802 results about "Structural reliability" patented technology

A surface magnet type rotor and an inner magnet type rotor having good motor characteristics in which bonding strength is high between a magnet section and a soft magnetic yoke section, and structural reliability is high even in high speed use, and its producing method. The rotor comprises an anisotropic bond magnet section and a soft magnetic section wherein the anisotropic bond magnet section is preformed in magnetic field and then formed to be integrated with the soft magnetic section in nonmagnetic field. Subsequently, it is heat hardened to produce a surface magnet type rotor. Magnet units, each having a magnetic pole composed by bonding a pair of permanent magnets such that the directions of magnetization become symmetric with respect to the bonding surface, are linked such that magnetic poles of different polarities appear alternately on the magnetic action surface thus forming an anisotropic magnet body. Good motor characteristics can be attained by setting an angle to 5-40° between the direction of magnetization of the permanent magnet and a diametral direction passing the bonding surface.

The invention relates to an intelligent carrier for a mechanical parking system, comprising two vehicle bodies connected through a set of connecting rods, wherein, at least one vehicle body is provided with a traveling mechanism and a positioning device; the two vehicle bodies respectively comprise two rushing board mechanisms; each rushing board mechanism comprises a rushing board body, clamping bars on two ends of the rushing board body, a combined guide rail which is arranged on the two ends of the rushing board body and fixed on the vehicle body, and a power unit which controls the movement of the rushing board body; the combined guide rail comprises a first guide unit and a second guide unit; the rushing board body is moved under the action of the power unit and further drives the clamping bars to make linear motion along the first guide unit or rotary motion along the second guide unit. All motions are completed through the driving of a motor, which solves the problem of structural reliability of the prior carrier; the rushing board mechanisms for clamping tyres are driven by the motor, adopt a leadscrew-nut transmission mechanism, a synchronous belt driving mechanism, a chain transmission mechanism or a wire cable transmission mechanism for transmission, and are guided by the guide rail, thereby having high reliability.

This invention relates to a dense ceramics having ESD dissipative characteristics, tunable volume and surface resistivities in semi-insulative range (10.sup.3 -10.sup.11 Ohm-cm), substantially pore free, high flexural strength, light colors, for desired ESD dissipation characteristics, structural reliability, high vision recognition, low wear and particulate contamination to be used as ESD dissipating tools, fixtures, load bearing elements, work surfaces, containers in manufacturing and assembling electrostatically sensitive microelectronic, electromagnetic, electro-optic components, devices and systems.

The invention discloses a structural reliability analysis method based on a self-adaptive agent model. The method includes the following steps that firstly, according to distribution form of random variables, a small amount of initial input sample points are generated, and the response value of the system is calculated, and the obtained initial input and output sample points serve as initial training sample points for building a Kriging agent model; secondly, a newly added training sample point selection criterion is created, according to the distribution of random variables, a large amount ofrandom candidate training samples are generated and substitute into a learning function for calculation, candidate sample points with the smallest learning function value serve as newly added training sample points, and loop iteration is conducted until convergence occurs; finally, according to obtained final input and output training sample points, a final agent model is constructed, a Monte Carlo simulation method is adopted, the system failure probability and the reliability sensitivity are calculated, and the problems that an existing method only considers the limitations of the characteristics of sample points in an input space, and the accuracy is low and the calculation amount is large in the reliability analysis are solved.

A surface mounted LED packaging structure based on a silicon substrate includes the silicon substrate, an LED chip, an annular convex wall and a lens. The silicon substrate has an upper surface of planar structure and without grooves. An oxide layer covers the upper surface of the silicon substrate. Metal electrode layers are arranged in the upper surface of the oxide layer, and the upper surfaces of the metal electrode layers are arranged with metal bumps. Vias through the silicon substrate are provided under the metal electrode layers. An insulating layer covers the inner wall of the vias and a part of the lower surface of the silicon substrate. A metal connection layer covers the insulating layer surface within the vias. Two conductive metal pads are respectively arranged under the lower surface of the silicon substrate and insulated from the silicon substrate. A heat conduction metal pad is arranged on the lower surface of the silicon substrate. The LED chip is flip-chip mounted on the silicon substrate. The annular convex wall and the lens cause the LED chip and the metal electrode layers therein to be isolated from environment. The structure of the present invention has its advantages of good heat dissipation effect and small volume, while packaging without gold wires makes the structure highly reliable and achieves large-scale production of wafer level, resulting in the reduction of the packaging cost.

