644 results about "Sound barrier" patented technology

The invention discloses a control method and device for a mounting and dismounting integrated robot of a sound barrier, and relates to the field of robot control. According to the method, a digital twinborn model and a dynamic environment model are constructed according to original sensor data, and a current environment risk value is determined; a mounting or dismounting sequence is generated based on a sound barrier topology rule, and a motion path and a mechanical arm motion track are generated according to the digital twin model, the dynamic environment model and the mounting or dismounting sequence; rehearsing the motion path and the motion track of the mechanical arm in the digital twin model, and when a rehearsing result meets a preset requirement, generating an initial instruction based on the motion path and the motion track of the mechanical arm; the current clamping force is determined through an impedance control algorithm, the current hoisting parameter is determined according to the load weight, the initial instruction is adjusted according to the current clamping force, the current hoisting parameter and the current environment risk value to obtain a control instruction, and the control instruction is executed. By implementing the technical scheme provided by the invention, the mounting and dismounting efficiency is improved, and the operation safety is enhanced.

The invention discloses a carbon fiber composite material sound barrier forming device, and relates to the technical field of sound barrier forming, the carbon fiber composite material sound barrier forming device comprises a working bottom table and a first supporting column, the first supporting column is fixedly connected to the top surface of the working bottom table, an upper mold is installed on the lower surface of the top end of the first supporting column, a sound insulation barrier is arranged on the working bottom table, and an auxiliary assembly is arranged on the working bottom table; production and forming of the carbon fiber composite material sound barrier are divided into simultaneous operation of four stations with coherent processes, the four stations do not interfere with one another during operation, and the problems that in the traditional hot press forming process, equipment is in an idle state during cooling, demolding and other steps, four stations are adopted for simultaneous operation, and when one station is used for cooling and demolding, the equipment is not in an idle state are solved. Other stations can be used for machining, residue removal or release agent spraying, feeding and other operations, the equipment utilization rate is greatly improved, no obvious intermittency exists in the production process, and therefore more carbon fiber composite material sound barriers can be produced in unit time.

The partial or full dehydration of organic or inorganic matter containing water by induction of matter into a vacuum and processing matter through a specially designed acceleration channel is disclosed. The inducted matter accelerates in air from zero speed to sub-sonic speed to reach supersonic speed. As the material transitions the sound barrier, it is subject to acoustic shock waves and an instant negative pressure drop occurs. The sound waves disintegrate, disinfect the material and extract part or all moisture from any organic or inorganic material.

The embodiment of the invention discloses a noise reduction regulation and control method and device for a self-adaptive sound barrier and a medium, and relates to the technical field of noise reduction, and the method comprises the steps: collecting multi-source vehicle noise data which comprises current sound pressure signal time sequence data, preposed sound pressure signal time sequence data and preposed vehicle point cloud data, according to the front sound pressure signal time sequence data and the front vehicle point cloud data, determining a noise source position prediction result corresponding to a sound barrier front node so as to perform sound field prediction on the sound barrier node, and determining a corresponding sound field energy distribution thermodynamic diagram; according to a preset sensitive frequency band threshold value, a target noise high-frequency band needing to be offset is determined in the sound field energy distribution thermodynamic diagram, so that a reverse sound wave signal corresponding to a phase array offset module is generated, and the target noise high-frequency band is offset; and according to the current sound pressure signal time sequence data and the reinforcement learning strategy, determining dynamic sound absorption regulation and control parameters of the dynamic sound absorption module so as to absorb a low-frequency band.

The invention provides a sound barrier corrosion state identification method based on image and multi-sensor data fusion, and relates to the field of data processing. The method comprises the following steps: acquiring image data and multi-sensor data of a target area of a target sound barrier; extracting a first corrosion area feature from the image data; according to the multi-sensor data, constructing a second corrosion area feature by adopting GRU coding; based on the first corrosion region feature and the second corrosion region feature, calculating by adopting a space-time diagram neural network to obtain a corrosion risk score of the target region; and determining the corrosion state of the target sound barrier according to the corrosion risk score. By implementing the technical scheme provided by the invention, the accuracy of identifying the corrosion state of the sound barrier is improved.

