749results about How to "Improve the design level" patented technology

The invention relates to a method for designing gaps of end straight sections of diagonal few-leaf main springs and auxiliary springs, and belongs to the technical field of suspension steel plate springs. The method includes determining endpoint deformation coefficients of the various main springs and deformation coefficients G<x-CD> of contact points of the end straight sections of the N main springs and the auxiliary springs according to structure sizes and elastic modulus of the various diagonal variable-section main springs; acquiring endpoint force F<N> of the N main springs according to acting load of the auxiliary springs and the endpoint deformation coefficients of the various main springs; designing the main and auxiliary spring gaps between contact points of the end straight sections of the main springs and the auxiliary springs according to the thicknesses h<2> of roots of the N main springs, the endpoint force F<N> and the deformation coefficients G<x-CD>. The method has the advantages that as known from simulation verification, design values of the gaps of the end straight sections of the diagonal few-leaf variable-section main springs and the auxiliary springs can be accurately and reliably obtained by the aid of the method, and accordingly the product design level and performance and the vehicle ride comfort can be improved; the design and experiment costs can be reduced, and the product development speeds can be increased.

The invention discloses a heat exchanger performance test-bed, which comprises an air circulation system, an oil circulation system, a water/ethylene glycol circulation system and a compressed air system that are respectively connected with a test piece. The heat exchanger performance test-bed of the invention, on the one hand, simulates the working condition of the tested heat exchanger test piece so as to test whether the heat transfer capacity and the resistance are qualified for the design regulation requirements, on the other hand, by testing the standard test piece, the performance curve data of fins which have different types and specifications is obtained, and the fin performance database is established and enriched, thereby the design can reach a better, higher and more economical level.

The invention discloses a simulating design system for city expressway interchanges, comprising: data acquisition, model calibration, a data-out module, an evaluation and analysis module connecting with the model calibration module and data-out module respectively, and a data amendment module connecting between the evaluation and analysis module and the model calibration module. Meanwhile a model building and design method using the design system is disclosed too, which comprises: collecting the characteristic parameter of the traffic flow of typical expressway basic sections, interchange triage/confluence area, cutting area and various ramps; building the corresponding database and traffic capacity theoretical analysis model; demarcating and amending speed and density model with determinate service level; building traffic capacity analysis model suiting the traffic flow characteristic of the city expressway interchange. At last, the design of the lectotype of the city expressway interchanges conducted by the design model comprises analyzing and forecasting the traffic, raising a preliminary scheme, calculating the traffic capacity of the interchange, analyzing the suitability, selecting a rational strategy.

The invention relates to a method for designing few-leaf oblique line type variable-section main springs in the gaps between oblique line segments and an auxiliary spring, and belongs to the technical field of suspension steel plate springs. According to the structural sizes and the elasticity moduli of the oblique line type variable-section main springs, the endpoint deformation coefficient Gx-Di of each main spring and the deformation coefficient Gx-BC of the Nth main spring at the contact point of the corresponding oblique line segment and the auxiliary spring are determined first; then, according to the required auxiliary spring acting load design value and the endpoint deformation coefficient Gx-Di of each main spring, endpoint force FN of the Nth main spring is obtained; then, according to the thickness h of the root straight section of the Nth main spring, the Gx-BC and the FN, main spring and auxiliary spring gaps between the oblique line segment of the main springs and the contact point of the auxiliary spring are designed. Through simulation verification, it can be known that the main and auxiliary spring gap design value meeting the auxiliary spring acting load requirement can be obtained by means of the method, and the product design level, product performance and vehicle smoothness are improved. Meanwhile, design and testing cost is reduced, and product development speed is increased.

