Mode Shape

Glossary Term

A mode shape is the deformation that the component would show when vibrating at the natural frequency.

The terms mode shape or natural vibration shape are used in structural dynamics. A mode shape describes the deformation that the component would show when vibrating at the natural frequency. However, the vibration and deformation do not occur until there is an excitation. Depending on this excitation, the result is the total vibration of a structural component, which is basically comprised of the individual vibration shapes.

Thus, natural frequencies and mode shapes indicate how the structure behaves under a dynamic load. The amplitudes of mode shapes are not suitable for a technical quantitative evaluation of the structural component (they are properly scaled in the solution). Rather, the mode shape characteristic is suitable for the qualitative assessment of the dynamics of the structural component.

Keywords

Mode shape Natural frequency Dynamics

Links

RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD
RFEM Dynamic Analysis
RF-DYNAM Pro - Natural Vibrations  5.xx

Add-on Module

Dynamic analysis of natural frequencies and mode shapes of member, surface, and solid models

Price of First License
1,030.00 USD
RFEM Dynamic Analysis
RF-DYNAM Pro - Equivalent Loads 5.xx

Add-on Module

Seismic and static load analysis using the multi-modal response spectrum analysis

Price of First License
760.00 USD
RFEM Dynamic Analysis
RF-DYNAM Pro - Forced Vibrations 5.xx

Add-on Module

Dynamic and seismic analysis including time history analysis and multi-modal response spectrum analysis

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1,120.00 USD
RFEM Dynamic Analysis
RF-DYNAM Pro – Nonlinear Time History 5.xx

Add-on Module

Nonlinear dynamic analysis to external excitations

Price of First License
1,120.00 USD
RSTAB Main Program
RSTAB 8.xx

Main Program

The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

Price of First License
2,550.00 USD
RSTAB Dynamic Analysis
DYNAM Pro - Natural Vibrations 8.xx

Add-on Module

Dynamic analysis of natural frequencies and mode shapes of member models

Price of First License
850.00 USD
RSTAB Dynamic Analysis
DYNAM Pro - Equivalent Loads 8.xx

Add-on Module

Seismic and static load analysis using the multi-modal response spectrum analysis

Price of First License
580.00 USD
RSTAB Dynamic Analysis
DYNAM Pro - Forced Vibrations 8.xx

Add-on Module

Dynamic and seismic analysis including time history analysis and multi-modal response spectrum analysis

Price of First License
1,120.00 USD
RSTAB Dynamic Analysis
DYNAM Pro – Nonlinear Time History 8.xx

Add-on Module

Nonlinear dynamic analysis to external excitations

Price of First License
1,120.00 USD