کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1900137 | 1045269 | 2014 | 15 صفحه PDF | دانلود رایگان |
• A half-space interpolated time-domain equivalent source method is presented.
• The method employs the transient half-space Green’s function for a mass-like plane.
• There is no increase of computation in solving the equivalent source strengths.
• Reflection effect of the reflecting plane with mass-like character is significant.
• Simulations and an experiment demonstrate the feasibility of the proposed method.
Interpolated time-domain equivalent source method (ITDESM) is based on the assumption of free space, which makes it not suitable for reconstructing the transient acoustic quantities in the half space. Here, a half-space ITDESM is proposed to model the transient acoustic radiation over a mass-like plane. In this method, the free transient Green’s function existing in the conventional ITDESM is replaced by a closed-form transient half-space Green’s function for a mass-like plane. Such transient Green’s function enables one to take the reflection effect of the mass-like plane into consideration. Modeling acoustic radiation from three transient monopoles above an infinite plane with mass-like behavior is studied by numerical simulations to demonstrate the feasibility of the half-space ITDESM. The proposed method is also examined by comparing the reconstruction accuracy among a free-field model, a rigid plane model and a mass-like plane model. An experiment with an impacted steel plate lying above a table plate is conducted in the semi-anechoic room, and the results further verify the effectiveness of the proposed method.
Journal: Wave Motion - Volume 51, Issue 8, December 2014, Pages 1273–1287