The present invention relates to a radio with a key and knob combination. To solve problems such as inconvenience caused by the independent PTT key and volume control knob on the traditional radios, the present invention provides a radio with a key and knob combination, comprising a PPT key unit and a volume control unit, wherein the key is installed inside a central cavity of the knob, which is a hollow knob, to form the key and knob combination. Rotation of the knob (106) may drive the shaft (102) and the toggle piece (111) to rotate synchronously, and then toggle the volume switch (112), while the pressed key (101) may cause the shaft (102) moving axially to toggle the PTT switch (103). When operating the radio with a single hand, users can both press the PTT key to initiate a call and rotate the knob to adjust the volume level by a thumb or a forefinger, and the operation is very convenient. Additionally, only an axle hole is required on the radio housing, thus the key and knob combination enhances the structural reliability of the radio.

The invention discloses a structural reliability analysis method based on an agent model under the condition of hybrid uncertainty. The structural reliability analysis method comprises the steps that random uncertainty is modeled by adopting random variables, and epistemic uncertainty is modeled by adopting interval variables; uniform samples generated by the random variables in an approximate value section and all the interval variables within upper bounds and lower bounds of respective intervals and a system response value are used as training sample points for establishing a Kriging agent model, and according to the obtained Kriging agent model, the maximum values and the minimum values of the reliability sensitivity, the failure probability and the system failure probability under any interval variable value are calculated by adopting a Monte Carlo simulation method. By the adoption of the structural reliability analysis method, the problems that a traditional agent model under the condition of the hybrid uncertainty has a certain precision locally, and the traditional reliability analysis calculated quantity is larger are solved, and the structural reliability analysis method better accords with engineering practice.

The invention belongs to the field of an aircraft fatigue theory and relates to a method for analyzing service life of a high maneuverability aircraft base on detail fatigue rating. The analyzing method comprises the following steps: step1, preparing load spectrum analyzed based on the DFR (detail fatigue rating) of the high maneuverability aircraft; step2, analyzing the reference value of the DFR; step3, calculating the DFR0 value; step4, calculating the fatigue rating coefficient RC of the component; step5, confirming the allowable value [DFR] of the structure DFR; step6, calculating the allowable stress [sigma max]; step7, calculating and assessing the fatigue strength margin; step8, calculating the reliable lifetime of the structure; step9, creating a stress level control curve and providing the allowable stress value of the objective service life. The analyzing method has the advantages that the process of performing fatigue design and service life assessment by the DFR method is relatively simple, the calculation workload is relatively low, the operating efficiency of the whole department can be dramatically improved, and thus the analyzing method has the important significance to shorten the research period of a new machine and to save the research cost, and the economic benefit is obvious.

A surface magnet-type and inner magnet-type rotors having high bonding strength between a magnet section and a soft magnetic yoke section, and exhibiting high structural reliability and good motor characteristics even in a high-speed application. Methods of manufacturing the rotors are also provided. The surface magnet-type rotor is composed of an anisotropic bond magnet section and a soft magnetic section. To manufacture the surface magnet-type rotor, the anisotropic bond magnet section is preliminarily molded in a magnetic field, and then molded finally in a nonmagnetic field to be integrated with the soft magnetic section and heat cured. Magnetic units each having magnetic poles formed by bonding a pair of permanent magnets such that the directions of magnetization are symmetric about the bonding surface are connected to form an anisotropic magnet body, in which the magnetic units are arranged such that magnetic poles of different polarities appear alternately on a magnetism action surface. Good motor characteristics are attained by setting the direction of magnetization of the permanent magnets at an angle of 5-35 DEG relative to the radial direction passing the bonding surface.

