... environmental statistics and response calculation. In principle, lifetime extreme response must be found from long-term statistics of the response parameter of concern. It is, however, quite laborious to establish this kind of probability distributions, which means that rational short-cuts need to be taken...

... of the sea state which retains information about the amplitude, phase and direction can then be used to calculate the resulting non-'linear drift forces by means of known quadratic transfer functions. It is shown how, with certain limitations, the wave and drift force calculation can be implemented in real...

... for pipeline steels IS Introduced which allows the calculation of stresses and strains for significant design cases to be accomplished in a rational manner The procedures suggested should allow the question of the acceptability of current stress limits to be explored further INTRODUCTION The design...

... ABSTRACT Sample calculations illustrate uncertainties in predicting second-order wave forces and low-frequency motions of a large moored structure. The results, for a "deep-draught floater" in regular and irregular waves, demonstrate sensitivity to numerical modelling procedures...

... 1 Abstract This paper presents two simple and efficient frequency domain methods for the calculation of the dynamic tension of Single and multiple segment mooring lines The first method described (MODEL 1) IS an analytical approach based on the catenary equations and an estimate of the line...

... vortex shedding problems. STATFJORD-A VIBRATIONS At Statfjord A the vibration was an overall vibration of the tie, see figure 1. Calculations of the natural frequency of the individual panel sections of the main chord showed that it was close to the recorded frequency and to the vortex shedding...

... temperature calculation foundation ice building ice structure intensity ice strength granulated ice strength variation spray cone method cross-section experimental result show upstream oil & gas variation interaction strength equation adhesion structure building P, oceedmgs ofthe...

... ABSTRACT This paper presents the description of a higherorder boundary element method (HOBEM) for calculating linear hydrodynamic loadings on large floating bodies and comparison with constant panel methods and HOB EMs that are employed in conjunction with the hybrid boundary integral equation...

... structure resistance concrete material stress range calculation truss fatigue loading structural steel reinforcement steel deck structure compression stress sn curve criteria transverse truss shaft upstream oil & gas platform fulfill fatigue life Proceedmgs of the Fllst (1990) EUI...

... ABSTRACT This paper presents a probability distribution of stress ranges and a spectral fatigue damage calculation of offshore structures subjected to non-narrow banded Gaussian stress processes. The stress range probability distribution is empirically formulated on the base of a number...

... calculations a simplified spreading function being convenient for structural response calculation is recommended. INTRODUCTION To the first order the wavy sea surface is conveniently modeled as a Gaussian stochastic process. For short time periods and limited spatial areas, the process can furthermore...

... of the pipe Wellstream has developed a family of simple and accurate methods for calculating static failure and stiffness properties of flexible pipes. Degradation of risers may result from wear of the tensile armor wires as a result of slip during flexure. Wellstream has derived a formula for the magnitude...

... ABSTRACT This paper presents an outline of a comprehensive program system developed by the authors, which includes many functions for response analysis of a wide variety of offshore structures. Typical calculated results by this system are also presented being compared with field measurements...

... on the global resistance on the basis of the true local stresses. 1. INTRODUCTION The buckling calculation of a conductor involves certain problems which are not involved in the calculation of an ordinary beam-column. There are problems both with regard to the load and with regard to the resistance, even...