48results about How to "Achieving Lightweight Goals" patented technology

The invention provides a dynamic lightweight class trust evaluation method based on the Bayesian theory and the entropy theory, and belongs to the technical field of wireless sensor network security. The dynamic lightweight class trust evaluation method based on the Bayesian theory and the entropy theory includes the following steps: S1, an evaluation subject calculates the direct trust value of an evaluation object according to the Bayesian theory; S2, the evaluation subject updates the direct trust value of the evaluation object by means of attenuation factors and valid history memory periodically; S3, the evaluation subject calculates the confidence coefficient of the direct trust value of the evaluation object, and judges whether the confidence coefficient is larger than a certain threshold value to determine whether the indirect trust value of the evaluation object needs to be calculated or not; S4, the evaluation subject confirms the bang path of the recommendation trust values, confirms the weight of the recommendation trust values by means of the entropy theory, calculates the indirect trust value of the evaluation object, and calculates the comprehensive trust value of the evaluation object through the combination of the direct trust value and the indirect trust value of the evaluation object. The dynamic lightweight class trust evaluation method based on the Bayesian theory and the entropy theory is in accordance with the characteristics that sources such as capacity, calculation, and storage of network nodes are limited and has the advantages of being dynamic, adaptive, lightweight and the like.

The invention belongs to the technical field of car manufacturing. A novel instrument board beam assembly of blade electric vehicles comprises a beam body, a left instrument board beam connecting plate, a right instrument board beam connecting plate and a longitudinal arm beam; the beam body comprises a left tube beam and a right tube beam which are fixed in a matched and sleeved manner, the left tube beam comprises an upper left tube beam and a lower left tube beam, the upper left tube beam and the lower left tube beam are in U-shaped groove shapes, and openings of the upper left tube beam and the lower left tube beam are opposite; the right tube beam comprises an upper right tube beam and a lower right tube beam, and the upper right tube beam and the lower right tube beam are provided with an upper steering wheel support and a lower steering wheel support; and the upper steering wheel support and the upper right tube beam are of an integrated molding structure, and the lower steering wheel support and the lower right tube beam are of an integrated molding structure. According to the novel instrument board beam assembly, the left tube beam and the right tube beam are welded together in a sleeved manner, by means of the structural design, the material using amount of parts is reasonably distributed, and material waste is avoided; and meanwhile, aluminum alloy die-cast formation is adopted in the tube beams, and the overall weight is reduced while the performance requirement is met.

The invention discloses an integral body structure of a large highway bus with a safety partition. The body structure comprises a first safety partition in front of the body structure, wherein the upper portion of the inside upright post of the first safety partition is fixed on the front beam of the top cap of the body structure, the lower portion is fixed on the front lower beam of the chassis of the body structure. Multiple first inclined struts are arranged between the inner side upright post and the front side periphery of the body structure, and the first inclined struts and the inner side upright post form multiple triangular structures; a second safety partition is positioned at the rear part of the body structure, wherein the upper portion of the inner side upright post of the first safety partition is fixed on the rear beam of the top cap of the body structure, the lower portion is fixed on the rear lower beam of the chassis of the body structure. Multiple second inclined struts are arranged between the inner side upright post and the rear periphery of the body structure, and the second inclined struts and the inner side upright post form multiple triangular structures.

The invention provides a preparation method of a composite ceramic. The preparation method of the composite ceramic comprises the following steps that fiber cloth is bonded on the surface of a bulletproof back plate; a plurality of packaged ceramic small blocks are bonded on the surface of the fiber cloth; the fiber cloth is bonded on the surface of the plurality of packaged ceramic small blocks to form a ceramic plate; and the ceramic plate is cured to obtain the composite ceramic. The composite ceramic prepared by the method provided by the invention forms a new integral ceramic plate, and has the shock wave isolation effect, so that the anti-multiple attack ability is remarkably enhanced; the ceramic small blocks are bonded to one another, so that the overall bending strength is remarkably improved, the structural integrity and the bulletproof performance of the ceramic small blocks are not reduced under a long-term static load or dynamic load; and after impact, the damaged ceramicsmall blocks can be removed and replaced with the new ceramic small blocks in order to be used for multiple times and improve the use efficiency of the ceramic plate, and even in an emergency situation, the ceramic plate can be repaired. The invention further provides a composite ceramic.

