US-Egypt Cooperative Research: Integrating Computer Aided Design and Flexible Multi-Body Codes

0808399 Shabana该项目支持由芝加哥伊利诺伊大学机械工程系的Ahmed Shabana博士和埃及开罗开罗大学工程学院的Sayed Metwalli博士进行的合作研究。本项目的目标是开发一种新的方法，用于集成计算机辅助设计（CAD）系统和柔性多体代码（FMC）。这种新的方法将允许设计优化，数值模拟和可视化的多体系统计算机模型，包括相互连接的刚性和可变形的机构。在开发的计算机程序，将用于本次调查中，新的和具有挑战性的问题，集成优化和设计灵敏度分析方法与大变形有限元公式在柔性多体系统算法将得到解决。成功的集成将导致新一代的仿真代码，可用于许多机械和航空航天系统的大变形分析，设计和性能评估。在这个项目中将考虑的主要应用是车辆动力学。将特别注意研究运动型多用途车（SUV）的翻车情况。为了提高车辆的稳定性和避免高速下突然制动引起的侧翻，对由刚性和柔性车身、减振器和板簧组成的悬架系统进行了优化设计。开罗大学在CAD和设计优化领域拥有强大的研究计划，而伊利诺伊大学芝加哥分校在柔性多体动力学和计算力学领域拥有强大的计划。这两个机构在软件开发方面都有丰富的经验。特别是，开罗大学开发了一种CAD软件，已被许可给北美和埃及的工业和各种学术机构。在这个合作研究项目中，将探讨该软件与通用柔性多体系统算法的集成。人们相信，这种两种先进的方法的整合将导致一个新的和复杂的设计环境，将有重大影响的教育，设计方法和研究在这一领域。 UIC和开罗大学在这一研究领域都有正在进行的资助研究项目。技术优点：CAD和设计优化技术与大变形有限元/多体系统算法的集成是本提案的主题。这是一个新的和正在出现的领域，需要本摘要前面所述的两个具有不同技术专长的机构作出多学科努力。更广泛的影响：精确分析和成功设计详细的模型需要使用高效的迭代优化程序。CAD和大变形有限元/多体系统算法的成功集成对于这种详细模型的设计和虚拟样机是必要的。如前所述，由此产生的新设计环境将对工业和学术机构使用的设计程序产生重大影响。在这个研究项目中获得的结果也可以显着影响计算设计方法在我们的教育机构的教学方式。 该项目得到了美国-埃及联合基金方案的支持，该方案向两国的科学家和工程师提供赠款，以开展这些合作活动。

0808399ShabanaThis project supports collaborative research by Dr. Ahmed Shabana, Department of Mechanical Engineering, University of Illinois at Chicago and Dr. Sayed Metwalli, Faculty of Engineering, Cairo University, Cairo, Egypt. The objective of this project is to develop a new methodology for integrating computer aided design (CAD) systems and flexible multi-body codes (FMC). This new methodology will allow for the design optimization, numerical simulation and visualization of multi-body system computer models that consist of interconnected rigid and deformable bodies. In developing the computer procedures that will be used in this investigation, the new and challenging problems of integrating optimization and design sensitivity analysis methods with large deformation finite element formulations in flexible multi-body system algorithms will be addressed. Successful integration will lead to a new generation of simulation codes that can be used in the large deformation analysis, design and performance evaluation of many mechanical and aerospace systems. The main application that will be considered in this project is vehicle dynamics. Special attention will be given to study the rollover scenarios of sport utility vehicles (SUV). Optimal design of the suspension system that consist of rigid and flexible bodies, shock absorbers, and leaf springs modeled using large deformation finite element formulations will be sought in order to improve the vehicle stability and avoid rollover resulting from brake sudden application at high speeds. Cairo University has a strong research program in the CAD and design optimization area, while the University of Illinois at Chicago has a strong program in the area of flexible multi-body dynamics and computational mechanics. Both institutions have extensive experience in software development. In particular, Cairo University developed a CAD software that has been licensed to industry and various academic institutions in North America and Egypt. Integration of this software with general purpose flexible multi-body system algorithms will be explored in this collaborative research project. It is believed that such an integration of two advanced approaches will lead to a new and sophisticated design environment that will have a significant impact on education, design methodologies and research in this field. Both UIC and Cairo University have ongoing funded research projects in this research area.Technical Merit: The integration of CAD and design optimization techniques with large deformation finite element/multibody system algorithms is the subject of this proposal. This a new and emerging area which requires multi-disciplinary efforts from two institutions with different technical expertise as previously described in this summary. Broader Impact: The accurate analysis and successful design of detailed models requires the use of efficient iterative optimization procedures. The successful integration of CAD and large deformation finite element/multibody system algorithms is necessary for the design and virtual prototyping of such detailed models. The resulting new design environment will have, as previously mentioned, significant impact on the design procedures used in industry and academic institutions. The results obtained in this research project can also significantly impact the way computational design methods are taught at our educational institutions. This project is being supported under the US-Egypt Joint Fund Program, which provides grants to scientists and engineers in both countries to carry out these cooperative activities.