张拉膜结构风致动力灾变研究进展

发布时间：2018-12-20 14:17

【摘要】：为明确膜结构的风致动力灾变机理,分别从现场实测、气弹模型风洞试验、流固耦合数值模拟等方面的研究进展,探讨了膜结构附加气动力和气弹失稳机理等问题.研究表明:受实测设备、气弹模型试验相似理论和流固耦合模拟方法等方面的限制,膜结构流固耦合现象的观测模拟方面,针对实际工程的研究仍比较少;流固耦合振动机理方面,普遍认为,气弹失稳与形成于结构表面附近的旋涡有关,表现为结构总阻尼比的大幅衰减;但已有研究成果多基于对简单膜结构在近似均匀流场中振动现象的观测得出,与实际工程相差比较大.建议以后从以下几方面进一步深入:气弹模型试验相似理论的相似偏差量化分析方法和误差修正技术;大型膜结构实际工程流固耦合数值模拟关键技术;基于现场实测、气弹模型风洞试验、数值模拟和解析等多种研究手段的膜结构气弹失稳机理研究;便于工程设计人员接受的考虑流固耦合的膜结构抗风设计方法.
[Abstract]:In order to clarify the wind-induced dynamic catastrophe mechanism of membrane structure, the problems of additional aerodynamic force and aero-elastic instability mechanism of membrane structure are discussed from the aspects of field measurement, wind tunnel test of Aeroelastic model and numerical simulation of fluid-solid coupling. The results show that the observation and simulation of fluid-solid coupling phenomena of membrane structures are limited by the similar theory of Aeroelastic model test and fluid-solid coupling simulation, but the research on practical engineering is still few. As to the mechanism of fluid-solid coupling vibration, it is generally believed that the aero-elastic instability is related to the vortex formed near the surface of the structure, which is characterized by the large attenuation of the total damping ratio of the structure. However, most of the research results are based on the observation of the vibration phenomena of the simple membrane structure in the approximate uniform flow field, which is quite different from the actual engineering. It is suggested that the following aspects should be further explored: the quantitative analysis method of similarity deviation and error correction technique for the similarity theory of Aeroelastic model test, the key techniques for fluid-solid coupling numerical simulation of large scale membrane structures; Based on field measurement, wind tunnel test of aero-elastic model, numerical simulation and analysis, the mechanism of aero-elastic instability of membrane structure is studied, and the wind resistant design method of membrane structure considering fluid-solid coupling is accepted by engineering designers.
【作者单位】：结构工程灾变与控制教育部重点实验室(哈尔滨工业大学);东北电力大学建筑工程学院;
【基金】：国家自然科学基金重大研究计划重点项目(91215302);国家自然科学基金(51578186)
【分类号】：TU311.3

【相似文献】