The invention provides a laser plasma sound barrier and magneto-rheological antiknock array collaborative protection method. The method comprises the following steps: firstly, constructing a collaborative protection structure consisting of a laser plasma sound barrier layer and a magneto-rheological antiknock array layer; a shock wave leading signal is detected in real time and input into a preset multi-dimensional feature model, the model dynamically generates a protection strategy, and a sound barrier instruction and an anti-explosion instruction are output respectively. The laser plasma sound barrier layer outputs specific reverse sound waves according to a sound barrier instruction and attenuates shock waves through destructive interference; meanwhile, the magneto-rheological anti-explosion array layer instantaneously solidifies a magnetic field according to an anti-explosion instruction, and shock wave energy is efficiently absorbed. According to the laser plasma sound barrier and magneto-rheological anti-explosion array cooperative protection method provided by the invention, the cooperative protection structure and the preset multi-dimensional feature model are constructed, so that the cooperative effect of the sound barrier and the anti-explosion array is realized, the response speed to shock waves is increased, the energy processing efficiency is improved, and the adaptability and reliability of protection are enhanced.

The invention discloses an integrated photovoltaic sound barrier which comprises a single-face power generation photovoltaic sound barrier module, a sound barrier interaction module and a double-face power generation photovoltaic sound barrier module. The structures of the single-sided power generation photovoltaic sound barrier module, the sound barrier interaction module and the double-sided power generation photovoltaic sound barrier module are constructed to be stacked up and down to form a photovoltaic sound barrier body, so that full-frequency noise within the range of 200Hz-2000Hz is effectively absorbed. According to the photovoltaic sound barrier, the photovoltaic power generation function and the sound absorption and insulation noise reduction function of the photovoltaic sound barrier are integrated, through modular design and stacking assembly, the use area and the power generation efficiency of a photovoltaic assembly are effectively improved, the sound absorption frequency band is widened, and the noise reduction effect is improved.

The invention relates to a dynamic control method, system and device for a photovoltaic sound barrier and a medium, and the method comprises the steps: carrying out the dynamic adjustment of the transparency of a photovoltaic cell in the fixed semitransparent photovoltaic sound barrier according to the optimal coverage rate of the photovoltaic cell; according to the acoustic analysis model and the photovoltaic power generation model, obtaining a first inclination angle when the noise reduction effect of the rotary photovoltaic sound barrier is optimal and a second inclination angle when the photovoltaic power generation power of the rotary photovoltaic sound barrier is optimal; establishing a decision optimization model according to the first inclination angle, the second inclination angle and the optimal coverage rate of a photovoltaic cell in the fixed semitransparent photovoltaic sound barrier; and inputting the first inclination angle and the second inclination angle into a decision optimization model for optimization processing to obtain an optimal inclination angle, and controlling the rotary photovoltaic sound barrier to rotate to an optimal working angle based on the angle. The intelligent control degree of the photovoltaic sound barrier is improved, and the noise reduction effect and the power generation efficiency are both improved.

The utility model discloses a novel road sound barrier, and belongs to the technical field of sound absorption and insulation and noise reduction. The novel road sound barrier comprises connecting stand columns arranged at certain intervals and composite plates arranged between the adjacent connecting stand columns, the bottoms of the connecting stand columns are fixed to a base, each composite plate is provided with a metal shell formed by connecting a perforated panel, a back plate and an end keel, and sound absorption cotton / plates are arranged on the metal shells. An elastic supporting metal net is fixedly arranged between the back plate and the sound absorption cotton / plate; sound absorption holes are formed in the perforated panel; the end keel is of a rectangular frame structure and is fixedly connected with the edge of the panel with the holes and the edge of the back plate. The sound absorption device has the beneficial effects that the elastic supporting metal net can be conveniently mounted on the back plate and plays a role in stably supporting the sound absorption cotton / plate; the rainproof structure of the composite board can prevent rainwater from entering the composite board; the novel road sound barrier is convenient to install and construct, stable in structure and capable of meeting the long-time application requirement.