The invention relates to a three-dimensional virtual dressing method of clothes for a real person, relating to the technical fields of digital clothing design. The system is characterized in that an object of the three-dimensional virtual dressing of the clothes is three-dimensional real-person body model structured according to the three-dimensional measuring data of the real person. A three-dimensional body measuring system measures the data of the real-person body of a consumer, the figure curve characteristic and the face characteristic, and guides the data into a three-dimensional dressing system; the original standard body model of the three-dimensional dressing system is corrected according to the data of the real person in the three-dimensional dressing system, and the three-dimensional real-person body model is showed virtually so as to lead the virtual body model to embody the figure characteristic and the face characteristic of the real person; the consumer and a designer decide the style, the fabric and the color design data by two-way selection, guide the data into a tailor-making system, complete the design of clothes and generate individual clothes sample pieces automatically; ready-made clothes are sewn virtually, and when the clothes are worn on the three-dimensional real-person body model, the individual dressing effect is intuitively displayed; and the design level and design efficiency of clothes are greatly improved.

The invention relates to a design method for few parabolic type variable cross-section main spring end and auxiliary spring gaps, and belongs to the technical field of suspension steel plate springs. The method comprises the steps that according to the structural size and elastic modulus of each parabolic type variable cross-section main spring, an end point deformation coefficient of each main spring and a deformation coefficient Gx-CD of the Nth main spring on the contact point of an auxiliary spring and the end straight section; then, according to the auxiliary spring acting load design requirement value and the end point deformation coefficient of each main spring, the endpoint force FN of the Nth main spring is obtained; then, according to the thickness h2 of the straight section at the root of the Nth main spring, the FN and the Gx-CD, the main and auxiliary gaps between the contact points of the auxiliary springs and the end straight sections of the main springs are designed. According to simulation verification, the accurate and reliable main and auxiliary spring gap design values can be obtained by means of the method, the auxiliary spring acting load design requirement is met, and the product design level and performance and the vehicle ride comfort are improved; meanwhile, the product development speed is increased, and the design and testing expenses are lowered.

The invention discloses a simulating design system for city expressway interchanges, comprising: data acquisition, model calibration, a data-out module, an evaluation and analysis module connecting with the model calibration module and data-out module respectively, and a data amendment module connecting between the evaluation and analysis module and the model calibration module. Meanwhile a modelbuilding and design method using the design system is disclosed too, which comprises: collecting the characteristic parameter of the traffic flow of typical expressway basic sections, interchange triage/confluence area, cutting area and various ramps; building the corresponding database and traffic capacity theoretical analysis model; demarcating and amending a speed and density model with determinate service level; building a traffic capacity analysis model suiting the traffic flow characteristic of the city expressway interchanges. Designers can carry out the adaptability analysis of the interchanges for communications using the design model, so as to conduct the design of the lectotype of the city expressway interchanges.

The invention discloses a three-dimensional virtual fitting system and relates to the technical field of robot vision and digitized costume design. The three-dimensional virtual fitting system is characterized in that the object of costume three-dimensional virtual fitting is a three-dimensional human body model which is built through shooting and processing of a real human body. A customer is shot by a camera to obtain multiple groups of images; contour extraction and feature extraction are carried out on the images in a computer, based on axial deformation of viewpoints, with the human body model as reference, further factors including human body types and the like are considered, and the real-person human body model of the customer is finally obtained; the obtained model is input into the three-dimensional fitting system; through two-way selection, a style, cloth, design and color and the like of clothes are determined by the customer and a designer; the data are input into a 'custom-made system' to complete a costume design, an individual fashion sample is generated automatically and input back into the three-dimensional fitting system, and then a custom ready-to-wear is sewed in a virtual mode and worn on the real-person human body model to display an individual fitting effect intuitively; relative marking is carried out by an evaluation system, and scores can be a reference index for the customer and the designer; and the design level and design efficiency of the costume are greatly improved.

