Využitie zaťažovacích spektier v procese návrhu zjednodušených skúšok stavebných strojov

摘要

V systéme hodnotenia kvality výrobku je možné medzi najdôležitejšie vlastnosti zaradiť spoľahlivosť, ktorá stále viac rozhoduje o konkurencieschopnosti a ekonomickej efektívnosti výrobku. Pri dynamicky namáhaných konštrukciách, kde dochádza ku kumulácii únavového poškodenia, sa pod spoľahlivosťou rozumie pre-dovšetkým dosiahnutie predpokladanej životnosti konštrukcie, t. j. jej rozhodujú-cich častí.%In the system of product quality assessments, reliability assessment belongs to the most important ones. One of the reliability criteria is a structural life. In dynamically loaded structures, where it comes to accumulation of fatigue damage, life tests are an important part of new products development. It is inevitable to set effective procedures to verify the machine design even from the point of view of life evaluation. For this purpose, it is necessary to know a load of every structural element in its every kinematic point, as well as service loads in particular working regimes of a building machine. One of the ways to better characterize service load is the determination of load spectrum, i.e. to express cumulative counts and sizes of particular loads. For speeding up a product development stages, it is necessary to develop methods of their testing in such a way that they shorten the time of products testing as much as possible.