The analysis of free vibration of hydropower house by means of two methods are deformation of inclination Angle and slope deflection.

Results show that the effect of projection noise on the reconstructed fields is represented by a slope function related to the filter used in deflection tomographic filtered back-projection algorithm.

By using the moment-curvature relationships of the member section, the inelastic element stiffness matrix is derived directly from the slope-deflection equation of clastic member.