The invention provides a quantum dot LED package structure which includes a nonmetal bracket, an LED chip, a first barrier layer, a quantum dot silica gel layer, a second barrier layer, and an undopedsilica gel layer. The quantum dot silica gel layer can improve the color gamut and color saturation of a liquid crystal display. The first barrier layer can radiate the LED chip and stop outside water oxygen from invading the LED chip. The second barrier layer can stop outside water oxygen from invading the quantum dot silica gel layer and the LED chip and achieve a further radiating effect. Thus, the quantum dot LED package structure of the invention provides an environment isolated from water oxygen and having a good radiating effect for quantum dots, and can improve the luminescence efficiency and service life of quantum dots. Compared with the existing quantum dot LED package structure, the quantum dot LED package structure of the invention has high reliability and low production cost, and can help to easily realize a narrow-bezel liquid crystal display.

The invention discloses a structural performance optimum design method under non-probability conditions. The method comprises following steps: an interval optimum design model considering structural reliability requirements is established; sample points are obtained by means of Latin hypercube sampling and collaborative simulation; a Kriging surrogate model for predicting objective functions and constraint functions is established; the interval optimum design model is solved by means of a double-layer nested genetic algorithm, wherein in the inner layer of the genetic algorithm, the left and right boundary of the interval values of the objective functions and the constraint functions are calculated, in the outer layer of the genetic algorithm, the interval reliability and reliability violation degree of each constraint function according to an unified formula are calculated to obtain the total reliability violation degree of a design vector, and the feasibility is determined; superiority ordering is performed on all design vectors according to a superior relation criterion based on the total reliability violation degree; the optimal solution of the interval optimum design model is output when maximum evolution algebra or convergence threshold is reached. By means of the method, structural performance optimum design method under non-probability conditions can be realized.

The invention relates to a turbine blade disc structure service life reliability design method. An initial scheme for a turbine blade disc structure is determined according to a traditional strength and service life analysis method, a geometrical shape of the structure is determined and weight of the structure is calculated; determinacy load of the structure is acquired and detailed 3D stress / strain analysis is conducted; a determinacy design criteria is designated to be an optimized constraint condition, and the design is returned to design support when the result does not meet the criteria demand; influence of the turbine blade disc structure is analyzed and the turbine blade disc is partitioned; structure reliability under each failure mode is calculated and a service life reliability analysis result is evaluated with the combination of the service life probability criteria; the design support is required when the structure reliability result does not meet the criteria demand; combined risk evaluation is conducted to a risk level of each failure mode and overall failure probability of the turbine blade disc structure is calculated; each technical index is determined whether to meet demands; and design support is required when the demands are not met or modifications are conducted to the size or the material.

The invention relates to a risk evaluation method for a self-elevating type ocean platform. The risk evaluation method includes steps of structural reliability analysis under extreme load, reliability analysis of structural fatigue, structural reliability analysis of platform piles, risk analysis of ship collision and risk analysis of fire disaster explosion. The risk evaluation method for the self-elevating type ocean platform effectively fills the blank in risk evaluation methods for the self-elevating ocean platform in the prior art, provides technical support for determining and policy making in design and construction stage of ocean engineering, and guarantees safety and reliability of the self-elevating platform to the greatest extent.

