1575 results about "Impact energy" patented technology

The invention belongs to the technical field of vibration analysis and testing of bearings, and particularly relates to a cam driven bearing wear degree monitoring method and system, and the method comprises the steps: carrying out the equal-angle resampling processing of a vibration signal through a rotating speed signal, decomposing an obtained angular domain vibration signal into a plurality of mode components through a variational mode decomposition algorithm, and carrying out the measurement of the vibration signal; according to the kurtosis value of each modal component and the correlation coefficient of each modal component and the original vibration signal, evaluating the impact saliency weight of each modal component, and performing weighted summation on the energy of each modal component to obtain comprehensive impact energy; calculating to obtain a speed decoupling wear index without the influence of the rotating speed by utilizing the comprehensive impact energy and the vibration energy calculated by the physical mapping model; and the speed decoupling wear index is compared with a preset self-adaptive alarm threshold value, and the wear state of the cam driven bearing is judged according to a comparison result. According to the invention, the problems of false alarm and missing alarm under the variable-speed working condition are solved.

The invention discloses a ship equipment vibration test method and system based on frequency domain kurtosis mapping and non-Gaussian signal generation. The ship equipment vibration test method comprises the following steps: collecting an actual ship impact vibration signal and extracting a target power spectral density curve; the method comprises the following steps: identifying an impact energy concentration frequency band based on spectrum energy distribution, carrying out frequency band division by adopting an elliptical filter bank with a second-order section structure, and calculating an envelope kurtosis value of each frequency band to establish a kurtosis-frequency mapping model; after the initial Gaussian driving signal is generated, a non-Gaussian driving signal is generated through a phase randomization and amplitude dynamic scaling algorithm based on a mapping model; a multi-target optimization controller based on Pareto leading edge search is adopted, a power spectral density error and a kurtosis error are taken as optimization targets, synchronous optimization is carried out through fast non-dominated sorting and an adaptive hybrid variation strategy, and a driving signal is output. According to the invention, the broadband and non-Gaussian impact vibration environment of the ship equipment in the actual severe sea condition can be reproduced in a high-fidelity manner, and the authenticity of the test and the fault mode coverage capability are remarkably improved.

The invention provides a vehicle control method and a vehicle, the method is applied to the technical field of vehicle safety, and the method comprises the following steps: obtaining a planned driving track of a target vehicle; on the basis of the planned driving track and the planned driving track of the current vehicle, under the condition that it is determined that the target vehicle will collide with the current vehicle, the collision time of the target vehicle and the current vehicle is calculated, and the minimum lateral collision avoidance distance for collision avoidance is calculated; and matching a protection action of the current vehicle according to the collision time and the minimum lateral collision avoidance distance, and executing the protection action before collision with the target vehicle. The method solves the problems that an existing collision early warning system cannot dynamically adjust the vehicle posture in a short time, a traditional chassis system cannot cooperate with a steering and suspension system to disperse impact energy before collision, the height of a vehicle is fixed, the living space of a passenger compartment is compressed, collision avoidance is difficult to achieve, and the safety is high. And the living space of the passengers cannot be optimized during unavoidable collision.

The invention belongs to the technical field of vehicle protection materials, and particularly relates to a coating for an explosion-proof vehicle. The coating is composed of an adhesion bottom layer, an energy-absorbing middle layer and an anti-impact outer layer, wherein the adhesion bottom layer contains epoxy resin and flaky zinc powder / mica powder, and a laminated shielding structure is formed to improve the adhesion force to be larger than or equal to 8 MPa; the energy-absorbing middle layer is a composite material of modified nano silicon dioxide / polyethylene glycol-based STF and silanized aramid fiber, the viscosity of the energy-absorbing middle layer is sharply increased by more than 50 times at the strain rate of 500s <-1 >, and 65% of explosion impact energy can be absorbed; the anti-impact outer layer adopts a polyurea elastomer to wrap gradient distribution silicon carbide microspheres, pyramid-shaped protrusions are designed on the surface, the fragment defense speed reaches 430 m / s, and the shock wave reflection dispersion is increased by 50%. The whole anti-explosion coating passes UL94V-0 certification through a synergistic flame-retardant system, the chemical protection and self-cleaning capacity is improved through a super-hydrophobic surface layer, and the problems that a traditional anti-explosion coating is poor in adhesive force, weak in composite threat resistance and insufficient in environmental adaptability are solved.

