Multiframe 4D - Dynamic analysis
Multiframe 4D contains everything in Multiframe 3D plus -
- Modal analysis
- Time history analysis
- User defined masses
- Customisable force and acceleration database
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One of the most demanding jobs 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 modelling 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.
