You have the possibility to download the following papers with involvement of DELTA JS professionals or DELTA JS software:
 | Non-Synchronous Tilting Pad Bearing Characteristics |
| This paper describes a new model for tilting pad bearings, which allows considering the non-synchronous characteristics. The influence compared to the classical model is demonstrated in an example. The paper was presented at the IFTOMM conference in 2010. (441 KB) |
| Rotor Dynamic Modelling as a Powerful Support Tool for Vibration Analysis of Large Turbomachinery |
| This paper describes two cases, where a rotor model helped to analyse vibration problems. In one case a balance correction was applied, in another case the vibration behaviour for different misalignments was studied. The paper was presented at the IFTOMM conference in 2010. (915 KB) |
| Application of MADYN 2000 to Rotordynamic Problems in Industrial Machinery |
| This paper from the year 2007 describes the requirements of a modern rotor dynamic tool by means of several practical examples. All analyses in this paper were carried out with MADYN 2000. (1.25 MB) |
| Detuning the Natural Frequencies of the Buckets of a Pelton Runner |
| This paper describes a method to detune the buckets of a Pelton runner. The method is based on the identification of a model from measured data. The paper was presented at the 7. International Conference on Rotor Dynamics in Vienna in 2006 organised by the IFTOMM and awarded as the best paper. (754 KB) |
| Hot Spots in Turboexpander Bearings: Case History, Stability Analysis, Measurements and Operational Experience |
| This paper from the year 2008 describes the case history of a vibration problem caused by a hot spot in a bearing (Morton Effect). Stability analyses and measurements for different variants to remedy the problem are show. (819 KB) |
| Spiral Vibrations of a Generator due to Slip Rings |
| This paper describes the hot spot effect (also known as Newkirk effect) in a generator rotor caused by the slip rings. It was presented at the 7. International Conference on Rotor Dynamics in 2006 in Vienna organised by the IFTOMM. (832 KB) |
| Spiral Vibrations of Rotors |
| This paper describes the hot spot effect (also known as Morton effect) and a method to analyse its stability. It was published in 1987 in the proceedings of the ASME conference on Rotating Machinery Dynamics. (476 KB) |
| Three Practical Examples of Magnetic Bearing Control Design Using a Modern Tool |
| This paper describes the design process and the associated tools for magnetic bearing controllers. It was presented at the IGTI conference in 1999 and later published in the ASME Journal of Engineering for Gas Turbines and Power. (298 KB) |
| Rotordynamic Design Considerations for a 23MW Compressor with Magnetic Bearings |
| This paper describes a challenging magnetic bearing application for a large natural gas compressor. It was presented at the IMechE Fluid Machinery Symposium in 1999. (301 KB) |
| Behaviour of a One Ton Rotor Being Dropped into Auxiliary Bearings |
| This paper describes the dynamic behaviour of a rotor with magnetic bearings being dropped into its auxiliary bearings. It was presented at the International Conference on Magnetic bearings in 1992. (640 KB) |
| Torsional Instability of a Geared Compressor Shaft Train |
| This paper describes the effect and the remedy of a destabilisation of a low torsional mode due to the gear pinion bearings. It was presented at an IMechE conference in 1996. (323 KB) |
| Influence of Seals with Frequency Dependent Characteristics on the Rotordynamic Behaviour of High Pressure Compressors |
| This paper describes an application of a honeycomb seal in a high pressure compressor. The modelling of the frequency dependent characteristic and the rotordynamic behaviour are shown. The paper was presented at a conference of the German VDI on fluid rotor interaction in 2001. (895 KB) |
| Influence of the Entrance Loss Factor on the Direct Stiffness of a Honeycomb Seal |
| This paper describes the influence of the entrance loss factor on the direct stiffness of a Honeycomb seal. It is shown, that a circumfertial variable loss factor yields much better agreement with measured results. The paper was presented at the 7. International Conference on Rotor Dynamics in Vienna in 2006 organised by the IFTOMM. (700 KB) |
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