The embodiment of the invention discloses a sound barrier optimization method and device based on a noise source database and a medium, and relates to the technical field of sound barriers, and the method comprises the steps: collecting the multi-source noise time sequence data corresponding to a target road, carrying out the noise feature extraction and noise prediction based on the multi-source noise time sequence data, constructing the noise source database, and obtaining the noise source database; the noise source database comprises a real-time noise feature database corresponding to a current time node and a predicted noise feature database corresponding to a future time node; performing multi-period noise propagation simulation on the noise sensitive area of the target road through the real-time noise feature database and the predicted noise feature database, determining sensitive noise data corresponding to multiple time nodes, and determining a multi-period constraint condition corresponding to the sound barrier; and based on the multi-period constraint condition and a preset multi-objective optimization algorithm, determining a corresponding sound barrier design parameter solution set, so as to determine a sound barrier optimization strategy according to the design parameter solution set.

The invention discloses a sound barrier sound insulation characteristic evaluation method suitable for a real ship complex sound field, and belongs to the technical field of real ship sound barriers, and the method comprises the steps: arranging hydrophone arrays at acoustic mirror symmetry positions at two sides of a real ship fairing sound barrier to form an in-situ measurement pair; controlling the ship to sail at a plurality of navigational speeds, and synchronously acquiring sound pressure time domain signals on two sides; carrying out preprocessing and time-frequency analysis on the signals, and calculating sound pressure levels of a sound facing surface and a sound backing surface to obtain an in-situ sound pressure level difference; and based on the sound pressure level difference at different navigational speeds, analyzing the change rule of the sound insulation performance along with the frequency and the navigational speed, and carrying out comprehensive evaluation. In addition, by arranging a vibration sensor and a turbulence measuring device, path separation of structural sound and flow-induced noise is achieved, spatial coherence weighted average is introduced, and the accuracy and representativeness of evaluation under a complex sound field are improved. The method overcomes the limitations of laboratory test environment distortion and single working condition, and can truly and comprehensively reflect the actual sound insulation efficiency of the sound baffle in the dynamic navigation of a real ship.

The invention provides a production method of a road sound barrier with light weight, high strength, corrosion resistance and strong sound absorption, and belongs to the technical field of road sound barriers, the production method comprises the following steps: collecting a traffic noise sample by using a high-precision microphone array, extracting noise spectrum characteristics by using a Noi seSpecNet model, and determining that the main noise frequency band is 500-4000 Hz; optimal perforation parameters are calculated through the model; accurately perforating the UHPC board according to the optimized parameters; the perforated UHPC board, basalt fiber cloth, a through-hole ceramic board, a sound insulation felt and other materials are bonded according to the sequence and technology to form a multi-layer composite structure; curing and curing in a constant-temperature and constant-humidity environment; carrying out acoustic performance testing; and finally, the qualified sound barrier unit is installed on a foundation structure and subjected to protection treatment. According to the method, the technical problem that a road sound barrier in the prior art is difficult to realize efficient sound absorption for traffic noise of a specific frequency band is solved.

The utility model provides a sound barrier plate processing device, including a rotating disk, a processing platform and a connecting rod, wherein the connecting rod is located on one side of the processing platform and is movably connected by a connecting shaft installed therebetween, and an electric push rod is nested and installed on the outer side of the rotating disk. The electric push rod is telescopically operated to adjust the bending angle of the bending plate and the sound barrier plate, so that the pressure roller can transfer the sound barrier plate to the bending plate 10 for bending, and the rotating rod and the limiting rod can be used to clamp and limit the two sides of the sound barrier plate and transport it for use, and the operation of the telescopic rod allows the pressure roller to fit and clamp the sound barrier plate, and the pressure block is used to extrude and punch the sound barrier plate to improve the fit of the pressure roller to the sound barrier plate and embed the limit, thereby improving the bending effect of the bending plate when pushing the sound barrier plate to bend, and at the same time improving the bending efficiency, and at the same time, the sound barrier plate is squeezed and punched by the pressure block to improve the sound insulation and noise reduction effect of the sound barrier plate when it is used.