The invention discloses a high-toughness low-yield-ratio steel plate for a bridge and a preparation method of the high-toughness low-yield-ratio steel plate, and relates to the technical field of low-alloy high-strength structural steel, and the steel plate for the bridge comprises the following chemical components in percentage by weight: 0.05% < = C < = 0.09%, 0.20% < = Si < = 0.30%, 1.50% < = Mn < = 1.70%, 0.50% < = Cr < = 0.60%, 0.35% < = Cu < = 0.50%, 0.4% < = Ni < = 0.6%, 0.2% < = Mo < = 0.3%, 0.03% < = Nb < = 0.05%, 0.01% < = Ti < = 0.02%, 0 < = B < = 30 ppm, and the balance of Fe and inevitable impurities. The production method comprises the steps of billet heating and heat preservation; controlled rolling and controlled cooling; the yield strength of the produced steel plate is larger than or equal to 870 MPa, the tensile strength is larger than or equal to 780 MPa, the yield ratio is smaller than or equal to 0.86, the ductility is larger than or equal to 15%, and the impact energy at the temperature of minus 40 DEG C is larger than or equal to 150 J. On the basis that the alloy cost is remarkably reduced, the performance combination of high strength, high toughness and low yield ratio is obtained at the full thickness through process regulation and control, and the steel plate is suitable for the scene of outdoor bridge steel.

Provided is a vehicle structure disposed at a lower portion of a center of a vehicle body, the vehicle structure including: a battery cover, a battery tray, and a structural member A for absorbing impact energy. Each of the battery cover and the battery tray is configured with an integrally molded fiber-reinforced plastic. The structural member A is located outside in a vehicle width direction of at least the battery cover and the battery tray. The structural member A is fastened together with the battery cover and the battery tray.

The invention relates to the technical field of automobile engineering, and discloses a composite sealing strip embedded corrosion-resistant light-weight vehicle door structure which comprises a vehicle door body, a vehicle door edge is arranged on the outer side of the vehicle door body in a surrounding and protruding mode, and a sealing strip assembly is arranged on the inner side of the vehicle door edge in a surrounding mode. Internal gas is bidirectionally shunted through a communicating groove and a vent groove, part of the gas flows into a buffer folding hose to enable the buffer folding hose to rapidly expand and extend, door closing impact energy is absorbed by means of the high resilience characteristic of foamed rubber, a traditional single buffer structure is replaced to realize energy shunting, hard contact force is greatly weakened, and abnormal sound is eliminated. The other part of gas drives sealing rubber extrusion blocks at the upper end and the lower end of a clamping block to expand, so that the sealing rubber extrusion blocks are tightly attached to a vehicle body door frame fitting block, and the defect of compression permanent deformation after a traditional single rubber strip is opened and closed for a long time is overcome in cooperation with the double-sealing effect that a sealing air bag is tightly attached after pressure relief through an exhaust hole.

Described herein are systems and methods for reducing damage to solar tracker systems during severe weather, such as hailstorms. In one example, a solar module assembly, with edge protection against hail damage, includes a solar module that holds a plurality of photovoltaic cells, the solar module having a front surface and a sidewall extending from the front surface. A frame having a frame wall, which includes a first wall, is disposed about a perimeter of the solar module sidewall and supports the solar module. Further, a hail absorption wall extends along and is spaced from the first wall. The hail absorption wall is attached to the frame and resilient and deflectable towards the first wall. The hail absorption wall absorbs impact energy from hail falling in a direction towards the first wall.

The invention relates to the technical field of fiber reinforced composite materials, in particular to a basalt fiber reinforced composite board in a dynamic heavy load environment and a preparation method. The basalt fiber reinforced composite board comprises an upper surface layer, an upper reinforcing layer, a core layer, a lower reinforcing layer and a lower surface layer. According to the invention, rigid nanoparticles and carboxyl-terminated nitrile rubber are introduced to construct a rigid-flexible composite toughening system, and nano aluminum oxide and silicon dioxide are taken as rigid particles and are uniformly dispersed in an epoxy cross-linked network, so that slippage and crack propagation of molecular chains can be effectively hindered, and the rigidity and damage resistance of a matrix are improved; meanwhile, the carboxyl-terminated nitrile rubber is used as reactive liquid rubber, after carboxyl of the carboxyl-terminated nitrile rubber reacts with epoxy groups, the carboxyl-terminated nitrile rubber is distributed in a matrix in a sea-island structure and can serve as stress concentration points, a large amount of crazing and shear bands can be induced, and a large amount of impact energy can be consumed; and the impact toughness is greatly improved while the high strength of the material is maintained.

