Computer animation of structural mode shapes

In the existing post-processing procedures, the graphical parameters, such as view angle, position of the projection plane, ..., etc., cannot be changed arbitrarily at any time when the animation of the structural mode shapes is in progressing. Therefore, it is difficult to observe the detail of the structural mode shapes on the computer screen. To solve the above-mentioned problem, some computer programs and a graphical user interface are developed, based on the free vibration theory and the computer graphical theory, for providing an interactive way between the users and the computer. By using the last computer programs, the real-time animation of structural mode shapes with arbitrary graphical parameters can be easily observed at any time. Because the vibration amplitudes and frequencies for structural mode shapes are adjustable in the developed computer programs, the detail of any part of any structural mode shape can be easily observed from the computer screen no matter whether the vibration amplitudes and frequencies are very small or very large.