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309results about How to "Correction of deformation" patented technology

Analysis method of transmission line wind-ice coupling load line breakage effect

The invention provides an analysis method of a transmission line wind-ice coupling load line breakage effect. The analysis method includes the following steps that 1, geometric parameters and physical parameters of a transmission tower line system are determined, and a transmission tower line system analysis model is established; 2, icing loads of the transmission tower line system are determined; 3, a non-linear analysis method of a transmission tower line system reaction under the effect of the icing loads is established; 4, a wind load model in which the wire icing thickness changes is established; 5, a dynamic analysis method that a transmission wire is broken under the effect of wind-ice coupling loads is established, and the dynamic effect of transmission line icing line breakage is analyzed and calculated. According to the method, the coupling effect of the icing loads and wind loads is considered at the same time, the analysis formula is displayed and expressed, the calculation speed is high, the calculation amount is small, and the defects of existing traditional methods can be effectively overcome. The method is suitable for analysis and calculation of the icing line breakage effect of various transmission tower line systems with different spans and sags under the effect of the ice-wind coupling loads.
Owner:STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +2

Half-subarea-segmentation-method-based digital image correlation method

Provided in the invention is a half-subarea-segmentation-method-based digital image correlation method. The correlation method comprises: a certain number of measurement points are distributed on a picture before deformation, a deformation field, containing two kinds of deformation modes, of a picture after deformation is obtained by using a sub-pixel digital image correlation method, and measuring points with poor results are selected; a square sample subarea is selected by using each measuring point with a poor result as a center, the subarea is segmented into two half subareas by using one line segment crossing the center point of the subarea, an optimum target subarea among all subareas at different segmentation angles is searched by using an overall-pixel digital image correlation method, and rough measurement displacement and a rough segmentation angle are obtained; and with the rough measurement displacement and rough segmentation angle as initial values, measurement displacement and a segmentation angle are searched precisely by using the sub-pixel digital image correlation method and a convex function extreme seeking method. Compared with the traditional digital image correlation method, the provided digital image correlation method enables displacement of measuring points near a boundary of two kinds of deformation modes to be searched and the application range is expanded.
Owner:LIAONING TECHNICAL UNIVERSITY

Manufacturing method for integral wing-body-fused cabin

ActiveCN106002088AQuality assuranceAvoid deformation accumulationAircraft componentsGraphite3d scanning
The invention discloses a manufacturing method for an integral wing-body-fused cabin. The manufacturing method comprises the steps that a wing-body-fused cabin casting is cast and formed based on the graphite type and detected; the wing-body-fused cabin casting is sequentially subjected to machining, datum measuring and the like, a wing body shell blank is formed, and blank 3D scanning detection is conducted; a rough machining datum is machined, and the shell appearance is roughly machined according to the rough machining datum; the shell size of the roughly-machined wing body shell is detected, and the form and location tolerance of the roughly-machined wing body shell is detected through first shape and location 3D scanning; a finish machining datum is machined based on the first shape and location 3D scanning, shell appearance finish machining is conducted on the roughly-machined wing body shell according to the finish machining datum, the shell size of the wing body shell subjected to finish machining is detected, and the form and location tolerance of the wing body shell subjected to finish machining is detected through second shape and location 3D scanning; and skin laser welding and cabin heat treatment are conducted on the wing body shell subjected to finish machining. The manufacturing method effectively solves the technical problem that machining of existing integral wing-body-fused cabin products is hard to control, and accordingly the overall quality of the integral wing-body-fused cabin is guaranteed.
Owner:HUBEI SANJIANG AEROSPACE GRP HONGYANG ELECTROMECHANICAL

Window frame structure design method based on car door sealing fine equivalent model

ActiveCN107045567ASimulation force situationWindow frame improvementGeometric CADDesign optimisation/simulationStraight segmentOptimal design
The invention relates to a window frame structure design method based on a car door sealing fine equivalent model. The method is characterized by comprising the steps that S1, a window frame edge of a car door is segmented into a straight segment and a turning segment, and a compression-displacement curve and stiffness coefficients of all sealing strips are obtained; S2, the car door sealing fine equivalent model is established; S3, compression displacement of equivalent spring units is obtained according to clearance between a car door window frame and a door frame side wall, and the deformation amount of the window frame is obtained based on stiffness coefficients of all the equivalent spring units and the corresponding compression displacement; and S4, an optimal stiffness value and an optimal pre-bending amount value of the window frame are obtained according to the deformation amount of the window frame. Compared with the prior art, smaller stiffness meeting a sealing requirement can be obtained, redundant stiffness obtained through a concentrated load method can be remarkably compressed, a more reliable reference can be provided for design of the car window pre-bending amount including a sealing fine reaction, and light minimum car door stiffness optimal design is supported.
Owner:TONGJI UNIV

