Truck-mounted concrete pumps have been adopted in many construction projects. However, the investigations about the automatization or robotization of distribution boom system of the truck-mounted concrete pump are very scattered. In this study, a scheme of automatic concrete spray of the distribution boom system of the truck-mounted concrete pump has been presented and discussed. The concrete spray process and the kinematics of the boom sections were analyzed including its inverse kinematics problem. Transient dynamic analysis was performed to validate the effect of the new control system on the boom system base on the flexible body co-simulation among ANSYS software, ADAMS software and Matlab/Simulink software. A three-dimensional simulation was programmed to imitate the process of automatic spray and verify the control algorithm. The simulation result shows that the system can pour concrete on a long narrow area automatically thereby satisfying, and the trajectory movement of boom mechanism.
Tibetan area is the most active continental collision zone on earth. Several major earthquakes occurred around the boundaries of Tibetan plateau and caused massive damages and casualties.The dynamics of this area is not well understood due to the complex structure of Tibet and its surrounding area. In this study, a 3D global flow simulation with only viscous rheology is applied to studying the stress distribution in this area, and the interaction between Tibet and its surrounding areas is investigated. Finally, the possibility of combining regional modeling with global models is also discussed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.