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中文摘要：
采用积分变换方法，并利用两类积分公式克服反变换求解的困难，求得了区域脉冲载荷下一个二维Lamb问题的代数形式的精确解．基于该分段函数形式的代数结果，纵波、横波、Rayleigh波等应力波成分在弹性表面的激发和传播过程得到详尽分析，其中很多结论是已有的解析积分结果或者数值计算结果不曾得到的．
英文摘要：
Applying integral transform method and the corresponding inverse transformation based upon two types of integration, the present paper successfully obtains an exact algebraic solution for a two-dimensional Lamb＇s problem due to a strip impulse loading. With the algebraic result in form of piecewise function expressions, the excitation and propagation processes of stress waves, including the longitudinal wave, the transverse wave, and Rayleigh-wave, are discussed in detail. A few new conclusions, which have never been drawn before from the existing integral results or computational results of this problem, are given finally.
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