2.1 SOURCE v1.8

Table of Contents

SOURCE v1.8.4

18 July 2023

This update contains several usability and productivity improvements.

New features:

  • The channel selector in graphs now groups the channels by their assigned type, such as indicator response or target response. This helps to quickly find the right channel, or create a selection of multiple channels of the same type.
  • When plotting datasets, the channels appear in the order of the mapped master channels. Any unmapped channels are appended below, and shown in the category Other channels.
  • In the 3D viewer, you can now select the measurement quantity that you like to animate from the toolbar.


  • In Fluent TPA, the order of the Multiply and Inverse operations have changed, to better represent the linear algebra that is expressed. From now on, users are supposed to get an FRF Matrix, then choose Multiply and Inverse and specify the operational data instruction to use for the operation, e.g.: f2 = [Get | y42] [Inverse | u4]. Older scripts may need to be adjusted to correspond to this new format.
  • This version contains an algorithm for auralization using IIR filter representations of FRF matrices. Currently, support is limited to Fluent TPA and therefore experimental. Future versions will offer turnkey analysis solutions for time-domain auralization and blocked force characterization.

SOURCE v1.8.2

2 June 2023

SOURCE version 1.8 provides new features and a pre-release of Fluent TPA.

Complex Power Analysis
Complex Power can be calculated from collocated (vectorially associated) vectors of (blocked) force and velocity. In practice, this means that you can calculate power at every measurement point where you have force degrees of freedom and an estimation of velocity at that same point, in the same direction. Every pair of force and velocity yields a complex-valued partial power. Individually, these give information about the active and reactive power, which relate to energy dissipation and energy exchange. When summed together, it gives information about the distribution of vibration power (dissipation) throughout your assembly.

SOURCE leverages the Virtual Point capabilities to calculate accurate complex power. Two new options are available for In Situ Analysis under Settings > Additional Calculations:

  • Virtual point responses. This will calculate virtual point responses for the VP response channels that have been activated in the analysis. First, you will need to create virtual point response channels in the Virtual Points card in the Operational Data module. These should be made to master channels, and carry the [VP] marker in front of the channel. Next, you will have to assign measured (indicator) response channels to the respective virtual points. This is done in the Edit mode of the Channels card. Finally, you activate the newly created VP responses for your analysis. This will create the category Virtual points responses in your results tab.
  • Complex power. This will activate complex power analysis. It uses the calculated VP responses, and matches every found VP response channel with a corresponding VP (blocked) force channel. For every matched pair, a resulting complex power channel is generated.

Read more instructions here.

Fluent TPA (experimental)
Fluent TPA is a completely unique approach to working with Transfer Path Analysis. It originates from the idea that every TPA analysis can be brought down to essential processing steps on datasets (operational data or transfer function data), often formulated as matrix equations (linear algebra). A sequence of these instructions would govern the calculation of for instance in-situ blocked forces; however, only for a single dataset.

Fluent TPA provides you with the building blocks for these matrix equations, combined with steps that focus on batch processing; i.e. querying the right datasets in larger projects. As such, it combines the power of SOURCE to efficiently handle large data collections, with the freedom to decide on your own specific analysis.

Fluent TPA is now released as an experimental feature. The scope of features will be extended over time. You can experiment with it by creating a new Fluent TPA analysis in Analyze under the drop-down to create an analysis. This opens the Fluent TPA editor. Scripts made here can be saved and loaded for re-use.

Read more instructions here.

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