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Tag: Mechanical vehicle & systems engineering

Mechanical vehicle & systems engineering – Our solutions

Investigation on European EMU brake systems

Customer: leading international brake equipment manufacturer

Project tasks

  • Project management
  • Requirements capture
  • Concept development
  • System integration

Our approach

The project aimed to assist a leading international brake equipment manufacturer in navigating the complex landscape of European brake system regulations, generic design principles, and requirements for brake certification. The primary challenge was to provide the manufacturer with a consistent and clear understanding of these regulations to facilitate the development and certification of their brake systems for the European market. This support was crucial for ensuring compliance with stringent European safety standards and improving the manufacturer’s competitive edge in the international market.

Based on publicly available information and own experiences, PROSE provided a comprehensive investigation report with following main chapters:

  • European and American design philosophy and safety principles for emergency braking in EMU
  • Brake performance of current EMU train designs in Europe
  • Redundancy on emergency braking command and functions
  • Emergency Braking according EN 16185-1 and EN 15734-1
  • Brake system requirements for EMUs according to European TSI regulations
  • Brake system control signal according to EN 15611:2020

Customer benefit

As a result of this project, PROSE’s customer obtained an in-depth and detailed understanding of the general requirements and best practices associated with European EMU brake design. This comprehensive insight enabled the manufacturer to align their products with European standards, thereby enhancing their ability to meet certification requirements. Additionally, the detailed investigation report served as a valuable reference for the customer’s engineering and design teams, facilitating informed decision-making and innovation in brake system design. Overall, the project significantly boosted the customer’s capability to produce compliant, reliable, and competitive brake systems for the European rail market.

 

      

Design and approval strategy for a rail-bound maintenance machine

Customer: SCHÖMA, Germany

Project tasks

  • Vehicle authoirsation strategy
  • Design assurance (Systems Engineering)
  • Concept development
  • Technical evaluation of offers and technical coordination with suppliers
  • Project management

Our approach

SCHÖMA plans to develop a proven, powered, three-part rail-bound maintenance machine with cab, loading platform and crane called HERO. SCHÖMA needs support in developing the authorisation strategy to fulfil the EN 14033 standards and in defining the design process including verification and validation.

PROSE developed the decision-making basis for the approval process enabling a defined combination of the three vehicles of the working machine to be approved and the verifications and evidence according to EN 14033 to be provided. PROSE also supported SCHÖMA in the budget planning phase of the development of the HERO work machine in the evaluation of supplier offers for systems and components such as the power train, braking system, power generation, train protection (ETCS) and heating, ventilation and air conditioning (HVAC). In addition, PROSE defined the design phases and the design assurance process according to the systems engineering methodology to ensure a defined and structured design process.

Customer benefit

​PROSE has structured and optimised SCHÖMA’s development process by systematically applying the system engineering methodology. This approach has not only minimised development risks associated with costs and timelines but has crucially enhanced the predictability and likelihood of obtaining necessary approvals from authorities.

 

          

3rd party assessment of exterior camera installation

Customer: MTR Tech, Sweden

Project tasks

  • Assessment of proposed and installed solutions of camera installation
  • Highlighting risks and deviations from industry standards and recommendations

Our Approach

MTR has operated and maintained the X60 Coradia fleet on behalf of the Stockholm Region until 2024. The region has ordered installation of cameras from Alstom to support the drivers and improve visibility around the door-area, particularly on platforms with curved tracks.

PROSE has extensive experience in mechanical and electrical design as well as design processes, especially in adhesive bonding. Based on our expertise, an iterative assessment process has taken place to assess the proposed and installed solution. It includes recommendations in line with industry best practice for both mechanical design and bonding – as well as design and processes – in accordance with EN17460.

Customer benefit

​Adding additional equipment to an existing fleet without impacting the basic design requires experience and know-how about production methods and the original design. With PROSE as an independent assessor, the client received an independent assessment of the proposed and installed solution as well as the identification of potential short- and long-term risks in the proposed design of both the bonded joints and the mechanical parts.

