Home * Civil * Structural * Geotechnic * Site Survey & layout * Calcs * Contact & Links * Demo & Buy

Software for Civil, Structural & Geotechnic Engineers, Architects, Surveyors.

For more details, downloads, prices, go to Formation Design System's website

Multiframe4D Features

*Graphical specification of link and masses

*Rescale, generate and duplicate functions

*Graphical display of mode shapes and time history

*Master-slave joint linking

*Prescribed displacements

*Joint masses

*Distributed or lumped member masses

*User controlled convergence criteria

*Ground acceleration or dynamic loads

*Animation of mode shapes including QuickTime support

*Animation of time history response

Formation Design Systems Title Page

Multiframe 3D
3D Analysis

Multiframe 2D
2D analysis

Section Maker
Section properties calculation

Steel Designer
Steel code checking



Multiframe 4D - Dynamic analysis

* Modal analysis

* Time history analysis

* Customisable force and acceleration database

The most demanding job a structural designer is faced with is the dynamic analysis of an existing or proposed structure. To help solve these difficult problems, Multiframe 4D brings dynamic analysis to the Multiframe range. Using the same set of powerful and flexible modeling tools available in all the Multiframe programs, 4D is the fastest way to determine the dynamic response of the frames you are designing.

Multiframe 4D features a fast solver which uses sub-space iteration to quickly find the natural modes, frequencies and periods of your structures. For more complex problems, Multiframe 4D's time history response option allows you to simulate the structure's response to seismic or other dynamic loading over time. A built-in library of earthquake spectra can be used or your own dynamic data sets can be entered and stored for future use

Either lumped or distributed masses may be used to automatically take account of the self weight of the structure. User control of the number of mode shapes or time steps and convergence criteria make it easy for you to calculate a quick estimate of dynamic response or a more rigorous and accurate solution. When analysis is complete, a click on a joint or member reveals a graph of its response over time. Alternatively, the whole structure can be animated to show the total structural response.