Highlights of TURBINE-PAK NON-LINEAR:
- Designed for practical and effective NON-LINEAR analysis of vibration
transients and limit cycles in multi-bearing rotor systems
with up to 50 bearings on elastic foundation (hyperstatic system analysis).
- Extensive hydrodynamic and hydrostatic
bearing support (including multi-pad, elliptical, fixed pad, rolling pad and pivot
pad journal bearings).
- Optimized real-time Computational Fluid
Dynamics (CFD) calculations for hydrodynamic bearings (no databases) - enabling
almost an infinite number of bearing configurations.
- Comprehensive treatment of machine alignment.
(In multi-bearing systems with non-linear hydrodynamic bearings vibration response
depends on bearing alignment).
- Modelling vibration of a non-straight (pre-bent)
shaft in hydrodynamic bearings.
- Modelling vibration of machines with a
vertical shaft in hydrodynamic bearings.
- High computational efficiency on Pentium class computers running
Win98 - up to several steps per second are achievable for a RBF system with 5
- Visualization. Solutions can be animated.
- Open style, fully documented ASCII type
input and output files, enabling the user to access, process and/or generate data
practically without restrictions.
- Mobile computing. TURBINE-PAK NON-LINEAR
can be installed on a portable computer (laptop) to assist in field diagnostics
and field troubleshooting without any loss of performance.
- Sharing the
RBF input data files with TURBINE-PAK.
- Tested and verified by leading Turbine
Manufacturers, academics and Research Laboratories
- Developed and maintained by scientists
(PhD) with over 25 years of research and consulting experience in the field of
rotordynamics and vibration analysis. If you find a feature that is missing, we
can customize TURBINE-PAK NON-LINEAR to meet your particular requirements.
Rotor-Bearing-Foundation (RBF) System
Vibration response computation
TURBINE-PAK NON-LINEAR computes the transient RBF system vibration
response as a function of:
- the system configuration (static load and alignment)
- bearings (types, geometry, lubricant properties etc.)
- shaft (geometry, pre-bending, material properties, temperature
- foundation and casings dynamic properties (general FEM superelement
- rotor speed
- excitation forces and unbalance
TURBINE-PAK NON-LINEAR solver uses variable order, variable
step, adaptive predictor-corrector procedure based on the 4-5-th order Runge-Kutta-Fehlberg
Modelling changes in transient vibration due to parameter
User can modify, among other parameters, bearing
alignment, unbalance, bearing types, bearing geometry or other properties, rotor
speed, foundation properties etc., and observe resulting changes in the transient
vibration response of the system. Response to step changes in any parameter
(such as step change in unbalance, alignment or rotating speed for example)
can be evaluated. Various cases can be conveniently compared.
TURBINE-PAK NON-LINEAR animated graphical interface greatly enhances
our understanding of machine dynamic characteristics and vibration response. TURBINE-PAK
- Global motion animation
- Animation of the detailed behavior of the shaft in each bearing,
showing foundation, shaft and relative motion, as well as bearing reactions and
- Accurate phase relationships is preserved
in TURBINE-PAK NON-LINEAR animation.
animation of the response to unbalance and other excitation
- Rapid comparison of various animated systems/cases/conditions
Fig 1. Reaction in one of the hydrodynamic bearings during
the development of a Limit Cycle vibration in the vertical pump
TURBINE-PAK NON-LINEAR applications
TURBINE-PAK NON-LINEAR is a practical, efficient and effective
tool in investigating
- transient vibration phenomena in rotating machinery
- vibration behavior of the rotor-bearing-foundation system
following the loss of stability
- imit cycles in non-linear systems and their development (see
Fig 1 above)
- limitations of linearized analysis approach implemented in TURBINE-PAK for large vibration amplitudes
- solutions to vibration problems in rotating machinery that develop
limit cycle vibrations. Using TURBINE-PAK NON-LINEAR, vibration problems can be
simulated and tested using a computer model of a machine. Possible solutions and
remedies can be tested on the computer model first, before they are implemented.
- TURBINE-PAK can be used as an aid in machine
monitoring and maintenance. Every machine operator can greatly benefit from having
a reliable computer model of his particular machine that is capable of predicting
its vibration as a function of the operating parameter change.
TURBINE-PAK NON-LINEAR comes with comprehensive documentation
that includes the Theoretical Manual.
Technical support is available to registered users
only and is normally limited to the assistance in use of all available features
of TURBINE-PAK NON-LINEAR and solving problems preventing the user from using
Access to our support is available 24 hours a
day, most days in the year via email firstname.lastname@example.org for the first 12 months
after User registration. Customization of the program, as well as support for
longer periods of time can be arranged at additional cost. The benefit of maintaining
the User Support is receiving TURBINE-PAK NON-LINEAR software upgrades at no additional
For the first time Users of TURBINE-PAK NON-LINEAR,
SER will, on the basis of the User data, prepare a complete TURBINE-PAK data set
for one set of rotor-bearing-foundation system. This free modeling service is
designed to provide the User with a complete, ready to use system, immediately
If the User data is unavailable at the time of
ordering TURBINE-PAK NON-LINEAR, SER will deliver the software with a complete
example set of data, representing some hypothetical rotor-bearing-foundation system.
On-site User training is available on request in the following
- theoretical rotordynamics
- vibration analysis
- machine modelling for vibration analysis - the fastest way from
drawings to a computer model
- effective using of TURBINE-PAK NON-LINEAR
TURBINE-PAK NON-LINEAR software updates are free
of charge during the first 12 months after TURBINE-PAK NON-LINEAR registration
as well as thereafter, providing that the User continues to maintain the Technical
Support from SER after the initial 12 month period.
- Chalko T.J., Li D.X., Modelling Turbine Vibration in Terms of
its Load Variation, International Journal of Rotating Machinery,
1995, Vol 1, No 3-4, pp. 295-299
- Chalko T.J., Li D.X., Bearing Alignment Estimation in Rotating
Machinery, Proceedings of 6-th International Symposium on Transport Phenomena
and Dynamics of Rotating Machinery (ISROMAC-6) Honolulu, Hawaii, USA, Feb 23-28,
- Li D.X., Chalko T.J., Hydrodynamic Characteristics
of Combination Pad Journal Bearing, Proceedings of 6-th International Symposium
on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-6) Honolulu,
Hawaii, USA, Feb 23-28, 1996
- Chalko T.J., Li D.X., Estimation of Alignment
and Transverse Load in Multi-Bearing Rotor Systems International Journal
of Rotating Machinery, 1996, Vol. 1, No. 7-8, pp 593-602
Dr Thomas J. Chalko
Fax: +61 5681 6361
945 Gunyah Rd, Mt Best,
Vic 3960, Australia
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Research P/L 2000, All rights reserved