The invention belongs to the technical field of underwater acoustic detection. The invention provides an underwater target motion state evaluation method based on a distributed sound barrier system. According to the embodiment of the invention, the two-dimensional coordinate of the target passing through the sound barrier for the first time, the target speed and the navigation angle are used as to-be-estimated parameters, and a parameter estimation problem is converted into a linear equation set solving problem; and substituting the delay inequality of the target crossing the sound barriers into the equation, solving the target motion state estimation, and further calculating the distance between the target and the sound source when the target crosses each sound barrier. Under the lowest standard that the product of the number of the sound sources and the number of the receivers is not smaller than 4, the method can be used for any sound transmission system composed of the multiple sound sources and the receivers, universality is higher, and the state estimation result is accurate and reliable.

The invention relates to the technical field of bridges, in particular to a bridge and sound barrier integrated structure for driving in a beam. A bridge and sound barrier integrated structure for driving in a beam comprises a box beam, the box beam is of a concrete structure, the interior of a box beam cavity of the box beam is used for driving of a train, a box beam bottom plate is provided with a bottom plate cross beam, the bottom plate cross beam protrudes out of a box beam web plate, and the bottom plate cross beam is used for anchoring a stay cable or a sling; the track is arranged on a bottom plate of the box girder, and the track extends in the length direction of the box girder. Compared with the prior art that the train runs on the bridge floor and a sound barrier needs to be arranged on the bridge floor, the train of the structure can directly run in the box girder cavity, the step of arranging the sound barrier on the bridge floor is omitted, and the construction efficiency is improved. And as no sound barrier is arranged, the situation that the sound barrier is damaged is avoided as far as possible, and therefore potential safety hazards caused by damage of sound barrier components in the long-term operation process are avoided.

The invention discloses a sound barrier-based viaduct noise radiation prediction method and device and a medium, and relates to the technical field of noise radiation prediction, and the method comprises the steps: obtaining noise source data, and carrying out the noise feature extraction of a noise source state of the noise source data, so as to obtain a noise source feature matrix; obtaining dynamic environment data, and performing environment key parameter analysis on the dynamic environment data to determine environment parameters; based on the noise source feature matrix and the environmental parameters, a noise radiation path is obtained through mixed sound ray tracking; according to the noise radiation path, initial arrangement data of the sound barrier are determined through sound barrier interception configuration; and carrying out sound barrier interception optimization on the initial arrangement data of the sound barrier to obtain a multi-source sound barrier configuration strategy. According to the method, the technical problem that noise radiation prediction in a viaduct environment cannot meet sound barrier arrangement is solved.

The invention provides a sound barrier multi-risk fusion identification method and device based on deep learning, and relates to the field of data processing. The method comprises the following steps: acquiring detection data for target sound barrier risk detection; determining risk assessment data corresponding to the risk factors according to the detection data; carrying out data fusion on the risk assessment data by adopting a deep learning model to obtain risk category probability distribution; and determining whether the target sound barrier has a risk based on the risk category probability distribution. By implementing the technical scheme provided by the invention, the accuracy of sound barrier risk identification can be improved.

The invention discloses a wind power generation sound barrier, and relates to the technical field of sound-absorbing barriers, and the wind power generation sound barrier comprises a sound barrier which is used for being installed beside an external road and used for absorbing noise generated by motor vehicle driving; a plurality of groups of sound barriers can be spliced to define a length-adjustable sound absorption structure; airflow generated when a motor vehicle passes through the sound barrier drives the generator to operate and generate electricity through the driving wheel, the turbine-shaped blades are driven by the airflow generated when the motor vehicle runs to rotate, kinetic energy which is originally wasted is converted into electric energy, and energy recycling is achieved; the total length of the sound barrier and the density of the generator set can be flexibly adjusted according to the road length and the traffic flow through the combination of the spliced sound barrier unit and the multiple groups of independent power generation units (driving wheels and generators), and the requirements of different scenes are met.