The invention discloses a rare earth high-performance EH40 marine steel plate and a production method thereof. The rare earth high-performance EH40 marine steel plate provided by the invention comprises the following chemical components in percentage by mass: 0.06 to 0.09 percent of C, 0.20 to 0.30 percent of Si, 1.45 to 1.60 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, 0.035 to 0.050 percent of Nb, 0.035 to 0.050 percent of V, 0.012 to 0.022 percent of Ti, 0.020 to 0.035 percent of Als, 0.0005 to 0.0020 percent of rare earth Ce, less than or equal to 0.40 percent of CEV, less than or equal to 0.20 percent of Pcm and the balance of Fe and inevitable impurities. The performance meets the requirements that the yield strength is larger than or equal to 390 MPa, the tensile strength is 510-660 MPa, the percentage elongation after fracture is larger than or equal to 20%, and the impact energy at the temperature of minus 40 DEG C is larger than or equal to 270

The invention provides a collapsed rockfall accurate identification and monitoring method and device based on AI and machine vision, and relates to the technical field of geological disaster monitoring, and the method comprises the steps: collecting the multi-modal visual data and environmental parameters of a collapse hidden danger region through a cooperative collection system; performing recognition, contour extraction and spatial parameter calculation on the multi-modal visual data through the recognition and positioning model to obtain a contour sequence, a volume sequence, a spatial coordinate sequence and a spatial attitude sequence of the collapsed rockfall; on the basis of the space coordinate sequence, the space attitude sequence and the multi-modal visual data, predicting the movement track and the speed sequence of the collapsed rockfall through a mixed time sequence AI model; inputting the environment parameters, the contour sequence, the volume sequence, the motion trail and the speed sequence into a kinetic energy calculation model, and calculating to obtain the impact energy of the collapsed rockfall; according to the contour sequence, the volume sequence, the motion trail, the speed sequence and the impact energy of the collapsed rockfall, the collapsed rockfall risk level is obtained through calculation.

The invention relates to the technical field of steel for ocean engineering, in particular to a seawater-corrosion-resistant low-alloy high-strength steel plate and a preparation method thereof. A proportioning system of strengthening elements such as C, Nb, V, Ti and Mo is innovatively optimized, meanwhile, Zr, Mg and rare earth elements (La and Ce) are introduced for inclusion modification treatment, and elements such as Cr, Ni and Cu are cooperatively utilized for improving the corrosion-resisting intrinsic performance of a matrix; in the aspect of a production process, a whole-process precise regulation and control technology of controlled rolling, ultrafast cooling and optimized quenching and tempering heat treatment is adopted, and finally the high-performance steel plate with the strength, the toughness and the corrosion resistance cooperatively matched is prepared. According to the steel plate, the excellent mechanical properties that the yield strength is larger than or equal to 690 MPa and the low-temperature impact energy at the temperature of-60 DEG C is larger than or equal to 100 J can be achieved, the excellent corrosion resistance is shown in the harsh seawater environment, the stability of the production process is high, and the steel plate is suitable for industrial large-scale production.

The anti-collision adjustable buffering oil cylinder comprises a cylinder body, a piston rod is slidably connected into the cylinder body, a mounting base is fixedly mounted at the end of the cylinder body, a sealing sleeve is fixedly mounted on the side, away from the mounting base, of the cylinder body, and the end of the piston rod penetrates through the sealing sleeve; according to the technical scheme, through the inner buffering mechanisms at the two ends in the cylinder body, a buffering bearing ring, an inner buffering spring and an inner damper are used for cooperative buffering, rigid impact of the piston plate is avoided, the structure is protected, and the service life of the piston plate is prolonged. The problems of part damage, shortened service life and faults caused by too large pressure difference are solved, meanwhile, the outer buffering mechanism outside the cylinder body counteracts impact energy and blocks impurities through an outer anti-collision plate, an outer buffering spring and an outer damper, the position can be flexibly adjusted, the impact resistance and protection effect can be improved, and the problem that external protection is lacked is solved.

