Buckypaper is a thin sheet fabricated from the aggregation of carbon nanotubes. The generally accepted method for forming such carbon nanotube (CNT)¯lms involves the use of stable suspension of carbon nanotubes in water. These suspensions can then be membrane-¯ltered under pressure to yield uniform¯lms. After preparation of a stable solution, it should be membrane-¯ltrated on the surface of a¯lter. Usually, the quality of a buckypaper depends on sonication time and power, surfactant type and concentration,¯lter type, and concentration of carbon nanotube. In order to investigate the surface quality of buckypapers, low-magni¯cation images could give rather useful information about the roughness of surface. Analysis of the 100Â images clearly shows that with increasing the suspension concentration, the smoothness of buckypaper surface will decrease. Therefore, from this viewpoint, decreasing the concentration can enhance the quality of the buckypaper. Surface of the¯lter also a®ects on the buckypaper quality. Therefore, for¯ltration of the suspension, a¯lter with suitable material, pore sizes, and surface should be used. As the pore sizes of the¯lter are usually small, the¯ltration process may be very time-consuming. Since the process is carring out under pressure and also due to the brittle nature of the buckypaper, removal of the buckypaper from the surface of the¯lter is a very serious and important stage and depends on the¯lter type, concentration, and type of CNTs. The buckypaper usually can be removed from the¯lter mechanically. The type of CNTs (MWNT or SWNT) may change the above-mentioned factors.
In this paper deriving of dynamical model of the load-bearing structure in form of a Trusses of the excavator with rotor is elaborated. Finite Element Methods and real working conditions are used to derive the dynamical model and to perform the local linearization of the dynamic elastic line for the structure of the load-bearing of the excavator with rotor. As carriers with continuous masses were treated the upper bearing structure of the Dynamical model and the truss levels. Finally, in accordance with the requirements of the problem, the degrees of freedom and the reference nodes are selected. The second stage of reduction, represents the final formation of the dynamical model of the load-bearing infrastructure, which however must be more accurate during the dynamic behaviour of the excavator with the rotor. The exposed work with the formation of the dynamic model of the Truss bearing structure, enables the concrete solution of the oscillations of the excavator with rotor. In addition, the model is of a universal character, respectively, can also be used during the formation of the dynamical model of truss carriers in general.
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.