 

      

Corrosion repair

Project tasks

  • Creating a CAD model of the carbody from a set of drawings
  • Creation of an FE model of the carbody
  • Strength assessment of the condition without corrosion
  • Consideration of corrosion damage in the calculation model
  • Analysis and determination of minimum wall thicknesses
  • Specification of measures for corrosion repair
  • Preparation of drawings to document the repair solution

Our Approach

Corrosion damage to the lower structure of the carbody was discovered during the planning of conversion measures on dining carriages. The wagons are welded steel constructions from 1990 and due to the advanced age of the vehicles, the operator did not have any CAD models or strength documents. PROSE was commissioned to assess the utilisation of the carbody in terms of strength. First in their original, corrosion-free state and then considering the identified corrosion damage. Additionally, we were asked to develop solutions to prolong the service life of the vehicles.

In a first step, a CAD model was created from the set of drawings. This model then served as the basis for creating the Finite Element (FE) model, which embodies the target condition of the carbody structure. A subsequent strength analysis then showed how many theoretical reserves the structure still had.

In the next step, the FE model was updated to include corroded areas, and the calculations were repeated. In this way, the effect of corrosion on the structural strength of the carbody could be determined and evaluated.

Using an iterative approach, a maximum corrosion depth could be determined for the damaged areas. For areas where it was foreseeable that the corrosion would penetrate too deeply, repair solutions were also developed, which included welding in new profiles, and their strength was verified.

Customer benefit

Thanks to PROSE’s work, the customer now has access to a CAD model of the carbody. The strength analysis has enabled the determination of minimum wall thicknesses for vehicle areas typically affected by corrosion, which the customer can use to evaluate the extent of corrosion damage. For areas where corrosion has penetrated too deeply, the customer now possesses localised repair solutions. This can significantly extend the service life of the vehicles.

 

          

Vehicle Authorisation

Customer: various customers

Project tasks

  • Carrying out requirements capture and preparing the safety evaluation, including risk analysis
  • Preparation and management of evidence documents
  • Cooperation and coordination of NoBo, DeBo and AsBo
  • Support in preparing several declarations and dealing with online registers like ERATV or ERADIS
  • Management of the change notification to the ERA or national safety authorities like EBA for changes not requiring an authorisation
  • Management of authorisation applications via One Stop Shop to the ERA for changes requiring authorisation
  • Coordination with the ERA and national safety authority

Our Approach

Vehicle operators or leasing companies make changes to their vehicles for very different reasons, e.g. for obsolescence reasons or to offer passengers a better service by customising the interior and adding features such as sockets or WLAN. In addition to providing engineering services, PROSE supports such projects by taking over the entire approval management process, including communication with all the bodies and authorities involved.

The authorisation process ensures safe rail transport and the best possible interoperability throughout the EU. However, implementing changes to rolling stock presents a significant challenge to operators, keepers, and owners.

At PROSE, we recognise that each railway vehicle is unique. Our team of experts develops vehicle authorisation strategies that address the specific challenges of our customer’s products and needs. From Requirements Capture to One Stop Shop, our experts have the knowledge to guide you through the process. Whether you only need assistance with a single task or are looking for a complete solution, we can provide solutions to meet your particular requirements.

Customer benefit

Modernisations and retrofits guarantee enhanced reliability and superior passenger comfort and open up new applications by integrating new systems. Whilst operators and workshops can focus on their primary tasks, PROSE can handle all the “paperwork” from the engineering and the preparation of evidence documents to the assessment and authorisation phases with bodies and authorities involved. Due to our comprehensive service portfolio, we help reduce interfaces and effort because all services are coordinated and come from a single source.

PROSE ensures that our customers’ railway vehicles comply with the latest standards and regulations. From document preparation to submission, we make sure that vehicle approval hurdles don’t derail your success.

