Market forces of the 21st century call for the production of robust, well engineered, minimal cost, first-to-market products. Industry presented with these strict and challenging requirements are facing the need for the implementation of state of the art optimization practices along the complete product development and manufacturing cycle.
PROTOS´s proven expertise and capacity can assist clients with their day to day challenges and aspirations in the tasks related to product development :
The following sections outline the global content of these activities in the Computer Aided Engineering product Qualification and Acceptance process. The same engineering process is applicable to every kind of product that its working environment dictates a qualification against similar inputs i.e. :
i) Static Loads
ii) Dynamic Vibrational Loads
iii) Dynamic Acoustic Loads
iv) Dynamic Shock Loads ( Crash, Pyrotechnic)
v) Thermal Loads,
Conceptual and Detailed Design
Design support is offered from the Conceptual stages up to the Detailed Drafting of Engineering Drawings using appropriate ( CATIA, UGS, Solid Modelling, etc ) Software.
Modelling of structures via the use of Finite ( FEM )and Boundary Element ( BEM ) methods. Use of standard tools for Modelling (I-DEAS, PATRAN/NASTRAN, ANSYS, RAYON, etc). Simulation of mechanical behaviour and loading environment.
For example, the Structural and Acoustic models of a Vehicle or Washing machine can be constructed and the combination of these two models would provide a Vibro-Acoustic model that predicts both Vibration and Acoustic behaviour during service. The in service working environment input loads that the structure under consideration must be able to withstand can also be modelled in terms of certain mathematical functions.
Solution of the Simulation models and derivation of analysis predictions of the structural behaviour under distinct in service loading environments (Static, Dynamic, Crash-Shock, Vibro-Acoustic Response, etc). Effectively the inherent mechanics ( stiffness and strength ) and the mechanical behaviour of the modelled structure under its operating environments can be predicted.
The inherent Dynamics of a Vehicle can be predicted in terms of Normal Vibration Mode characteristics (Resonant frequencies, Mode Shapes, Damping, Generalised Parameters) while its inherent Statics can be predicted in terms of unit static loads applied at specific locations.
Predictive response analysis of the structure mechanics derived under the realistic environment loads can be used to assess the feasibility of the current Design. If stiffness (Natural Frequencies) and strength (Stresses) problems are identified, a revision of the Design is possible to avoid defective products. The existing models are thus usable as Virtual Prototypes in the Design Assessment work.
A portfolio of specific Dynamic ( Modal, Operational, Vibration, Shock, Release, etc ) and Static ( Stiffness, Strength, Fracture, etc ) tests can be performed on new Design Prototype structures. These tests aim to measure the structural behaviour of the test piece.
The measured properties are then used to verify and if necessary update the predictive quality of the existing models of the test piece. This verification of the models is an essential requirement for them to be "trustworthy" for use in further Predictive analysis and Design changes.
The work involved in this area is possibly the most crucial in the whole CAD / CAE process of a new product development. Once Mathematical Model Simulations and Response Predictions are available they can be used as Virtual Prototypes to help Optimise the Design of the product and accelerate its introduction to the market before the competition product gets there. It is a fact of life that even the combination of State of the Art of computers and highly trained Analysts does not eliminate the need for mathematical model verification and Correction or Updating.
This so called Model Updating process is based on comparisons (Correlation) of the Model Predicted Responses with those Measured from Tests. Based on the Correlation results an Updating of the model is requested. This Updating can be a time consuming and experience demanding process. The precisely Updated model can however be used as a Virtual Prototype which then used to Optimise the Design and eliminate structural failures and sub-standard performance without having to resort to the construction of many expensive and time consuming Physical Prototypes.
PROTOS can support their clients over the whole or distinct stages of the Product Qualification Process. The client could for example provide PROTOS with the Engineering Drawings of the structure and possibly any available Prototype(s). PROTOS could then carry out the various tasks involved in the CAD/CAE qualification of the new product and return to the client the updated and optimised Design that is guaranteed to produce a structure that will survive its operating environments and will provide an optimum Mechanico - Acoustic performance during its service life.
We Can Help with :
Static Stiffness and Strength Tests
Vibration (Measurement, Analysis and Diagnostics)
Noise (Measurement, Analysis and Diagnostics)
Ground Vibration Testing (GVT)
Non-Destructive Damage Detection
Structural Health Monitoring
Noise Source Identification
Squeak and Rattle
Calibration ( Sensor and Equipment )
End-of-line Product Testing
Measurement of Material Mechanical (Stiffness and Damping properties)
Model Correlation and Updating (Sensitivity Analysis and Constrained Optimisation)
Product Design Qualification
Acoustic Test of DMDP Satellite Antena
Grounded Condition Modal Test of ASCAT Satellite Antena
Micro-vibration Test Campaign of ARTEMIS Satellite Engineering Model for EADS-CASA Espacio / ALENIA
Modal Test on Automotive Engine Bracket
Vibration Test of Cellphone
Noise Source Detection Test ( Acoustic Holography ) Test on Vehicle Engine Compartment
Sound Quality Test on Vehicle Component
Satellite Antenna Stiffness and Damping Measurements in Simulated Vacuum for EADS-CASA Espacio / ESA ( Project LARDAL )
Finite Element Model ( FEM ) of Satellite Antenna
Predicted FEM Normal Mode Shape of Satellite Antenna
Some of the Companies that PROTOS represent (Please click on icon to access web page):
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