7Tong W H, Liu G R. An optimization procedure for truss structure with discrete design variables and dynamic constraints [J]. Computers & Structures, 2001,79 (2): 155-162.
8Sedaghati R, Suleman A, Tabarrok B. Structural optimizatiom with frequency constraints using the finite element force method [J]. AIAAJ, 2002,40(2) : 382-388.
9Cardosc J B, Arora J S. Design sensitirity analysis of nonlinear dynamic response of structural and mechanical systems [J]. Structural Optimization, 1992 (4) : 36--46.
10Gladwell G W L. Inverse problems in ribration [M]. Boston: Martinus Nijhoff Publishers, 1986.
