The Experts below are selected from a list of 551118 Experts worldwide ranked by ideXlab platform

Paul Sas - One of the best experts on this subject based on the ideXlab platform.

  • vibro acoustic analysis procedures for the evaluation of the sound insulation characteristics of agricultural machinery cabins
    2003
    Co-Authors: Wim Desmet, Bert Pluymers, Paul Sas
    Abstract:

    Abstract Over the last few years, customer demands regarding acoustic performance, along with the tightening of legal regulations on noise emission levels and human exposure to noise, have made the noise and vibration properties into important Design criteria for agricultural machinery cabins. In this framework, both experimental analysis procedures for prototype testing as well as reliable numerical prediction tools for early Design Assessment are compulsory for an efficient optimization of the cabin noise and vibration comfort. This paper discusses several numerical approaches, which are based on the finite element and boundary element method, in terms of their practical use for airborne sound insulation predictions. To illustrate the efficiency and reliability of the various vibro-acoustic analysis procedures, the numerical procedures are applied for the case of a harvester driver's cabin and validated with experimental results.

  • vibro acoustic analysis procedures for the evaluation of the sound insulation characteristics of agricultural machinery cabins
    2001
    Co-Authors: Wim Desmet, Bert Pluymers, Paul Sas
    Abstract:

    Over the last few years, customer demands regarding acoustic performance, along with the tightening of legal regulations on noise emission levels and human exposure to noise, have made the noise and vibration properties into important Design criteria for agricultural machinery cabins. In this framework, both experimental analysis procedures for prototype testing as well as reliable numerical prediction tools for early Design Assessment are compulsory for an efficient optimisation of the cabin noise and vibration comfort. This paper describes an experimental procedure for the in-situ Assessment of the air-borne sound insulation characteristics of a cabin using a two-microphone sound intensity probe. In addition, several numerical approaches, which are based on the finite-element and boundary element method, are discussed in terms of their practical use for air-borne sound insulation predictions. To illustrate the efficiency and reliability of the various vibro-acoustic analysis procedures, all experimental and numerical procedures are applied and evaluated for the case of a cabin scale model.

Wim Desmet - One of the best experts on this subject based on the ideXlab platform.

  • vibro acoustic analysis procedures for the evaluation of the sound insulation characteristics of agricultural machinery cabins
    2003
    Co-Authors: Wim Desmet, Bert Pluymers, Paul Sas
    Abstract:

    Abstract Over the last few years, customer demands regarding acoustic performance, along with the tightening of legal regulations on noise emission levels and human exposure to noise, have made the noise and vibration properties into important Design criteria for agricultural machinery cabins. In this framework, both experimental analysis procedures for prototype testing as well as reliable numerical prediction tools for early Design Assessment are compulsory for an efficient optimization of the cabin noise and vibration comfort. This paper discusses several numerical approaches, which are based on the finite element and boundary element method, in terms of their practical use for airborne sound insulation predictions. To illustrate the efficiency and reliability of the various vibro-acoustic analysis procedures, the numerical procedures are applied for the case of a harvester driver's cabin and validated with experimental results.

  • vibro acoustic analysis procedures for the evaluation of the sound insulation characteristics of agricultural machinery cabins
    2001
    Co-Authors: Wim Desmet, Bert Pluymers, Paul Sas
    Abstract:

    Over the last few years, customer demands regarding acoustic performance, along with the tightening of legal regulations on noise emission levels and human exposure to noise, have made the noise and vibration properties into important Design criteria for agricultural machinery cabins. In this framework, both experimental analysis procedures for prototype testing as well as reliable numerical prediction tools for early Design Assessment are compulsory for an efficient optimisation of the cabin noise and vibration comfort. This paper describes an experimental procedure for the in-situ Assessment of the air-borne sound insulation characteristics of a cabin using a two-microphone sound intensity probe. In addition, several numerical approaches, which are based on the finite-element and boundary element method, are discussed in terms of their practical use for air-borne sound insulation predictions. To illustrate the efficiency and reliability of the various vibro-acoustic analysis procedures, all experimental and numerical procedures are applied and evaluated for the case of a cabin scale model.

Fulvio Parisi - One of the best experts on this subject based on the ideXlab platform.

