Topic
Direct stiffness method
About: Direct stiffness method is a research topic. Over the lifetime, 2584 publications have been published within this topic receiving 53131 citations.
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TL;DR: In this article, the exact vibration frequencies of generally laminated beams are found using a new method, including the effect of rotary inertia and shear deformations. But this method is not suitable for rigid structures.
96 citations
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TL;DR: In this article, a variational formulation is given for the equations of motion for an unconstrained elastic body, and Hamilton's principle is used to derive the equation of motion and deformation of the body.
Abstract: A variational formulation is given for the equations of motion for an unconstrained elastic body, and Hamilton's principle is used to derive the equations of motion and deformation of the body. Finite-element approximations are developed for these dynamical equations with respect to a body axis system satisfying the mean axis conditions. The free-body influence matrix for the body then is developed in terms of the finite-element model parameters.
96 citations
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TL;DR: In this article, a concrete beam of 6 m length is subjected to an increasing static load to produce cracks and the change in modal parameters is then related to damage in the beam.
96 citations
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TL;DR: In this paper, the stiffness analysis of cable-driven parallel robots (CDPRs), including the static stiffness and the dynamic stiffness analyses, is presented. And the important effect of cable mass and elasticity on the static and dynamic stiffness of CDPRs is discussed.
95 citations
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TL;DR: In this paper, the authors developed a new PU-based triangular element using a dual local approximation scheme by treating boundary and interior nodes separately, which is free from the linear dependence problem and essential boundary conditions can be applied directly as in FEM.
94 citations