Abstract
Coupled fluid-structure is significant in many aspects of engineering applications such as aerospace fuel tanks, the seismic safety of storage tanks and tuned liquid dampers. Numerical investigation of the effects of thin plate cover over a cylindrical rigid fuel tank filled by an inviscid, irrotational, and incompressible fluid is investigated. Governing equations of fluid motion coupled by plate vibration are solved analytically. A parameter study on the natural frequency of coupled fluid-structure interaction is performed. The results show the non-dimensional natural frequency of coupled fluid-structure is a function of mass ratio, plate elasticity number and aspect ratio. This function is derived numerically for high aspect ratios which in companion with a semi-analytical could be used in the engineering design of liquid tanks with a cover plate.
Highlights
IntroductionThe storage tanks usually built from strong materials such as steels (for drums), stainless steels, concrete, aluminum alloys, fiber-reinforced plastics (for fiber drum), and Timber which can bear large elastic vibrational energy
The coupling problem of structure and fluid interaction is a classic problem interested in various engineering applications such as vehicle dynamics, aircraft dynamics, and storage tanks [1,2,3,4,5].The storage tanks usually built from strong materials such as steels, stainless steels, concrete, aluminum alloys, fiber-reinforced plastics, and Timber which can bear large elastic vibrational energy
The analytical solutions which are obtained in the previous section, are investigated numerically for the practical case
Summary
The storage tanks usually built from strong materials such as steels (for drums), stainless steels, concrete, aluminum alloys, fiber-reinforced plastics (for fiber drum), and Timber which can bear large elastic vibrational energy. These tanks are exposed to dead and live loads such as snow, wind (vortex oscillation), seismic, buckling, and earth pressures. When the structure is assumed to have the many mass vibration system, modal analysis is a useful tool for the design of yield shear force of the convective mass vibration, damage to the structure (cumulative plastic strain energy), and water pressure imposed on the tank. That analysis needs the natural frequency of the maximum number of vibration modes that influence seismic responses. One of the first analytical methods proposed to solve that problem is the Rayleigh–Ritz method [6]
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