  • risk targeted safety distance of reinforced concrete buildings from natural gas transmission pipelines
    2016
    Co-Authors: Paola Russo, Fulvio Parisi
    Abstract:

    Abstract Natural-gas pipeline accidents mostly result in major damage even to buildings located far away. Therefore, proper safety distances should be observed in land use planning to ensure target safety levels for both existing and new buildings. In this paper, a quantitative risk Assessment procedure is presented for the estimation of the annual probability of direct structural damage to reinforced concrete buildings associated with high-pressure natural-gas pipeline explosions. The procedure is based on Monte Carlo simulation and takes into account physical features of blast generation and propagation, as well as damage to reinforced concrete columns. The natural-gas jet release process and the flammable cloud size are estimated through SLAB one-dimensional integral model incorporating a release rate model. The explosion effects are evaluated by a Multi-Energy Method. Damage to reinforced concrete columns is predicted by means of pressure–impulse diagrams. The conditional probability of damage was estimated at multiple pressure–impulse levels, allowing blast fragility surfaces to be derived at different performance limit states. Finally, blast risk was evaluated and allowed the estimation of minimum pipeline-to-building safety distances for risk-informed urban planning. The probabilistic procedure presented herein may be used for performance-based Design/Assessment of buildings and to define the path of new natural-gas pipeline networks.

  • blast fragility and performance based pressure impulse diagrams of european reinforced concrete columns
    2015
    Co-Authors: Fulvio Parisi
    Abstract:

    Abstract Terrorist attacks and accidental explosions can induce abnormal loads on building structures, producing local damage to single primary components or even progressive collapse. Few probabilistic investigations have been carried out to assess the risk of blast damage to structural components and progressive collapse. This study aims at evaluating the blast fragility of reinforced concrete columns for two classes of European residential buildings: those Designed only for gravity loads according to past codes and those Designed for earthquake resistance according to Eurocode 8. After uncertainty in material strengths, column dimensions, reinforcement ratios and blast capacity model was characterised, Monte Carlo simulation was performed. Blast capacity was defined through pressure–impulse equations that establish a relationship between the dynamic nature of blast load and damage. The output was the derivation of blast fragility surfaces and probabilistic pressure–impulse diagrams at multiple limit states which may be used for quantitative risk analysis and performance-based Design/Assessment.

Di Gironimo Giuseppe - One of the best experts on this subject based on the ideXlab platform.

  • Vacuum vessel Upper Port Design Assessment of the European DEMO
    2019
    Co-Authors: Mozzillo Rocco, Bachmann Christian, Roccella Massimo, Di Gironimo Giuseppe
    Abstract:

    The present work focuses on the Design Assessment of the DEMO Upper Port. The size of the upper port is defined by the available space in between the toroidal field coils and the required space to integrate a thermal shield between the vacuum vessel (VV) port and the coils. Since the large breeding blanket (BB) segments will require periodic replacement via the upper vertical ports the space inside the upper port needs to be maximized. For this reason the optimization and verification of the upper port Design is a critical aspect in the development of DEMO project. The work here presented investigates the possibility to have an upper port with single walled sidewalls to increase the space available inside the port for the integration of pipe work and to allow the handling of the BB segments. The work carried out evaluates the feasibility of the Design solution from the structural and thermal point of view verifying the upper port structure against nuclear heating, in-vessel pressure, and electromagnetic loads due to a toroidal field coil fast discharge and plasma disruptions according to nuclear codes. © 2018 Elsevier B.V

Di Gironimo G. - One of the best experts on this subject based on the ideXlab platform.

  • Vacuum vessel Upper Port Design Assessment of the European DEMO
    2019
    Co-Authors: Mozzillo R., Bachmann C., Roccella M., Di Gironimo G.
    Abstract:

    The present work focuses on the Design Assessment of the DEMO Upper Port. The size of the upper port is defined by the available space in between the toroidal field coils and the required space to integrate a thermal shield between the vacuum vessel (VV) port and the coils. Since the large breeding blanket (BB) segments will require periodic replacement via the upper vertical ports the space inside the upper port needs to be maximized. For this reason the optimization and verification of the upper port Design is a critical aspect in the development of DEMO project. The work here presented investigates the possibility to have an upper port with single walled sidewalls to increase the space available inside the port for the integration of pipe work and to allow the handling of the BB segments. The work carried out evaluates the feasibility of the Design solution from the structural and thermal point of view verifying the upper port structure against nuclear heating, in-vessel pressure, and electromagnetic loads due to a toroidal field coil fast discharge and plasma disruptions according to nuclear codes