The invention relates to the technical field of research and development of low-temperature bolt steel, and discloses a low-temperature impact performance control process for low-temperature bolt steel. Comprising the steps that S1, in the steelmaking refining stage, purity and uniformity control is conducted, S2, casting blank homogenization treatment is conducted, stress relief and structure regulation are conducted, S3, a heat treatment core process is conducted, structure and toughness balance regulation is conducted, and S4, online detection and dynamic feedback are conducted, and performance stability is guaranteed. By accurately controlling the element proportion of carbon (C), silicon (Si), manganese (Mn), chromium (Cr) and molybdenum (Mo) in steel and combining with an optimized heat treatment process (such as 860 DEG C oil quenching and 640-650 DEG C high-temperature tempering, and the heat preservation time is prolonged to 120 minutes or more), the V-shaped notch impact energy of the material in the environment of-101 DEG C stably reaches 35 J or more, the impact energy of part of samples can reach 50 J or more, and the impact energy of the part of samples can reach 50 J or more. The problem that the low-temperature impact performance is insufficient after wire hardening and tempering is thoroughly solved, and it is ensured that the brittle failure resistance of the bolt is remarkably improved in the ultralow-temperature environment.

The invention relates to the technical field of battery explosion prevention, in particular to an automobile storage battery with an explosion-proof function. A cavity is formed between the battery body and the top cover; a plurality of connecting blocks I are fixedly connected to the battery body; the connecting block I has a heat conduction function; the battery body is in sliding connection with a piston plate; a plurality of second connecting blocks are fixedly connected to the piston plate; according to the storage battery, electrolyte steam is condensed and refluxed through the first connecting blocks which are densely distributed, so that the electrolyte steam cannot flow to the pressure release valve when the storage battery normally operates, the problem of blockage of the pressure release valve is avoided, the pressure release valve can normally release pressure and is high in safety, and in the pressure release process, the first connecting blocks which are originally used for condensation and are densely arranged are not prone to falling off. And a plurality of damping friction areas can also be formed between the first connecting block and the second connecting block, so that relatively large friction resistance is generated to reduce the impact energy of water vapor, the range of the electrolyte sprayed out of the pressure release valve is reduced, and the ignition risk is reduced.

The subject of the invention is an impact energy absorbing device, comprising a shock absorber (3) with a cylinder (3a) and piston rod (3b), a sleeve (1) to be cut and a machining tool (2) surrounding the sleeve (1) to be cut, for machining the surface of the sleeve (1) to be cut, characterized in that the sleeve (1) to be cut is a cylinder (3 a) of the shock absorber (3).

The invention discloses a centrifugal pump blade damage suppression design and optimization method based on multi-physics field coupling, which comprises the following steps: constructing a fluid grid model of a centrifugal pump and carrying out transient flow field numerical simulation comprising a cavitation model and a dispersed phase model to obtain transient flow field simulation results of a cavitation field and a dispersed phase motion field; according to the transient flow field simulation result of the cavitation field, cavitation collapse wall surface energy is calculated, and a first correlation model of the blade geometric parameters and cavitation collapse energy is established; according to a transient flow field simulation result of the dispersed phase motion field, calculating particle impact wall surface energy, and establishing a second correlation model of the geometric blade parameters and the particle impact wall surface energy; and according to the first correlation model and the second correlation model, the cavitation collapse energy and the particle impact energy are controlled to suppress damage generated by multiple physical fields coupled with cavitation and particle impact, and multi-objective optimization is carried out in a mode of minimizing the cavitation collapse energy and minimizing the particle impact energy, so that optimal blade parameters are determined.

