8results about How to "Guaranteed stress" patented technology

The invention discloses a variable-cross-section stacked box rigid frame aqueduct, a cantilever hanging basket and a prestress tensioning method in the field of prestressed concrete aqueducts, the transverse section of a water passing groove is a U-shaped section, and the U-shaped section of the water passing groove is far superior to a rectangular section in the aspects of water delivery flow conditions and flow passing capacity; a prestress continuous rigid frame structure form of a U-shaped water passing upper tank with a variable cross-section rectangular lower tank stacked upwards and a guide groove unified cross section and a two-system four-way prestress system are arranged, the concrete stress of the upstream face of the U-shaped water passing groove can be accurately and effectively controlled to be kept in a uniform compression state with a certain numerical value, and the anti-seepage and durability functions of the aqueduct are ensured. According to the tensioning method, the vertical steel beams and the U-shaped steel beams are partially tensioned firstly, so that the aqueduct web has certain vertical pressure stress, then longitudinal prestress is tensioned, the effect of the vertical steel beams and the U-shaped steel beams is prevented from being weakened by the longitudinal prestress, and pressure stress reserve of the upstream face of the U-shaped groove is guaranteed; the pouring hanging basket prevents the formwork from floating or shifting in the pouring process of the variable-thickness middle partition plate.

The application relates to a cable tower beam construction method and a steel structure beam cable tower. Seamless steel pipes and prestressed bundles are arranged in the concrete of upper and lower partitions of tower columns corresponding to beams, after end section segments of the beams are hoisted and positioned, the end section segments and the tower columns are anchored by tensioning the upper and lower layer prestressed bundles. The end section segments of the multiple beam sections are anchored first, and then the middle section segments are hoisted and closed section by section. The connection between the beam sections adopts the mode of first three-face riveting positioning and then top-face welding fixing. The rivets can absorb and disperse energy through slight deformation, relieve stress concentration and avoid brittle fracture in the tensile zone. The reliable connection between the beam and the tower column is realized through double-layer prestressed bundles, and the stability of the structure stress is ensured through the riveting and welding combined connection mode of the multiple beam sections.

This invention relates to the field of electronic packaging technology and discloses a multi-physics coupled packaging simulation method, including S1, macroscopic equivalent model construction, which establishes a macroscopic packaging model containing multi-physics loads and performs equivalent processing on the microscopic complex structure to efficiently obtain the overall temperature, displacement, and stress distribution; S2, key region identification, which combines macroscopic equivalent modeling with microscopic fine modeling and establishes a macro-micro bidirectional coupling mechanism to enable the macroscopic structural response and microscopic local behavior to be solved collaboratively under the same analysis framework; at the same time, combined with an adaptive iteration strategy, the microscopic model is dynamically introduced only in key high-risk areas to avoid the degree-of-freedom explosion problem caused by global fine modeling, thereby significantly reducing the overall computational scale while ensuring the accuracy of stress and strain prediction in key areas, effectively solving the problem of "difficulty in balancing accuracy and efficiency" in the prior art, and achieving a unity of high efficiency and high accuracy in multi-scale simulation.

This invention discloses a system and method for monitoring the stress and frequency of main beams and piers during the construction of long-span bridges, belonging to the field of bridge stress and frequency monitoring technology. It includes a strain data acquisition module, a communication module, and a PC server. During the main beam construction process, this invention utilizes the stress data acquisition module to perform stress tests on completed segments. Combined with the current construction stage, a bridge calculation model is used to make an overall evaluation of the stress data, thereby enabling timely adjustment measures to ensure that the stress of the main beam and piers remains within allowable ranges.

The invention discloses a sound column, which is applied to a musical instrument. The musical instrument comprises a box body, the box body comprises a panel and a back plate, the sound column comprises a column body and a top support part, the column body is arranged between the panel and the back plate; the top support part is arranged on the column body, and the top support part is retractable; wherein, the box body is provided with an adjustment hole, the adjustment hole is used to adjust the retraction of the top support part, and a tool is first inserted into the adjustment hole and then into a slot of a screw rod, and then the tool is rotated to make the screw rod rotate and move, thereby making the top support part extend or contract, so as to adjust the supporting strength of the sound column, avoid the panel and the back plate from being deformed to a certain extent along the supporting direction, so as to weaken the stress and cause the sound column to loosen or fall off, so as to solve the technical problems of inconvenience, time-consuming and labor-intensive in adjusting the sound column in the prior art. Compared with the prior art, the user can adjust the sound column by himself, and the sound column can be adjusted to be loose or tight, which is simple and convenient, and saves time and labor.

This invention discloses a method for the overall hoisting construction of large-span spatial steel space frames using finite element analysis and BIM technology. This method first verifies the overall stress performance of the space frame through finite element analysis, determining the optimal hoisting points and wire rope parameters. Then, it uses BIM to assist in determining the ground assembly position of the space frame, selecting the appropriate crane type, determining the optimal crane hoisting position, and simulating the hoisting route to determine the optimal hoisting trajectory. By integrating a resistance strain monitoring system into the BIM software, the stress values ​​of each major load-bearing member of the space frame model during assembly and hoisting are directly displayed in the model. Corresponding stress thresholds are set according to specifications, allowing for intuitive monitoring of stress changes in each major load-bearing member. This ensures that any abnormalities are identified and their causes are determined immediately, enabling continuous monitoring throughout the entire space frame installation process and ensuring overall safety during hoisting.

The utility model discloses a winding structure of a cylindrical battery, which comprises a winding core and a core rod arranged in the winding core, the winding core is annular, the winding core comprises the core rod, a positive pole piece and a negative pole piece, the outer surface of the core rod is circular, and two ends of the core rod are provided with ring cuts with the same length; the two ends of the core rod are provided with insulating sleeves matched with the ring cutting. The utility model has the advantages that the strength is high, the stress of the internal pole piece is kept, short circuit or core rod corrosion is avoided, the liquid injection production efficiency of the full-tab battery core is improved, the problem of difficulty in electrolyte infiltration is solved, the infiltration efficiency is high, the assembly difficulty is simplified, the assembly efficiency is improved, and the infiltration effectiveness after liquid injection of the battery core is improved.

The utility model provides a tooth socket and a caries prevention device thereof, which relate to the technical field of tooth sockets, the tooth socket comprises a base material layer, a wrapping layer and a protective layer, the wrapping layer is arranged on the base material layer, and the protective layer is arranged on the wrapping layer. The caries prevention device comprises a fixing block, the fixing block is fixedly installed on the inner wall of the base material layer, a groove is formed in the fixing block, a storage box is installed in the groove, the back of the storage box is communicated with an air bag, and a baffle is installed in the air bag. The protective layer is arranged to protect the wrapping layer, so that the protective layer can prevent the tooth socket from being abraded due to long-term use, and the service life of the tooth socket can be guaranteed; by arranging the storage box, the effect of storing the mouthwash is achieved, and the use convenience of the tooth socket is improved; by arranging the air bag, the effect of discharging the mouthwash in the storage box is achieved, and the effect of preventing decayed teeth of a wearer caused by bacterium breeding is achieved.