Occurring Mechanism and Restraining Method Research of Numerical Noise Signal in Penetration Simulat

• 作 者: WANG Chen WANG Yabin
• 机 构: National Key Laboratory on Electromechanical Dynamic Control, Beijing Institute of Technology,
• 出 处: Chinese Journal of Mechanical Engineering
• 发表日期: 2016年05期
• 关键词: hard target penetration numerical simulation signal of numerical noise spectral

In hard target penetration simulation, the existing researches of the convergence of results are mainly concentrating in the corresponding relationship between penetration depth and mesh scales. However, the influence of the mesh difference on the penetration resistance and acceleration signals are seldom refer to. This paper presents the occurring mechanism and restraining method of numerical noise signal in penetration simulation. First, the concept of the noise signal izs proposed. By taking a 3D penetration simulation as example, the influence of the noise signal on the penetration resistance in different mesh scales and impact velocity is studied. To ensure the convergence of the computational results, the grid scale of the target is encrypted to 1:1:8. In addition, modern spectrum analysis method is introduced to further analyze the penetration resistance signal. The research results presented is useful to improve the computational accuracy of high speed projectile penetration simulation, and provide important reference for carrying out structural design and optimization of fuze system.

In hard target penetration simulation and the existing researches of the convergence of results are mainly concentrating in the corresponding relationship between penetration depth and mesh scales. However, the influence of the mesh difference on the penetration resistance and acceleration signals are seldom refer to. This paper presents the occurring mechanism and restraining method of numerical noise signal in penetration simulation. First, the concept of the noise signal izs proposed. By taking a 3D penetration simulation as example, the influence of the noise signal on the penetration resistance in different mesh scales and impact velocity is studied. To ensure the convergence of the computational results, the grid scale of the target is encrypted to 1: 1: 8. In addition, modern spectrum analysis method is introduced to further analyze the penetration resistance signal. is useful to improve the computational accuracy of high speed projectile penetration si mulation, and provide important reference for carrying out structural design and optimization of fuze system.