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Wyznaczenie charakterystyk eksploatacyjnych fundamentowych złączy śrubowych z podkładką stalową i odlaną z tworzywa

Grudziński P.

Przegląd Mechaniczny

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2016

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nr 9

34--39

PL

Zasadniczym celem badań, przedstawionych w pracy, było wyznaczenie charakterystyk obciążeń i odkształceń dotyczących stanu eksploatacyjnego dla przyjętych modeli fundamentowych złączy śrubowych, z tradycyjnie stosowaną podkładką stalową oraz z podkładką nowoczesną - odlaną z tworzywa. Badane układy nie spełniały warunku osiowej symetrii, przyjmowanej powszechnie w modelowaniu i analizie pojedynczych złączy śrubowych. Złącze fundamentowe poddane było obciążeniom eksploatacyjnym statycznym i dynamicznym. Badania wykazały, że wyznaczone charakterystyki eksploatacyjne różnią się w istotny sposób od ich charakterystyk montażowych.

EN

The paper concerns the modeling, calculations and experimental studies of the foundation bolted joints of heavy machines and devices seated on foundations. The characteristics of the loads and deformations for the bolt and the joined components determined by operating loads have been presented. The characteristics determined from the calculations are compared with those of the respectively designated experimentally Significant differences in the results have been shown. Conclusions important for engineering practice have been formulated.

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Determination of joint diagrams for a foundation bolted joint with the bolt anchored in a polymer plastic. Part II. Joint diagram for the operational state

Grudziński P.

Archives of Mechanical Technology and Automation

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2012

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Vol. 32, no. 3

49--57

EN

The paper presents an unconventional method of determining joint diagrams for foundation bolted joints of heavy machinery and equipment, with bolts anchored in a concrete block using special polymer material EPY. It includes a continuation and development of the problems discussed in Part I, which shows the specificity of these joints that distinguishes them from conventional bolted joints. It also shows a way of determining a joint diagram for an assembly state of these joints. Part II of this elaboration is devoted to the determination of a joint diagram for the examined bolted joint under operating conditions. This joint diagram is different from that designated for the assembly state. It has been obtained on the basis of many separate numerical calculations, performed with ANSYS FEM system. A practical way of using this diagram is also shown, and finally conclusions of cognitive and practical meaning were formulated.

3

Determination of joint diagrams for a foundation bolted joint with the bolt anchored in a polymer plastic. Part I. Joint diagram for the assembly state

Grudziński P.

Archives of Mechanical Technology and Automation

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2012

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Vol. 32, no. 3

35--47

EN

The paper concerns problems of modeling and calculation of modern foundation bolted joints of heavy machinery and technical equipment, generating large dynamic forces. A significant progress in this area has been made by the development and application of special polymer materials for anchoring the bolts and for foundation chocks. The modern bolted joints form complex mechanical systems, made of steel, plastic and concrete. The paper discusses the specificity of these joints. It has been shown that the conventional methods and formulas, known from the subject literature and engineering practice cannot be used for their calculations. A method of how to model and calculate such joints has been presented, using for this purpose the FEM. The entire elaboration consists of two parts. Part I describes how to determine the basic joint diagram for the assembly state of the joint, and Part II - how to determine the joint diagram for the operational state of the joint, and its scientific and practical importance.