DEVELOPMENT OF CRITERIA FOR QUALIFICATION VIBRATION OF MECHANICAL COMPONENTS THROUGH SOFTWARE LMS TEST.LAB MISSION SYNTHESIS Mission Synthesis is a module of LMS.Test.Lab. Its purpose is to provide a formulation of technical specifications for industrial applications, following the “test tailoring” strategy [1]. This methodology is based on field acquisitions of time histories, at specific points of measurement, enough large and representative of the vibration level of the component, so as to be indicative of the device stress state during its real operation condition. The methodology produces the Maximum Response Spectrum and Fatigue Damage Spectrum which represent the potential damage respectively in terms of tensile strength and fatigue. Then there is the formulation of a specification through the definition of the vibration profile which will have to be reproduced by the shaker in order to stress the component mounted on the shaker. The synthesis process can be carried out arranging an appropriate time reduction for the test with the shaker, in order to easily simulate (introducing criteria to define the equivalence of the damage) longer times of the component, under the real operating conditions. This article suggests a significant application of the Mission Synthesis procedure for an automotive case. The profiles of PSD made possible to simulate with a relatively short (6-8h) laboratory test the reliability of the component in relation to its use for durations equal to the average life of a land vehicle.
Qualifica a vibrazione di componenti meccanici - Development of criteria for qualification vibration of mechanical components through software Lms Test.Lab Mission Synthesis
LUCIFREDI, ALERAMO;SILVESTRI, PAOLO;
2010-01-01
Abstract
DEVELOPMENT OF CRITERIA FOR QUALIFICATION VIBRATION OF MECHANICAL COMPONENTS THROUGH SOFTWARE LMS TEST.LAB MISSION SYNTHESIS Mission Synthesis is a module of LMS.Test.Lab. Its purpose is to provide a formulation of technical specifications for industrial applications, following the “test tailoring” strategy [1]. This methodology is based on field acquisitions of time histories, at specific points of measurement, enough large and representative of the vibration level of the component, so as to be indicative of the device stress state during its real operation condition. The methodology produces the Maximum Response Spectrum and Fatigue Damage Spectrum which represent the potential damage respectively in terms of tensile strength and fatigue. Then there is the formulation of a specification through the definition of the vibration profile which will have to be reproduced by the shaker in order to stress the component mounted on the shaker. The synthesis process can be carried out arranging an appropriate time reduction for the test with the shaker, in order to easily simulate (introducing criteria to define the equivalence of the damage) longer times of the component, under the real operating conditions. This article suggests a significant application of the Mission Synthesis procedure for an automotive case. The profiles of PSD made possible to simulate with a relatively short (6-8h) laboratory test the reliability of the component in relation to its use for durations equal to the average life of a land vehicle.
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