True-LDE:
Explore Linear Dynamic Events
True-LDE provides efficient, targeted results from Modal Participation Functions (MPFs) in time, frequency, and PSD domains with filters based on the directional influence of modes.
True-LDE interfaces with durability software with loading functions and duty cycle exports.
When combined with modal dynamic load reconstruction from True-Load, True-LDE enables virtual design iterations. After collecting strain data on an initial prototype, the loads calculated with True-Load can be used to explore results in design variations.
The True-LDE Workflow: Linear Dynamic Event Exploration
1. Calculate MPFs
2. Visualize results in True-LDE
3. Change FEA design and generate new results
- no need to re-solve for MPFs with Equivalent Static Modes (see below)
4. Repeat: Visualize results in True-LDE and make FEA design changes as necessary
5. Complete a final physical test with high confidence in the design that is built
Virtual design iterations with True-Load and True-LDE reduce design-build-test cycles and increase confidence in designs before they are built.
The Details
Critical Understanding
Linear Dynamics is a critical part of understanding the real-world response of structures, but examining Linear Dynamic Events interactively is challenging with other FEA post-processors. True-LDE provides fast and efficient results in an intuitive environment.
Equivalent Static Modes
Equivalent Static Modes (ESM) is a new technique to estimate the dynamic response of a system through multiple design iterations using previously calculated modal participation factors (MPFs). ESM is about 10x faster than alternatives (i.e. eigenmode calculation).
MPF Calculation Options
After calculating eigenmodes with the native FEA solver, MPFs can be calculated in True-Load or in the FEA solver. Either way, True-LDE increases solve speed by 90%!
Calculating MPFs Mathematically in an FEA Solver
Generating MPFs with any FEA solver is computationally lighter with True-LDE.
Calculating MPFs Empirically in True-Load
MPFs can be reconstructed from measured strain using the True-Load workflow. Eigenmodes take the place of unit loads in a typical True-Load load reconstruction project.
Advanced Features
Pre-load Effects: Understand the effects of the baseline environment on results.
Gauges of Interest: Explore results in key locations.
Design of Experiment: Test the influence of each load case.
A Proven Solution
True-Load, True-QSE, and True-LDE were developed out of necessity by Dr. Tim Hunter during a long career in product development. They are built to deliver products with many ease-of-use and advanced features. Training and support are included to ensure success.