The invention provides a modularized installation and construction method for a semi-closed sound barrier of a high-speed railway, and belongs to the technical field of semi-closed sound barriers of high-speed railways. Comprising a road surface, sound absorption barriers are arranged on the left side and the right side of the road surface respectively, high-precision sound pressure sensors are arranged on the inner side surfaces, close to the left side and the right side, of the sound absorption barriers respectively, and a broadband frequency analyzer is connected to the bottoms of the high-precision sound pressure sensors. A solar photovoltaic power generation function and a noise reduction function of the sound barrier are combined by arranging the photovoltaic panel on the outer side of the arc-shaped sound absorption barrier, in addition, the high-precision sound pressure sensor, the broadband frequency analyzer and the intelligent control system are fused into an intelligent monitoring sound barrier module through the intelligent technology, and a noise monitoring sensor, an environment monitoring sensor and other sensors are integrated; the noise level, the air quality, the temperature, the humidity and other environmental parameters around the sound barrier are monitored in real time, data are transmitted to the management center, and the performance state of the sound barrier and the change of the surrounding environment are known in time through data analysis.

The invention relates to the technical field of multi-layer material preparation, in particular to a high-light-transmittance weather-proof impact-resistant striped sound insulation board. The problem that transparency, weather resistance and sound insulation effect of a traditional stripe material are difficult to consider at the same time is solved. The light scattering and absorption center is reduced and high transparency and low haze are realized through reactive extrusion of the recycled material, combination of high-temperature adsorption activated carbon, multi-stage high vacuum and deep purification of a reactive decolorizing agent, and matching of transparent dispersion diffusion master batch and a compatilizer. The surface layer adopts the core-shell weather-resistant master batch and the secondary high-energy UV fluorosilicone curing coating for double shielding of ultraviolet and inhibition of photodegradation and yellowing; styrene-maleic anhydride damping resin is introduced into the middle layer, and uniform inclined micropores and asymmetric stripes formed by supercritical CO2 are combined, so that the medium and low frequency sound insulation index is improved; the bottom layer is repaired and guaranteed to be durable in impact resistance by virtue of a core-shell toughening agent and molecular chain extension; the defects of traditional products are overcome, and the service life requirement of sound barriers for expressways and rail transit is met.

The present invention discloses a rail transit sound barrier based on phononic crystal cells, which is divided into several cells of equal volume by dividing modules; a resonance cavity with an opening on one side is embedded in each cell; one side of the opening of the resonance cavity faces the sound source; the opening extends outward in a trumpet shape to increase the sound receiving area; several phononic crystal cells that do not contact each other are fixedly arranged in the resonance cavity; the resonance cavity in the present invention can achieve triple acoustic performance improvements, namely sound insulation, sound elimination and sound absorption: its overall appearance belongs to a Holmhelix resonance cavity, which is itself a good sound elimination device, which is the first sound elimination; the trumpet-like opening structure on the sound source side is conducive to the introduction of sound waves, and the phononic crystal cells are arranged inside, which is the second sound insulation of the device; the tail adopts a boss with the same size as the end of the trumpet mouth, which is conducive to the flow of sound waves, and a certain thickness of sound-absorbing rock wool is used on the inner wall of the tail, which is the third sound absorption.

The invention discloses a sound barrier made of a tailing material and a preparation method of the sound barrier, and belongs to the technical field of sound barriers. The sound barrier comprises a base material, a functional additive and a self-healing additive, and the base material mainly adopts tailing particles and is compounded with alumina powder, Portland cement and nano-hydroxyapatite; the functional additive is prepared from a polypyrrole-polyaniline compound, silicon dioxide nano aerogel, nano molybdenum disulfide particles and polyacrylate coated paraffin microcapsules; the self-healing additive is prepared from polyurethane coated epoxy resin microcapsules, polyurethane coated amine curing agent microcapsules, CaCO3 microcrystals, nano montmorillonite particles and nano nickel coated carbon particles. Resource utilization of the tailings is achieved, and the mechanical property, the sound absorption and insulation performance, the self-healing performance and the weather resistance of the sound barrier are remarkably improved.

