of;
Mechanics;
and;
Applied;
Computer;
Science,;
Faculty;
of;
Mechanical;
Engineering,;
Military;
University;
of;
Technology,Warsaw;
00-908,;
Poland;
of;
Dynamics;
of;
Structures,;
Faculty;
of;
Civil;
Engineering,;
Wroclaw;
University;
of;
Technology,;
Wroclaw;
50-370,;
Poland;