The fast noise diagnostic techniques: HELS methods theory and engineering applications(Chinese Edition)

Paperback. Pub 2006 09 of 184 in Yellow River Water Conservancy Press fast noise diagnostic techniques (HELS methods theory and engineering application research) details the rapid startle diagnostic techniques - HELS philosophy and engineering applications research. The main contents include introduction to spherical harmonic function as an independent function the traditional HELS method. then use the column wave function. the point source dipole source. long rotating ellipsoid function instead of the spherical harmonic function as a separate function. and use examples to verify; through specific instance to define the scope of the various HELS method; analysis HELS method's limitations. and propose appropriate countermeasures. Acoustic infinite element method. in the proposed method HELS new fast noise diagnostic techniques. The closing can provide ...