 

      

Delivery of four dummy bogies

Project tasks

  • Project management
  • Manufacture

Our Approach

PROSE was commissioned to develop and manufacture four customised dummy bogies for the depot. The main challenge was to design robust bogies suitable for use in the demanding conditions of a workshop environment. These bogies not only need to have a high load capacity but also have to offer flexible adaptability to different vehicle types and maintenance requirements of the depot. The manufacturing process required carefully selecting materials and technologies that ensure long-term durability and resistance to mechanical stresses and environmental influences. In addition, special attention was paid to ergonomics and user-friendliness to ensure the safety of depot employees and increase the efficiency of maintenance processes. The technical specifications were worked out in detail in close cooperation with the customer to ensure that the finished bogies are optimally adapted to the depot’s specific requirements and existing infrastructure.

PROSE tackled this task with a focused approach to quality and functionality. The four dummy-bogies were manufactured under strict quality control and using high-quality materials. Each bogie was carefully designed to meet the specific requirements of the depot, with particular attention paid to durability and ease of maintenance. The noise reduction target of >1dB set at the beginning of the project was successfully achieved with a theoretical analysis.

Customer benefit

​The provision of these four customised dummy-bogies offers the customer considerable advantages. Thanks to the improved reliability and robustness of the bogies, maintenance work can be carried out more efficiently and safely. This leads to a significant reduction in downtime and an increase in operational safety in the depot. The customised bogies, therefore, not only support daily routines but also help to improve the service life and performance of the vehicles maintained in the depot.

 

   

Gearbox investigation on vehicles

Project tasks

  • Project management
  • Create a feasibility study
  • Test proposals based on the preliminary study
  • Evaluation from tests
  • Recommendations

Our Approach

The feasibility study involved testing the sealing proposals recommended by PROSE on two different gearboxes of the vehicle. One gearbox was found to have a minor leakage, while the second gearbox showed similar levels of leakage as before, despite the use of a sealing compound and a regular O-seal. These tests helped to evaluate the effectiveness of the various proposed sealing methods and provided valuable data for the further development of the solutions.

Customer benefit

​Based on the results of the tests, PROSE can now make specific recommendations for further steps. PROSE, therefore, recommends that the next step is to test the X-seal and simultaneously apply two lines of sealant to the motor output shaft. This recommendation is based on the observed performance of the tested seal variants and aims to develop a more robust solution to prevent oil leakage. This strategic approach allows the customer to make targeted adjustments and improvements to resolve the problem in the long term and improve the operational reliability and service life of the gearbox.

 

    

Expert opinion on carbody structures

Project tasks

Verification of

  • Design Concept and Philosophy
  • Carbody calculation specification
  • Carbody crash specification
  • Validation plan
  • Finite element descriptive document
  • Calculation results
  • Weldings

Our Approach

PROSE supported the established European rail vehicle manufacturer with reviews to ensure that the development of its carbody structures complies with all requirements (safety, durability, strength/rigidity) specified in the standards and is supplemented by customer requirements.

Two essential characteristics of carbody structure are crashworthiness and fatigue strength. To check these properties, design principles and calculation methods must be evaluated.

The evaluation focused on the customer’s stress report, which PROSE carefully checked. In addition to evidence of carbody straining by standardised loads, evidence of results from load scenarios in the end customer’s country is required. Such load scenarios are not directly defined in a standard but must be analysed. As this task is more complex, PROSE scrutinised this part of the report with particular attention.

Customer benefit

PROSE helped ensure the development of a cutting-edge aluminium carbody structure. The customer and the end customer highly valued its independent expert opinion as quality assurance.

With PROSE as an independent assessor, the customers had a further means of reducing design risks by using the expertise of PROSE’s seasoned engineers.

 

  

Inspection and assessment of carbody, cracks and corrosion

Project tasks

  • Project management
  • Planning of the project
  • Inspections
  • Establishing an assessment report

Our Approach

As part of the project implementation, PROSE AB carried out thorough inspections on all 9 X60A vehicles to ensure their structural integrity. This was carried out with visual inspections of the vehicle frames and bodies to identify visible damage. This meticulous approach made it possible to precisely document every potential weak point, which allowed targeted planning for necessary repair work. Through the comprehensive inspection and documentation, PROSE AB ensured that all vehicles’ safety and quality requirements were met, improving their operational safety and longevity.

