354 results about "Lateral stiffness" patented technology

A fastener for attaching a sheet-like implant to tissue or bone may be provided with a first arm having a proximal end and a distal end, a second arm having a proximal end and a distal end, and a bridge extending therebetween. Each of the first and second arms include a trunk portion defining at least a portion thereof, the trunk portion having a lateral extent larger than a lateral extent of the bridge or non-trunk portion of the arm adjacent thereto and can be mounted eccentrically to the bridge or non-trunk portion of the arm adjacent thereto such that the staple includes a first change in lateral stiffness disposed proximate the bridge or non-trunk portion of the arm abutment with the trunk. Fastener delivery devices and methods are also disclosed.

The invention discloses a buckling control support with diamond type energy dissipation units at the ends. The buckling control support is characterized by being composed of end restraint sections, energy dissipation sections and a straight supporting section, wherein the two ends of the buckling control support are connected with beam and column members or joints into a whole through high-strength bolts to achieve the purpose of improving the lateral stiffness of the members. The buckling control support with the diamond type energy dissipation units at the ends maintains resilience under the action of a small earthquake and enters a yield stage under the action of a medium earthquake or a major earthquake, and the effect of a damper can be achieved due to the good hystersis energy dissipation performance of the buckling control support. Compared with a traditional buckling control support, the procedures of adding a sleeve outside a core energy dissipation member, performing grouting and the like in the traditional manufacturing process are omitted in the manufacturing technology, and manufacturing is convenient; the support can be prefabricated in a factory, the member quality is guaranteed, the workload of site construction operation is reduced, and energy conservation and environment protection are achieved.

Embodiments of the present invention are directed to apparatus and methods of attenuating vibration, particularly for modern stepper machines and other types of vibration sensitive equipment. The attenuation system exhibits good vibration attenuation in the axial or support direction, and exhibits low or substantially zero lateral stiffness to prevent transmission of any vibrations between any of various portions of the machine. In one embodiment, an apparatus for attenuating transmission of lateral vibration between a first mass and a second mass comprises a vibration attenuation device including at least one bellows oriented along a support axis. The at least one bellows is connected between the first mass and the second mass and has an interior volume pressurized with a fluid to an internal fluid pressure which is greater than a zero-stiffness pressure such that the vibration attenuation device exhibits a negative lateral stiffness. A positive stiffness device is coupled between the first mass and the second mass. The positive stiffness device has a positive lateral stiffness which may be substantially equal to or greater than the negative lateral stiffness in magnitude.

The invention discloses a shear wall with a double-steel plate structure, which comprises steel plates, stiffening plates, connecting steel bars, and studs; the steel plates are spliced ​​by welding, and the opposite sides thereof are connected together by welding stiffening plates and connecting steel bars; Studs are welded on opposite sides of the inner steel plate and the outer steel plate; concrete is poured in the wall. This kind of structure can strengthen the lateral stiffness of the shear wall, and weaken the shrinkage and creep of the concrete when pouring concrete in the wall, so that the bearing capacity and ductility of the wall are significantly enhanced, and the seismic performance is improved. The invention also discloses a construction method for building the shear wall. Firstly, the processing unit is divided, and then the steel plate of the unit is hoisted on the installation foundation pre-embedded with the foundation embedded parts to form the wall, and then the verticality of the wall is corrected, and the wall joint is welded. , Concrete is poured on the wall; inner and outer operating platforms are also erected during construction.

There is provided a non-pneumatic tire which can eliminate a necessity of filling a pressurized air or other gases to obviate a possibility of decrease or loss of the internal pressure of the tire and which can easily provide desired vertical, longitudinal and lateral stiffnesses in a mutually independent state.The non-pneumatic tire has a rim member 1, a ring member 3 disposed at an outer circumferential side of the rim member 1 and provided with a tread 2 on a circumferential face, and a plurality of link mechanisms 4 coupling the rim member with the ring member. Each of the link mechanisms 4 consists of a pair of link members 7a, 7b consisting of a link 5a, 5b which is connected at a first end with a side portion of the rim member 1 and which is swingable in the circumferential and meridian directions and another link 6a, 6b which is connected at a first end with a side portion of the ring member and 3 which is swingable in the circumferential and meridian directions with second ends of the links being hingedly connected one another to make the links swingable in the meridian direction. A spring member 9 imparting a stiffness against relative displacements in the radian, circumferential and width directions with respect to the rim and ring members 1, 3 is provided on the link mechanisms 4.