The utility model relates to the technical field of sound barriers, in particular to a sound barrier with a protection mechanism, and adopts the technical scheme that the sound barrier with the protection mechanism comprises stand columns, a barrier plate, grooves, convex blocks, a protection plate and first anchoring holes; three barrier plates which are arranged from top to bottom are arranged between the two stand columns which are opposite in the left-right direction, grooves are formed in the stand columns, the left sides and the right sides of the barrier plates are fixedly connected with protruding blocks matched with the grooves, the front portions and the rear portions of the stand columns are each provided with two protection plates located at the joints of the barrier plates, and four first anchoring holes are formed in each protection plate. According to the sound barrier, an existing sound barrier is improved, the protection plates located on the front side and the rear side of the joint of the barrier plates are additionally arranged on the stand columns, the protection plates are tightly attached to the joint of the barrier plates, the joint of the barrier plates is protected, the phenomena of air leakage and sound leakage at the joint of the barrier plates can be prevented, and the noise reduction efficiency of the sound barrier is improved.

The utility model discloses a sound barrier structure arranged back to a noise source, which comprises a T-shaped device body, the top end of the device body is provided with a sound absorber structure, the sound absorber structure comprises a plurality of tip sound absorbers which are arranged in sequence, each tip sound absorber is of an isosceles right triangle structure, and the tip sound absorbers are arranged at the top end of the T-shaped device body. The first right-angle side of each tip sound absorber serves as the bottom of the tip sound absorber and is connected with the top end of the T-shaped device body, the first right-angle sides and the inclined sides are arranged in the mode that the first right-angle sides and the inclined sides do not face a noise source, namely the second right-angle sides are opposite to the noise source, and the second right-angle side of each tip sound absorber serves as the height of the tip sound absorber and is right opposite to the noise source in a vertical mode. Compared with the prior art, the sound barrier structure has the highest insertion loss value within the center frequency range of 500 Hz to 1600 Hz, so that the sound wave absorption rate is highest, and the noise reduction effect is best.

The invention discloses an expressway noise prediction and sound barrier noise reduction effect evaluation method and system, and the method comprises the steps: obtaining historical noise monitoring data of an expressway, carrying out the division according to measurement points, and carrying out the matching of traffic flow data and meteorological data; obtaining influence factors of expressway noise, and analyzing noise feedback characteristics under different influence factors to construct a noise prediction model; acquiring multi-source data of a target expressway section, and importing the multi-source data into the noise prediction model to obtain a noise prediction value of the target expressway section; and obtaining noise reduction effect evaluation results of the different types of sound barriers according to the noise prediction value and the noise reduction attributes of the different types of sound barriers, and generating a sound barrier type selection scheme according to the applicability of the sound barriers. According to the method, the noise value of the target expressway section is monitored and predicted according to the influence factors of expressway noise, a data basis is provided for reasonably arranging the sound barrier, in addition, the noise reduction effects of different types of sound barriers are evaluated, the optimal sound barrier type selection is matched, and the noise reduction effect is improved.

The invention discloses a sound barrier self-adaptive acoustic diffuser regulation and control method, equipment and a medium, and relates to the technical field of sound barrier regulation and control. The method comprises the steps that noise signals on the two sides of a sound barrier are collected, and traffic flow data and meteorological parameters are synchronously obtained; performing multi-scale spectrum analysis on the noise signal to obtain spectrum features; calculating a sound field coupling effect between adjacent units according to the topological connection relationship of the diffuser units; inputting the spectrum characteristics, the traffic flow, the meteorological parameters and the sound field coupling effect into a pre-trained mapping model to generate a regulation and control instruction; the diffuser units are driven to adjust geometric parameters according to the regulation and control instruction, the adjustment priority of the diffuser units is distributed, and the geometric parameters comprise the groove depth and the distance between every two adjacent units. According to the method, the wide-frequency-band noise suppression effect is improved, the sound energy transfer matrix is constructed, the insertion loss contribution rate is calculated, the priority is scientifically distributed and adjusted, and overall performance reduction caused by local optimization is avoided.