The invention relates to a method for checking a useful load of auxiliary springs of a non-end contact diagonal primary and auxiliary spring, and belongs to the technical field of suspension steel plate springs. The method comprises the following steps: firstly, determining an endpoint deformation coefficient and the half rigidity of each main spring, as well as a deformation coefficient Gx-CB of the contact point between an Nth main spring and the auxiliary spring at an oblique line segment according to a structural dimension and an elastic modulus of the diagonal variable cross-section main spring with non-isostructural end parts; then, checking the useful load of the auxiliary springs of the non-end contact few-leaf diagonal variable cross-section main and auxiliary spring according to the thicknesses of root straight sections of the main springs, Gx-CB of the Nth main spring, the half rigidity of each main spring and a design value of the clearance Delta between the main springs and the auxiliary springs. The simulated verification shows that an accurate checking value of the useful load of the auxiliary springs of the non-end contact diagonal main and auxiliary spring can be obtained by using the method, the design level and performance of products are improved, the vehicle running smoothness is improved, meanwhile, the design, manufacturing and test costs are reduced, and the product development speed is increased.

The invention discloses a system for remotely monitoring the operation state of an engineering vehicle. The monitoring system consists of a vehicle-mounted terminal part, a data transmission part and a monitoring center part, wherein the vehicle-mounted terminal part comprises a monitoring parameter sensor, a data acquirer and a wireless data transmission terminal; the data transmission part comprises a general packet radio service (GPRS) wireless communication network and an Internet network; and the monitoring center part comprises Internet access equipment, a monitoring center computer and monitoring computer software.

The invention discloses a rolling compounding method for an aluminum/magnesium/titanium three-layer composite plate. The characteristics of high strength of titanium alloy, low melting point and good vibration reducing performance of magnesium alloy, good plasticity and space adaptation of the aluminum alloy, and the like, are utilized and the excellent characteristics of respective component metals are combined by the aluminum/magnesium/titanium three-layer composite plate provided by the invention, so that the high-speed impact damage resisting property which the component metals do not own is acquired. Through the control on the ratio and interface of the aluminum alloy, the magnesium alloy and titanium alloy, the degree of fragmentation, melting and atomizing of shred cloud after the buffer composite plate is subjected to high-speed impact is changed and adjusted, so that the form of the shred cloud is changed, the degree of impact damage to a backplate is reduced, and the high-speed impact damage resisting property is increased. The aluminum/magnesium/titanium three-layer composite plate is applied to an outer layer buffer plate in an outer layer protecting structure of an aerospace vehicle and can be used for replacing a traditional single aluminum alloy material. The space environmental effect and protecting level of the space vehicle are increased; the design level of the space vehicle are greatly promoted, and the service life of the space vehicle are greatly prolonged.

The invention relates to a method for verifying strength of each leaf of end contact type few-leaf oblique main and auxiliary springs and belongs to the technical field of suspension leaf springs. It is possible to verify and calculate stress strength of each of main and auxiliary leaves according to structural parameters, elastic model and allowable stress of all main and auxiliary leaves of the end contact type few-leaf oblique variable-section main and auxiliary springs, acting load of each auxiliary spring and maximum load bearable by a main spring. Experiments and simulation tests show that this method is correct, maximum stress verification calculations of all main and auxiliary leaves are accurate and reliable, the design level, product quality and life of the end contact type few-leaf oblique variable-section main and auxiliary leaf springs as well as vehicle driving smoothness may be improved; meanwhile, it is also possible to reduce designing and testing cost and increase product development speed.

The invention discloses a method for detecting a bridge impact coefficient based on a dynamic load test. The method comprises the steps of: (1) detecting and recording deflection data of a bridge; (2) drawing a deflection schedule curve of the bridge; (3) obtaining a bridge impact coefficient muij corresponding to each pair of adjacent wave peak value Xij and wave trough value Yij on the i-th deflection schedule curve of the bridge; (4) obtaining a bridge impact coefficient mui corresponding to a vehicle speed vi; (5) repeating the step (3) and the step (4) until n bridge impact coefficients mu1, mu2, ...mun corresponding to n different vehicle speeds v1, v2, ...vn are obtained; and (6) obtaining a bridge impact coefficient mu. The method for detecting the bridge impact coefficient based on the dynamic load test, disclosed by the invention, has the advantages of rational design and convenience in realization; the bridge impact coefficient obtained by detection is safer, so that dynamic effect of the bridge structure can be reflected more exactly and more rationally under the function of the load of movable vehicles; the practical problem that the conventional impact coefficient cannot reflect exactly that the movable load acts on the bridge structure in form of multiple load points is solved efficiently; and the method for detecting the bridge impact coefficient based on the dynamic load test, has strong practicability and high popularization and application values.

