高能光源束流位置探测器支撑架结构优化设计

Structural optimization design for beam position monitor support of High Energy Photon Source

从热稳定性和振动稳定性两个角度出发,优化设计得到了超高稳定的刚性支撑架结构;通过ANSYS有限元模态分析,验证了结构的热膨胀变化量和特征频率;采用混凝土二次灌浆方法对支撑架进行地面固定和特征频率测试,结果表明,支撑架结构的特征频率达到61.9 Hz、振动幅值小于30 nm,均满足设计要求。最后采用动态刚度测试方法,得到混凝土二次灌浆层的主要刚度值,进一步验证支撑架结构优化结果的准确性。

Based on thermal stability and vibration stability,an ultra stability structure of rigid support is designed and optimized.Through the finite element modal analysis of ANSYS,the thermal expansion variation and the characteristic frequency of the support is verified.The support is fixated to the ground by using the method of concrete grouting and then the characteristic frequency is tested.The test results show that the characteristic frequency of the support reaches up to 61.9 Hz and the vibration amplitude is less than 30 nm,both of which meet the design requirements.Finally,the method of dynamic stiffness testing is adopted to obtain the stiffness value of the concrete grouting,and the accuracy of the optimization results of the support is further verified.