We consider an axi-symmetric flexible rotor perturbed by dissipative, conservative, and non-conservative positional forces originated at the contact with the anisotropic stator. The Campbell diagram of the unperturbed system is a mesh-like structure in the frequency-speed plane with double eigenfrequencies at the nodes. The diagram is convenient for the analysis of the traveling waves in the ro...

We consider an axi-symmetric rotor perturbed by dissipative, conservative, and non-conservative positional forces originated at the contact with the anisotropic stator. The Campbell diagram of the unperturbed system is a mesh-like structure in the frequency-speed plane with double eigenfrequencies at the nodes. The diagram is convenient for the analysis of the traveling waves in the rotating el...

With the rapid development of urbanization, speed constructing urban underground space and ground foundation engineering is accelerated. shortage land resources, distance between surface getting closer closer, contradictions problems projects are becoming more serious. Based on new subway station, this paper passes existing viaduct in a short distance. The settlement deformation pile buildings ...

The primary objective of this investigative work was to determine among the ISICs analyzed – furniture removal services (H4923.04) and construction bridges viaducts (F4210.32), both which maintain good operation management ISIC that has better economic than other. Bibliographic materials calculations were studied, a quantitative approach based on deductive scheme applied. Data using Microsoft E...