... to vortex Induced vibratlon requlres to be considered In the absence of any quantitative measurements, span assessment requlres to be made on the basls of conservative assumptions regarding such unknowns as span length, end fuclty, axial tension etc Careful analysis of the vibratlon signature glves...

... estlmate tenslon frequency span span length current veloclty frequency measurement natural frequency conservatlve assumptlon condltlon natural frequencle peak stress murray development engineering international ltd span frequency measurement free span PIPELINE FREESPAN...