The invention relates to a design method for end part- and root-reinforced few-leaf variable-section steel plate springs, and belongs to the technical field of suspension steel plate springs. The design method disclosed by the invention comprises the following steps: determining the toot thickness he of an equivalent single leaf according to the structure of each steel plate spring, a design rigidity, the thickness ratio of oblique line segments on the root and the end parts, and the thickness ratio of primarily-selected parabolic segments, and determining the maximum allowable thickness [h2] of the root according to an allowable pressure at first; then designing the number N and the root thickness h2 of the few-leaf variable-section steel plate springs according to he and [h2]; and then designing the thicknesses and the lengths of straight segments on the end parts of each leaf separately according to the end part thickness beta he of the equivalent single leaf. Through ANSYS simulation and verification, the accurate parameter design values of the end part- and root-reinforced few-leaf variable-section steel plate springs can be obtained by virtue of the method, the design level and the performance of products are improved, the weights of the springs are reduced, and the running smoothness of vehicles are improved; and meanwhile, the design and test expenses are reduced, and the development speed of the products is increased.

The invention relates to a three-dimensional virtual dressing system of clothes for a real person, relating to the technical fields of clothing design and digital equipment thereof. The system comprises a three-dimensional anthropological measuring system, a three-dimensional dressing system, a tailor-making system, a clothing style database and a fabric database. By a concept interface, a software interface and a hardware interface, smooth transfer and conversion of data among different systems are achieved, and three-dimensional virtual dressing for the real person is realized. The three-dimensional virtual dressing system for the real person has the characteristics that a virtual three-dimensional body model similar to the practical body can be generated in a fast, convenient and vivid manner by connection and integration among all isocitric software and hardware, three-dimensional virtual dressing is carried out on the real-person model. The design level and design efficiency of clothes are greatly improved.

The invention relates to an optimal design method for a spliced and welded plate automobile door, and aims to rationally design the spliced and welded plate automobile door, reduce the number of parts, reduce the weight of the automobile door, improve the rigidity of the automobile door and improve the collision safety of an automobile. The optimal design method comprises the following steps of: determining arrangement of weld lines of the spliced and welded plate automobile door by a bidirectional progressive topological optimization method, namely the design of a splicing and welding scheme; after specific positions of the weld lines are determined, namely the splicing and welding scheme is determined, dividing an inner plate of the automobile door into several regions by the weld lines, wherein the regions represent spliced and welded plates of different thicknesses; and constructing an automobile door system light-weight optimal model based on different working condition responses by a sensitivity analysis method and a size optimization method, performing optimal calculation, and determining the specific thickness of each spliced and welded plate of the inner plate of the automobile door.

The invention relates to a method for designing limiting deflection of few-leaf two-end-reinforced plate springs with ends of non-equal structures, and belongs to the technical field of suspension steel plate springs. The limiting deflection of the few-leaf two-end-reinforced plate springs with the ends of the non-equal structures can be designed by the aid of the method according to structural parameters, elastic modulus and the maximum allowable safety stress of various leaf springs and the free lengths of limiting stoppers. The method has the advantages that as known from sample machine loading deformation experiments and tests, the method for designing the limiting deflection of the few-leaf two-end-reinforced plate springs with the ends of the non-equal structures is correct, accurate and reliable limiting deflection design values can be obtained by the aid of the method, and a reliable technical foundation can be laid for designing the few-leaf two-end-reinforced plate springs with the ends of the non-equal structures and developing CAD (computer-aided design) software; the design level of products can be upgraded by the aid of the method, the quality and the performance of the products and the riding comfort of vehicles can be improved, the design, experiment and test costs of the products can be reduced, and the product development speeds can be increased.