The invention provides an engineering structure optimization design method used in an uncertain environment, and relates to the technical field of engineering structure reliability optimization. According to the method, an uncertain engineering structure optimization design problem is defined first, an engineering structure and uncertain information in the use environment are described as random variables, interval variables or combinations of the random variables and the interval variables according to existing samples, corresponding optimization models are established according to different types of uncertain variables, reliability indexes in the optimization models are calculated on the basis of the point collocation random / interval propagation analysis method, and finally different optimization solvers are selected according to actual problems for outer layer optimization. Reliability indexes of an inner layer failure function are obtained through efficient uncertain propagation analysis, and formation of the nested optimization problem is avoided; hybrid uncertainty models including random parameters and interval parameters in the same problem are considered, and the method has a practical engineering significance in interval parameter optimization problem under random process stimulation.

The invention discloses a method for increasing a front screen-to-body ratio, a screen installing structure and a mobile terminal for a technical problem that the screen-to-body ratio is influenced since the black border regions at two sides of a screen are wide in a frame structure of the existing mobile terminal. The screen installing structure comprises an inner shell, or a middle frame and anelastic filling layer, wherein a display screen of the screen and a backlight board are orderly arranged in the inner shell or a holding tank corresponding to the middle frame; the elastic filling layer is arranged in a gap among the display screen, the backlight board, and the inner shell or middle frame edge; a glass cover plate of the screen fits in the upper surface of the elastic filing layer. By using the method disclosed by the invention, the screen installing structure way is optimized, the screen black border width can be reduced by 0.3mm so as to improve the screen-to-body ratio andachieve an aim of supper-narrow border; and meanwhile, the flexible glue is dispensed as the side of the shell to play the effects of shocking absorption and resisting impact, thereby improving the reliability of the whole structure.

The invention belongs to the field of structural reliability analysis, and specifically discloses a structural reliability analysis-oriented common dynamic tracking sequence sampling method. The method comprises the following steps of: establishing a structural ultimate state function, and determining a random variable and random variable distribution information; constructing a random point, andconverting the random variable and the random point into a standard normal state to determine a target sampling area; constructing a training point, forming a training data set and establishing a proxy model; dividing the target sampling area and recognizing a most sensitive area; exploiting the most sensitive area to obtain a new training point, updating the training data set and the proxy model,and calculating a prediction failure probability; and calculating maximum relative errors of all the local areas and a variation coefficient of the prediction failure probability, and judging whetherto terminate the sampling or not according to the maximum relative errors and the variation coefficient so as to complete the structural reliability analysis. The method has the advantages of being simple in operation step, high in efficiency and strong in self-adaptability.

The invention discloses a gear drive reliability assessment method based on a Kriging model and is applied to the field of reliability assessment. According to the gear drive reliability assessment method, the Kriging model is established firstly according to an initial sample, then whether variable coefficients meet the requirements or not is judged according to the established Kriging model, new variable coefficients are recalculated in a sample point adding mode. The stress calculation quantity based on a finite element method in a traditional method is greatly decreased. The gear drive reliability assessment method adopts a Monte Carlo method to calculate the structural reliability, and meanwhile combines with a learning function to obtain a high-precision agent model with fewer sample points, and accordingly testing times are decreased.

Disclosed is a battery pack including (a) a battery module array having battery modules arranged in two or more rows, (b) a pair of side support members that are in close contact with outermost unit modules in the battery modules in the battery module array, (c) lower end support members coupled to lower ends of the side support members, (d) two or more first upper mounting members coupled to upper ends of the side support members and lower ends of the battery modules erected in an upside-down fashion, (e) a second upper mounting member coupled to upper ends of the first upper mounting members, and (f) a rear mounting member disposed at the rear of the battery module array.

A display apparatus includes a display panel, a light source module, a printed circuit board and a receiving container. The display panel displays an image. The light source module provides light to the display panel. The printed circuit board is electrically connected to the light source module. The printed circuit board is electrically connected to the display panel through a flexible film. The receiving container includes a main receiving portion and a substrate fixing portion. The main receiving portion receives the light source module and the display panel. The substrate fixing portion is connected to the main receiving portion, extends along a side portion of the main receiving portion in a first direction and supports the printed circuit board. Accordingly, the display apparatus stably receives the printed circuit board, and has a slim shape so that structural and electrical reliability may be improved.

