Complex systems such as automobiles consists of many modules which heterogeneous suppliers provide.However,it is very difficult to exchange detail structural analysis models between the system manufacturer and the suppliers as well as between the heterogeneous companies because in design stage the structural information of complex systems usually include the confidential information intended to be kept secret such as design of new product.Thus,these circumstances make the prediction of system performance difficult and inefficient,which leads to long development time especially for vibration or noise performance of complex systems due to high interactions between the modules.