--- title: "Rotor Dynamics" description: "Rotor dynamics. Engineering Service + ARMD Software. Torsional Vibrations. Lateral Vibrations. Fluid-Film Bearings. Rolling Element Bearings.     ROTOR DYNAMIC SIMULATIONS (i.e. analysis of flexural and lateral vibrations including bearing influence) are another subject area as part of the engi~neering" url: https://www.laschet.com/en/engineering/rotordynamics/ date: 2017-02-13 modified: 2026-06-24 author: "Dr. Andreas Laschet" type: page lang: de-DE --- # Rotor Dynamics # Rotor dynamics ## Engineering Service + ARMD Software ![3D Presentation of Vibrations of a Compressor Shaft / (c) RBTS](/wp-content/uploads/ARMD-Compressor-3D-02-e1487768552343.png) - #### Torsional Vibrations - #### Lateral Vibrations - #### Fluid-Film Bearings - #### Rolling Element Bearings **ROTOR DYNAMIC SIMULATIONS** (i.e. analysis of flexural and lateral vibrations including bearing influence) are another subject area as part of the engi~neering service. These CAE studies include the calcu~lation of critical speeds and acceptable operating conditions while consider~ing the shaft design and above all the charac~teristics of the ball, roller bearings, or the fluid-film bearings, respectively. The analysis also in~cludes the study of tor~sional vibra~tions as an option. Starting with smaller studies, which can be realized in a short time, you can „upgrade“ the engi~neering service step by step even up to a complete study, design and configu~ration of complex fluid-film bearings (journal, conical, thrust, tilting-pad bearings). *** [![Cooperation between Laschet Consulting and RBTS](/wp-content/uploads/RBTS-LOGO-01-e1487096749892.png)](http://www.rbts.com)***I am the official cooperation partner of ***RBTS, Inc.*** (U.S.A.) ([www.rbts.com](http://www.rbts.com)), which was acquired by ***Concepts NREC*** (U.S.A.) in January 2024 to further expand the engineering and software business. As official cooperation partner, I provide software and engineering support in close coordination with ***Concepts NREC*** – usually realized in efficient online meetings. Down~load (PDF) details of the [coopera~tion](/wp-content/uploads/AL-Cooperation-Concepts-NREC_EN.pdf). ## Advanced Rotating Machinery Dynamics – Software ARMD V6.2 The simulation software „**ARMD**“ designed by ***Concepts NREC** *is a very powerful CAE tool which is distributed and supported in Germany and Europe via my engineering office. Non-binding **LIVE presentations** can be arranged individually supported by an online meeting. The **ARMD** software packages/modules and software structure: ![](https://dev.laschet.com/wp-content/uploads/ARMD-V62.jpg) ![](https://dev.laschet.com/wp-content/uploads/ARMD-Structure.jpg) Download (PDF): [ARMD V6.2 – Description of the Software Package](/wp-content/uploads/ARMD-V62.pdf) Overview on the complete **ARMD software package**: - ARMD package: **ROTLAT** (Rotor Dynamics) [More ROTLAT information in detail …](/en/engineering/rotordynamics/armd-software-rotlat/) - ARMD package: **TORSION** (Torsional Vibrations) [More TORSION information in detail …](/en/engineering/rotordynamics/armd-software-torsion/) - ARMD package: **BEARINGS** (Fluid-Film Bearings) with the modules **JURNBR**, **HYBCBR**, **TILTBR**, and **THRSBR** [More BEARINGS information in detail …](/en/engineering/rotordynamics/armd-software-bearings/) - ARMD module: **COBRA** (Rolling Element Bearings) - ARMD module: **VISCOS** (Lubricant Analysis) ![Rotordynamic Model Generation and Mode Animation](https://dev.laschet.com/wp-content/uploads/Rotordynamics-1-1024x685.gif) ## ![](https://dev.laschet.com/wp-content/uploads/TORSION-01.jpg) ![Campbell Diagram](https://dev.laschet.com/wp-content/uploads/TORSION-02.jpg) ![](https://dev.laschet.com/wp-content/uploads/ROTLAT-03-300x205.jpg) ![](https://dev.laschet.com/wp-content/uploads/JURNBR-04.jpg) ![](https://dev.laschet.com/wp-content/uploads/THRSBR-03-300x247.jpg) *Figures and screenshots provided with kind permission of RBTS / Concepts NREC.