The invention provides an interconnection structure for improving the reliability of a soldering spot of soft soldering of a CCGA (Ceramic Column Grid Array) device and an implementation method, belonging to the technical field of microelectronic packaging. The invention aims to solve the problems that the reliability of the conventional area array package device is generally lower than that of a peripheral leaded package device and a high-frequency and high-power large-area area array package device has low reliability and short service life. A Cu column in the interconnection structure consists of a cylinder and two end heads which are integrally formed; each end head is in the shape of a revolved body in which a straight line or cambered line is used as a bus; the cylinder is positioned between the two end heads which are arranged back to back, and the cylinder and the two end heads are coaxial; the cylinder is in smooth transition with the end heads; and the height of a soldering round corner is less than that of the end heads. The method comprises the following steps of: soldering one end of the Cu column on a metal film bonding pad at one side of a chip carrier substrate by using high-melting-point solder paste; and then soldering the other end of the Cu column on the metal film bonding pad at one side of a printed circuit board by using low-melting-point solder paste. The interconnection structure has high reliability and long service life and can be used for packaging a large chip.

The invention discloses a finite-element analysis method for thermal mechanical strength of an exhaust manifold, and aims to shorten the development period, reduce the development cost and perform virtual simulation on the mechanical performance and the structural reliability of an engine exhaust manifold in a digital model stage of the engine. By the method, the temperature field and a stress field of the engine exhaust manifold are calculated and solved by a finite-element method, so that temperature distribution, stress distribution, strain distribution, stud moment change and sealing pressure on the flange surface of the exhaust manifold of the engine exhaust manifold are obtained; and the structure of the engine exhaust manifold can be well designed.

The invention relates to a method for realizing reliability maintenance planning of a high temperature pipeline system, which comprises the following steps of: collecting and acquiring detection data of a high temperature pipeline system; calculating a finite element of the high temperature pipeline system; determining creep damage parameters according to the influence degree of all factors on the life of the high temperature pipeline; creating a creep damage probability model through determining the probability distribution of the creep damage parameters; calculating a structural failure probability according to the creep damage probability model; creating a maintenance planning model based on reliability analysis according to the detection data, test results of materials and structures of the high temperature pipeline system and the structural failure probability; and carrying out calculation processing according to the maintenance planning model to obtain the optimal maintenance time of the high temperature pipeline system. By adopting the method for realizing the reliability maintenance planning of the high temperature pipeline system, the structural reliability is determined efficiently and accurately, a maintenance scheme can be accurately determined, the similar problem of the maintenance planning of the high temperature pipelines in other fields can be solved, and the method has wider application range.

The invention discloses a pressure filter comprising a plurality of filtering plate sets which are connected in sequence, wherein each filtering plate set comprises a main plate, an auxiliary plate, and an auxiliary frame, the auxiliary plate is fixed on one side of the main plate and on the same side of the main plate, the auxiliary frame is sleeved on the periphery of the auxiliary plate in a sliding mode, and the other side of the main plate is connected with the auxiliary frame of the adjacent filtering plate sets. Moreover, volume-changeable pressing filtering space used for containing materials is arranged between the adjacent filtering plate sets. Each filtering plate set is provided with a material channel which is communicated with the pressing filtering space. The other side of the main plate, opposite to the contact face of the auxiliary plate, is provided with a filtering mesh. Filter cloth wraps outside the filtering mesh. Each filtering plate set is also provided with a gas channel and a liquid channel which are communicated with the outside to the pressing filtering space. The pressure filter is high in structure reliability, has no leakage of the materials, and is convenient to maintain. The invention further provides a pressing filtering method. As pressing filtering and drying above the third level are adopted, water-filtering effect is better, size of the pressed and filtered material is larger, water containing rate of the materials is lower, work efficiency is higher, and production is higher.

