841results about "Tyre parts" patented technology

The invention discloses a tire finite element modeling and multidirectional rigidity optimization method and system based on characteristic lines. The method comprises the following steps: extracting tire section characteristic lines from a three-dimensional digital model; introducing the tire section characteristic line into a finite element analysis environment, generating a three-dimensional tire geometric model by rotationally scanning the characteristic line, and performing grid division on the model; setting tire material attributes, performing zoning setting on the model according to a tire crown, a tire shoulder and a tire side wall, and setting tire thickness based on zoning; applying a constraint boundary condition at the center of the tire, and establishing a contact form of the tread and the ground; a progressive inflation pressure load is applied, the deformation state of the inflated tire is calculated, and longitudinal rigidity, radial rigidity and lateral rigidity calculation and analysis steps are set; the tire elasticity modulus and the cord fabric thickness are used as design variables, and an optimization algorithm is adopted to solve a multi-objective optimization function. The method has the advantages of being simple in modeling method and high in practical operability, the tire modeling threshold can be lowered, and the fund and time cost of refined modeling is reduced.

A rubber coating for a radiofrequency identification device for a tyre characterized in that it comprises: (a) 100 phr of at least one diene-based elastomer; (b) at least one chemical according to formula (1) wherein the chemical comprises in its structure at least the structure of the 2,2′-methylenediphenol, and wherein the 2,2′-methylenediphenol may be substituted in ortho, para, meta position or any combination thereof with an aliphatic, linear or branched, hydrocarbon chain comprising from 1 to 10 C atoms, or may be polymerized in ortho, para, meta position or any combination thereof with one or more additional alkylphenol units. A radiofrequency identification (RFID) module for a tyre comprising a radiofrequency identification device surrounded by a rubber coating, a tyre or a tyre retread comprising such radiofrequency identification module, and use of a rubber coating for surrounding a radiofrequency identification device.

The invention belongs to the technical field of tire engineering design, and discloses an engineering tire belted layer end structure finite element design analysis method and system. Comprising the steps of obtaining and preprocessing tire carcass contour data and initial belted layer parameters, conducting belted layer end parametric modeling on the basis of a standardized tire geometric model, constructing a durability finite element analysis model to obtain a stress-strain distribution field, conducting multi-parameter sensitivity analysis to determine a key influence factor weight matrix, and obtaining a stress-strain distribution field. And optimally designing a belted layer end structure based on the matrix, and finally performing durability verification and evaluation. According to the method, through accurate geometric expression, flexible parametric modeling, accurate performance analysis and multi-objective optimization design, belted layer end stress distribution uniformization and structural rigidity optimization are achieved.

The invention provides an aircraft tire shoulder heat generation optimization method and system based on interlayer pixel-level modeling, and relates to the technical field of aircraft tires, and the method comprises the steps: outputting an interlayer pixel-level model; extracting basic parameters of a tire shoulder area; tire shoulder heat generation simulation is executed, and a tire shoulder area temperature distribution cloud picture is output; positioning the highest temperature extreme value and the coordinate position of the high-temperature accumulation area; taking minimization of the maximum temperature extreme value as a heat generation temperature optimization target, taking a condition that the area of a high-temperature accumulation area is smaller than 15% of the total area of a tire shoulder area as a heat generation range constraint condition, and setting a parameter adjustment vector array of basic parameters of the tire shoulder area; executing particle swarm iterative optimization, and outputting tire shoulder optimization correlation parameters; and outputting the thermodynamic optimization parameters of the tire shoulder. According to the method, the technical problem that the durability and the critical speed of the tire are finally affected due to the fact that a macroscopic model is mostly adopted for calculation in an aviation tire shoulder heat generation optimization method in the prior art, and a detailed physical process between different hierarchical structures is ignored is solved.