The invention discloses a high-uniformity extra-thick 420MPa-grade maritime work steel plate for an extremely low temperature environment and a manufacturing method thereof, and belongs to the field of ferrous metallurgy. The steel plate comprises the following chemical components in percentage by mass: 0.03%-0.07% of C, 0.15%-0.35% of Si, 1.40%-1.70% of Mn, less than or equal to 0.002% of S, less than or equal to 0.010% of P, 0.015%-0.045% of Als, 0.03%-0.05% of Nb, 0.10%-0.30% of Cr, 0.010%-0.020% of Ti and the balance of Fe and inevitable impurities, and the carbon equivalent CEV is less than or equal to 0.36%. The manufacturing process comprises the steps of smelting, continuous casting, blank heating, controlled rolling, controlled cooling and stacking slow cooling. The thickness of the obtained steel plate is 50-100 mm, the yield strength is larger than or equal to 420 MPa, the impact energy at the temperature of-60 DEG C is larger than or equal to 200 J, the strength difference of the whole plate is smaller than or equal to 40 MPa, and the steel plate has high strength, high toughness, good weldability and high uniformity and meets the requirement for the deep and far sea extremely-low-temperature environment.

The invention relates to the technical field of modified polypropylene composite materials, in particular to a polypropylene composite material for thin-wall injection molding and a preparation method thereof.The polypropylene composite material is prepared from 70-85 parts of polypropylene, 1-15 parts of toughened branched resin, 3-5 parts of maleic acid copolymer, 5-10 parts of inorganic filler, 0.1-0.5 part of antioxidant and 0.1-0.5 part of light stabilizer; the toughened branched resin comprises carboxyl-terminated hyperbranched polyester and methoxyl polyethylene glycol, and the mass ratio of the carboxyl-terminated hyperbranched polyester to the methoxyl polyethylene glycol is 1: (2-4). According to the invention, impact energy is dispersed by toughening a branched structure in the branched resin, the energy absorption capacity is enhanced by an mPEG flexible chain, the impact toughness of the polypropylene composite material is remarkably improved through the synergistic effect of the two, and meanwhile, the tensile strength is maintained. The inorganic filler is matched to enhance the rigidity of the polypropylene composite material, so that the balance of toughness and rigidity is realized.

The invention relates to the field of hinge machining, and discloses a buffer hinge assembling device which comprises a sliding mechanism, a clamping assembly and a forming part, a sliding piece is slidably connected to the sliding mechanism, and the clamping assembly is connected to the top of the end face of the sliding piece; the clamping end of the clamping assembly is detachably connected with two inclined and symmetrically-arranged buffer plates, the two buffer plates are used for clamping the buffer air cylinder, the bottom of the end face of the sliding piece is vertically connected with two symmetrically-arranged pressing columns, and the forming part is arranged below the outer sides of the pressing columns; the flexible buffer plate is introduced into the clamping assembly, the flexible buffer plate is accurately embedded between the buffer air cylinder and the hinge base limiting part in the stamping and bending stage, direct rigid contact between metal and the soft air cylinder is avoided, the risks of deformation, cracking or performance degradation caused by extrusion and impact are remarkably reduced, the buffer plate serves as an energy absorption medium, and the service life of the buffer plate is prolonged. Instantaneous impact energy during bending forming is effectively absorbed, and the assembling quality of the hinge is improved.

The application provides a low yield ratio heavy industrial atmospheric corrosion resistant bridge steel plate and a manufacturing method thereof. The steel plate comprises the following components in percentage by weight: C: 0.07% to 0.10%, Si: 0.10% to 0.30%, Mn: 0.60% to 1.00%, P: less than or equal to 0.010%, S: less than or equal to 0.003%, Nb: 0.02% to 0.04%, Ni: 0.15% to 0.35%, Cu: 0.10% to 0.40%, Mo: 0.20% to 0.50%, Cr: 1.50% to 2.40%, Ti: 0.01% to 0.030%, Sb: 0.03 to 0.10%, Al: 0.015% to 0.040%, and the balance of iron and inevitable impurities. The production method of the steel plate comprises the following steps: molten iron pretreatment, smelting, continuous casting, slab heating, rolling and straightening. The steel plate has the following properties: yield strength is greater than or equal to 345 MPa, tensile strength is greater than or equal to 510 MPa, elongation after fracture is greater than or equal to 30%, yield ratio is less than or equal to 0.75, thickness direction section shrinkage is greater than or equal to 70%, and low temperature impact energy at-40 DEG C is greater than or equal to 300 J. The annual corrosion rate of the steel plate in a simulated heavy industrial atmospheric environment is less than or equal to 0.05 mm / a, and the corrosion performance is 4 to 8 times higher than that of common Q345qE.