Construction method for deformation control over existing operation tunnel crossing under shield

The invention discloses a construction method for deformation control over an existing operation tunnel crossing under a shield. A construction tunnel is a shield tunnel of an under-crossing existing operation tunnel. A tunnel segment of the under-crossing existing operation tunnel is an under-crossing segment. The process of constructing the under-crossing segment comprises following steps: 1, reinforcing a steel ring of the operation tunnel; 2, laying distortion monitoring points of the existing operation tunnel; 3, determining reference values of guiding construction parameters based on shield construction of a test section; 4, determining parameters for guiding construction of the under-crossing segment: determining parameters for guiding construction of the under-crossing segment based on reference values of guiding construction parameters; 5, carrying out shield construction of the under-crossing segment; 6, after under-crossing construction, supplementing and grouting in phases: supplementing and grouting the under-crossing segment based on a monitoring result and by means of grouting holes in shield tunnel segments.The construction method for deformation control over the existing operation tunnel crossing under the shield has following beneficial effects: the construction method has simple processes and is reasonably designed; construction is performed easily and conveniently; a fine construction effect is obtained; and effective control over distortion of the existing operation tunnel crossing under the shield is achieved in a short period at low cost.
Owner:CHINA RAILWAY FIRST GRP CO LTD +1

Method for monitoring and positioning concrete cracks by using elastic conducting film sensor and infrared thermal imaging technique

The invention discloses a method for monitoring and positioning concrete cracks by using an elastic conducting film sensor and an infrared thermal imaging technique, comprising the following steps: 1)solidifying conductive coatings to form an elastic conducting film, laying the elastic conducting film on a concrete member and arranging leads at two ends of the elastic conducting film to form theelastic conducting film sensor; 2) when discovering cracks on the concrete member or carrying out routine inspection, connecting the leads at two ends of the elastic conducting film to a power supplyto be electrified to generate heat; 3) carrying out scan detection by using an infrared thermal imaging device; and 4) accurately determining the positions, quantity, trends, sizes and other information of the cracks according to the images obtained after scan detection by the infrared thermal imaging device. By the method, the resistivity of the elastic conducting film sensor on the positions ofthe cracks is increased, and the heat output on the positions of the cracks after electrifying is more than that on the common positions. The positions, quantity, trends, sizes and other information of the cracks can be accurately displayed by adopting the infrared thermal imaging device for scanning.
Owner:邓安仲

Novel probe used for pelvic floor muscle rehabilitation therapy apparatus and using method thereof

The invention discloses a novel probe used for pelvic floor muscle rehabilitation therapy apparatus. The novel probe comprises a carrier, two oval conductive pasting films, two elastic components, two pressure sensors, a pair of wires which are connected to the tail portions of the pasting films and used for receiving electrical stimulation and sending electromyographic signals and a pair of wires connected to the pressure sensors and used for transmitting pressure signals out of a human body, wherein the carrier is a cylinder made of electrical insulating materials in an injection molding mode, the section, perpendicular to the axis, of the carrier is an oval, and one end of the carrier is smooth and suitable for being arranged in a cavity; the two oval conductive pasting films are located at the two ends of the long axis of the oval section of the carrier and are soft and slack, and the edges of the two oval conductive pasting films are connected to the carrier in a seamless mode; the two elastic components are located in the carrier and connected with the middles of the pasting films; the two pressure sensors are located in the carrier and connected with the elastic components. The novel probe enables the rehabilitation therapy apparatus to carry out electrical stimulation on the pelvic floor muscle through the conductive pasting films and transmit out the collected electromyographic signals; meanwhile, the muscle will generate pressure on the elastic components through the pasting films along with contraction of the pelvic floor muscle, so that the elastic components deform, and the pressure sensors can transmit the pressure signals out of the human body.
Owner:SHANGHAI JIAO TONG UNIV
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