微震动测试系统抗噪声干扰技术研究

详细分析了微震动测试系统的各种噪声源。通过建立固有噪声的电路模型、计算系统的噪声系数、分析噪声系数特点 ,设计了与压阻式震动传感器噪声匹配的的低噪声前置放大器。在分析干扰噪声的特点的基础上 ,设计了防电磁干扰的屏蔽系统。

多通道弹载振动测试系统的防水设计

为解决弹体跌落水中导致多通道弹载记录仪损坏、数据丢失的问题,文中分析记录仪浸水损坏的原因,根据导弹导航信息测试的实际需求,设计多通道弹载振动测试系统的防水结构和防水电路。首先根据IPX7级外壳防护要求,计算并设计带有O型密封圈旋盖的机械外壳,可保证在23.24 MPa的介质冲击下载荷不泄露;其次,为便于整体防水,改进系统的工作模式,将数据擦除、数据读取、电源开关控制的功能集成到一个接口。针对多通道振动测试系统需要外接传感器电缆的特点,从硬件设计入手加入电气隔离和过流保护模块。最后通过接插件浸水试验、5 m水池跌落试验和浸泡试验进行验证。结果表明,文中方法可为设计可靠的弹载记录仪提供一定的参考。

Pseudo-Dynamic Testing for Seismic Performance Assessment of Buildings with Seismic Isolation System Using Scrap Tire Rubber Pad Isolators

Investigation of seismic performance of buildings with STRP （scrap tire rubber pad） seismic isolators by means of pseudo-dynamic tests and numerical simulation is presented. The isolated building is numerically modeled, while the base isolation layer is considered as the experimental substructure in the pseudo-dynamic tests. The test result verifies that the STRP isolator shows acceptable shear deformation performance predicted by the design methods, and demonstrated that seismic isolation using STRP works as a protective measure to provide enhanced seismic performance of the building indicated by the reduction of top floor absolute acceleration, drift and base shear as designated.