This disclosure proposes a vacuum circuit breaker, comprising a stationary conductive component and a moving conductive component. The moving conductive component is configured to adjustably move toward and contact the stationary conductive component to achieve the closing action of the vacuum circuit breaker. The solid-sealed pole also includes a buffer energy-absorbing mechanism, which includes a first movable member and a second movable member. The first movable member is located on the side of the stationary conductive component opposite to the moving conductive component. The second movable member is located on the side of the stationary conductive component opposite to the moving conductive component and is movably connected to the stationary conductive component. The second movable member is movably connected to the first movable member. The buffer energy-absorbing mechanism is used to absorb the impact energy generated when the stationary conductive component contacts the moving conductive component. Through the above design, this disclosure utilizes the movable connection design between the first movable member and the stationary conductive component and the movable connection design between the second movable member and the first movable member to construct a buffer structure with two degrees of freedom, thereby achieving a buffer function in the above two degrees of freedom.

The invention relates to the technical field of surfacing, in particular to a high-toughness wear-resistant martensitic stainless steel flux-cored wire and a surfacing method thereof. According to the welding wire, a tubular structure containing Cr-Mo-Ni-V (-Nb) alloy powder wrapped by a low-carbon 13Cr steel belt is adopted, low-heat-input multi-layer submerged-arc welding and 550-560 DEG C postweld heat treatment are matched, a surfacing layer obtains a tempered martensite matrix and a dispersed carbide structure, the hardness reaches 52-56 HRC, the dilution rate is smaller than or equal to 15%, high abrasion resistance, corrosion resistance and hot crack resistance are achieved, and the room-temperature impact energy is 25-28 J.

The invention relates to the technical field of aerospace structure safety, and discloses a flying bird anti-collision device with a foamed aluminum sandwich energy-absorbing structure, the flying bird anti-collision device comprises an assembly frame and an outer frame as the device, the corners of the outer side of the assembly frame are provided with assembly cylinders, and the assembly frame is assembled in the head of an aircraft through the assembly cylinders; the front panel is arranged on the inner side of the assembly frame and is used for bearing a first collision impact; the buffering assembly is arranged on the inner side of the assembling frame and used for buffering the first impact; the sandwich board is arranged on the inner side of the assembly frame and used for bearing the buffered impact; and the rear panel is arranged on the inner side of the assembly frame and is used for bearing the impact which is buffered twice. Through ordered hierarchical arrangement of the front panel, the buffer assembly, the foamed aluminum sandwich panel and the rear panel, a synergistic energy absorption system and a multi-structure synergistic gradient protection mechanism are constructed, impact is decomposed into a plurality of controllable energy dissipation stages, and efficient management and dissipation of impact energy are achieved.

The invention discloses an anti-torsion cross-linked polyethylene insulated power cable applied to the field of cables, which comprises a petal framework composite structure comprising hollow strips, a main support layer and a buffer layer, and an outer layer protection structure formed by branch protection rings and an elastic metal net. The problems that in the prior art, a cable is prone to structural damage and performance degradation under the torsion working condition are solved, a main supporting layer in a petal framework disperses torsion stress through deformation, a buffer layer absorbs impact energy, a hollow supporting layer provides structural rigidity, and the main supporting layer, the buffer layer and the hollow supporting layer form an elastic supporting-buffer energy absorption-rigid stability synergistic system; therefore, the cable with the petal framework composite structure has excellent torsion resistance. And meanwhile, dynamic heat dissipation and temperature regulation and control are realized through fluid circulation of the hollow supporting layer and the sensing array, and the structural integrity and transmission stability of the wire core under complex working conditions are guaranteed.