The invention relates to an optimized design method for the initial size of a thin-wall structure for wings and a body of an aircraft. According to the method, the scheme of a thin-wall stiffened plate for the wings and a body of the aircraft in the early stage of the project is determined based on a thin-wall project beam theory. The design of the initial size of the thin-wall stiffened plate isa work with challenge and judgment property, and the subsequent design work is directly influenced when the initial size designed and defined by the scheme is reasonable or not. The ideal thin-wall structure needs to adequately meet the design requirements of static strength design, fatigue damage tolerance design, manufacturing, maintaining and the like. By simplifying any one of an analytical method or a to-be-analyzed structure in the design process of the initial size, the cost benefit of the project can be increased. By further introducing manufacturing and maintaining requirements in thepremise that the static strength requirement is satisfied under the condition that the strength requirement is satisfied, the relatively optimized initial size can be acquired. By defining the initial size of the structure according to the design requirements of manufacturing, maintaining and the like under the condition that the strength requirement is satisfied, the optimized design method canmeet the lightweight design requirement of the structure, and the design efficiency is improved.

The embodiment of the invention provides a shell for a sound production device and the sound production device, the shell comprises a plastic component and a reinforcing component, the plastic component comprises syndiotactic polystyrene, the range of the mass fraction of the syndiotactic polystyrene is 40-90, and the range of the mass fraction of the reinforcing component is 5-50. The shell comprises a plastic component and a reinforcing component, the plastic component comprises syndiotactic polystyrene, the range of the mass fraction of the syndiotactic polystyrene is 40 to 90 parts, and the range of the mass fraction of the reinforcing component is 5 to 50 parts. Through the cooperation of the low density of the syndiotactic polystyrene and the high strength of the reinforcing component, the shell has the characteristics of high strength, low density, small deformability and high assembly precision, and the aim of light weight of the shell is achieved.

The invention discloses a light-weight high-strength PBT material and a preparation method thereof. The PBT material comprises PBT plastic particles, an auxiliary agent and expandable microspheres. The expandable microsphere is of a shell-core structure, wherein a shell material is a thermoplastic polymer, and a core material is a foaming agent with the boiling point not higher than boiling pointof the shell material. The preparation method comprises the following steps: adding the auxiliary agent and the color master batch into the PBT plastic particles as required, then adding the expandable microspheres, and uniformly mixing; injecting the mixture into an injection molding machine through a feeding port, and melting the mixture through heating of a charging barrel; and injecting the molten mixture into a mold, and carrying out injection molding. In the injection molding process, the microsphere shell is heated to be softened and expanded in size to form stable foam holes with similar sizes. After the microspheres are expanded, gas is mainly contained in the spheres, the density of an injection molding part can be well reduced, and light weight is achieved; after the proper temperature and pressure are adjusted, the weight of the PBT material can be reduced by 10%-30%, and the bending strength and the tensile strength are both improved.

The invention relates to a railway vehicle and a vehicle body apron board of the railway vehicle. The vehicle body apron board of the railway vehicle comprises an apron board body, and the apron boardbody is an integrally formed carbon fiber composite material; and the apron board body comprises an outer skin, an inner skin, a shaft hole part and a vertical rib set, the shaft hole part and the vertical rib set are arranged between the outer skin and the inner skin, the vertical rib set can form a multi-cavity structure between the outer skin and the inner skin, and the shaft hole part is located at an end of one side of the multi-cavity structure. The vehicle body apron board can meet requirements for rigidity, strength and a service life, and meanwhile a light weight target can be achieved.

