Structural Sensitivity Analysis in Eigenvalue Problems Using Finite Strip Method

1994 ◽  
Author(s):  
Andrzej Garstecki ◽  
Witold Kakol
Keyword(s):  
Sensitivity Analysis ◽  
Eigenvalue Problems ◽  
Structural Sensitivity ◽  
Finite Strip ◽  
Strip Method ◽  
Thin Walled Structures ◽  
Finite Strip Method ◽  
Structural Sensitivity Analysis ◽  
Thin Walled ◽  
Methods Numerical

Abstract Structural Sensitivity Analysis is performed using the direct differentiation method for buckling and free vibration problems of prismatic thin-walled structures employing the Finite Strip Method. The sensitivity of eigenvalues (critical stresses and free frequencies) with respect to variation of thickness of plate members and with respect to shape-type variations is considered. The differentiation is carried out employing analytical and semi-analytical methods. Numerical examples illustrate the sensitivity of thin-walled plates stiffened with ribs and thin-walled beams. The examples also serve for discussion of numerical efficiency and accuracy of the presented methods.

scholarly journals Determination of bearing capacity of steel thinwalled cold-formed structures using the example of centrally compressed struts

2019 ◽  
Vol 135 ◽  
pp. 03016
Author(s):  
Olga Umnova ◽  
Irina Giyasova
Keyword(s):  
Bearing Capacity ◽  
Direct Method ◽  
Finite Strip ◽  
Regulatory Documents ◽  
Strip Method ◽  
Minimum Value ◽  
Thin Walled Structures ◽  
Finite Strip Method ◽  
Thin Walled

Until 2017, there were no regulatory documents in Russia that allowed calculations of light steel thin-walled structures (LSTWSs), which hampered their use in construction. The paper compares various methods of calculating LSTWSs in compliance with Russian, European and American standards, and describes their features. The direct method of finding the strength of steel thin-walled profiles, developed by American scientists B. Schafer and T. Pekoz, is described. The method is based on the determination of the bearing capacity of a section according to the results of calculating critical forces for three forms of buckling. Using the CUFSM program developed by B. Schafer on the basis of the finite strip method, a centrally compressed strut from LSTWS was calculated; critical forces of three forms of buckling were determined, and profile bearing capacity was determined as the minimum value of three.

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