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1. Validation of simulation results using time history data from full vehicle tests. This will be used to understand the simulation weaknesses and tune model parameters. As the simulation accuracy improves, the models will provide better data for componentoptimization.
2. Flexibility using the component mode synthesis technique will be added to other structures such as the cab/sleeper and the trailer. The flexibility of both these structures is believed to play an important role in ride and durability.
3. New CAE technologies such as fatigue analysis will be added. Computer aided engineering codes for fatigue life estimation have improved dramatically in recent years, and it is now possible to estimate the fatigue damage to a structure using the full time history loads from a multi-body simulation. Fatigue life contours can then be viewed on finite element models just as stress contours are today. This technology greatly enhances durability analysis and the development of a virtual proving ground.
ACKNOWLEDGMENTS
We would like to thank the management team at Western Star Trucks for having the vision to support the development of an integrated CAE process. We would also like to thank Ken Murray, Don Moore, Bob Perra, and Mark Gobessi for their careful review of the paper.
REFERENCES
1. “Mechanics of Heavy-Duty Trucks and Truck Combinations”, UMTRI Course Notes, July, 1995.
2. Stasa, Frank L., “Applied Finite Element Analysis for Engineers”, CBS College Publishing, 1985.
3. Ottarsson, Gisli, “Modal Flexibility Method in ADAMS/FLEX”, Mechanical Dynamics, Inc., March, 1998.
4. “Using ADAMS/FLEX”, Mechanical Dynamics, Inc.,1997.
5. “ADAMS/Finite Element Analysis Reference Manual”, Mechanical Dynamics, Inc., November 15,1994.
6. “Pro/MESH and Pro/FEM Post, User’s Guide”, Parametric Technology Corporation, 1997.
7. “ANSYS Structural Analysis Guide”, Analysis, Inc.,1994.
8. Gillespie, Thomas D., “Fundamentals of Vehicle Dynamics”, Society of Automotive Engineers, Inc.,1992.
9. Gobessi, Mark and Arnold, Wes, “The Application of Bonded Aluminum Sandwich Construction Technology to Achieve a Lightweight, Low Cost Automotive Structure”, SAE paper 982279.
摘要近年来，重型卡车市场变得非常的注重重量和降低成本。这对设计工程师是重大挑战，因为这些车辆被用在各种各样的公路环境，从高速公路到严重的越野环境。目前的挑战是在不牺牲耐用性和性能降低的前提下满足质量和成本。本文论述了运用计算机集成、计算机辅助设计和工程软件代码（Pro / Engineer，ADAMS软件和ANSYS）来辅助设计更改车架。
特别是，本文集中论述了一个ADAMS多体动力学模型，一个完整的卡车和拖车来模拟车辆的侧翻稳定性，平顺性，和耐久性载荷。该模型包括一个采用灵活的框架模型模态综合模式，探讨了有限元分析程序。之间的多体仿真链接与有限元程序也可以用来传输、加载应力分析有限元模型。所有代码之间紧密连结，确保新的设计并行计算可快速用于设计和分析。一个说明这是如何已被使用的技术详细的个案研究也包括在内。
简介
最近，重卡行业经历了汽车降低成本和重量的大发展源!自`优尔'文"论(文`网[www.youerw.com。这一直是卡车制造商的主要挑战，在不牺牲耐用性和性能的前提下，寻找好的方式来优化他们的汽车设计。
由于车架是车辆系统的重要组成部分，它经常被用于完善。本文概述了电脑辅助工程（CAE）分析更改车架以及这些变化会如何影响车辆性能。重型卡车的车架是该车辆的骨干，上面集成了主要的卡车组成系统，如车轴，悬架，动力总成，驾驶室。典型的结构框架是梯形框架，中间交叉几根横梁。纵梁的断面尺寸变化很大，根据在卡车上的受力而定。而且，需要考虑各种因素：重量，复杂性和成本。这些变化将取决于横梁的作用和位置。请参考图1插图，一辆卡车的车架。然而，横梁布置的变化带来的影响还无法看出来。例如，如果横梁的抗扭刚度降低，对汽车的侧倾稳定性和耐久性的影响是怎么的呢？设计工程师们需要对这些类型的问题给出答案以指导他们的工作。特别是，及时的设计和分析程序是必需的，这样新的设计可以快速评估。