Efficient regular perturbation solutions for beams subjected to thermal imperfections: a case study

Autor:	B. W. Yeigh, K.-K. Chan
Rok vydání:	2010
Předmět:	Engineering business.industry Stiffness Perturbation (astronomy) Young's modulus Mechanics Structural engineering Moment of inertia symbols.namesake Brute force Thermal symbols medicine medicine.symptom business Eigenvalues and eigenvectors Beam (structure)
Zdroj:	WIT Transactions on The Built Environment.
ISSN:	1743-3509 1746-4498
DOI:	10.2495/hpsm100491
Popis:	A mesh reduction (regular) perturbation technique was developed to overcome inefficient and unviable analytical and “brute force” numerical solutions for structures with imperfections and for imperfection sensitive structures. Using this perturbation technique, a case study is presented to determine the effects of uncontrolled deviations in temperature on the stability of beam on elastic foundation. The study further explores the effects of imperfections on beams for five independent imperfection patterns, namely variability in initial shape, modulus of elasticity, moment of inertia, foundation stiffness, temperature, and their combined effects. The study demonstrates thermal imperfections behave in the same manner as other non-shape imperfections, while shape imperfections appear to be most sensitive. When thermal and shape imperfections were combined, all other imperfections were shown to have diminished effects.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::80d4e8084f74e788f5eb87412126cb07 https://doi.org/10.2495/hpsm100491 Zobrazit plný text záznamu