Structural design for a drum of a CTP device and modal analysis by means of ANSYS workbench have been done to get the first four natural frequencies and vibration models.Natural frequency and maximum deformation of dr...Structural design for a drum of a CTP device and modal analysis by means of ANSYS workbench have been done to get the first four natural frequencies and vibration models.Natural frequency and maximum deformation of drum as the optimization goal,three kinds of proposals are put forward based on the weak area of the drum.By means of adjusting static balance and adding thickness,an optimal project 3 is determined the best in the three kinds of proposals.The first natural frequency of the drum optimized is increased by 33.1% than that before optimization,the maximum displacement is reduced by 23.2%.Testing the result of simulation meets image high quality requirements,dynamics analysis and structural optimization are realized.展开更多
在竖向隔震中,为同时满足高静态刚度和低动态刚度的需求,提出一种基于预压碟簧的负刚度装置(disc spring negative stiffness device,DSNSD),利用其与已有的预压弹簧装置(prepressed spring device,PSD)集成为拥有高静低动刚度的竖向隔...在竖向隔震中,为同时满足高静态刚度和低动态刚度的需求,提出一种基于预压碟簧的负刚度装置(disc spring negative stiffness device,DSNSD),利用其与已有的预压弹簧装置(prepressed spring device,PSD)集成为拥有高静低动刚度的竖向隔震支座(PSD-DSNSD隔震支座)。首先对DSNSD的构造与工作原理进行详述,建立相应的力学模型,再通过Python进行数值模拟,考察上述碟簧装置的力学性能,最后利用Abaqus建立PSD-DSNSD竖向隔震支座的有限元模型进行模拟。结果表明:加入DSNSD后竖向隔震支座的隔震刚度显著降低,验证了将DSNSD用于竖向隔震增效的可行性。说明DSNSD在启动后可提供负刚度,从而有效减小整体装置的竖向刚度。展开更多
文摘Structural design for a drum of a CTP device and modal analysis by means of ANSYS workbench have been done to get the first four natural frequencies and vibration models.Natural frequency and maximum deformation of drum as the optimization goal,three kinds of proposals are put forward based on the weak area of the drum.By means of adjusting static balance and adding thickness,an optimal project 3 is determined the best in the three kinds of proposals.The first natural frequency of the drum optimized is increased by 33.1% than that before optimization,the maximum displacement is reduced by 23.2%.Testing the result of simulation meets image high quality requirements,dynamics analysis and structural optimization are realized.
文摘在竖向隔震中,为同时满足高静态刚度和低动态刚度的需求,提出一种基于预压碟簧的负刚度装置(disc spring negative stiffness device,DSNSD),利用其与已有的预压弹簧装置(prepressed spring device,PSD)集成为拥有高静低动刚度的竖向隔震支座(PSD-DSNSD隔震支座)。首先对DSNSD的构造与工作原理进行详述,建立相应的力学模型,再通过Python进行数值模拟,考察上述碟簧装置的力学性能,最后利用Abaqus建立PSD-DSNSD竖向隔震支座的有限元模型进行模拟。结果表明:加入DSNSD后竖向隔震支座的隔震刚度显著降低,验证了将DSNSD用于竖向隔震增效的可行性。说明DSNSD在启动后可提供负刚度,从而有效减小整体装置的竖向刚度。
