摘要
分析了弹性区域中应力传播的波动方程,说明该应力传播过程可以使用线性系统模型进行描述。根据系统辨识领域的脉冲响应方法,建立了应力测点的脉冲序列与源函数和响应序列之间的关系。在此基础上,建立了各测点间应力序列之间的关联响应模型,给出了采用神经网络的自适应优化方法求解关联参数的方法,并采用某次黄土介质中化学爆炸的实验数据进行了验证。将该模型用于测点数据的预测,预测值和实测值之间的误差很小。这表明,各测点间存在与测量数据无关的客观联系,仅由实验中爆炸源、测点位置和地介质力学参数分布等所决定。
Equations of motion were analyzed for governing underground explosion-induced stress waves spreading in an elastic domain to explain that this stress wave transmission processes could be described by a time-independent linear system model.According to the impulse response methods in the system identification field,the relationships were established to link the impulse series and source functions in the measured points with the response series.Based on the established relationships,a response model was developed to depict the relevancy between the stress series in the measured points.And a method was introduced to calculate the relevant parameters by adopting the adaptive optimization method of neural network and some important parameters were listed.The relevant response model was validated by the experimental data for a certain chemical explosion in soil.The predictions by the relevant response model are in agreement with the measured data and the relevancy between different measured points is determined only by the distributions of the explosion source,measured points and geological parameters.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2009年第5期486-491,共6页
Explosion and Shock Waves
关键词
爆炸力学
关联响应模型
脉冲响应
化学爆炸
应力波
mechanics of explosion
relevant response model
impulse response
chemical explosion
stress wave
