Abstract:The 500 m spherical Radio telescope (five hundred meters aperture spherical telescope) of the National Astronomical Observatory is one of the major scientific devices planned to be built in the 11th Five Year Plan. Its cable net has a installation span of 500 m, a clear height of about 130 m, and a total of 8895 cables. FAST cable network has a large span and a large amount of cables, requiring high accuracy, making cable network construction very cumbersome and complex. The V-zone anchoring platform provides a movable anchoring platform for FAST cable network construction, and is an essential key equipment during the cable network construction process. This article focuses on the requirements of FAST cable network construction for V-zone anchoring platform, and uses ANSYS finite element software to solve multiple problems in the structural design process of V-zone anchoring platform through advanced structural optimization design and suspension cable shape finding methods; Innovatively solved the problem of anchoring and moving the V-zone anchoring platform; Finally, the development of the V-zone anchoring platform was successfully completed, providing strong support for FAST cable network construction

Abstract:Monitoring the health status of dams is a necessary means to ensure their safe operation. This article analyzes the health status of the dam and designs a dam health monitoring system based on sensor networks, targeting the characteristics of the dam. This paper mainly expounds the overall structure of the system, the equipment and methods of Deformation monitoring, seepage monitoring, stress monitoring and software system, and discusses in detail the layout of measuring points, testing equipment, testing methods and principles

Abstract:s a key technology of intelligent robots, visual sensors can achieve robot positioning, navigation, and target tracking. However, there is a lack of high-performance robot vision sensor platforms in the current market. This article will introduce a powerful and efficient visual sensing platform called Guidance, which includes a central processing unit and multiple (five or more) servo sensing units. The built-in basic functions include visual positioning, obstacle avoidance, and depth of field image generation. In addition, Guidance comes with a complete SDK document that allows users to flexibly use and develop related projects, such as autonomous navigation, target tracking, positioning, and map building

Abstract:The FAST cable net structure of the National Astronomical Observatory is the support and angle adjustment mechanism of the whole system. It has been under the action of reciprocating loads with variable amplitude and unequal stress levels during the working phase. The stress relaxation, deformation and fatigue of the cable will affect the entire FAST structure. The redistribution of cable force and the change of Morphogenesis of the reflector will affect the overall stability of FAST. Especially in the years after completion, its changes are more significant. Therefore, the National Astronomical Observatory project has put forward very high technical requirements for cable network construction. According to the strict technical standards for cable network construction, a 500MPa ultra high stress amplitude cable has been developed, and high-precision cables and node plates have been manufactured using new processes. The construction process of "1/5 rotational symmetry, large-span cable net high-altitude loose assembly" was proposed on site, and the cable net installation work was successfully completed

Abstract:This paper mainly introduces the design and application of a flexible cableway anchorage system that can provide anchorage points for the anchorage device (V-shaped anchorage platform) and enable the anchorage device to slide freely to any position within its own alignment during the erection of the main supporting structure of the FAST active reflector of the Radio telescope at Guizhou Observatory. The flexible cableway anchoring system is an aerial cableway that connects the bottom of the cable network and the ring beam in the cable network installation project. It is used to provide the anchoring points of the V-shaped anchoring platform at different segments during the cable network installation process. The system consists of four steel wire rope cableways, with the upper end anchored in the form of a hoop fixed to the chord of the ring beam, and the lower end fixed to an independent tower at the bottom of the cable network in the form of a pin with an adjustment device. During the construction process, the flexible track anchoring system cable line shape can be adjusted to ensure that the V-shaped anchoring platform is in the optimal hanging position

Abstract:The arch bridges built around the 1990s, due to the fact that most of the suspension rods of the arch bridges were manufactured and installed on the construction site during construction, have problems such as small embedded pipe sizes and varying degrees of anti-corrosion in structural design. Therefore, many arch bridges need to replace the suspension rods after 5-10 years. However, due to high navigation requirements, some special bridges need to limit the height of the beam bottom, and the existing anchor sleeves of the cables are too long to meet the requirements. This article focuses on the above issues and optimizes the length and extrusion force of the anchorage section of the extruded cable. It is concluded that the cable can meet the requirements of anchorage efficiency when the anchorage length of the extruded anchor sleeve is optimized to 67% of the original length and the expansion taper is 4 °. And the effectiveness and feasibility of this plan have been demonstrated through experiments

Abstract:With the development of technology and the needs of society, the reinforcement technology of prestressed carbon fiber sheets has been increasingly widely used. The reinforcement support is an important component of connecting reinforcement components and prestressed carbon fiber board anchors, and its excellent performance will directly affect the tensioning effect and structural safety of prestressed carbon fiber board. This article uses the finite element analysis software ANSYS to simulate real components, preliminarily analyze the stress situation of the components, and optimize the design of the reinforcement support. It is verified through relevant experiments and has achieved good results in practical engineering applications