The invention discloses gray pig iron and a preparing method and application thereof. The gray pig iron comprises, by mass percentage, 3.6-4.0 parts of carbon, 2.2-2.4 parts of silicon, 0.2-0.4 part of manganese, 0.1-0.3 part of phosphorus, 0.08-0.12 part of sulphur, 2-4 parts of boron, 1-3 parts of vanadium, 0.2-0.6 part of chromium, 0.8-1.0 part of copper, 0.8-1.0 part of tin, 1-2 parts of nickel, 1-3 parts of titanium and 76-80 parts of iron. The invention further provides a preparing method of the gray pig iron. In addition, an accessory for a car is further provided. The accessory is made of the above gray pig iron. According to the gray pig iron, the chromium, the tin, the titanium and the iron are used in cooperation, and the firmness of the gray pig iron is greatly improved; and meanwhile, the stability of the gray pig iron is improved, and the safety of the gray pig iron accessory is improved. In addition, the preparing method of the gray pig iron is provided, the performance of the gray pig iron can be greatly improved through the method, and the safety of the gray pig iron is further improved.

The invention relates to an aluminum extrusion profile bracket structure, and belongs to the technical field of automobile parts. The structure comprises a supporting bottom plate and a supporting upper plate which are parallel to each other, a plurality of middle supporting reinforcing plates are arranged between the supporting bottom plate and the supporting upper plate, a plurality of bolt connecting holes are formed in the supporting bottom plate and the supporting upper plate, a left side connecting plate is arranged on the left side of the supporting bottom plate, and the left side connecting plate is perpendicular to the supporting bottom plate; a front connecting cross beam is arranged on the left side connecting plate, a U-shaped connecting plate is arranged on the right side of the upper supporting plate, and a rear connecting cross beam is arranged on the U-shaped connecting plate. The aluminum extrusion profile bracket structure has the beneficial effects that a traditionalstamping support is replaced with the aluminum extrusion profile support, reliable installation of the auxiliary frame and the transverse stabilizer bar is achieved, the die cost and the weight of anautomobile body are reduced, the cost is saved, the purpose of light weight of an automobile is achieved, and the aluminum extrusion profile bracket structure is novel in structure and low in cost.

The invention provides a simulation method for strengthening and lightening an airship gasbag of a stratospheric airship, the stratospheric airship and a manufacturing method for the stratospheric airship. The simulation method comprises the following steps of (1), determining a basic shape of the stratospheric airship needed to be researched, and performing modeling on the shape; (2) performing simulation calculation to obtain airship gasbag surface stress distribution of the airship under a maximum overpressure condition; (3) according to related characteristics and a safety coefficient of an airship gasbag material, defining that an airship gasbag surface stress of the airship under the maximum overpressure condition is greater than a maximum safety stress, and serving as a reinforcement rib strengthening region; (4) selecting and using a proper reinforcement rib material to meet a lightweight requirement; arranging a plurality of reinforcement fiber ribs in circumferential and longitudinal directions in a simulated manner in the reinforcement rib strengthening region to strengthen the airship gasbag; and (5) after the airship gasbag is strengthened, performing simulation calculation again to obtain the airship gasbag surface stress distribution, and according to the maximum stress, selecting a proper low-density material to be applied to the airship gasbag.

The invention discloses a single crank unit of a light crankshaft of an internal combustion engine. The single crank unit comprises a main shaft neck, a connecting rod neck and a crankshaft block; the upper and lower two ends of the joined place of the crankshaft block with the main shaft neck are respectively a crank arm and a balance block; through holes 1, 2, 3 and 4 for communicating in sequence are formed in the main shaft neck, the crankshaft block, the crank arm and the connecting rod neck; a main shaft neck oil way, a crank arm oil way and a connecting rod neck oil way formed in the main shaft neck, the crank arm and the connecting rod neck communicate through two internal oil pipes arranged in the four through holes; the internal oil pipe comprises an oil pipe body, a wedged joint and a spring; and a mounting groove is formed in the periphery of the wedged joint for embedding and matching with a sealing ring. The single crank unit is higher in lightweight degree and overall cooperativeness, better in lubrication effect, liable to operate and higher in stability.

