Patent ID: 8319364
Filing Date: 2012-11-27
Classification: F03D,Y02E

Abstract:
1. A stress analysis device for a wind-turbine structure, comprising: a load-data generating section that generates load time-series data of a predetermined load observation point, set in the wind-turbine structure, on the basis of a parameter related to an operating environment; and a stress analyzing section that generates stress time-series data of at least one target analysis point, set in the wind-turbine structure, on the basis of the load time-series data, wherein the load-data generating section uses a load conversion table corresponding to the target analysis point so as to generate load time-series data to each basic component at the target analysis point from the load time-series data of the load observation point, and wherein the stress analyzing section performs obtaining stress time-series data of each basic component acting on the target analysis point on the basis of the load time-series data of the basic component and a structural response of the basic component when a unit load is acting on the target analysis point, obtaining first principal-stress time-series data indicating a stress value in a principal-stress direction at each time point from the stress time-series data of each basic component, designating the principal-stress direction at a time point corresponding to maximum principal stress in the first principal-stress time-series data as a designated direction, and generating second stress time-series data indicating a stress value in the designated direction at each time point from the stress time-series data of each basic component.