汽车安全气囊碰撞有限元分析外文翻译-汽车设计(编辑修改稿)

汽车安全气囊碰撞有限元分析外文翻译-汽车设计(编辑修改稿)内容摘要：

ment mesh for the sensor was constructed using MSC/PATRAN [2]. The solver used to analyze the sensor was MSC/ABAQUS. The finite element mesh including the contact elements is shown in Figure 2. The plastic housing was assumed to be rigid in this analysis and was not modeled. Both springs were modeled with linear quadrilateral shell elements with thin shell physical properties. The ball was assumed to be rigid and was modeled with linear triangular shell elements with Bezier 3D rigid surface properties. To model contact between the ball and spring1, rigid surface interface (IRS) elements were used in conjunction with the Bezier 3D rigid surface elements making up the ball. Linear quadrilateral shell elements with IRS physical properties were placed on spring1 and had coincident nodes with the quadrilateral shell elements making up spring1. The IRS elements were used only in the region of ball contact. To model contact between spring1 and spring2, parallel slide line interface (ISL) elements were used in conjunction with slide line elements. Linear bar elements with ISL physical properties were placed on spring1 and had coincident nodes with the shell elements on spring1. Linear bar elements with slide line physical properties were placed on spring2 and had coincident nodes with the shell elements making up spring2. Material Both spring1 and spring2 were thin metallic springs modeled with a linear elastic material model. No material properties were required for the contact or rigid surface elements. Boundary Conditions Both springs were assumed to be fully restrained at their base to simulate a rigid plastic housing. An enforced displacement in the xdirection was applied to the ball. The ball wasfully restrained in all rotational and translational directions with the exception of the xdirection translation. Boundary conditions for the springs and ball are shown in Figure 2. DISCUSSION Typical results of interest for an electromechanical sensor would be the deflected shape of the springs, the forcedisplacement response of the sensor, and the stress levels in the springs. Results from an analysis of the electromechanical sensor shown in Figure 2 will be used as Figure 3. Electromechanical sensor deflected shape. an example for this paper. The deflected shape of this sensor is shown in Figure 3 for full ball travel. Looking at the deflected shape of the springs can provide insight into the performance of the sensor as well as aid in the design of the sensor housing. Stresses in the springs are important results in this analysis to ensure stress levels in the springs are at acceptable levels. Desired ponents of stress can be examined through various means including color contour plots. One of the most important results from the analysis is the forcedisplacement response for the sensor shown in Figure 4. From this forcedisplacement response, the force required to push spring1 into contact with spring2 can readily be determined. This force requirement can be used with a given acceleration to determine the mass required for the ball. Based on these results, one or more variations of sev。