News

New version: UM 7.5

New UM 7.5 version is now available. Revision history is in versions.txt. Please find new features in recent UM reseases below.

v. 7.5.0.5
2015-02-10
* Multipoint contact model
   + Precalculated tables of contact point that make the multipoint contact model much faster
* Histogram window
   + Now supports export to BMP file
   + Now supports export of animation to AVI files

v. 7.5.0.3
2015-01-20
* Contact patch viewer
   + Adhesion zone
   + Tangential force distribution
* Railway wheel/rail profile editor:
   + Now supports new Miniprof MPT file format

v. 7.5.0.2
2014-December-20
* Train dynamics:
   + New traction mode [x=const] is added for simulation of longitudinal train dynamics (UM Train)
   - The bug regarding the calculation of resistance force in case of changing vehicle masses by using mass table (UM Train)
+ Now static variables in graphic window (for example, loaded from text file) can be saved as binary TGR/SGR files (binary UM file format). Every static variable can be saved in separate binary TGR/SGR file. It makes easier loading big files with, for example, experimental results.
+ Jacobian matrices for Multipoint contact model is implemented. It allows to use the
Multipoint contact model with the bigger error tolerance about 1E-6..1E-7.
+ Curve editor:
   + Curve as a sample is now available. Any curve now can be saved as a Sample. Sample is visible on the background of the plot area and allows the user to keep in mind (original) curve while modifing the curve.
   + Curve editor now includes buint-in tools to smooth the curve: weighted moving average and Hamming filter.
+ Totally renewed contact patch viewer

v. 7.4.1.0
2014-November-11
+ Periodic preset time functions in joints (Type=Curve)
+ Preset time functions in joints given by velocity (Type=Curve)

 
 
 

Publications

 All publications

Pogorelov D., Rodikov A., Kovalev R. Parallel computations and co-simulation in Universal Mechanism software. Part 1: Algorithms and implementation

Transport problems. Volume 14, Issue 3, 2019. DOI: 10.20858/tp.2019.14.3.15

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Sakalo V.I., Sakalo A.V. Criteria for predicting the initiation of rolling contact fatigue damage in the railway wheels and rails

Vestnik of the Railway Research Institute. 2019;78(3):141-148. (In Russian)

https://doi.org/10.21780/2223-9731-2019-78-3-141-148

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V. Sakalo, A. Sakalo, A. Rodikov, S. Tomashevskiy. Computer modeling of processes of wear and accumulation of rolling contact fatigue damage in railway wheels using combined criterion

Wear. Volumes 432–433, August 2019, 102900

Full paper (Available for free till 4/09/2019)

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Hongdi Wang, Zigang Deng, Shunshun Ma, Ruixue Sun, Haitao Li, and Jipeng Li. Dynamic Simulation of the HTS Maglev Vehicle-Bridge Coupled System Based on Levitation Force Experiment

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, VOL. 29, NO. 5, AUGUST 2019

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Rang Zhang, Yuanjin Ji, Lihui Ren, Gang Shen. A Straddle Monorail Running Gear with Single-Axle and Rotating Arm Axle Box Suspension

Urban Rail Transit. Published online: 10 October 2017. DOI 10.1007/s40864-017-0067-z

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Pogorelov, D.Yu. INFLUENCE OF DRILLING FLUID ON FREE OSCILLATIONS OF DRILLSTRING

"Oil and Gas business" network edition. 2018. №5. UDC 531.39

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Olshevskiy, A., Kulinichev, N., Olshevskiy, A., Kim, C. W., & Yang, H. I. Efficient three-stage approach to fatigue life assessment for transport machines in the context of stilt sprayer performance

Engineering Failure Analysis. Volume 81, November 2017, Pages 10-30 DOI: https://doi.org/10.1016/j.engfailanal.2017.06.028

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V. Sakalo, A. Sakalo, S. Tomashevskiy, D. Kerentcev. Computer modelling of process of accumulation of rolling contact fatigue damage in railway wheels.

International Journal of Fatigue, Volume 111, June 2018, Pages 7–15. https://doi.org/10.1016/j.ijfatigue.2018.02.002

Free full paper (available until March 31, 2018)

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Iman Hazrati Ashtiani. Optimization of secondary suspension of three-piece bogie with bevelled friction wedge geometry

International Journal of Rail Transportation, Published online: 09 Jun 2017 DOI 10.1080/23248378.2017.1336652

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Gennady Mikheev, Dmitry Pogorelov and Alexander Rodikov. Methods of Simulation of Railway Wheelset Dynamics taking into account Elasticity

First International Conference on Rail Transportation, Chengdu, China, July 10-12, 2017

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Zhuang QI, Wenlian ZHANG, Pengfei LIU and Qiang LEI. Study on the Dynamics Behaviour and MBS Modeling Method of a Subway Track Detecting Vehicle

First International Conference on Rail Transportation, Chengdu, China, July 10-12, 2017

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Qian XIAO, Chao CHANG, Jifeng ZHENG, Jiao FANG. Prediction of wheel/rail rolling contact wear under the situation of wheel/rail vibration

