Explicit dynamic solver using central difference method with example file.
function Result=Central_Difference(Elements,Material,Support,Free,M,C,f,fs)
Input
Elements: a structure containing Elements{i}.DOFs and Elements{i}.Material
where Elements{i}.DOFs=[j k] means element i connect DOF j with k
and Elements{i}.Material=m assign material m to element i
Material: a structure containing material properties for bilinear springs
where Material{m}.k1 is Spring stiffness
Material{m}.x1 is Spring deformation beyond which the stiffness decreases
Material{m}.k2 is Reduced stiffness
Support: a vector of support (Fixed) DOFs of size (nSupport,1)
Free: a vector of free DOFs of size (nFree,1)
M:mass matrix (nFree*nFree)
C:damping matrix (nFree*nFree)
f:external force matrix(nFree,N)
fs: sampling frequency
where N is the length of data points of dynamic force
Output:
Result: is a structure consist of
Result.Displacement: Displacement (nFree*N)
Result.Velocity: Velocity (nFree*N)
Result.Acceleration: Acceleration (nFree*N)
Note: Elements are assumed to be springs connecting nodes with bi-linear stiffness (No hysteresis).
References
Chopra, Anil K. "Dynamics of Structures. Theory and Applications to." Earthquake Engineering (2017).
引用格式
Ayad Al-Rumaithi (2024). Explicit Dynamic Solver (https://www.mathworks.com/matlabcentral/fileexchange/73663-explicit-dynamic-solver), MATLAB Central File Exchange. 检索来源 .
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1.0.0 |