The passenger side airbags(PAB)are usually larger than the driver airbags.Therefore,the inflator of PAB is more powerful with high mass rate.In this paper,an Arbitrary Lagrangian-Eulerian(ALE)method based computationa...The passenger side airbags(PAB)are usually larger than the driver airbags.Therefore,the inflator of PAB is more powerful with high mass rate.In this paper,an Arbitrary Lagrangian-Eulerian(ALE)method based computational method is developed to simulate the deployment of a PAB.The tank test is used to test the property of the inflator.Through comparison of numerical and experimental results,the ALE method is validated.Based on a failed airbag test,a smaller sub-airbag is placed inside PAB to disperse the gas flow to directions which are less damaging.By applying dynamic relaxation,the initial mesh corresponding to the experimental terms is obtained.The results indicate that the interior pressure and impact force coincide with the test data,and the method in this paper is capable of capturing airbag deploying process of the PAB module accurately.展开更多
中国新车评价规程(Chinese new car assessment programme,C-NCAP)2024版乘员保护板块中新增了侧面碰撞远端乘员保护的虚拟测评项目,但是当前车辆的被动安全系统尚没有达到该评价规程要求.针对该现状,提出了在远端乘员侧添加远端气囊的...中国新车评价规程(Chinese new car assessment programme,C-NCAP)2024版乘员保护板块中新增了侧面碰撞远端乘员保护的虚拟测评项目,但是当前车辆的被动安全系统尚没有达到该评价规程要求.针对该现状,提出了在远端乘员侧添加远端气囊的解决方案,建立了远端气囊有限元模型,并进行了试验对标.首先,运用CATIA软件建立远端气囊的三维模型,利用HyperMesh对气囊模型进行几何清理及网格划分;其次,采用Primer软件折叠划分好网格的气囊有限元模型,设置远端气囊的材料属性及模型参数,应用LS-DYNA软件进行运算求解;最后,根据静态点爆与动态冲击试验结果对标远端气囊有限元模型.结果表明,静态点爆试验对标误差为1.4%,动态冲击试验对标误差在10%以内,符合新规要求.展开更多
针对某车型侧气囊(SAB)进行了深度优化研究,运用数据分析方法制定了深度优化方案,并对优化后SAB在侧面撞柱试验中的保护效果进行了分析。结果表明,在对约束系统进行深度优化时,数值分析方法优于仿真分析和台架试验;3根肋骨变形量曲线彼...针对某车型侧气囊(SAB)进行了深度优化研究,运用数据分析方法制定了深度优化方案,并对优化后SAB在侧面撞柱试验中的保护效果进行了分析。结果表明,在对约束系统进行深度优化时,数值分析方法优于仿真分析和台架试验;3根肋骨变形量曲线彼此接近,整个侧面受力达到了较好的平衡,与SAB优化前的侧面碰撞试验结果相比,腹部力提高了0.17 k N,气囊优化达到了最佳状态。展开更多
基金supported by the National Basic Research Program of China("973"Project)(Grant Nos.2013CB036101 and 2010CB832704)the National Natural Science Foundation of China(Grant Nos.51221961,51279030 and 51309040)
文摘The passenger side airbags(PAB)are usually larger than the driver airbags.Therefore,the inflator of PAB is more powerful with high mass rate.In this paper,an Arbitrary Lagrangian-Eulerian(ALE)method based computational method is developed to simulate the deployment of a PAB.The tank test is used to test the property of the inflator.Through comparison of numerical and experimental results,the ALE method is validated.Based on a failed airbag test,a smaller sub-airbag is placed inside PAB to disperse the gas flow to directions which are less damaging.By applying dynamic relaxation,the initial mesh corresponding to the experimental terms is obtained.The results indicate that the interior pressure and impact force coincide with the test data,and the method in this paper is capable of capturing airbag deploying process of the PAB module accurately.
文摘中国新车评价规程(Chinese new car assessment programme,C-NCAP)2024版乘员保护板块中新增了侧面碰撞远端乘员保护的虚拟测评项目,但是当前车辆的被动安全系统尚没有达到该评价规程要求.针对该现状,提出了在远端乘员侧添加远端气囊的解决方案,建立了远端气囊有限元模型,并进行了试验对标.首先,运用CATIA软件建立远端气囊的三维模型,利用HyperMesh对气囊模型进行几何清理及网格划分;其次,采用Primer软件折叠划分好网格的气囊有限元模型,设置远端气囊的材料属性及模型参数,应用LS-DYNA软件进行运算求解;最后,根据静态点爆与动态冲击试验结果对标远端气囊有限元模型.结果表明,静态点爆试验对标误差为1.4%,动态冲击试验对标误差在10%以内,符合新规要求.
文摘针对某车型侧气囊(SAB)进行了深度优化研究,运用数据分析方法制定了深度优化方案,并对优化后SAB在侧面撞柱试验中的保护效果进行了分析。结果表明,在对约束系统进行深度优化时,数值分析方法优于仿真分析和台架试验;3根肋骨变形量曲线彼此接近,整个侧面受力达到了较好的平衡,与SAB优化前的侧面碰撞试验结果相比,腹部力提高了0.17 k N,气囊优化达到了最佳状态。
