Method for experimental determination of flutter speed by parameter identification

Original publisher: [Washington, D.C.] : National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ; Springfield, VA : For sale by the National Technical Information Service, 1989. OCLC Number: (OCoLC)34352859 Subject: Flutter (Aerodynamics) -- Mathematical models. Excerpt: ... USING TABLE 4. IDENTIFICATION MASS-STRING SYSTEM EXACT RESPONSES OF 0, ( n 5, nfreq 100, wfbegin wfend 40.0, nfrce 1 ) = = = = = SINGULAR VALUES SING ( 1 ) + + + + 02 E E E 0.805129E 02 0.610284E 02 0.389048 0.304252 02 0.939689 01 + E + + E 0.906324 01 0.698794 01 O.l88909E + Ol 0.149979E + 01 0.374279E + 00 + 0.146845E 00 INPUT MATRIX K +. 000000 00 0 E + E E E. 000000 0.600000 03-0.300000 03 00 0 0 00 E. 000000 + + + + 00 E. 000000 E. 000000 0 + 00 0 + + + E E E-0.300000 03 0.600000 03-0.300000 03 +-0.300000 03 0 E E + 00. 000000-0.300000 03 0.600000 03 0 00 +. 000000 E E E + +-0.300000 03 E +-0.300000 03 0.600000 03. 000000. 000000 0 00 0 00 + + + + E E E E E 0.600000 03 + + E E E E 0 00 0 00 0 00-0.300000 03. 000000. 000000. 000000 + + + IDENTIFIED MATRIX K E E E E--+ 0.600000 03-0.3OOOOO 03-0.223821 12 0.913047 12 +-0.436984E 12--0.300000E 03 + 0.6OOOOO 03-0.300000E 03-0.318323E 11 0.224532E 11--+ + E-0.216360E 11 03 +--0.300000 E E E E-0.600000 03-0.300000 03-0.909495 12 + +-0.448352E 11 + + 0.600000 03-0.300000 03 E E + E E-0.909495 12-0.300000 03--0.440892E-11-0.300000 E 0.600000 E 03 + 03 + 0.116529 11 0.682121 12 E E--INPUT MATRIX C 0.000000E O. 000000E-0.180000E + 01 00 + + 00 + + E E 0.540000 01-0.180000 01 +-0.180000E 01 + 0 S40000E 01-0.180000E + 01-0.180000E + 01 0.000000E + 00 0 00 +, 000000E + + + + 00-0.180000E 01 0.360000E 01-0.180000E 01 O. 000000E E + 01. 000000 00-0.180000E-0.180000E 0.540000E 01-0.180000E 01 0 01 + + + + + +-0.180000E 01 0.000000E 00 + + 01 E E-0.180000 01 0.540000. 000000 0 00 E + IDENTIFIED MATRIX C-+ 01 0.540000 01 0.204212E-13 0.807132E 13-0.180000E 01-0.18OOOO E E + +-0.180000E + 01 O....