The invention discloses a method for evaluating a subjective noise reduction effect of a photovoltaic sound barrier. The method comprises the following steps: measuring, collecting and analyzing a sound sample before noise control; establishing a sound barrier prediction model, and calculating sound barrier insertion loss; synthesizing a noise-controlled sound sample; according to the sound sample before noise control, the sound sample after noise control and the sound barrier prediction model, calculating or measuring to obtain related parameters; and calculating the reduction percentage of the annoyance degree, and evaluating the subjective noise reduction effect of the photovoltaic sound barrier. Through the steps of collecting a sound sample before noise control, establishing a sound barrier prediction model, synthesizing a sound sample after noise control and the like, the annoyance degree reduction percentage calculated based on a sound absorption coefficient and psychoacoustic parameters is obtained, subjective experiments are not needed in the whole evaluation process, time and labor are saved, operation is easy and convenient, and evaluation is rapid and accurate.

The invention provides a resonant cavity broadband sound barrier based on a double-helix acoustic black hole. The resonant cavity broadband sound barrier comprises a plurality of double-helix acoustic black hole resonant cavity broadband sound absorption structure cells and a supporting and connecting assembly. The multiple double-spiral acoustic black hole resonant cavity broadband sound absorption structure cells are connected together through the supporting and connecting assemblies, and a plate-shaped sound barrier is formed; the double-spiral acoustic black hole resonant cavity broadband sound absorption structure cell is in the shape of a hollow regular hexagon nut, the inner side face of the cell is open, and six cavities with the inner sides open are formed in the cell. Two spiral curved surface rolling plates with the same or different spiral curve parameters are arranged in each cavity; the curved surface of the spiral curved surface rolling plate is perpendicular to the upper end face and the lower end face of the double-spiral acoustic black hole resonant cavity broadband sound absorption structure cell. A plurality of protruding teeth are distributed on the inner side face and the outer side face of the spiral curved-surface rolling plate. The invention has the advantages that the broadband sound absorption characteristic is realized; certain ventilation and lighting performance is achieved, and the driving environment of an inner channel of the closed traffic sound barrier can be more comfortable.

The invention belongs to the technical field of road traffic noise reduction, and particularly relates to a sound barrier shape optimization method based on an isogeometric particle swarm singular boundary method. Comprising the steps of building a sound barrier geometric model, building a sound barrier shape optimization model, building a Burton Miller type singular boundary method program, calculating sound pressure, carrying out particle swarm iterative solution, outputting an optimization result and the like. According to the method, the model is optimized based on the isogeometric singular boundary method of the basic solution of the acoustic control equation for the first time, the model is applied to the optimization design of the sound barrier, the sound barrier is optimized by combining the particle swarm optimization method, only the size of the target function is needed, complex sensitivity derivation is not needed, and when the sound barrier with the complex shape is calculated, the method is simple and convenient to operate. The method has great flexibility and high efficiency, seamless integration between CAD and CAE is realized by introducing isogeometric analysis, namely representing geometric boundaries by using an NURBS function, and a tedious grid division step in an optimization process is avoided, so that the precision and efficiency of sound barrier optimization are remarkably improved.

The utility model relates to a staggered and superposed wave-shaped sound barrier which comprises a base and a frame. The base is fixedly connected with the frame, and the plate body, the first wave-shaped screen body assembly and the second wave-shaped screen body assembly are sequentially installed on the inner side of the frame from front to back. Wherein the first wave-shaped screen body assembly and the second wave-shaped screen body assembly are similar in structure, each wave-shaped screen body assembly is composed of a plurality of wave-shaped sound absorption strips, and the left side face and the right side face of each wave-shaped sound absorption strip are both wave faces; the wave-shaped sound-absorbing strips in the first wave-shaped screen body assembly and the wave-shaped sound-absorbing strips in the second wave-shaped screen body assembly are arranged in a staggered manner, are overlapped with each other and then are fixedly connected with the plate body; and a wave-shaped sound barrier is formed. According to the wave-shaped sound barrier, the two layers of wave-shaped screen body structures are overlapped in a staggered mode, so that the path of sound waves is more complex when the sound waves pass through the sound barrier, the reflection, diffraction and absorption capacities of the screen bodies on noise are improved, noise energy is effectively weakened, meanwhile, the sound barrier can present rich light and shadow effects and dynamic aesthetic feeling along with changes of light rays and observation angles, and the sound barrier is more attractive. And the appearance is more attractive.