Application of Risk Assessment to Design of Interior Modules of Rolling Stocks
Shinsuke SAKAI, Satoshi IZUMI, Takashi YOKOYAMA and Toshiaki MAKINO
Abstract:In the design of railroad train, main interests have been placed on stiffness, mass and strength. Therefore, great improvement has been achieved in functional point of view. For further development, however, it is necessary to provide a procedure for the decision-making in design process. For example, if design change such as geometry variation or material replacement occurs, it is required to evaluate the validity of the action. For this purpose, a rational procedure to assist the decision-making is needed. However, the research from this point of view has not been done sufficiently so far. In this paper, we attach importance to the decision-making performance in risk assessment. Though conventional risk assessment is used in the operational stage such as maintenance or inspection, it is investigated to apply the risk assessment in the design stage of railroad train. Specifically, the design of ceiling-shelf module is considered. By introducing the risk evaluation, not only the evaluation of function of single part but also the total performance for safety can easily be treated. Besides, uncertainty property is also able to be included in the assessment. After the formulation of risk assessment is stated, the application for several decision-making in ceiling-shelf module will be shown. Key Words:Risk assessment, Interior module, Sleeve-caulking fastening method, Decision-making, Design optimization