting the rigidity of a bearing supporting system, and resonance is avoided.

The utility model belongs to the field of rail transit vibration damping fasteners, and discloses a rigidity-adjustable vibration damping fastener, which sequentially comprises an upper iron plate, upper iron plate retaining shoulders arranged at two ends of the upper iron plate, an under-plate elastic base plate and a lower iron plate along a rail falling direction, and lower iron plate retaining shoulders arranged at two ends of the lower iron plate. According to the utility model, the under-plate elastic base plate, the upper iron plate, the lower iron plate and the transverse stop block are arranged, so that the fastener has large vertical displacement and low rigidity, the transverse extrusion rigidity and the shearing performance are ensured, and the combined damping effect of a compression type structure and a shearing type structure is achieved; the upper iron plate shoulder retaining part, the transverse stop block and the lower iron plate shoulder retaining part are sequentially matched, and it is guaranteed that the fastener has high transverse rigidity under low-vertical-rigidity movement.