Sensitivity analysis and optimization for city bus body

The finite element analysis model for the city bus body skeleton is built.The sensitivity of the overall body torsional stiffness and body's first-order natural frequency,which are constitutive parts of body frame,are analyzed respectively,using ANSYS.Choosing design variable due to the sensitivity analysis result,using the body's torsion stiffness and first-order natural frequency as the state variable,and using the body's gross mass as the objective function,the body's structure is optimized.