Enhancing Joint Parameter Identification with Sub Structure Synthesis Theory: A Non-linear Perspective
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Abstract
Engineering structures that undergo fluctuating loads frequently exhibit structural nonlinearity. In a general perspective, linear concept can be utilized to partially analyze nonlinear systems, but in bolted joint structures non-linearity has to be considered for defining the joint behavior. The current research work provides a mathematical model for the parametric identification of non-linear structural elements. The frequency equation is derived using the idea of sub-structure synthesis with both non-linear and linear stiffness characteristics. The generated equation is further utilized in inverse analysis to estimate a non-linear parameter. The present work is numerically analyzed using a cantilever beam with a non-linear boundary condition. The method provides précised approximations for a broad range of non-linear stiffness values. The work concludes less than 10% of error between the developed mathematical model and experimentation.
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