The invention relates to a general type aluminum alloy automobile sub-frame structure. The general type aluminum alloy automobile sub-frame structure comprises an aluminum sub-frame crossbeam and end part aluminum castings, wherein the aluminum sub-frame crossbeam is in the shape of a bended arch; the end part aluminum castings are separately and symmetrically connected to two ends of the aluminum sub-frame crossbeam; upper swinging arm connecting seats are arranged on the upper end surface of each end part aluminum casting side by side; a lower swinging arm connecting seat and an oblique pull rod connecting seat are arranged at the lower end surface of each end part aluminum casting; each upper swinging arm connecting seat, each lower swinging arm connecting seat and each oblique pull rod connecting seat are separately formed by two punched vertical plates which are arranged side by side; a U-shaped clamping plate is in sleeving connection to each punched vertical plate to cover two side walls of the corresponding punched vertical plate; and an exhaust pipe lifting hook is also mounted on the aluminum sub-frame crossbeam. According to the general type aluminum alloy automobile sub-frame structure disclosed by the invention, the problem that under the premise that relevant surrounding pieces of a sub-frame are not changed, when a conventional iron sub-frame is switched into the aluminum sub-frame, the changes of the strength and the rigidity between iron materials and aluminum materials are great can be solved; the total weight of an automobile chassis system is reduced; and lightweighting is realized.

The invention discloses a polypropylene composite material, and relates to the technical field of composite materials. The polypropylene composite material is prepared from the following components inpercentage by mass: 50 to 75 percent of polypropylene, 5 to 20 percent of low-density polyethylene, 5 to 15 percent of a toughening agent, 4 to 12 percent of a filling agent, 3 to 8 percent of glassfiber powder, 0.3 to 1 percent of a stabilizing agent and 0.2 to 2 percent of a lubricating agent. According to the invention, the polypropylene is used as a base material, and the low-density polyethylene, the glass fiber powder and the filling agent are added, so that the prepared polypropylene composite material has the characteristics of low density and low shrinkage, and meets the requirementof light weight.

The invention discloses a die suitable for drawing forming of a tailor rolled blank box-shaped piece, and is applied to the technical field of blank drawing dies. The die comprises a drawing die part and a hydraulic control part; a drawing die main body comprises a stepped male die, a female die, blocked blank holders, a die gap adjusting device and the like; and the hydraulic control part mainly comprises a pump, a valve, a measurement and control instrument and the like. According to the die, drawing of the rolling tailor rolled blank box-shaped piece can be achieved, and the high-quality rolling tailor rolled blank box-shaped piece can be obtained by controlling blank holder force applied to the thin side and the thick side of a tailor rolled blank to be reasonably matched. The die is simple in structure, low in production cost, high in stamping efficiency and good in part quality, the male die and the female die are convenient to replace, and the blank pressing gap can be flexibly adjusted.

The invention relates to an ultra-high molecular weight polyethylene fiber surface continuous ultraviolet grafting treatment system that comprises an ultraviolet irradiation unit and a matching unit,wherein the ultraviolet irradiation unit consists of an ultraviolet control box and a quartz reactor positioned in the ultraviolet control box; the quartz reactor is provided with a fiber inlet and afiber outlet, a plurality of quartz rotating shafts for guiding fiber transmission are arranged in the quartz reactor, and an ultraviolet lamp for irradiating the quartz reactor and a transmission shaft for guiding fiber transmission are arranged in the ultraviolet control box; the matching unit is provided with a solution tank and a fiber winding and unwinding mechanism which are arranged outsidethe ultraviolet irradiation unit, and the fiber winding and unwinding mechanism is used for driving fibers to sequentially pass through the solution tank and the ultraviolet irradiation unit. Compared with the prior art, the invention has the advantages of simplicity, convenience, high efficiency, few side reactions, low cost and continuous and controllable process.