The invention belongs to the structural engineering technical field, and more particularly relates to a structural system which cuts an energy-consumption steel plate wall in high level and vertically. The structural system consists of a wall, the two sides of which are connected with thin steel plates, which is taken as an energy-consumption component and other optional structural components; the system is provided with a steel plate wall which is connected with the two sides of a column in a run-through way in a certain intermediate span, and the steel plate wall is used in vertical cutting energy-consumption when the structure suffers from dynamic action such as earthquake or oscillating wind, etc. The horizontal anti-lateral force system of the structure can be the system of frame support, a frame steel plate wall, a frame combined wall, a concrete shear wall and a concrete shear cylinder, etc. The wall, the two sides of which are connected with thin steel plates, refers to the steel plate wall, the two sides of which are connected with the column or the wall; the structural system which cuts an energy-consumption steal plate wall in high level and vertically which is provided by the invention is a multiple high-level structural system which is suitable for an earthquake region; has the advantages of definite failure mode, high bearing capacity, large anti-lateral stiffness, concentrated damage and being convenient for reparation, etc.; has good earthquake-resistance performance and good capacities of tensibility and hysteresis energy-consumption; therefore, the structural system which cuts the energy-consumption steel plate wall in high level and vertically is a superior anti-earthquake and energy-consumption component.

A nuclear fuel assembly having improved dimensional stability to support aggressive fuel management wherein the fuel skeleton lateral stiffness is enhanced by the addition of a second joint attachment between the control rod guide thimble and spacer grid support sleeve.

A lateral collision is pre-detected and an integral lateral reinforcement structure is formed between both center pillars, thereby preventing an excessive deformation of the lateral vehicle body due to the exterior impact, protecting occupants from a direct impact by the deformation of the vehicle body, and greatly improving collision stability.

A foot plate for a prosthetic foot includes a sole plate and a layer with laterally variable stiffness disposed above the sole plate. The layer has a medial portion and a lateral portion. The lateral portion has a stiffness different than a stiffness of the medial portion, such as a greater stiffness to provide a relatively softer instep and a relatively stiffer out-step.

The invention relates to an assembly type ribbed steel plate shear wall with a frame, and belongs to the technical field of structural engineering. The assembly type ribbed steel plate shear wall with the frame comprises an embedded steel plate, frame columns, frame column partition plates, frame column connecting plates, connecting plates, transverse rib plates, vertical rib plates, frame beams, frame columns and frame column partition plates. In the assembly type ribbed steel plate shear wall with the frame, the embedded steel plate, the frame columns, the frame column partition plates, the frame column connecting plates, the transverse rib plates and the vertical rib plates are welded into a whole shear wall module in a factory; the connecting plates and the frame beams are welded integrally in the factory; the connecting plates are connected with the whole shear wall module through high-strength bolts and are not connected with the frame columns; the frame columns and the frame column partition plates are welded, and the frame beams and the frame columns are welded or connected through bolts or connected in a bolt-welding mixed mode. The assembly type ribbed steel plate shear wall has the advantages of being high in lateral stiffness, bearing capacity and ductility, good in anti-seismic property and easy to construct, holes can be formed flexibly, the construction period is shortened, and construction cost is reduced.

A pull cup in a vehicle door is fitted to a door trim panel substrate and is connected to the door inner sheet metal panel of the vehicle door by way of a bracket or by one of a pair of inner and outer support brackets. The pull cup is provided with a bending initiator feature which is positioned a trigger area formed in the door trim panel substrate. In the event that a horizontal force is applied to the vehicle door, the vehicle inward movement of the door inner sheet metal panel causes the pull cup to be pushed upward. The bending initiator feature pushes on the trigger area causing the door trim panel substrate to buckle, thus substantially preventing vehicle inward movement of the door trim panel substrate during the impact event. The bending initiator feature also reduces the lateral stiffness of the door trim sub-system.