Customer benefit

​By providing nine detailed inspection reports, one for each vehicle, the customer benefited from a comprehensive and accurate overview of the condition of their vehicle fleet. The individual reports provide an accurate assessment of each vehicle’s condition and maintenance needs. This structured and detailed documentation enables the customer to make informed decisions about necessary maintenance and repair measures, helps to optimise operational safety and supports effective resource planning. The reporting thus increases transparency and facilitates strategic planning for the long-term maintenance of the vehicle fleet.

 

     

Welding drawings and calculations for repairing Magnetic Brakes

Project tasks

  • Scanning of specific parts
  • Drafting welding drawings
  • Performing design calculations
  • Clarifying questions about the deformed magnetic brake
  • Project management

Our Approach

PROSE used precise scans of the magnetic rail brakes to create customised welding drawings and detailed documentation for their repair. This work included the development of technical drawings and calculation documents tailored to the specific requirements of the brakes. Our approach ensured that the repairs met the highest safety standards and could be carried out efficiently. By providing comprehensive guidance for the welding work, we ensured our customer could perform the necessary repairs accurately. Our commitment to quality and technical excellence enabled a sustainable solution to restore the functionality and safety of the magnetic rail brakes.

Customer benefit

With the welding drawings supplied by PROSE, the customer is now able to repair deformations on magnetic rail brakes accurately and efficiently. These customised drawings enable the customer’s team to carry out accurate repairs that restore the brakes’ performance and safety. The direct benefits to the customer include significantly reduced downtime, cost savings through in-house repair capability, and extending the life of critical brake system components. These customised solutions ensure that the magnetic brakes maintain their essential function in the safety and efficiency of rail transport.

 

Fire Safety Assessment and Consulting

Project tasks

  • Consultancy
  • Development and creation of fire protection concepts
  • Development and creation of evacuation concepts
  • Analyses of fire protection requirements
  • Compilation of required fire protection test reports
  • Communication with authorities, manufacturers and testing laboratories
  • Integration of fire safety systems
  • Preparation of approval documents relevant to fire protection

Our Approach

PROSE analyses the given situation and develops solutions that meet the applicable fire protection requirements. To this end, PROSE advises the customer and identifies various solutions in order to find an efficient way of achieving the required fire protection for railway vehicles in accordance with EN 45545. Our experts calculate the thermal load of the vehicle during the design and propose measures for its reduction.

Customer benefit

The customer benefits from our many years of experience in the field of fire protection for all types of rail vehicles in accordance with EN 45545, including not only advice but also the creation of concepts, the preparation of the necessary fire protection certificates, contact with manufacturers of fire protection-compliant components and communication with approval authorities. The aim is to place fire protection suitable vehicles into service.

Vehicle procurement – Manufacturing Supervision, Quality Control and Factory Tests

Customer: various customer

Project tasks

  • Acceptance of the welded car bodies / bogie frames
  • Paint inspection and acceptance
  • Intermediate acceptance of main electrical components
  • Intermediate acceptance of interior fittings
  • Factory acceptance/customer acceptance

Our Approach

By regular participation in the vehicle acceptance tests and constant coordination with the team of the vehicle manufacturer, PROSE checks the quality of the production. The customer is permanently kept up to date by the acceptance team regarding the progress of the production as well as possible complications or deadline postponements. He immediately receives the results of the production controls and acceptances and can follow up changes, modifications etc.

The dates for the acceptance of components, intermediate assembly stands and vehicles ready for delivery follow the production plan but are also handled operationally and flexibly in order to be able to react to specific occasions. In this way, control of the construction process is always ensured and there is the possibility of intervention in the event of difficulties such as quality slumps, scheduling, supply, or capacity problems.

Customer benefit

With manufacturing supervision, the manufacturer’s quality assurance process is checked and monitored in addition to the product quality, because every vehicle has gone through this process before it is presented for factory acceptance. Continuous construction supervision ensures consistent quality at a high level.

      

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