27-66 STUDIUL COMPORTĂRII SUB SARCINĂ STATICĂ ȘI DINAMICĂ A GRINZII PRINCIPALE (profil I) A MACARALEI PORTAL (MACARA CAPRĂ) PARTEA I – STAREA DE DEFORMAȚIE A GRINZII PRINCIPALE SUB SARCINĂ APLICATĂ STATIC


THE STUDY OF THE BEHAVIOR UNDER STATIC AND DINAMIC LOAD OF THE MAIN BEAM (PROFILE „I”) OF A PORTAL CRANE (GANTRY CRANE)
PART I – THE STATE OF DEFORMATION OF THE MAIN BEAM UNDER STATIC LOAD
Because of the specific nature of the cranes’ activities, these ones have to accomplish a lot of norms concerning the security and labour protection. At the working beginning but also recurrently, the cranes are subjected to a test set in order to check the technical state with a view to the authorization. The verifications are performed by specializes departments and involve the following steps: ▪ the check of the main elements; ▪ tests of loads; ▪ tests under static and dynamic load; ▪ other tests which have in view the whole behavior of the crane.
With a view to the authorization all the tests are compulsory but the present paper presents the analysis of the main beam under the action of external loads. In the current activity one established that the imposed check in order to authorize the cranes are necessary but not enough to ensure those working safety. The present paper makes an important analysis of the main beam: the state of stress and deformation under static and dynamic load.
Keywords: portal crane, force, deflection, acquisition system, transducers
Cuvinte cheie: macara portal, forță, săgeată, sistem de achiziție, traductoare

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