The invention relates to the technical field of tire simulation design, in particular to a radial tire contour rapid design and generation method and system and a computer program. According to the method, firstly, a finite element model is generated according to a material distribution diagram of an original tire, then tire outer contour parameters are adjusted according to a preset performance target, and a corresponding basic vector model is generated. The method comprises the following steps: extracting node information of an original model and a basic vector model, endowing a weight coefficient, and calculating a tire finite element model with target performance; and finally, determining an optimal weight coefficient by using an optimization algorithm, and generating a tire outer contour curve meeting performance requirements through curve fitting. According to the method, the design efficiency is remarkably improved, the dependence on the personal ability of designers is reduced, and more accurate and reliable tire optimization design is achieved.

The invention relates to the technical field of modeling, in particular to an automobile tire modeling method and system and a storage medium, and the method comprises the steps: 1, obtaining tire contour data; step 2, extracting tire cross-section image features: extracting feature vectors of the two-dimensional tire cross-section image based on the point cloud image, and calculating the distance between the feature vectors; the similarity between the images is judged based on the distance, and the tire point cloud is segmented into a tire surface point cloud and a pattern groove point cloud according to the similarity; step 3, constructing a tread point cloud mapping matrix; 4, fitting a pattern boundary curve; step 5, determining the distribution of a tire material layer: segmenting the tire material layer by using a DeepLabV3 +-based network structure in combination with geometric features obtained from the tread point cloud mapping matrix to obtain the distribution condition of the tire material layer; and step 6, training and verifying the model, and obtaining an automobile tire finite element model after verification is passed. The precision of the finite element model of the automobile tire is improved.

The invention discloses a gradient negative Poisson's ratio non-pneumatic tire rigidity prediction method which comprises the following steps: creating a negative Poisson's ratio non-pneumatic tire model in finite element simulation analysis software, setting material attributes of a negative Poisson's ratio non-pneumatic tire, carrying out grid division on the model, establishing a static force general analysis step in an analysis step module of the software, and carrying out static force general analysis on the negative Poisson's ratio non-pneumatic tire. Setting load and boundary conditions; carrying out static simulation analysis on the non-pneumatic tire, and researching the influence of structural parameters on the performance of the negative Poisson's ratio non-pneumatic tire; carrying out sensitivity analysis on the rigidity of the tire according to four structural parameters of the tire, namely the gradient of the support body, the thickness of the support body, the thickness of the tread and the thickness of the reinforcing layer; establishing a BP neural network model to predict the radial rigidity of the tire; according to the method, the relationship between the structural parameters of the negative Poisson's ratio non-pneumatic tire and the radial stiffness of the tire is searched by utilizing the BP neural network, the radial stiffness value can be quickly and accurately predicted, the step of finite element simulation analysis and calculation is omitted, and the efficiency is greatly improved.

To provide a tire, which is configured so that a communication device can be suppressed from being damaged due to heat evolved inside the tire during rolling.SOLUTION: The tire comprises a side reinforcement rubber 2 with a crescent-shaped cross section, arranged in a side wall part 1b of the tire, and a communication device 10 buried inside the tire. The side reinforcement rubber has a side reinforcement rubber joined part ate which end parts in a tire circumferential direction of the side reinforcement rubber are joined to each other. The whole of the communication device is positioned in a predetermined region Kr in the tire circumferential direction extending from a center in the tire circumferential direction of the side reinforcement rubber joined part to a tire-angle range of 90° with a predetermined position Kb in the tire circumferential direction away by 180° from the center as a center.SELECTED DRAWING: Figure 1

The invention discloses special mute cotton for tires, which comprises a mute layer and a back adhesive tape, and the back adhesive tape is prepared from the following substances in parts by mass: 80-100 parts of styrene-butadiene-styrene block copolymer, 50-60 parts of tackifier, 20-30 parts of naphthenic oil, 5-15 parts of adsorbent, 1-2 parts of antioxidant 1520 and 1-2 parts of cross-linking agent. The prepared mute cotton does not need laser treatment and polishing, can effectively absorb a release agent on the inner wall of a tire, the bonding effect can reach cohesive failure of a self-adhesive layer, revolutionary change is achieved, tire agents, tire stores and even vehicle owners can operate the mute cotton by themselves, equipment assistance is not needed, construction is simple, cost is low, and large-scale popularization can be achieved.