The present invention relates to a Membrane Electrode Assembly (MEA) which significantly enhances power density as well as structural reliability and method for producing the same. More specifically, it relates to the Membrane Electrode Assembly which has a plurality of protuberances and method for producing the same. The present invention involves making supporting bodies to have a plurality of protuberances on one side of the supporting bodies, forming a catalyst layer on one side of the supporting bodies having the protuberances, interposing a polymer-electrolyte-membrane between the supporting bodies, aligning the supporting bodies for the protuberances to engage each other; and hot-pressing the aligned supporting bodies. The present invention can increase the area of a three-phase boundary in which oxidation-reduction reaction of hydrogen and oxygen occurs and decrease resistance to ion conduction; consequently fuel cells have the characteristic of a large output of power density.

The invention discloses a heat dissipation processing device and a mobile terminal. The device comprises a mobile terminal metal stand subjected to low-thermal-conductivity surface removal treatment, a first heat conducting material with rough surface, and a PCB (printed circuit board) with a multilayer structure, wherein the mobile terminal metal stand is located between a mobile terminal LCD (liquid crystal display) and the PCB; the space between the mobile terminal metal stand and the PCB is filled with the first heat conducting material; large-power devices on the PCB are arranged at a middle position of the device surface of the PCB, and are kept with gap between the devices; at least one layer of ground copper is arranged in the PCB; ground copper is arranged on the bottom or other positions of the large-power devices on the device surface of the PCB; and a ground hole is formed on the device surface of the PCB. Based on the technical scheme provided by the invention, the heat dissipation processing device provided by the invention can improve the overall electromagnetic compatibility index, radio frequency index and structural reliability index while the mobile terminal electronic system is subjected to the effective heat dissipation treatment.

The invention discloses a method for bonding carbon fiber / phenolic-nitrile rubber materials, and belongs to the field of the manufacturing of a solid rocket engine insulator, and aims at solving the bonding problems of an engine housing, a first EPDM insulation material, a carbon fiber / phenolic-nitrile rubber materials and a second EPDM insulation material and improving the structural reliability. The method mainly comprises the steps of preparation, coating, prefabrication, cleaning, glue coating, setting, thermal pre-pressing, flaw detection, curing and the like. The structural integrity of the engine housing, a first EPDM insulation material, the carbon fiber / phenolic-nitrile rubber materials and the second EPDM insulation material are ensured by using a secondary bonding method, a secondary curing mode, a prefabrication forming method, a stepped temperature rising / dropping mode and other methods; the method has no de-bonding, air-entraining air hole and other quality problems, completely can meet the design requirements, and ensures the safety and reliability of a system.

The invention discloses a flexible multi-state switch reliability modeling method with the consideration to a voltage load sharing mechanism, and the method is characterized in that the method comprises the following steps: 1, constructing a single-end MMC physical structure reliability model; 2, building a bridge arm state-dependent reliability model based on the voltage load sharing mechanism; 3, building an eight-state reliability model of a flexible multi-state switch.

The invention provides an electromechanical system Y-type sealing structure reliability assessment method based on a proxy model and relates to the field of electromechanical systems. According to themethod, a finite element method is adopted to calculate contact stress between a Y-type sealing structure and a hydraulic cylinder wall, the relation between the contact stress and medium pressure isfound, and the magnitudes of frictional force under different working conditions are calculated; and a Kriging proxy model based on an EFF learning mechanism is adopted to fit a limit state equationof a sealing ring structure in MATLAB software, the Kriging proxy model is called through a Monte Carlo method, and the probability of failure of the sealing structure is obtained. Through the method,it is not needed to establish a specific mathematical model, a precise structure response model can be provided, an optimal sample point can be effectively selected according to an EFF learning function sequence by the adoption of the Kriging proxy model based on the EFF learning mechanism, the limit state equation of the sealing structure can be simulated at high precision, reliability calculation time of the complicated structure is shortened, operation efficiency is improved, and the method is suitable for reliability analysis and assessment of practical engineering.