Experimental and Numerical Analysis of Pressure-Effect Threat Model Based on SPH Method

Abstract

Based on smooth particle hydrodynamics (SPH) method, a model of impact response of tire burst pressure effect model on rear wall panel of landing gear cabin was established. The model was tested for air pressure distribution and airflow impact on the panel according to airworthiness regulations of the breach shape. The air pressure distribution on the panel after tire burst and the bearing capacity of the panel to the airflow impact were studied through test and simulation. Ultimately, it is found that the impact of tire burst airflow can lead to irreversible damage such as deformation of landing gear bulkhead ribs and bolt failure. The SHP simulation method proposed in this paper has a good explanation for the tire pressure effect threat model. Test and simulation can not only meet the requirements of airworthiness certification, but also provide the basis for structural design and strength analysis.