The present invention provides a tire processing device, a tire repair device, a repair sheet, a tire repair method, and a tire manufacturing method. The tire repair device (10) of the present invention comprises: a tire support portion (15) that rotatably supports a pneumatic tire (5); and an attachment mechanism (18) that causes a softening additive to adhere to a tread portion (5A) of the pneumatic tire (5) supported by the tire support portion (15) so that the additive permeates the tread portion (5A).

A retreadability determination method includes a step (S1) of acquiring a state characteristic value, indicating a state of the tire, to be used in a first determination and a second determination, a step (S2) of executing the first determination, and a step (S9) of executing the second determination in a case in which it is determined in the first determination that the tire can be retreaded. The first determination is one of a chemical degradation state determination using a residual durability of the base tire calculated based on a chemical change in rubber material of the tire and a physical degradation state determination using a residual durability of the base tire calculated based on a state of physical damage to the tire, and the second determination is the other of the chemical degradation state determination and the physical degradation state determination.

To provide a tire fatigue life prediction method high in prediction accuracy.SOLUTION: This tire fatigue life prediction method comprises: a generation step of generating a fatigue life estimation line representing a relationship between breaking energy of a vulcanized rubber material and a repetition number using a strain energy density function of the vulcanized rubber material constituting a tire, a cracking progress speed, tear energy, and a strain energy density; an acquisition step of acquiring the strain amplitude of one round of a tire model during grounding for the tire model constituted by an element which can be numerically analyzed by a computer representing the tire; and an estimation step of estimating a fatigue life by applying a value of the strain amplitude acquired in the acquisition step to the fatigue life estimation line.SELECTED DRAWING: Figure 6

To provide a feature capable of improving the estimation accuracy of a magic formula model used as a tire characteristic model.SOLUTION: This tire characteristic model identification method comprises: a pre-processing step; a first identification step; and a second identification step. In the pre-processing step, a first parameter group is identified in a basic formula of a magic formula model, and a second parameter group is derived using a detailed formula of the magic formula model on the basis of the first parameter group. In the first identification step, setting the second parameter group derived in the pre-processing step as an initial value and a representative parameter in the second parameter group variable, identification is carried out using the basic formula and the detailed formula. In the second identification step, setting the second parameter group updated in the first identification as an initial value and at least one of a load dependent parameter, a camber angle dependent parameter, and an inner pressure parameter variable, identification is carried out using the basic formula and the detailed formula.SELECTED DRAWING: Figure 3

To provide a tire, which is configured so that a communication device can be suppressed from being damaged due to deformation of the tire during rolling.SOLUTION: The tire comprises a side reinforcement rubber 2 with a crescent-shaped cross section, arranged in a side wall part 1b of the tire, and a communication device 10 buried inside the tire. The side reinforcement rubber has a side reinforcement rubber joined part 2j having end parts in a tire circumferential direction of the side reinforcement rubber joined to each other. In a projection plane on which the tire is projected in the tire width direction, at least a portion of the communication device is overlapping with the side reinforcement rubber joined part.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of tire design, and discloses a mining wide-body vehicle tire crown carcass contour design method and system, and the method comprises the steps: collecting data to construct a working condition pedigree, carrying out load analysis to obtain an inflation equilibrium state target contour, and forming a crown stress-strain ideal distribution domain; surveying and mapping a material rigidity change mapping table, constructing a deformation matrix, and reversely solving to obtain an initial contour map of the mold; dividing crown carcass curvature partitions, carrying out crown stress analysis, and carrying out matching evaluation to form a deviation correction parameter set; a contour design scheme is accurately corrected, inflation deformation is simulated, and a final crown carcass contour map is obtained through adaptability evaluation selection. According to the method, through combination of mechanical analysis and material characteristics, accurate contour control of the tire from design to production is achieved, and the durability and working condition adaptability of the tire of the mining wide-body vehicle are improved.

