Vibration & Dynamics

Seismic Dynamics Simulators

A focused Vibration & Dynamics hub for seismic dynamics tools, keeping related formulas, assumptions, and engineering checks together.

9 simulators

Adjacent categories

Structural Analysis Mechanical Engineering Acoustics Controls & Robotics

Simulator list

Base Isolation Period Shift Simulator
Seismic Dynamics
Compare response spectrum, isolator displacement, and base-shear reduction to see how period shift and damping work together.
Response Spectrum Simulator — SDOF Seismic Design Response
Seismic Dynamics
Real-time IBC design response spectrum. Vary period $T$, damping $\\zeta$, PGA and site factor to read $S_{DS}$, $S_{D1}$, transition period $T_S$ and current $S_a$.
Random Vibration Analysis Tool (PSD Input)
Seismic Dynamics
Analyze SDOF random vibration response in real time. Compute response spectrum, RMS, and 3-sigma values from your input PSD with adjustable 3-segment profiles.
Seismic Design Simulator — Response Spectrum & Story Shear
Seismic Dynamics
Real-time seismic design simulator: compute base shear, period, and story drift. Adjust building stories and site class for instant analysis.
Seismic Hazard Response Spectrum Calculator — Sa(T) & Base Shear
Seismic Dynamics
Set building natural period, soil type, and regional seismic coefficient to calculate design response spectrum Sa(T) and base shear force V in real time. Visualize groun…
Seismic Isolation Analysis Tool — Natural Period, Displacement & Response Spectrum
Seismic Dynamics
Adjust building mass, isolator stiffness, damping ratio and soil type to instantly compute natural period, peak Sa, isolator displacement and acceleration reduction vs f…
Seismic Response Spectrum (Sa/Sv/Sd) Simulator
Seismic Dynamics
The response spectrum is the core tool of earthquake-resistant design: for a structure with period T and damping zeta, it gives the maximum acceleration Sa(T), pseudo-ve…
Seismic Response Spectrum Calculator
Seismic Dynamics
Interactively compute design response spectra (Japan Building Code / ASCE/SEI 7 simplified model) and SDOF seismic response. Visualize Sa, Sv, Sd spectra in real time.
Shock Response Spectrum Simulator
Seismic Dynamics
Numerically integrate the response of a single-degree-of-freedom (SDOF) system to a half-sine shock pulse.

How to Use

  1. Select earthquake ground motion profile (PGA 0.2–0.8 g) and soil classification (A–F per ASCE 7)
  2. Input structure parameters: building height, fundamental period (T), damping ratio (ζ), and material (concrete/steel)
  3. Run dynamic time-history or response spectrum analysis to obtain story shears, base moments, and interstory drifts
  4. Compare computed demands against code limits (typically 2–3% drift for life safety)

Worked Example

Five-story reinforced concrete building: height 18 m, T = 0.72 s, ζ = 5%, located on Site Class D soil. Design earthquake: PGA = 0.4 g, spectral acceleration Sa(T) = 0.95 g. Dynamic analysis yields base shear V = 2,100 kN, maximum interstory drift = 1.8%, peak floor acceleration = 0.68 g. Roof displacement reaches 85 mm. Demands fall within acceptable bounds for ordinary moment frames.

Practical Notes

  1. Use response spectrum method for rapid preliminary design; reserve time-history analysis for irregular or critical facilities
  2. P-delta effects become significant when interstory drift exceeds 1.5%; toggle P-delta amplification in nonlinear solver
  3. Damping values vary: welded steel 2–3%, bolted steel 3–5%, reinforced concrete 5–7%; underestimating damping increases computed demand by 20–40%
  4. Soil-structure interaction (SSI) reduces effective PGA by 10–25% for flexible foundations on soft clay; enable SSI springs for foundation compliance