Sensitivity analysis of factors affecting launching-site dynamic response of missile with unsupported random launch

The purpose is to study the factors affecting launching-site dynamic-response of missile with unsupported random launch. Based on the optimal-Latin-hypercube-design (OLHD) test design method and RBF neural network approximation technique, the approximate model was established, which included the plastic damage constitutive relation of unsupported-random-launch launching-site. Using this model, the sensitivity research for effect factors of the launching site displacement dynamic-response was conducted. The results show that: the elastic modulus of soil lay, the thickness of modified bituminous concrete lay and cement stabilized macadam lay are the main factors affecting the launching site displacement response, and all the three factors are inversely proportional to the displacement response. The elastic modulus of bituminous concrete in different intervals may lead to different sensitivity of launching site displacement response.