* ## International Rotor Dynamics Seminars … more than 20 Years ![International Rotordynamic Seminars 2004-2015](https://dev.laschet.com/wp-content/uploads/International-Rotordynamic-Seminars-2004-2015-300x212.jpg) I would also like to inform you about the **International Rotor Dynamics Seminar & Short Course **which is usually held every fall. This seminar is unique in Europe and well accept~ed by many inter~national atten~dees for more than 20 years. [More information.](/en/seminars/) ## ARMD Training Courses – Online Training via Cisco Webex In close cooperation with my partner ***Concepts NREC ***I offer an** Online ARMD Training Course** any time (*language:* ENGLISH; *duration:* usually **8 hours **in total). Such a course is offered dedi~cated to one of the ARMD packages the customer ordered (**ROTLAT**, **TORSION**, **BEARINGS**). The course is usually structured in two parts on two sub~sequent days directly pre~sented by my US partner. More info about ARMD training ... **TRAINING COURSE** 1. „**Basic Training**„ covering the basic technologies concerning dynamics in rotating machinery *Duration:* **4 hours **concerning one of the ARMD packages ROTLAT, TORSION, BEARINGS 2. „**Advanced Training**„ referring to the software handling in detail; presentation of various general applications and case studies (Note: This is NOT a project related customer training.) *Duration:* **4 hours** concerning the ARMD software handling (current release) and presenting typical (general) applications and selected case studies. Due to the time-zone shift such a course can only start at 08:00 a.m. or 09:00 a.m. US time (at the earliest); i.e. for central Europe: **training start not earlier than 14:00 or 15:00 = 02:00 p.m. or 03:00 p.m. (CET = UTC+1 / summer: UTC+2)**. Depending on customer demands, such a training course can be also structured individually according to your demands. Please [contact me](https://dev.laschet.com/en/contact/). Independent of a software training course I also offer a **custom-tailored engineering service** concerning your current project. Please send me your inquiry ([submission of your inquiry](https://dev.laschet.com/en/contact/)). ## Further Information on Special Sites Please visit the following special sites for more detailed information ... ### [Torsional Vibrations in Drive Systems](/en/engineering/torsional-vibrations/) *Analysis and simulation of torsional vibrations in drive systems (drivelines, powertrains) of rotating machinery, vehicles, ships. [Learn more …](/en/engineering/torsional-vibrations/)* --- ### [Virtual Engineering, Development, Simulation](/en/engineering/virtual-engineering/) *The virtual development process requires suitable R&D software tools, simulation environment, measurements, field tests, experiences. [Learn more …](/en/engineering/virtual-engineering/)* --- ### [Support – Questions & Answers](/en/engineering/support-questions-answers/) *This is our customer support to get you started: compilation of im~portant questions and first answers. [Learn more …](/en/engineering/support-questions-answers/)* --- ### [Webinars](/en/webinars/) *Free webinars as online support to discuss important topics in the engineering field. [Learn more …](/en/webinars/)* --- ### [International Engineering Seminars & Short Courses](/en/seminars/) *International engineering seminars in preparation.* ## Further Information as Downloads More information are also summarized in special documents (PDF), which you can download here ... - [ARMD Software: General Description (Overview)](/wp-content/uploads/ARMD-V62.pdf) - [ARMD Software: Description of Single Packages](/wp-content/uploads/ARMD-PACKAGES-V62.pdf) - [Engineering Services: ](https://dev.laschet.com/wp-content/uploads/AL-DriveTechnology_EN.pdf)[DRIVE SYSTEMS (complete overview)](https://dev.laschet.com/wp-content/uploads/AL-DriveTechnology_EN.pdf) - [Engineering Services: INDUSTRY](/wp-content/uploads/AL-Industry_EN.pdf) - [Engineering Services: RECIPROCATING & SCREW COMPRESSORS](https://dev.laschet.com/wp-content/uploads/AL-Compressor_EN.pdf) - [Engineering Services: PUMPS](https://dev.laschet.com/wp-content/uploads/AL-Pump_EN.pdf) - [Engineering Services: SHIPBUILDING](https://dev.laschet.com/wp-content/uploads/AL-Marine_EN.pdf) - [Engineering Services: TEST STANDS](https://dev.laschet.com/wp-content/uploads/AL-Test-Stand_EN.pdf) - [Coopera~tion with Concepts NREC (US)](/wp-content/uploads/AL-Cooperation-Concepts-NREC_EN.pdf) --- Do you already know the **HELP AREA (Support - Questions & Answers)**? This link will take you there immediately: [**QUESTIONS & ANSWERS**](https://dev.laschet.com/en/engineering/support-questions-answers/)