In the numerical simulation of relieving residual stress by hammer peening, contact element technique was firstly adopted for establishing the finite model and calculating the hammer peening.

首次在锤击消除焊接应力的数值模拟研究中，采用接触单元技术建立有限元模型模拟计算锤击作用。

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Finally, the parametric simulation program was designed with ANSYS APDL language, various simulation of welding and hammer peening can be analysed through defining different parameters.

最后，利用APDL语言编制了具有一定通用性的参数化模拟分析程序，通过改变模拟参数可以模拟分析不同条件下的焊接与锤击处理。

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First, Mr. Cooper gave him a lesson in sharpening (it's done by peening with a hammer and anvil never by grinding).

WSJ: Who Needs a WeedWacker When You Can Use a Scythe?