智能电动汽车安全设计新挑战及解决思路探讨
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乘员保护/行人保护相关功能
· *LOAD_PYRO_ACTUATOR/*DATABASE_PYRO· Calculatesnodal/segment forces from a pyrotechnic piston actuator without the need tomodel the chamber/piston· Input:nodes/segments, mass flow curve, chamber cross section area, etc· Pressure tubesensor is used to deteck pedestrain collision· New solutionmethod options- MTD=0: Standard Galerkin (CG) for Acoustic- MTD=1: Discontinuous Galerkin (DG) forAcoustic Equations(Less diffusive than CG)- MTD=2: DG for Isothermal Euler Equations <推荐>(More accurate for large amplitudesHandles shocks andrarefaction waves)更精确的模拟行人保护头部碰撞中的玻璃裂纹形状,业内有客户正在应用碰撞相关先进材料模型
失效应变\失稳应变的应力三轴度相关、非线性路径相关损伤累计、网格无关性高精度的地模拟金属、塑料的材料失效,已被广泛应用于各大汽车企业DMN-basedMultiscale Simulation of Short-Fiber Composites MachineLearning-based Multiscale Analysis of Composites (cont.) DMN-basedMultiscale Simulation of Short-Fiber Composites 先进碰撞相关仿真方法
· 可压溃梁Crushablebeam in LS-DYNA· A beam elementto simulate the behavior of beam type structures· inputForce/moment vs. displacement/rotation along local r, s and t· 可以非常方便的将整车结构约束为一整个刚体而使得相冲突的关键字失效,在满足特定条件后恢复。方便加快某些工况(如翻滚、自动驾驶)的车体碰撞前的姿态计算。· *CONSTRAINED_NODAL_RIGID_BODYtogether with *DEFORMABLE_TO_RIGID allows users to rigidize a few parts duringa specified period of time. However rigidizing the whole vehicle for pre-crashsimulation could be challenging since it will conflict with existing rigid bodyor constraint definitions.· *CONSTRAINE_NODAL_RIGID_BODY_MASTERdetects all conflicts and turns off all of them until the master rigid body isturned off by *SENSOR_CONTROL.车辆抗爆Mid-field AirBlast: Van Under Mine Blast (Lateral) 电池安全相关:整车分析级别的电池多物理场挤压解决方案
先进断裂模拟方法
整车碰撞对连接件处的钣金撕裂、焊核热影响区断裂精准考量
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