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Finite Difference Method for Solving Differential Equations
Chapter Finite Difference Method for Ordinary Differential Equations After reading this chapter, you should be able to 1. Understand what the Finite Difference Method is and how to use it to solve problems. What is the Finite Difference Method ? The Finite Difference Method is used to solve ordinary Differential Equations that have conditions imposed on the boundary rather than at the initial point. These problems are called boundary-value problems. In this chapter, we solve second-order ordinary Differential Equations of the form bxayyxfdxyd =),',,(22, (1) with boundary conditions ayay=)( and byby=)( (2) Many academics refer to boundary value problems as position-dependent and initial value problems as time-dependent. That is not necessarily the case as illustrated by the following examples. The Differential equation that governs the deflection y of a simply supported beam under uniformly distributed load (Figure 1) is given by EIxLqxdxyd2)(22 = (3) where =xlocation along the beam (in) =EYoung s modulus of elasticity of the beam (psi) =Isecond moment of area (in4) =quniform loading intensity (lb/in) =Llength of beam (in) The conditions imposed to solve the Differential equation are 0)0(==xy (4) 0)(==Lxy Clearly, these are boundary val
08.07.1 . Chapter 08.07 Finite Difference Method for Ordinary Differential Equations . After reading this chapter, you should be able to . 1. Understand what the finite difference method is and how to use it to solve problems.
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