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Tag: Validation & Verification

Validation – Verification – Our solutions

Expert reports on running dynamics

Customer: Various customers

Project tasks

  • Driving evaluation of all types of railway vehicles including specialties such as two-way vehicles and tram trains
  • Driving evaluation and assessment of work and stability of crane vehicles, lifting platforms, excavators, bridge soffit devices, etc.
  • Accompaniment of speed increases of existing vehicles
  • Driving assessment on assignment of network access points
  • Extension of approval in State A based on approval in State B

Our Approach

In a first phase, the processes and the scope of approval is negotiated with the responsible authorities. This is essential as it dominates the time and costs of the approval process as well as the risks involved. In a second phase, the agreed evidence is then provided (simulations and tests performed) and evaluated. In the third phase, the expert report is prepared based on these reports on simulations and tests and – if required – represented before the authorities.

Customer benefit

The vast experience of PROSE’s experts leads to an optimal definition of processes and requirements from the beginning. Customers also appreciate the swift feedback on the submitted documents and, in case of problems, the support in finding solutions. Especially in countries without formal recognition of experts, it
is important that the customer can expect that the expert opinion will be accepted by the regulatory authority. The broad acceptance of PROSE’s experts ensures this.

Expert report on running dynamics of an Atlas road-railexcavator

Customer: Atlas GmbH, Germany

Project tasks

  • Structuring of approval requirements and proofs
  • One-time monitoring of tests for the first vehicle variant
  • Expert assessment for the approval of the road-rail-excavation according to §32 EBO in Germany (running dynamics incl. safety against derailment and stability criteria)

Our Approach

PROSE has developed the verification concept together with the manufacturer, witnessed some selected type tests and prepared the expert report based on the basis of the reports on calculations and tests provided.

Customer benefit

The wide experience of the experts at PROSE leads to an optimal definition of processes and requirements from the beginning. The active process design leads to a solid and target-oriented verification process involving authorities, manufacturers, test centers and other third parties. The customers also appreciate the quick feedback on the submitted documents and, in case of problems, the support in finding solutions.

 

Development and delivery of module test stands for railroad construction machines

Customer: Plasser & Theurer, Export von Bahnbaumaschinen, Gesellschaft m.b.H., Austria

Project tasks

  • Development, delivery and commissioning of test benches for vehicle modules for construction machinery (e.g. power pack, cabin)

Our Approach

For the specific implementation of the tests, PROSE developed suitable algorithms for an optimal test process. PROSE was responsible for the complete delivery of the test stand in the project, from the conception and construction to the delivery of the fully assembled test benches.

Customer benefit

Plasser&Theurer benefited from PROSE’s engineering experience during the project. By outsourcing the entire development and engineering project, the customer had the advantage of having fully designed and assembled test benches available by the time the first vehicle modules were completed. The commissioning of the test benches by PROSE ensured that the components to be pre-tested only had to be mounted and connected to the test frame, which significantly reduced the overall production and commissioning time.

 

Running dynamics analysis of rail vehicles (MBS simulation)

Customer: various customers

Project tasks

  • New vehicle developments:
    Feasibility studies, risk analysis (failure conditions) and support of concept studies based on computer simulations
  • Vehicle approval:
    Simulations for the assessment of running characteristics, model validation, simulations for the extension of approvals, simulations related to track access charges
  • Investigation of operational issues:
    Clarification of causes for derailments, assessment of the effects of changes, analysis of unexpected wear, wheel-rail interface studies
  • Special operational conditions:
    Pushing/pulling of inoperable multiple units, propelling tests
  • Wheel set torsional vibrations
  • Special applications such as gauge changing bogies, maglev or (suspended) monorails

Our Approach

PROSE has many years of experience in the dynamic simulation of rail vehicles, acquired through the running dynamic analyses for various own bogie developments and many calculations for manufacturers and operators. PROSE has also supported various innovative developments and research projects. Due to this expertise, PROSE is the suitable partner for the investigation of challenging questions in the field of rail vehicle dynamics. Through analyses and simulations, PROSE helps customers to identify weak points at an early stage, to avoid costly test series and to decisively improve the quality of the products.

PROSE covers the entire range of simulation steps, from the definition of the simulation task, the system boundary conditions and the compilation of the required model parameters to efficient model building, execution of the simulations and evaluation of the results. Based on many years of experience, PROSE is able to reliably estimate parameters which are difficult to determine and to select the appropriate modelling depth for the respective problem. The commercial simulation software system SIMPACK as well as special applications developed in-house are available for the calculations. Depending on customer requirements, PROSE carries out analyses in parallel to the design process in the own development team or as part of the customer’s team. PROSE also contributes with interdisciplinary know-how to non-railway-specific solutions.

Customer benefit

Qualified simulations reduce the development risk or help to solve problems that have occurred. In addition to a qualified calculation, PROSE attaches great importance to the interpretation and presentation of the results to the customer, including in-depth explanations and the necessary formal documentation relevant to homologation if requested. PROSE can also provide coaching support for simulation processes and act as a  neutral consultant. Due to a flexible organisation, PROSE can respond to customer requests at very short notice.

         

MBS-calculation safety against derailment of an electric track vehicle

Customer: ROBEL Bahnbaumaschinen, Germany

Project tasks

  • MBS-calculations to evaluate safety against derailment in track twists based on the EN14363:2019
  • Investigation with cranes in transfer mode and in two different working positions
  • Determining of existing reserves of the lifting load
  • Presentation of the results regarding the EN14033-2:2017 appendix H to the technical supervisory authority (TAB)

Our Approach

PROSE created an MBS model of the track vehicle and simulated runs through critical curves with superelevation and maximum track twist considering the specifications from the EN14363 for the vehicle in transfer mode and in two different working positions with corresponding crane position and lifting load.

Customer benefit

With the MBS-simulations PROSE was able to prove the safety against derailment of the track vehicle in twisting sections of track by calculations and to determine the existing reserves of the lifting load in the two working positions. Furthermore, the results are used in the approval process as a presentation for the technical supervisory authority (TAB).

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