First International Conference on Rail Transportation, Chengdu, China, July 10-12, 2017

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Jia Xiaohong. Dynamic Performance of Metro Train Passing Through Turnout Branch in Depot

First International Conference on Rail Transportation, Chengdu, China, July 10-12, 2017

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Zhihui Chen, Lei Xu, Wanming Zhai. Investigation on the Detrimental Wavelength of Track Irregularity for the Suspended Monorail Vehicle System

First International Conference on Rail Transportation, Chengdu, China, July 10-12, 2017

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Maksym Spiryagin, Qing Wu & Colin Cole. International benchmarking of longitudinal train dynamics simulators: benchmarking questions

Vehicle System Dynamics, Published online: 11 Jan 2017  DOI: 10.1080/00423114.2016.1270457

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Dmitry Pogorelov et al. Train 3D: the technique for inclusion of three-dimensional models in longitudinal train dynamics and its application in derailment studies and train simulators

Vehicle System Dynamics, Published online: 11 Jan 2017  DOI: 10.1080/00423114.2016.1273532

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Alexander Olshevskiy, Chang-Wan Kim, Hyun-Ik Yang & Alexey Olshevskiy. Wear simulation for the centre plate arrangement of a freight car

Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility. DOI: 10.1080/00423114.2015.1023319

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Iman Hazrati Ashtiani, Subhash Rakheja and AKW Ahmed. Influence of friction wedge characteristics on lateral response and hunting of freight wagons with three-piece bogies

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 0954409716647095first published on May 3, 2016.  DOI: 10.1177/0954409716647095.

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R. Kovalev, A. Sakalo, V. Yazykov, A. Shamdani, R. Bowey & C. Wakeling (2016): Simulation of longitudinal dynamics of a freight train operating through a car dumper

Vehicle System Dynamics, http://dx.doi.org/10.1080/00423114.2016.1153115

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Iman Hazrati Ashtiani, Mehrnoosh Abedi. Effects of Liquid Cargo on Lateral Stability of B-Train Combination

SAE 2014, Commercial Vehicle Engineering Congress, Illinois, US

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Iman Hazrati Ashtiani, A. K. W. Ahmed, Subhash Rakheja, Jimin Zhang. Hunting Characteristics of a Freight Car in Presence of Secondary Suspension Non-Smooth Contact Dynamics

ASME Congress 2014, Montreal, Canada

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Iman Hazrati Ashtiani, Subhash Rakheja, A. K. W. Ahmed, Jimin Zhang. Hunting Analysis of a Partially-Filled Railway Tank Car

Joint Rail Conference 2015, San Jose, CA, US

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Iman Hazrati Ashtiani, Subhash Rakheja, A. K. W. Ahmed. Hunting and Derailment Analysis of a Partially-Filled Railway Tank Car

IHHA 2015, Perth, Australia

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Amir Kolaei, Iman Hazrati Ashtiani, Mehrnoosh Abedi, Subhash Rakheja. Applicability of Linear Slosh Theory on Stability of the B-train Combination

IAVSD 2015, Graz, Austria

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D. Pogorelov, O. Dmitrochenko, G. Mikheev, R. Gandikota. Flexible multibody approaches for dynamical simulation of beam structures in drilling.

Proc. of the ASME 2014 10th Int. Conf. on Multibody Systems, Nonlinear Dynamics, and Control, MSNDC2014, August 17-20, 2014, Buffalo, New York, USA. DETC2014-35113.

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D. Pogorelov, G. Mikheev, K. Valiullin, R. Gandikota. Use of multibody system approach for torque and drag analysis of long drill strings.

11th World Congr. on Computat. Mech., July 20-25, 2014, Barcelona, Spain, pp. 688-699.

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O. Dmitrochenko, G. Mikheev, D. Pogorelov, R. Gandikota. A nonlinear finite element for simulation of dynamics of beam structures using multibody system approach.

11th World Congress on  Computational Mechanics (WCCM XI), July 20-25, 2014, Barcelona, Spain, pp. 655-666.

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Kovalev R. Optimizing Multibody Systems: Some Implementations and Results. In Werner Schiehlen and Michael Valasek (eds.)

Preprints of the NATO Advanced Study Institute on Virtual Nonlinear Multibody Systems, Czech Technical University in Prague, Prague, 2002, pp. 107-112

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Pogorelov D. Multibody System Approach in Simulation of Underwater Cable Dynamics.

Programme and Abstracts. EUROMECH 398, Colloquium on Fluid-Structure Interaction in Ocean Engineering, Technical University Hamburg-Harburg, Hamburg, Germany, October 11-14, 1999.

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Pogorelov D. Differential-algebraic equations in multibody system modeling.

Numerical algorithms, pp. 183-194, 1998.

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Klaus-G. Hinzen and Roman Kovalev. Hiller’s seismoscope.

Seismological Research Letters, Volume 81, Number 5, September/October 2010, P. 804-810.

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