Our team provides the following services that cover almost all tasks in design and
optimization of the rotating machine dynamic structures as the following:
- assembly and balancing issues that directly affect vibrations,
- stability and durability of machine components,
- flight safety.
The main task contents are:
Dynamic analysis of structures
- Optimization of engine dynamic structure.
- Buildup of dynamics simulation models of existing and newly created engine.
- Multi-level validation of engine models, including the test results and in-field operation data.
- Simulation and analysis of coupled flexural-longitudinal-torsional vibrations, taking into account casing and suspension performance.
- Determination of the critical elements of the engine structure, that influence the vibration activity.
- Computer simulation of design parameters influence upon the product vibration activity.
- Design of rotor bearing supports.
- Tuning of elastic-damping supports stiffness and damping.
- Analysis of machines with gearboxes, including planetary ones.
- Recommendations for improving machine vibration characteristics.
Transmission Dynamic Analysis
- Modeling and computational studies of the dynamic characteristics of the motor reducer.
- Creation of a model of a planetary gearbox, taking into account large movements of the satellites and gaps, taking into account the compliance of the rims.
- Determination of dynamic loads in bearings and gears of the gearbox.
- Determination of natural frequencies and vibration modes of the planetary gear model.
Design of Rotor Bearing supports
- Design of bearings with rolling elements – models with 2 and 5 degrees of freedom.
- Bearings of two and three contact points, determination of the equivalent load taking into account clearances, interference, etc.
- Dynamic characteristics of rotors with various sleeve bearings.
- Design of rotors with airfoil bearing.
- Supports with active magnet bearing.
- Analysis of the elastic-damping support dynamic characteristics.
- Analysis of the support elastic element stiffness.
- Calculation of the full stiffness matrices [6×6] of the supports.
- Analysis of axial vibrations of rotors with misaligned supports.
- Analysis of rotors with asymmetric stiffness and damping matrices of supports.
Modal Tests
- Buildup of assembly models for experimental natural frequencies measurement.
- Determination of the required test equipment parameters.
- Issue of the modal test methods for rotors and housings.
- Supervision of modal test at the company site.
- Modal test of engine components and assemblies by means of Alfa-Tranzit Co., Ltd.
- Test data post-processing of in order to validate DYNAMICS R4 or FEM models.
Technological Challenges
- Technical audit of detailed drawings and manufacturing and balancing technology.
- Simulation and analysis of technology factors and errors affecting the engine vibration state.
- Assessment of tolerances for assembly and balancing.
- Recommendations for improvement of the design, technology and production documentation.
- Analysis of acceptable imbalances and deflections, definition of the rotor correction planes for low-frequency balancing.
Production and Technology
- Analysis of the assembly and balancing works in the company workshops.
- Technical audit of the balancing and assembly production.
- Supervision of manufacturing, balancing and assembly.
- Maintenance of implementation of the technological measures for the assembly and balancing.
Diagnostics and Forecasting
- Development of software for vibration diagnostics and prediction of the engine technical status.
- Vibration diagnostics through simulation in DYNAMICS R4.
- Development of algorithms for indication of technical condition in diagnostic systems.
- Analysis of the results obtained in various systems for the technical condition diagnostics and prediction.
Consulting and Training
- Education seminars on the engine dynamics.
- Training and consulting services for the DYNAMICS R4 application.
- Consultations and advanced training for specialists in balancing and assembling.