Responses of the dynamical systems are highly affected by the natural frequencies and it has a huge impact on design and operation of high-rise and high-speed elevators. In the present paper, the variational iteration method (VIM) is employed to investigate better understanding the dynamics of elevator cable as a single-degree-of-freedom (SDOF) swing system. Comparisons made among the results o...

Distributed sensing systems can transform an optical fiber cable into an array of sensors, allowing users to detect and monitor multiple physical parameters such as temperature, vibration and strain with fine spatial and temporal resolution over a long distance. Fiber-optic distributed acoustic sensing (DAS) and distributed temperature sensing (DTS) systems have been developed for various appli...

the vibration of cable-stayed bridges subjected to the passage of high-speed trains is studied in this article. the moving train includes a number of wagons, each of which is modeled as a four-axle system possessing 48 degrees of freedom. the car model is nonlinear and three-dimensional and includes nonlinear springs and dampers of primary and secondary suspensions, dry friction between differe...

Abstract The parameters optimization of a viscous damper is carried out with cable-stayed bridge single cable plane and tower. Based on five four functions energy dissipation structure, the relationship between each function obtained. Finally, spatial distribution surface multi-parameter objective constructed, final result process shows that reasonable can effectively inhibit vibration structur...

Abstract The stay cables are axial load-carrying members in cable-stayed bridges and subjected to the problems of large amplitude oscillations mainly due wind. investigations presented this paper attempt tackle problem by application a shape memory alloy wire, which understood have excellent recovery property under deformation. aim is determine how dynamic behavior taut steel cable changes when...

Oscillators operating in field applications are subject to much more strenuous environmental effects than those in the laboratory. These environmental effects, such as vibration and temperature fluctuation, have a great impact on the performance of the oscillators; however, many applications require this laboratory-level performance in situ. Opto-electronic oscillators (OEOs) have emerged in re...

cable driven parallel manipulator (cdpm) is a special class of parallel manipulator in which the rigid extensible links are replaced by actuated cables. it is necessary to take into consideration the cable dynamics, i.e.; its mass, flexibility and curved shape for manipulating a long-span cdpm. these terms complicate governing equation of motion in a way that special tactic are applied for simu...