The utility model relates to the technical field of improving the mute effect of an automobile tire, and discloses a mute structure for improving the mute effect of the automobile tire, mute cotton formed by a polyurethane matrix is embedded in the inner wall of the tire, the matrix is provided with micropores, and reinforced fibers are respectively arranged in the transverse direction and the longitudinal direction of the matrix. And the polyurethane matrix is bonded with the inner wall of the tire through a glue layer. The silence cotton can effectively absorb and disperse vibration and noise generated in the running process of the tire through the combination of the micropore structure and the reinforced fibers. In addition, the use of the polyurethane matrix ensures that the mute cotton has good elasticity and durability, so that the mute effect of the mute cotton is kept in long-term use. According to the utility model, not only is the comfort of the automobile improved, but also the noise pollution to the environment is reduced. By adopting the organic silicon sealing glue as the bonding layer, the tight combination of the mute cotton and the inner wall of the tire is ensured, the abnormal sound possibly generated in the driving process is avoided, and the high practical value and the market application prospect are achieved.

The invention belongs to the field of wheel road tests and bench tests, and particularly relates to a wheel bench impact test method and system equivalent to test field road impact. The method comprises the following steps: determining a road impact condition of a vehicle for road test; the road impact working condition is reproduced; in the reproduced road impact working condition, simulation prediction of rack impact test energy is carried out; and generating a bench impact test scheme based on a simulation prediction result. Compared with a traditional road test, the method has the same test effect, the test period can be greatly shortened, test resources and cost are saved, potential risks of the wheel road test are found in advance, and a necessary rapid test verification means is provided for wheel design and verification. The assessment of the road test on the wheel is equivalent to the bench test, the reliability of the road test on the wheel is verified before the whole vehicle road test, the risk of failure of the wheel in the whole vehicle road test stage is reduced, and the method is wide in application range, simple, reliable and low in cost.

A method for electronically diagnosing an electric drive chain for an electric or hybrid motor vehicle. The drive chain including an electric battery, an electric machine, an inverter connected between the battery and the electric machine, and a link capacitor connected in parallel between the battery and the inverter. The diagnosis method includes: i) continuously controlling the increase in the control frequency of the electric machine; ii) determining the variation in the Fourier transform of the current variation between the assembly comprising the battery and the link capacitor and between the inverter; iii) for each control frequency: 1) detecting an anomaly; 2) otherwise, determining when the control frequency value is optimal.

This analysis device comprises: a sound absorption rate calculation unit that calculates a sound absorption rate on the basis of design information of a sound absorption structure; a modeling unit that generates a finite element model on the basis of design information of a tire; a sound absorption rate setting unit that sets a sound absorption boundary having a sound absorption rate to a finite element model on the basis of arrangement information of the sound absorption structure with respect to the tire; and a sound pressure analysis unit that analyzes a sound pressure distribution of an internal space of the tire on the basis of the finite element model in which the sound absorption boundary is set.

The invention discloses an intelligent simulation analysis method and system for standing wave characteristics and safety performance of an automobile tire, and relates to the technical field of intelligent simulation analysis and automobile safety. The intelligent simulation analysis method and system for the standing wave characteristic and the safety performance of the automobile tire comprises the following steps that S1, multi-dimensional simulation driving data are obtained and preprocessed; s2, reconstructing a tire structure response based on the preprocessed multi-dimensional simulation driving data, and measuring the intense degree of the structure response; s3, simulating tire temperature change in combination with a temperature rise simulation process, and judging whether temperature rise abnormity exists in the local area or not; and S4, carrying out space overlapping comparison on the structure response abnormity and temperature rise abnormity areas, and identifying a space overlapping state. The problems that a tire local high-temperature area and a standing wave high-response area are overlapped to cause structural instability easily, recognition is difficult to achieve in advance in the prior art, the monitoring mode is based on the overall trend, and a recognition and early warning mechanism for the local overlapping situation is lacked, so that the tire burst risk is difficult to perceive in time are solved.

