A newnumerical method based on vector form intrinsic finite element（VFIFE） is proposed to simulate the integral lifting process of steel structures. First, in order to verify the validity of the VFIFE method, taking...A newnumerical method based on vector form intrinsic finite element（VFIFE） is proposed to simulate the integral lifting process of steel structures. First, in order to verify the validity of the VFIFE method, taking the steel gallery between the integrated building and the attached building of Nanjing M obile Communication Buildings for example, the static analysis was carried out and the corresponding results were compared with the results achieved by the traditional finite element method. Then, according to the characteristics of dynamic construction of steel structure integral lifting, the tension cable element was employed to simulate the behavior of dynamic construction. The VFIFE method avoids the iterative solution of the stiffness matrix and the singularity problems. Therefore, it is simple to simulate the complete process of steel structure lifting construction.Finally, by using the VFIFE, the displacement and internal force time history curves of the steel structures under different lifting speeds are obtained. The results show that the lifting speed has influence on the lifting force, the internal force, and the displacement of the structure. In the case of normal lifting speed, the dynamic magnification factor of 1. 5 is safe and reasonable for practical application.展开更多
微机电系统(MEMS)矢量水听器在使用中会受到平台运动、海浪、洋流等冲击的干扰从而影响对目标声源的探测。为实现水听器的精准探测,提出了一种纤毛-硅柱结构的可抑制振动噪声的矢量水听器。设计了一种力矩平衡结构,利用COMSOL软件对矢...微机电系统(MEMS)矢量水听器在使用中会受到平台运动、海浪、洋流等冲击的干扰从而影响对目标声源的探测。为实现水听器的精准探测,提出了一种纤毛-硅柱结构的可抑制振动噪声的矢量水听器。设计了一种力矩平衡结构,利用COMSOL软件对矢量水听器的参数构建有限元分析模型,并对其静态分析、模态分析以及谐响应分析仿真。结果表明:矢量水听器灵敏度为-184.35 dB;可在0~100 g n载荷内正常工作;在工作带宽20~1000 Hz内能有效降低振动噪声带来的干扰。随后提出一种基于MEMS技术的可批量制造工艺,可确保硅柱与水听器的一体化集成,可极大提高矢量水听器的一致性。展开更多
基金The National Natural Science Foundation of China(No.51308105)
文摘A newnumerical method based on vector form intrinsic finite element（VFIFE） is proposed to simulate the integral lifting process of steel structures. First, in order to verify the validity of the VFIFE method, taking the steel gallery between the integrated building and the attached building of Nanjing M obile Communication Buildings for example, the static analysis was carried out and the corresponding results were compared with the results achieved by the traditional finite element method. Then, according to the characteristics of dynamic construction of steel structure integral lifting, the tension cable element was employed to simulate the behavior of dynamic construction. The VFIFE method avoids the iterative solution of the stiffness matrix and the singularity problems. Therefore, it is simple to simulate the complete process of steel structure lifting construction.Finally, by using the VFIFE, the displacement and internal force time history curves of the steel structures under different lifting speeds are obtained. The results show that the lifting speed has influence on the lifting force, the internal force, and the displacement of the structure. In the case of normal lifting speed, the dynamic magnification factor of 1. 5 is safe and reasonable for practical application.
文摘微机电系统(MEMS)矢量水听器在使用中会受到平台运动、海浪、洋流等冲击的干扰从而影响对目标声源的探测。为实现水听器的精准探测,提出了一种纤毛-硅柱结构的可抑制振动噪声的矢量水听器。设计了一种力矩平衡结构,利用COMSOL软件对矢量水听器的参数构建有限元分析模型,并对其静态分析、模态分析以及谐响应分析仿真。结果表明:矢量水听器灵敏度为-184.35 dB;可在0~100 g n载荷内正常工作;在工作带宽20~1000 Hz内能有效降低振动噪声带来的干扰。随后提出一种基于MEMS技术的可批量制造工艺,可确保硅柱与水听器的一体化集成,可极大提高矢量水听器的一致性。
