RAILWAYS - KERETA API
PT. Otoman Indonesia was established with a vision to modernize railway technology especially in telecommunication. Over the years, PT. Otoman Indonesia has implemented various telecommunication & IT infrastructure projects in the field of railways. We have installed railway telecommunication technology equipment to remote and rural stations. This can improve communication services between stations that are interrelated.
In this sub-business line, we focus on Backbone (Fiber optics & data network) and Radio Communication systems such as Wireless Network, Radio Link, and Radio Traindispatching.
LOCOMOTIVE Module for NTSB KNKT Indonesia
The program package includes module UM Loco, which is intended for simulation of dynamics of railway vehicles of different types (diesel and electric locomotives, passenger and freight wagons) in both straight and curve railroad tracks. The simulation is performed in time domain by means of numeric integration of differential or differential-algebraic equations of motion. UM Loco allows the user to create fully parameterized models of vehicles. Geometrical, inertia and force parameters may be specified using identifiers. The parameterization of a model is the base for effective analysis and optimization its dynamical behavior.
In some cases to obtain more accurate solution and/or perform a fatigue analysis it needs to introduce in the model of the vehicle flexible bodies imported from ANSYS or NASTRAN instead rigid ones. It could be done with the help of the UM FEM module.
The paper “Simulation of dynamics of railway vehicles in Universal Mechanism software” (8 pages) is an overview of accumulated experience of using Universal Mechanism (UM) software in railway industry. The list of UM users, applied researches and the Universal Mechanism key features are discussed.
Adequacy of the mathematical models of UM was proved with the help of Manchester Benchmarks, click here for details.
– to calculate the critical speed;
– to analyze 3D dynamics of a vehicle or a train in time domain on straight track or curves with/without irregularities;
– to analyze vehicle dynamics depending on wheel and rail profiles;
– to create multivariant projects for scanning the vehicle/train dynamics depending on any parameters;
– to compute natural frequencies and modes as well as root locus;
– to create hybrid rigid-elastic models of vehicles;
– to perform a durability analysis of parts of vehicles.
The module for simulation of train dynamics (UM Train) is developed in the program package “Universal mechanism”. This module automates the process of train model creation and the analysis of obtained results.
The module allows computing the longitudinal dynamics of train in braking, traction and idling modes on a railway track of any configuration. Not only common variables for a mechanical system such as coordinates, velocities, accelerations, reaction forces etc but variables which are specific for a train (for example forces in intercar coupling and braking forces) are available for a user.
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