The invention relates to a design method for stiffness matching and diameter of vehicle suspension stabilizer bars and belongs to the technical field of vehicle suspensions, aiming to fill a gap of the reliable optimal design method for diameter of the stabilizer bars due to limitation of radial deformation analytic analysis and inter-coupling of the stabilizer bars and rubber bushings. The design method is characterized by including the steps of firstly, performing matching design on stiffness of angle of roll of a front suspension stabilizer bar system and a rear suspension stabilizer bar system according to vehicle parameters and roll models; secondly, building an optimal design mathematical model of the stabilizer bar diameter d according to the matching design value of stiffness of the angle of roll, the radial stiffness coefficient Kx of the rubber bushings and the deformation coefficient expression Gw of ends of the stabilizer bars so as to obtain the accurate and reliable optimal design value of the stabilizer bar diameter d by means of a Matlab program. By the design method, design level and performance of the suspensions and the stabilizer bars can be improved, riding comfort and safety of vehicles can be improved, and meanwhile, design speed for product development can be increased and cost for design and test can be reduced.

The invention relates to a design method for the arc height of an end-non-isomorphic few-leaf root-strengthening-type steel plate spring, belonging to the technical field of suspension steel plate springs. According to the design method, the initial tangent arc height of the end-non-isomorphic few-leaf root-strengthening-type steel plate spring can be designed according to the structure parameters, the elastic modulus, the rated load and a residue tangent arc height design required value under the rated load of each leaf of spring. According to a model machine loading deformation test, the design method for the arc height of the end-non-isomorphic few-leaf root-strengthening-type steel plate spring is correct; an accurate and reliable initial tangent arc height design value can be obtained; and a reliable technical basis is provided for design and CAD software development of the end-non-isomorphic few-leaf root-strengthening-type steel plate spring. By utilizing the method, the product design level, quality and performance and automobile driving smoothness can be improved; meanwhile, product design and testing cost is lowered; and product development is accelerated.

The invention discloses a ship whole elastic-plastic movement response predication method and system under the action of underwater explosion. The method comprises the following steps: S1, simplifying a ship into a free ship body beam with an equal section; S2, dividing load pressure of the free ship body beam into five time phases under the action of the underwater explosion; S3, solving movement displacement of the free ship body beam in the five time phases under the action of the underwater explosion; S4, solving a bending moment of the ship body beam; S5, solving forward plastic movement parameters of the ship body beam; S6, solving backward elastic unloading movement parameters of the ship body beam; S7, solving backward plastic movement parameters of the ship body beam; S8, solving forward plastic movement parameters of the ship body beam. The invention further provides a system for realizing the method. According to the method and the system disclosed by the invention, the ship plastic movement process is analyzed on the basis of comprehensively considering the impact effect on the whole ship body by impact waves and air bubble loads, and engineering predication of ship whole elastic-plastic movement deformation under the action of the underwater explosion can be accurately and conveniently realized.

The invention relates to a device for adjusting the wing surface of a wing wind tunnel blowing model and an adjustment method. In the device provided by the invention, the width of a support base is equal to the chordwise length of the wing wind tunnel blowing model; the length of the support base is equal to the spanwise length of the wing wind tunnel blowing model; multiple rows of actuators are distributed along the length direction of the support base; each row of actuators comprises multiple actuators; each actuator is respectively positioned on each design point of the wing and corresponds to the horizontal ordinates of each design point of the wing; the actuators are installed on the upper surface and lower surface of the support base in pairs; and the actuators in the same column on the same surface are connected through a data line and used for receiving the same control signals and carrying out the equal amplitude displacement. The invention provides a convenient and practical wing surface deformation adjusting mechanism for the wing surface deformation based on the wing shape design of a wind tunnel experiment, establishes a high-efficiency wing shape optimization design system by means of the environment and conditions of the wind tunnel experiment and provides different wing shape results for the engineering actually, thereby improving the design level and design efficiency of the existing wing shape.