The invention provides an electrically-driven chassis bionic angle module structure imitating cirific muscles and ostrich achilles tendon, which is applied to the technical field of angle module structure design, and a suspension structure comprises an active adjusting mechanism, a force transmission guide mechanism, a damping hydraulic rod, an arc-shaped spring and a detection mechanism; the active adjusting mechanism drives an adjusting lever through a servo motor to change the posture of the suspension structure and adjust the pre-tightening force of an adjusting spring. The force transmission guiding mechanism is composed of a multi-connecting-rod structure, transmits impact loads generated by wheels to a vehicle body and guides the motion trails of the wheels. The arc-shaped spring generates elastic deformation in the movement process of the suspension structure so as to store impact energy; the damping hydraulic rod provides damping energy consumption for the movement of the suspension structure; the detection mechanism is used for detecting the stress change of the suspension structure and providing feedback for active adjustment. Through the synergistic effect of multi-connecting-rod guiding, arc-shaped spring energy storage and hydraulic damping, graded absorption and stable transmission of wheel impact loads are achieved, and therefore the vehicle running stability and the suspension structure response performance are improved.

The invention relates to the technical field of vehicle transmission systems, in particular to a dual-motor integrated power gear shifting gearbox system which comprises a power driving motor, an oil pump driving motor, a gearbox body, a fixed shaft type two-gear power gear shifting gearbox body, a hydraulic system and a control system. The double-clutch power gear shifting technology is matched with the cooperative control strategy, seamless connection of power in the gear shifting process is achieved, the phenomenon of power interruption of a traditional AMT gearbox is avoided, the AMT gearbox is particularly suitable for climbing, heavy-load operation and other scenes with the extremely high requirement for power continuity, the operation safety and efficiency are remarkably improved, and the application range is wide. The linear speed of a key transmission part is greatly reduced. The linear speed of the gear is a core influence factor of noise and heating, the sliding friction of the tooth surface can be directly reduced by reducing the linear speed, the meshing impact energy is reduced, and the meshing frequency is kept away from the most sensitive frequency band of human ears. Actual measurement shows that the layout change can bring noise reduction exceeding 10dBA.

The invention belongs to the technical field of coating preparation, and provides a modified polysilane epoxy hybrid coating and a preparation method thereof. Firstly, a polyrotaxane silane additive containing cyclic molecules is prepared through a supramolecular self-assembly and chemical end capping technology, the additive forms a unique network after a coating is cured, mechanical stress can be effectively dissipated, and the coating is endowed with ductility; secondly, a controllable free radical polymerization method is adopted, an acrylate copolymer is synthesized, dynamic hydrogen bond units densely distributed on a side chain of the acrylate copolymer form an efficient energy absorption network, and impact energy can be absorbed and dissipated on the microscopic level; in the preparation process of the coating, the epoxy resin, the copolymer and the pigment filler are finely ground and then mixed with auxiliaries such as polyrotaxane silane to prepare a component A; and mixing amino silicon oil with an amine curing agent and a catalyst to prepare a component B. The prepared coating has excellent flexibility and impact resistance while keeping high weather resistance.

A windshield protection cushion device includes a mat that is positionable over a windshield of a vehicle. A resiliently compressible element is integrated into the mat to absorb impact energy from a projectile thereby inhibiting the windshield from being damaged by the projectile. A plurality of tabs is coupled to and extends away from the mat. The tabs are strategically positioned on the mat thereby facilitating each of the plurality of tabs to be folded onto a respective body panel of the vehicle when the mat is positioned on the windshield. Each of the plurality of tabs has an engaging element which releasably engages the respective body panel for retaining the mat on the windshield.

The invention discloses an automobile energy absorption box and a preparation method thereof, and relates to the technical field of automobile collision safety, the automobile energy absorption box comprises a core body front end structure and a core body rear end structure, the core body front end structure is formed by core body front end structure cell element arrays, the core body rear end structure is formed by core body rear end structure cell element arrays, and the core body rear end structure is formed by core body rear end structure cell element arrays. Core body front end structure cell elements and core body rear end structure cell elements are all surrounded by outer side structures surrounding inner side structures, the outer side structures are negative Poisson's ratio structures, the inner side structures are positive Poisson's ratio structures, impact energy is resisted by means of multiple deformation characteristics of torsion, compression and expansion of positive and negative Poisson's ratio synergistic structures, kinetic energy brought by impact is fully absorbed, and the impact resistance is improved. And SLM integral forming is adopted, the defects caused by manufacturing and assembling of a traditional energy absorption box are overcome, and the reliability and durability of the energy absorption box are improved.