Dynamic Analysis of Beams

This app performs dynamic analysis of continuous beams, including eigenvalue (modal) analysis and time-history analysis of a moving vehicle load. It reports modal parameters (natural frequencies and mode shapes) along with static and dynamic force effects (moment, shear, and reactions), deflections, and dynamic amplification factors. The app supports multiple spans, variable linear and concentrated loads, and custom vehicle configurations traveling at variable speed. Features SI and US Customary units.

Span # Lengthft Moment of inertia Iin⁴ Delete
1

Uniform weight over entire beam

kip/ft

Linear Loads

x1ft x2ft q1kip/ft q2kip/ft Delete

Point Loads

xft Pkip Delete

Rolling Vehicle

Axle Spacingft Loadkip Delete
Modal Analysis
Moving-Load Time History
Static Analysis
USSI
x = 0.00 ft  |  δ/δmax = 0.000
—
t = 0.000 s
x = 0.000 ft
Section x x = 0.00 ft