Numerical and Experimental Study on Propagation Attenuation of Leakage Vibration Acceleration Signal of the Buried Water Pipe

For detecting water pipeline leakage signals, in the past people preferred to use sensors obtain signal and then various means methods remove noise increase positioning accuracy. However, as is generated, it spreads along wrapped soil. In this process, will change significantly, eventually becoming very different from original signal. As such, detection accuracy decline, distance becomes longer. Despite this, few researchers have considered distortion caused by propagation whole process instead distorted characteristics for positioning. This direction needs be further studied. paper, acceleration of vibration taken research object using a combination tests numerical simulation. The signals source are collected simulated at distances. reliability simulation model verified inversion theory, influence soil with elastic modulus on expanded. Research findings: (a) attenuation pipeline, around about 3.3 times its compression modulus, which closer actual situation. (b) amplitude conforms an exponential function. higher soil, stronger attenuation. (c) has absorption capacities components, high-frequency part attenuates faster. (d) group velocity 929 m/s, affect