To provide a tire simulation method and a tire simulation device which can shorten a computation time of a crack progress.SOLUTION: The tire simulation method includes tire model acquisition step ST01 which acquires a tire model for analyzing a rolling state of a tire, tire model deformation calculation step ST02 which calculates deformation of the tire model equivalent to one lap of tire rolling when the tire is grounded, tire part model acquisition step ST03 which acquires a tire part model for analyzing a part of the tire model, tire part model deformation calculation step ST04 which calculates deformation of the tire part model on the basis of the deformation of the tire model, crack progress model generation step ST07 which generates a crack progress model which defines a base point of the crack on the tire part model and crack progress analysis step ST08 which analyzes crack progress by calculating the deformation of the crack progress model on the basis of the deformation of the tire part model.SELECTED DRAWING: Figure 2

To provide a simulation method enabling performance of an airless tire to be evaluated.SOLUTION: Provided is a simulation method for an airless tire having a tread ring, a hub, and a plurality of spokes. The simulation method includes: a model input step S1 of inputting to a computer an airless tire model including a tread ring model obtained by discretizing each of the tread ring, the hub, and the plurality of spokes with a finite number of elements, a hub model, and a plurality of spoke models; and a simulation step S2 in which the computer provides an external force to the airless tire model, and calculates a physical quantity acting on the airless tire model. The simulation step S2 includes a step of, for each of the plurality of spoke models, calculating a force acting on such a predetermined reference plane that cuts a length of the spoke model in a tire radial direction.SELECTED DRAWING: Figure 3

The purpose of the present invention is to provide a stabilizer which can be separated from a tire and reused, while achieving both performance derived from tire rigidity and riding comfort performance. The stabilizer is housed in a tire cavity, and includes: a pair of bead-corresponding members (12, 12) located at respective ends in the width direction and extending in the circumferential direction; a plurality of side surface corresponding members (14) extending radially outward from radially outer end portions of the pair of bead corresponding members, the radially outer end portions of the side surface corresponding members being curved inward in the width direction; a tread corresponding member (16) connected to the radially outer ends of the plurality of side surface corresponding members located on each side of the equatorial plane; and a plurality of circumferential reinforcement bodies (18) located radially outward of the tread counterpart members, at least the circumferential reinforcement bodies comprising rigidity variable members.

The invention relates to a heating system (1) for putting at least one tyre (P1, P2, P3, P4) at a predetermined target temperature, the system comprising: at least one heating enclosure (10, 12) for receiving said at least one tyre (P1, P2, P3, P4); a temperature-control system (20) comprising at least one heating device (21) and at least one temperature sensor (23), the temperature-control system (20) being configured to actuate the heating device (21) when the internal temperature measured by the temperature sensor (23) is strictly lower than the target temperature; the heating device (21) being an electrical energy heating device (21) comprising at least one electrical resistor. The invention also relates to a method for heating tyres (P1, P2, P3, P4) for putting at least one tyre (P1, P2, P3, P4) at a predetermined target temperature.

