The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
By setting cables and struts in place in the single-layer cylindrical latticed shell, a new-style prestressed spatial steel structure-cable supported barrel vault structure is constructed, obviously, the cable is the most important element in this structure. The static load test research on this structure is carried out and the mechanics feature of cables are mainly investigated. Based on the prototype...
The desulphurizing tower used in the power plant is the key environmental protection facility to eliminate the air pollution. Multiple cutouts are opened on the tower wall because of the technology requirement. The presence of multiple cutouts will influence the stability of tower under wind loading. On the project background of the large-scale thin-walled cylindrical shells of a practical desulphurizing...
Sample database was established and the mapping relationship between span,rise-span ratios and type of shell with minimum weight was simulated by using BP neural network method. The selected typical samples were chosen from hundreds of sectional optimized results based on sequential two-level algorithm from five typical types of reticulated domes. This paper provides a simple lectotype optimization...
Sample database was established and the mapping relationship between span,rise-span ratios and type of shell with minimum weight was simulated by using BP neural network method. The selected typical samples were chosen from hundreds of sectional optimized results based on sequential two-level algorithm from five typical types of reticulated domes. This paper provides a simple lectotype optimization...
From five classic types of reticulated domes, selected models with minimum weight were chosen from the sectional optimization results of hundreds of shell computing model with different size. Building up the mapping relationship between span,rise-span ratios and type of shell with minimum weight by using the method of Intelligent two-level Algorithm, provides an easy and cleverly way to accomplish...
Due to their high corrosion and chemical resistance, glass fiber reinforced plastic (GFRP) materials are increasingly being used in the construction of industrial chimneys. The design of a chimney is governed by dead loads, wind loads, thermal loads and seismic loads. In this paper, the finite element model of a 60m high FRP chimney with complex connections is established using finite element software...
Based on Component Mode Synthesis method, the vehicle-bridge interaction problem of a concrete-filled steel tubular tied-arch bridge was analyzed. The mathematical model assumed a finite element representation of the bridge together with beam, shell, and link elements. And the vehicle simulation employed a three dimensional linear vehicle model with seven independent degrees of freedom. A well-known...
The pressure of servo-hydraulic cylinders and the position of their pistons are measured in servo-hydraulic oscillation systems on the slab continuous casters. They are substituted in the motion equation of servo-hydraulic oscillation systems to determine the frictional force between the mould and slab shell. The change characteristics of frictional force are found, which were before the molten steel...
The link suspension system has been used to install a BOF vessel shell in the trunnion ring and has been adopted widely in many steelmaking workshops all over the world. This system is a key component of the oxygen steelmaking process and combines the advantages of well-proven suspension systems with the design philosophy of static determinacy in any operating condition and status of deformation....
The AxeBot robot's mechanical design, a fully autonomous mobile robot, for the RoboCup Small Size League, is presented in this paper. The AxeBot robot uses three omnidirectional wheels for movement and is equipped by a shooting device for shooting the ball in different directions. Once the AxeBot robot is a fully autonomous mobile robot all the sensors, engines, servos, batteries, and the computer...
It is very important that researching the rule between the burst-effect of PELE and impact velocity and target thickness, especially for deeply searching the mechanism of PELE and enhancing it's damage efficiency. In this experiment, 35 GrMnSiA and nylon were respectively adopted as the shell and the core of PELE for the first time, the projectiles vertically impacted armor plates range from 5 mm...
A netlike spherical shell was proposed to replace the traditional smooth spherical shell of the spherical mobile robot in order to widen the practical application scope and to prolong the using life. First the mechanical property of the netlike shell was compared with that of the traditional smooth shell. Then, the kinematic and dynamic models of the spherical mobile robot with a netlike spherical...
The plastic buckling calculation of the centrifugal concreted-filled steel tubes under torsion was derived from the cylindrical shells with spiral stiffeners analogy. In applying the analogy, it is assumed that under torsion, concrete compression parts between the diagonal cracks work as spiral stiffeners of steel shells, based on the plastic performance and mechanism of the tubes under experiment...
In this paper, a 3-dimensional mathematical model has been developed for the thermo-mechanical coupled analysis of the solidification process of carbon steel in funnelshaped mold using thermo-elastic-plastic finite element method (FEM). The major application of the model is to perform computations of temperature, stress and longitudinal cracking index (LCI) variations in shell. The effects of casting...
The exchangers on the top of tower exposed to wash erosion seriously when Shengli refinery processed Middle-east crude oil. Used grey system theory, aimed at general tube-shell exchangers and helix-baffled structure, tube of 20 carbon steel with TH847 coating, 20 steel aluminizing, 316L and dual phase steel, carried on grey decision. For exchangers rebuilding project, grey target decision shows that...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.