A prosthetic foot includes an elongated foot member, extending between a toe section positioned at a toe location of a natural foot and a heel section positioned at a heel location of a natural foot. The elongated foot member also extends through an elevated arch section positioned between the toe section and heel section at an approximate arch location of a natural foot. An arch block is disposed below the elongated foot member under the elevated arch section. The arch block is sized and shaped to substantially fill a space or volume under the arch section. The arch block has geometric and physical properties that facilitate medial to lateral rotation to the prosthetic foot.

The invention discloses an assembled monolithic multilayer long-span bidirectional multi-span building with space steel grid box-type structures, which is characterized in that each layer of ground steel structural framework is formed into a single space steel grid box-type structure by a central cross-shaped single-layer steel grid wall frame, a surrounding single-layer steel grid-type outer wall frame and a top steel open-web sandwich plate floor frame, and the steel grid wall frames are respectively connected by small-sized assembly units prefabricated in a factory at the construction site by using high-strength bolts; all layers of single space steel grid box-type structures are upwards superposed layer by layer to form a superposed single barrel box-type structure; and four multilayer superposed single barrel box-type structures are connected with each other at the floor to form an assembled monolithic multilayer long-span bidirectional multi-span barrel bundle with the space steel grid box-type structures. According to the building disclosed by the invention, welding operations are not needed at the construction site, so that the fire hidden danger is eliminated. Compared with traditional steel framework structures, the construction cost of the steel structure is reduced by 15-20 percent, the construction progress is shortened by at least 1 / 3, and the resist lateral stiffness is increased by at least twice.

The invention relates to a stud connection-based steel-concrete composite beam calculation model analysis method. The method comprises the following steps of 1, building a stud shear connector composite beam calculation analysis model; 2, proposing that the overall shear stiffness Dsc of a stud comprises the shear stiffness Ds of the stud and the stiffness Dc of concrete in the range of a concentric circle with the diameter nds; 3, introducing a reduction coefficient beta of a working state of the overall shear stiffness of the stud to obtain equivalent lateral stiffness Deq; and 4, accordingto a lateral stiffness equivalence principle, making the stud equivalent to a short steel beam unit, and proposing that different values of the equivalent diameter deq of the short steel beam unit areused for simulating the mechanical performance of the stud in different working states. The method has the advantages that the calculation process is high in efficiency; a calculation result can quantitatively reflect interface slip of a steel-concrete composite structure and stress states of parts in stress periods of the composite structure; the practicality is high; and the method is easily understood and mastered by structure designers.

In the torsion beam axle suspension of the present invention, by providing mounts formed on one end of each of trailing arms with a three-dimensional slant angle, when a transverse force is applied to a turning outer wheel at a rear suspension during cornering of a vehicle, toe-in characteristics are induced, and at the same time a transverse rigidity of the mounts can be increased.

A structural member (38, 40) is designed to have a first portion having a first composite layup, a second portion having a second composite layup, and at least one center portion having at least a third composite layup such that it can flex near a desired point of the structural member. The structural member may be used as a chain stay (26) in a bicycle frame (10). The chain stays are designed to have a geometry that will allow for flexing or bending at or in the vicinity of a desired point. They may be pre-loaded for flex in both a positive and negative direction. The chain stays are designed having a varying cross sectional area. The bending or flexing location of the chain stays has a narrower height from the side view than the ends of the chain stay allowing the chain stay to flex. Additionally, the bending or flexing location has a wider width from the top view than the ends of the chain stay for additional torsional and lateral stiffness.

