地震模拟振动台多向扩展系统  

Seismic simulation shaking table multidirectional expansion system

作　　者：程麦理 李青宁[1] 吴多[1] 毕研超 苗如松 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055

出　　处：《振动与冲击》2016年第8期73-77,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(51078306);国家青年基金项目(51408453);高等学校博士学科点专项科研基金(20106120110004);陕西省自然科学基础研究计划资助项目(2013JQ7007)

摘　　要：为利用单振动台实现大跨度空间结构多维多点激励的振动台试验研究,提出地震模拟振动台改向扩展系统概念。结合曲杆机构改变地震波传递方向的特性,对地震模拟振动台扩展系统进行结构动力分析。根据多点激励理论,考虑上部结构惯性力对子台的作用,推导出子台等效质量的计算公式。在谐波荷载作用下,给出多向扩展系统动力响应的解析式。研究表明,多向扩展系统能有效改变地震波的峰值加速度、相位和传递方向,是一种利用单振动台实现大跨结构多维多点激励试验研究的有效方法。算例结果验证了该理论的正确性,为振动台多向扩展系统的研制提供理论依据。For the multidimensional, structures by using single vibration table, this muhipoint excitation vibration table paper put forth a seismic simulation test research of large-span space shaking-table redirection extended system concept. Combined the characteristics of changed curved-bar mechanism on seismic wave propagation direction, the dynamics of the shaking table expand system was analyzed. Based on the multipoint excitation theory, considering the effect of superstructure inertia force to sub-units, the formula of the sub-units of equivalent mass was derived. Under the harmonic load, the multidirectional extended system dynamic response analytic expression was obtained. Studies show that multidirectional extended systems can effectively change the peak of seismic-wave acceleration, phase and the transfer direction; it is an effective method to achieve the large-span structure multipoint excitation test using a single shaking table. Examples show that the theory is correct; the method is reliable.

关 键 词：振动台 扩展系统 多维多点 曲杆机构 

分 类 号：TU311.3[建筑科学—结构工程] TU317.1