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本文利用瑞利波和体波所建立的基本理论,研究了动力机械所引起的地面振动衰减,提出了衰减计算公式。这个公式对动力机械所引起的地面振动,不仅考虑了瑞利波而且考虑了体波,与弹性半空间波动理论解吻合。文中提出了便于计算的土壤衰减系数。所建立的关系式与现场测得的许多地面振动资料符合,比仅考虑面波的波尼茨(Bornitz)公式精度高。本文的衰减公式,已列入我国国家标准《动力机器基础设计规范》GBJ40—79.
In this paper, the basic theory established by Rayleigh waves and body waves is used to study the attenuation of ground vibration caused by power machinery, and the attenuation calculation formula is proposed. This formula not only considers Rayleigh waves but also considers body waves for the ground vibrations caused by power machinery, and is consistent with the elastic half-space wave theory. The soil attenuation coefficient is calculated conveniently in this paper. The established relationship is in agreement with many ground vibration data measured in the field, and is more accurate than the Bornitz formula which only considers surface waves. The attenuation formula of this paper has been listed in the National Standard of China for the Design of Power Machine Basics GBJ40-79.