The invention provides a multi-high-layer assembly type steel structure frame-center supporting system, and belongs to the technical field of structural engineering. The system comprises assembly type beam-slabs, assembly type upright columns and profile steel inclined supports. Each assembly type beam-slab comprises a floor, a column joint and a hollow steel beam of a matched profile steel web member. The hollow steel beams are connected with the column joints, the floors are supported on the hollow steel beams, and each assembly type upright column is composed of a box-shaped column and a flange plate. During construction, the assembly beam-slabs and the assembly type upright columns are connected to form a frame structure, the profile steel inclined supports are arranged on the basis of the steel frame, and lateral stiffness of the structure is improved. All elements of the system are precast in factories and are rapidly assembled to form the structural system through bolts on construction sites. Concrete pouring and welding work are not needed, the defects that a traditional building is long in construction period, severe in material waste, severe in pollution during the construction process and the like are reduced, and factory integral production of the building can be achieved.

A tyre includes a tread provided with blocks formed among substantially longitudinal and transverse grooves, wherein among the blocks particularly broad intersections are formed, for example, by staggering substantially transverse grooves of circumferential rows axially in side-by-side relationship, of blocks with rounded corners, and wherein, inside such broad intersections, a stocky-shaped protrusion is arranged which has a lateral stiffness greater than the lateral stiffness of the surrounding blocks.

A vehicle suspension includes trailing arm assemblies that have one end pivotally mounted to a first suspension rail, an opposite end with an air spring support formed with the trailing arm, and an axle mount portion that is mounted to an axle beam. A Panhard arm provides lateral stiffness and includes a first pivotal connection to the trailing arm and a second pivotal connection to a second suspension rail laterally spaced from the first suspension rail.

A tension-based non-pneumatic structurally supported wheel with reduced lateral stiffness having a compliant tread band and a plurality of web spokes for bearing the load in tension extending transversely across and inward from a compliant tread band for attachment to a hub. The web spokes have an increasing draft angle and decreasing width as they extend from the compliant tread band to the hub reducing the lateral stiffness of the wheel thereby reducing steering force feedback to the steering mechanism.

The invention discloses a high-speed bogie dynamic design method based on an anti-snake movement frequency band energy absorption mechanism. A high-speed train is viewed as a closed-loop system, and advanced correction is conducted on an instable snake movement oscillating phenomenon of a bogie by means of an adaptive control mode. According to an anti-snake movement matching principle, an optimal distribution theoretical scheme of the bogie is determined. A novel anti-snake movement damper using a double-flow control principle is selected and used, a technical implementation mode of the novel anti-snake movement damper is worked out by using an anti-snake movement series stiffness judging principle, anti-snake movement is restrained softly, or an expansion bag is added into an auxiliary cavity. The dynamic performance assessment should have three stable features of a high-speed bogie. In order to lower lateral coupling strength, a train body model state form is reorganized to analyze aluminum alloy train body lateral coupled oscillation inherent features, the lateral stiffness of a suspension point is determined according to a harmonic vibration reduction mechanism, according to a structural damping constraint effect, the damping optimum value of rubber proportions is selected, a bolt pre-tightening or deadweight wedge-caulking rubber suspension mode is used, and therefore desired stable robust performance of bogie optimal match is achieved.

The invention discloses a buckling restrained steel plate shear wall with out-plane deformation space and belongs to the technical field of structural engineering. The shear wall comprises an embedded steel plate, concrete cover plates, edge members and at least eight longitudinal stiffening ribs, wherein the edge members comprise edge beams and edge columns; the embedded steel plate is fixedly connected with the edge beams; the longitudinal stiffening ribs are symmetrically fixed on two sides of the embedded steel plate; every two adjacent longitudinal stiffening ribs on the same side form a longitudinal stiffening rib group; the distance between every two adjacent longitudinal stiffening rib groups ranges from 200 to 300 mm; all the concrete cover plates are fixed on the embedded steel plate between the two longitudinal stiffening ribs of each longitudinal stiffening rib group through connecting pieces; clearances are reserved between the concrete cover plates and the edge members, the reinforcing parts of the longitudinal stiffening ribs and the embedded steel plates. The shear wall has higher lateral stiffness and later bearing capacity and can effectively dissipate earthquake energy under the action of a rare earthquake.