Bulletin of the Society of Naval Architects of Korea (대한조선학회지)
- Volume 24 Issue 4
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- Pages.9-18
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- 1987
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- 1225-1178(pISSN)
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- 2765-2858(eISSN)
Linear Time Domain Analysis of Radiation Problems
시간영역법에 의한 강제동요시 동유체력 해석
Abstract
The hydrodynamic radiation forces acting on a ship travelling in waves have been conventionally treated by strip theories or by direct three dimensional approaches, most of which have been formulated in frequency domain. If the forward speed of a ship varies with time, or if its path is not a straight line, conventional frequency domain analysis can no more be used, and for these cases time domain analysis may be used. In this paper, formulations are made in time domain with applications to some problems the results of which are known in frequency domain. And the results of both domains are compared to show the characteristics and validity of time domain solutions. The radiation forces acting on a three dimensional body within the framework of a linear theory. If the linearity of entire system is assumed, radiation forces due to arbitrary ship motions can be expressed by the convolution integral of the arbitrary motion velocity and the so called impulse response function. Numerical calculations are done for some bodies of simple shapes and Series-60[
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