摘要
以Shinozuka Sato双指数调幅函数为基础 ,提出了一个爆炸地震加速度幅值的包络函数模型。根据爆炸地震的特点 ,建立了与爆炸形式、药量和场地条件相联系的包络函数基本参数关系。分析表明 ,加速度幅值的包络函数是地介质对爆炸作用的均方根加速度响应的等价形式 ,可以用于模拟地震地面运动的时间历程。所提出的应用实例证明了加速度幅值的包络函数是一种更好的爆炸地震运动描述方法。
An envelope function model of ground acceleration amplitude of explosion seism is introduced on the basis of the Shinozuka Sato double exponential modulation function.According to the characteristics of explosion seism,some relations are presented which refer to the principal parameters of the envelope function with blasting type,charge mass and field condition.The analysis shows that the envelope function is a form equivalent to the mean square root response of ground acceleration on an explosion action,and it may be applied to model the time history of ground motion.An application example proves that the envelope function of acceleration is a better method to describe the ground motion of explosion seism.
出处
《工程爆破》
2001年第3期1-4,41,共5页
Engineering Blasting
基金
国家自然科学基金资助项目 (19972 0 13)
