doi: 10.52899/24141437_2025_01_5
UDK: 629.12:539.433

Shear center determination of open light-gauge sections

Андреев А. Н., Николаев Д. А.
Article language: English
Citation Link: Andreev AN, Nikolaev DA. Shear center determination of open light-gauge sections. Transactions of the Saint Petersburg State Marine Technical University. 2025;4(1):5–14. DOI: https://doi.org/10.52899/24141437_2025_01_5

Annotation

BACKGROUND: Import substitution issues are very topical in the domestic machine building industry. Recently, thin-walled curvilinear cross-sections have been obtained in the optimization of design and technological parameters thin-walled curvilinear cross-sections have been recently emphasized in the optimization of structural and technological parameters of power machine elements. The method of calculation of strength characteristics for a thin-walled closed profile is similar to those commonly used for the calculation of solid profiles, but for the calculation of sections with unclosed thin-walled curvilinear profiles it is limitedly applicable, due to the mismatch of the center of torsion with the center of mass of the section area. AIM: To presents some highlights on the strain state of units and parts of various power machines and devices with curved light-gauge open profiles operating in various strain conditions. METHODS: It describes the methodology of the proposed general algorithm for the automated calculation of the basic stiffness parameters of strained curved light-gauge open profiles with the determination of the shear center. It also reviews different options for determining these parameters for light-gauge line profiles and complex light-gauge profiles of components. RESULTS: An experimental setup has been developed that allows to identify the planes of loading determining the shear center at their intersection. It shows experimental data on determining the shear center for a random light-gauge open profile. The data is used to develop the loading plane vs variation of the vertical cross section curves. The developed program is not only an effective tool for design and calculation, but also can be useful for scientific research related to the design of machine and equipment elements. CONCLUSIONS: The author makes a conclusion on the high accuracy of calculations using the developed software by comparing the calculated analytical coordinates with experimental data. The developed program is not only an effective tool for design and calculation, but also can be useful for scientific research related to the design of machine and equipment elements. Keywords: thin-walled curved profile; shear center; strength; stiffness; torsion; section; strain

Bibliography

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