Based On The Parameterization Of The Launching Dynamics Analysis Of A Certain Type Of Equipment

With material mechanics,structural dynamics and engineering mechanics as the theoretical basis and the finite element method(FEM)and secondary development of ABAQUS as the main research tool,the vehicle missile launching device was studied.Parametric modeling and dynamic response of launching site during launching were studied.The paper also studied the parametric modeling,mode analysis and optimization of composite launch tube.The composition and simulation method of ground wind load were analyzed and its impact on ready state of launching equipment was studied.In order to establish nonlinear finite element dynamic model of launching site accurately and quickly and realize the automation of simulation analysis,the secondary development of ABAQUS was introduced.ABAQUS’s own RSG was used to establish the parametric modeling interface and analysis figure interface of the launching site.Taking Expressway-1 as the investigated subject,the quasi-static response of launching site during missile standby phase and dynamic response of launching site during launching was studied based on the plug-in.In order to realize the automation of modeling and mode analysis of launch tube,the parametric modeling interface and mode analysis intexface was established based on the finite element dynamic model of launch tube.Then,the paper studied the optimization of composite launch tube and introduced multi-objective optimization.A multi-objective optimization model of composite launch tube was established by using non-dominated sorting genetic algorithm Ⅱ(NSGA-Ⅱ).The composite launch tube’s ply thickness and lamination angle were defined as design variables.The tube’s natural frequency and mass were regarded as optimization objectives.Utilizing ABAQUS’s own RSG to establish the parametric interface of ground wind load.Simulation analysis under different wind load conditions could be carried out by changing mean wind speed.The simulation method of pulse wind was studied.Time history curve of instantaneous wind speed considering the pulse effect was generated by using Von Karman power spectrum and harmonic synthesis method.According to the dynamic calculation method to generate the equivalent wind pressure and equivalent moment on launch tube segments.The total value of wind pressure on the wind surface of the launching tube and the equivalent moment were given by the equivalent static load method and the integral algorithm.To obtain the dynamic response of launching equipment,3 different wind load conditions were analyzed based on the plug-in.