Abstract

In dynamic and quasistatic positions the problem on nonstationary deformation of extended thin-wall construction discreetly elastically attached to the rigid surface is approximately solved under live load. The properties of the heat-insulating shield are included in the equation of flexural vibrations of the beam through inertia forces. Local damage is described using generalized functions. The movable load is simulated by an infinite uniformly distributed normal force per unit length moving along the beam at a constant speed. Consequently, the inertial forces have a more complex structure than in the classical presentation. The problem is limited to the differential equation of flexural vibrations of the beam in partial derivatives. The speed of the load is included in the equation as a parameter. For the solution, the Bubnov method is used, in accordance with which the beam deflection is represented as a series of given coordinate functions with unknown coefficients, which are considered as generalized coordinates. The possibility of decreasing framed structures maximum acceleration values in set points of aerospace systems under the action of different static and dynamic loads is investigated with the methods of computing experiment. Critical speed of load movement is calculated.

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