To improve the treatment efficiency of essential boundary condition in mesh-less methods,a simple and robust method is proposed in this paper.Rising weight of nodes in the construction of trail function,specified for essential boundary condition,can make the trail function pass through these nodes.And then,the trail function can satisfy the essential boundary condition previously by setting diagonal element to 1 or multiplying diagonal element by a big number in FEM.The MLS method is adopted to validate this method,and it is proved that this method is costless and robust in most of mesh-less methods.
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