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发表时间：2010-01-01

发表刊物：工程力学

所属单位：运载工程与力学学部

卷号：27

期号：10

页面范围：155-161

ISSN号：1000-4750

摘要：A new smoothed elastic bimodular constitutive relationship is presented,
   thus the sensitivity of stiffness matrix with respect to displacement
   can be obtained conveniently. A FEM and sensitivity analysis based
   numerical model is developed to solve direct problems of truss
   structures with dual extensional/compressive modulus, and Newton-Raphson
   algorithm is employed in the solution process. By utilizing the
   solutions of direct problems, the identification of bimodulus is
   realized via an ant colony algorithm. Numerical verification with noisy
   data is provided with satisfactory results

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