The calculated first-order response function of motions,motion spectrums and statistical values of surge,heave and pitch motions were compared with the corresponding ones in model test.
By programming software, surge and heave response and the velocity of TLP motion were presented, it can be seen that the motion response of TLP could be predicted precisely.
Through analysis to the surge response, we can find that when the frequency of the incident wave is too low to the inhered surge frequency of TLP, very big displacement will take place.
The nucleation of the new phase is treated as a fluctuation "surge" in the system.
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An additional surge of the amplitude and a double change of the phase in it occur between anodic zeros.
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The compound phase curves of brightness of the satellites in the spectral bands at 0.25, 0.41, 0.48, 0.56, 0.75, 0.91, 1.4, and 1.8 μm, which include a pronounced opposition surge and linear part, were constructed.
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Surge variations in water level in the Danube mouth
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The regularities of surge-induced water level variations in the Danube mouth are considered.
The design of the stable cross-sectional area of a surge tank in the past was based upon Thoma's formula,which had been derived on the assumption of ideal regulation. The area calculated often tended to be larger than actually required, resulting in not only increase of project investment but also retardation of building speed. This paper considers the various influencing factors of stability, establishes a mathematic model of water power station with true regulation system, and derives a more complet...
When the waterway of a hydroelectric station is rather long,the expensive structures of surge chamber are usually required. If it is desired to avoid the use of surge chamber,not only the problem of the higher water hammer pressure but also that of the stability and quality of governing must be solved. In this paper,the control differential equations of governing are given out first,then the critical condition of stability under small oscillation and the method to detrmine the transient process ...
Calculations are carried out for the governing stability-limit curves concerning four hydroelectric plants, with and without a surge tank. The characteristics of the water turbines are considered.Conditions are made to vary by taking the turbines real and ideal, the load self-regulation coefficients equal to one and zero,and the criteria for stability of high and low orders. The factors of the conduit head-loss and the permanent speed droop are allowed for.Explicit algebraic equations for the calculat...