摘要:基于锚杆系统自由段横向振动特性的检测方法可实现对锚杆的大范围快速有效检测。为提升锚杆轴力检测精度,建立锚杆系统横向振动力学模型,测试了全尺寸锚杆系统轴向加载过程中的频率响应。结果表明:锚杆系统横向振动固有频率对转动刚度及锚杆自由段长度比较敏感;通...
This meant they were able to travel along the streets in Townsville without being trapped in the already busy roadways. Across all the e-scooter users surveyed, most had never ridden an e-scooter before, but 91perce...