The invention relates to the technical field of engineering tires, in particular to a rubber engineering tire performance evaluation method and system. The method comprises the following steps: acquiring tire sample basic attribute information, mine operation dynamic loading information and mine topographic feature information, and simulating the influence of acting forces in different directions on tires at different positions under the working condition of mine operation based on the mine operation dynamic loading information and the mine topographic feature information in combination with the tire sample basic attribute information. Dynamic orientation acting force characteristic information is obtained; on the basis of the basic attribute information of the tire sample and in combination with the dynamic azimuth acting force characteristic information, simulating the negative influence of the tire in the process of transmitting the dynamic acting force to the steel wire ring to obtain the negative performance information of the tire; and based on the tire negative performance information, evaluating the performance performance information of the tire in the long and short periods, and determining and outputting a tire performance evaluation report. The tire damage analysis is more targeted, and the evaluation depth and accuracy are greatly improved.

The utility model relates to the technical field of semitrailer tire burst safety protection, and discloses a semitrailer tire burst emergency locking safety protection device which comprises a hub body and a spoke, a first supporting ring is arranged on the upper portion of the center of the outer side of the hub body, and a second supporting ring is arranged on the lower portion of the center of the outer side of the hub body. A connecting adjusting device is arranged at the other end of the first supporting ring and comprises two square grooves, arc-shaped screw rods are arranged between one end of the first supporting ring and one end of the second supporting ring and close to the front portion and the rear portion, and the two ends of the two arc-shaped screw rods penetrate through the two square grooves correspondingly to the inner walls of the two square grooves; and the outer sides of the two end parts of the two arc-shaped screw rods are in threaded connection with locking nuts in a sleeving manner. According to the hub main body adjusting device, a worker can adjust the locking nut to adjust and adapt to the hub main body according to different sizes of the hub main body through the connecting adjusting device, so that the universality and the adaptability of the device are improved.

The present invention relates to the field of tire manufacturing technology, and more particularly to a tire forming method, apparatus, and computer program product for optimizing the rounded reciprocating (RRO) out-of-roundness (RRO) of a green tire. The method comprises the following steps: 1) setting multiple apex positioning angles between 0 and 360 degrees in the forming machine product parameter column; 2) conducting a building drum and steel apex combination test at each angle, measuring the RRO out-of-roundness of 15 to 30 green tires, and taking the average value; 3) comparing the data to determine the minimum RRO out-of-roundness when the positioning angle is angle A; and 4) rotating the building drum by angle A, then combining the building drum with the steel apex. The present invention uses online RRO out-of-roundness data to adjust the angle between the building drum and the steel apex, effectively preventing the overlap of the high points of the building drum and the steel apex, thereby improving the overall quality of the tire.

The present invention relates to a low-noise tire, a tire inner polyurethane foam sound-absorbing lining composition for manufacturing same, and a tire inner polyurethane foam sound-absorbing lining method using same and an apparatus therefor, and, more specifically, to a low-noise tire, a tire inner polyurethane foam sound-absorbing lining composition for manufacturing same, and a tire inner polyurethane foam sound-absorbing lining method using same and an apparatus therefor, wherein, in order to reduce cavity resonance noise, which is generated as interior noise by the exciting force generated between tire tread and a road surface during driving and transmitted to cavity spaces of tires and axles, a polyurethane foam sound-absorbing lining is formed by simply and quickly foaming spraying, in a liquid state, a polyurethane foam sound-absorbing lining composition at the inner surface of a tire, which corresponds to the tread of the tire, and curing same, and the adhesive strength of the interface between the inner surface of the tire and the polyurethane foam sound-absorbing lining is greatly increased without applying an adhesive primer to the inner surface of the tire so that the inner surface of the tire and the polyurethane foam sound-absorbing lining are not separated from each other, thereby improving the durability of low-noise performance.

To provide a tire vibration characteristic evaluation method which allows for accurately evaluating vibration characteristics of a tire when the tire goes over a protrusion on a plane.SOLUTION: A method of evaluating vibration characteristics of a tire 1 is provided. An axial force F1 exhibited when the tire 1 goes over a protrusion 3 provided on a plane 2 is derived from an axial force F2 exhibited when the tire 1 goes over a protrusion 5 provided on a running surface 4a of a running drum 4.SELECTED DRAWING: Figure 3