Dynamics and Vibrations of Cable-Harnessed Structures Motivated by Space Applications

空间应用驱动的线束结构的动力学和振动

• 批准号: RGPIN-2022-03338
• 负责人: Salehian, Armaghan
• 金额: $ 1.97万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=760443
• 关键词: Dynamics; Vibrations; Cable; Harnessed; Structures

The high costs for launching satellite systems in space have been a significant motivation for the lighter design of space structures to reduce these costs. In this regard, inflatable technology that can be compressed into folded stacks of a few inches of thickness during launch before inflation and deployment over hundreds of feet in space has gained a revolutionary step in placing larger metrology systems in space to improve their coverage while meeting the launch costs and mass goals. While prized for their lightweight designs, the dynamic behaviour of these structures can be heavily impacted by additional components such as space flight cables. The ratio of power cables to payload mass can be up to 20% in a traditional space structure and increases significantly for inflatable structures due to their much smaller weight. Flight program tests performed by the US Air Force Research Labs were among the first to identify that the complexities of space structure dynamics are magnified when structural elements are harnessed to signal and power cables. These complexities, coupled with the unfeasibility of full system ground-based tests before launch due to the large size of inflatables, mandate the need for more accurate models that incorporate the dynamic effects of cables. Therefore, the long-term goal of my research program is to develop analytical tools to accurately model the complex dynamic effects of space flight cables on payloads for all classes of inflatable space technologies. To help achieve this goal, the five-year research program will focus on the development of novel, high-fidelity, simple, and effective analytical tools that are computationally efficient to understand the dynamic impacts of space flight cables on payload plate-like structures and composite cylindrical booms, and ultimately optimization for cables' placements to improve their dynamics. Being the only lab in Canada to perform research on space flight cables dynamic impacts on payload structures and also one of the three labs in Canada to conduct research on inflatable technologies, I will continue to provide the HQP with unique training opportunities that will be in demand by the space industry and companies like CSA, MDA, and Pratt and Whitney Canada. Also, the broader set of skills gained by the HQP on dynamics and vibrations will make them suitable for the automotive and energy industries. In addition, the proposed plan will directly benefit many science and engineering missions in monitoring the Arctic, climate change, oceanography, engineering metrology, Earth's water cycle observations, and forestry. Ultimately, the full implementation of the developed techniques in ultra-light inflatable space technology, anticipated in about ten years for the long-term goal, will significantly advance the field through placing high-fidelity metrology systems with substantially lower launch costs and will have a sustained impact on the space industry and the Canadian economy.

在空间发射卫星系统的高成本是空间结构轻量化设计以降低这些成本的一个重要动机。在这方面，可充气技术可以在发射期间压缩成几英寸厚的折叠堆叠，然后在数百英尺的太空中充气和部署，这在将更大的计量系统放置在太空中以改善其覆盖范围方面取得了革命性的进展，同时满足发射成本和质量目标。虽然这些结构因其轻量化设计而备受赞誉，但其动态性能可能会受到其他组件（如太空飞行电缆）的严重影响。在传统的空间结构中，电力电缆与有效载荷质量的比率可以高达20%，并且由于充气结构的重量小得多，其显著增加。由美国空军研究实验室进行的飞行计划测试是第一批确定当结构元件被利用到信号和电力电缆时，空间结构动力学的复杂性被放大的测试之一。这些复杂性，再加上由于充气式飞机尺寸大，在发射前进行全系统地面测试是不可行的，因此需要更精确的模型，其中包括电缆的动态效应。因此，我的研究计划的长期目标是开发分析工具，以准确地模拟太空飞行电缆对所有类别的充气式空间技术的有效载荷的复杂动态影响。为了帮助实现这一目标，五年的研究计划将专注于开发新颖，高保真，简单，有效的分析工具，这些工具在计算上有效地了解太空飞行电缆对有效载荷板状结构和复合材料圆柱形吊杆的动态影响，并最终优化电缆的放置以改善其动态。作为加拿大唯一一个研究太空飞行电缆对有效载荷结构动态影响的实验室，也是加拿大三个研究充气技术的实验室之一，我将继续为HQP提供独特的培训机会，这些机会将受到航天工业和CSA，MDA和Pratt and Whitney Canada等公司的需求。此外，HQP在动力学和振动方面获得的更广泛的技能将使其适用于汽车和能源行业。此外，拟议的计划将直接有利于监测北极、气候变化、海洋学、工程计量学、地球水循环观测和林业等方面的许多科学和工程任务。最后，预计在大约十年的时间内实现长期目标的超轻充气式空间技术中所开发的技术的全面实施，将通过以大大降低的发射成本安装高保真度计量系统而大大推进该领域的发展，并将对空间工业和加拿大经济产生持续的影响。