Abstract
A practical mathematical model capable of predicting the dynamic strains in a finite length straight pipe subject to waterhammer has been investigated. The membrane shell theory neglecting the radial inertial force is employed and calculated numerically by the "two step Lax-Wendroff method" after having transformed its displacement equations of motion into equations of conservation form on strain and particle velocity. An experimental equations of motion into equations of conservation form on strain and particle velocity. An experimental investigation is carried out for the two oil-filled straight pipes whose boundary conditions are open-fixed / closed-fixed and open-fixed / closed-free, and pressure fluctuations and axial and circumferential dynamic strains are measured. The free, and pressure fluctuations and axial and circumferential dynamic strains are measured. The experimental and analytical results are discussed in detail, then the present mathematical model and calculative method are found to be sufficiently appropriate to evaluate the dynamic response of the pipe wall.
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