公开(公告)号：US20200157763A1

公开(公告)日：2020-05-21

申请号：US16477184

申请日：2018-03-19

Applicant: Dalian University of Technology

Inventor： Jianbo LI ,  Weihong LIU ,  Zhiyuan LI ,  Gao LIN

IPC: E02D33/00 ,  E02D27/32

Abstract: A measuring device and method for horizontal dynamic impedance of specified foundation depth based on differential response analysis of pulse excitation. The measuring method is realized based on the measuring device. Two rigid piles with different lengths are embedded into different foundation depths. Motion characteristics of the two rigid piles in the process of collision impact with the outside are different under the same pulse excitation. Dynamic impedance of specified foundation depth is deduced from the formula according to the differential response. Single-degree-of-freedom oscillators are arranged on the pile heads of the two piles, and strain gauges are arranged on the bottoms of the single-degree-of-freedom oscillators to obtain stress states of the single-degree-of-freedom oscillators, thereby calculating the relative displacements of the single-degree-of-freedom oscillators. This is simple in structure, reliable in measurement and convenient in data collection and processing.

公开(公告)号：US20200233012A1

公开(公告)日：2020-07-23

申请号：US16477189

申请日：2018-07-05

Applicant: Dalian University of Technology

Inventor： Jianbo LI ,  Kai YANG ,  Shiyun XIAO ,  Runyu MEI ,  Zhiqiang HU ,  Lei ZHOU ,  Jun LIU ,  Zhiyuan LI

IPC: G01P15/16

Abstract: An apparatus and method for measuring a structural angular acceleration based on dynamic centrifugal force measurement belong to the technical field of angular acceleration measurement. The apparatus has a solid ball. The solid ball can move freely along the radial direction of the outer wall packaging hood. The elastic block is used as a stress base. A rod for lateral limit and connection is used for connecting the rigid block and a pulley and limiting the displacement of solid ball so that the solid ball can only move longitudinally along the apparatus. The rigid block can move freely due to the pulley. Measurement of a transient angular acceleration is converted into dynamic measurement of the centrifugal force of the solid ball. Through the above design, the dynamic angular acceleration of the structure caused by dynamic load can be relatively accurately calculated.