[en] The relationship between stiffness and sizes of the foundation arises much trouble to the designer because of the conflicting solution they require. The dynamic behavior studies of the foundations show the interest of the low fundamental frequency foundation. However, classical solutions, valuable for 3000rev/mn running speed machineries, are not suitable for large 1500 rev/mn running speed turbo-generator of nuclear power plants. A new design chosen by Electricite de France is dealt with

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[en] The work contains an analysis of large amplitude vibrations of non-uniform skew plates with variable thickness for different values of aspect ratio, skew angle and taper constant. The relative time periods for linear and non-linear vibrations have been studied and the results have been presented in the form of tables. The static deflections of the mechanical system considered have also been obtained as a by-product of the present solution. The analysis is based on Berger's approximation that certain terms can be neglected from the strain energy expression without introducing any appreciable error. Choosing the deflection function compatible with the boundary conditions Galerkin procedure has been applied to obtain the time differential equation for an unknown time function. This equation is then solved explicitly in terms of Jacobian elliptic function of the cosine type. (orig./HP)

[en] The invention relates to an apparatus for submitting n (n>=1) test specimens of a given material to alternate tensile and compressive stresses. The apparatus comprises an excitation source whose displacement axis is horizontal, a guiding stem an extremity of which is rigidly connected to said exciter and the other extremity of which is provided with n means for fixing an extremity of each of the n test specimens. Said stem is guided in such way that it can move in free translation along a horizontal axis. This apparatus also comprises a bulk part provided with n horizontal bearings, and nozzles for injecting a pressurized gas, so that these n bearings constitute gas bearings intended for n cylindrical masses each with a horizontal axis. Said masses are provided, on their side facing said stem, with a fixation means of the other extremity of one of the n test specimens

[en] This is an attempt to document some of the measurements and analysis relating to the modulation of the spill due to the vibration of the magnets in the new C0 area. Not all of the relevant graphs were saved at the time, however an attempt was made to show representative illustrations albeit not in the proper chronological order

[en] This paper discusses about the analysis on the centre of gravity (C.O.G) in affecting the input reference of the motion control of the extendable double-link of two-wheeled mobile robot. The proposed system mimics double inverted pendulum, where the angular position of the first link (Link1) is to be varied depends on the value of the angular position of the second link (Link2) and the elongation of the extendable-link (Link3) that is attached to Link2 with different payload. The two-wheeled mobile robot together with the extendable link on Link2 makes that system become more flexible but yet, the system has become more unstable. The inclination of extendable link at any interest angle will affect the C.O.G of the system especially when the payload is having a significant weight. This two-wheeled mobile robot can be balanced on the condition that the system's center of gravity must be located on the centre of the wheels. Therefore the input reference of Link1 will be determined from the C.O.G analysis of the system with the payload. Preliminary results show that the angular position of Link1 can be set at suitable degree based on C.O.G analysis that is used for motion control

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