Results 21 to 30 of about 2,079 (136)

Hazard zonation for potential earthquake-induced landslide in the eastern East Kunlun fault zone

Open Geosciences
Based on probabilistic seismic hazard analysis, the seismic landslide hazard research considers the spatial and temporal distribution characteristics of seismic peak ground acceleration, which integrates the factors such as seismic intensity, location ...
Zheng Lifu, Fu Guochao, Luo Guichun
doaj   +1 more source

Torsional Vibration of a Shafting System under Electrical Disturbances

Shock and Vibration, 2012
Torsional vibration responses of a nonlinear shafting system are studied by a modified Riccati torsional transfer matrix combining with the Newmark-β method. Firstly, the system is modeled as a chain consisting of an elastic spring with concentrated mass
Ling Xiang, Shixi Yang, Chunbiao Gan
doaj   +1 more source

An improved method of Newmark analysis for mapping hazards of coseismic landslides [PDF]

Natural Hazards and Earth System Sciences, 2020
Coseismic landslides can destroy buildings, dislocate roads, sever pipelines, and cause heavy casualties. It is thus important but challenging to accurately map the hazards posed by coseismic landslides.
M. Zang, M. Zang, M. Zang, S. Qi, S. Qi, S. Qi, Y. Zou, Y. Zou, Y. Zou, Z. Sheng, B. S. Zamora   +10 more
doaj   +1 more source

Displacement Estimation of Structures With Flag‐Shaped Hysteresis Loops

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Time‐history analyses were conducted on single‐degree‐of‐freedom (SDOF) systems with flag‐shaped hysteresis loops using a far‐field ground motion suite to estimate peak displacements, Δp, and equivalent deformation cycles, Nc, associated with cumulative displacement demands.
Yudi Zhang, Gregory A. MacRae, Geoffrey W. Rodgers, Shahab Ramhormozian, Charles Clifton, Masoumeh Farshbaf   +5 more
wiley   +1 more source

Detecting Loosening of Bolt‐Flanged Pipe Using Smoothed Pseudo Wigner–Ville Distribution: Digital Twin‐Based Approach Using Convolution Neural Networks

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT In this paper, an integrated digital twin‐based fault‐diagnosis framework is proposed to detect bolt loosening in flanged pipe connections. The approach combines finite element‐based numerical modeling, experimental modal analysis, and advanced signal processing‐assisted deep learning to achieve reliable loosening detection under operational ...
Milad Shabani Yousefabad, Behzad Totakhaneh Bonab, Morteza Homayoun Sadeghi, Mir Mohammad Ettefagh, Mohammad Reza Chalak Qazani   +4 more
wiley   +1 more source

A Data-Driven Model for Predictive Modeling of Vortex-Induced Vibrations of a Long-Span Bridge

Applied Sciences
Vortex-induced vibration (VIV) of long-span bridges can be of large amplitude, which can influence serviceability. Therefore, it is important to predict the response of vortex-induced vibration to aid the management of long-span bridges.
Yafei Wang, Hui Feng, Nan Xu, Jiwei Zhong, Zhengxing Wang, Wenfan Yao, Yuyin Jiang, Shujin Laima   +7 more
doaj   +1 more source

Comparison of pseudo-static, Newmark and dynamic response analysis of the final pit wall of Sungun copper mine [PDF]

International Journal of Mining and Geo-Engineering, 2018
Sungun Copper Mine is located in an area with a high level of seismic hazard. Most recently, the Ahar-Varzeqan earthquake with a magnitude of 6.2 on Richter scale occurred on August 11, 2012; at a distance about 40 kilometers away from the mine ...
Hossain Noferesti, Ayyoob Hazegh
doaj   +1 more source

Analysis of Mechanical‐Electrical‐Hydraulic Coupled Vibration Response Characteristics of Thermal Control Circulating Pumps Supported by Water‐Lubricated Bearings

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT The operational reliability of thermal control circulation pumps is significantly restricted by the multi‐physics coupled environment. To reveal the vibration transmission mechanisms and dynamic response characteristics under multi‐field coupled excitations, a multi‐DOF coupled dynamic representation of the overall system, incorporating the ...
Jianfeng Luo, Liukai Hou, Yutao Zou, Kaiyuan Hao, Guangwu Zhou   +4 more
wiley   +1 more source

How digital platforms affect local entrepreneurial activities: Evidence from the staggered entry of craigslist

Strategic Entrepreneurship Journal, EarlyView.
Abstract Research Summary Access to markets is critical for entrepreneurial success, yet many face significant barriers. This study argues that digital platforms functioning as peer‐to‐peer marketplaces can facilitate entrepreneurial activity by improving market access for new ventures.
Daehyun Kim, Yongwook Paik, Namil Kim
wiley   +1 more source

Impact of Numerical Dissipation on Flow-Induced Vibration Simulation: A Comparative Study of Integration Schemes for Nonlinear Self-Excited Oscillations

Applied Sciences
Flow-induced self-excited vibration may exhibit high-frequency numerical oscillations and chaotic-like responses in long-duration simulations due to strong nonlinearity and multimodal coupling.
Jun Yang, Hongbing Guo, Zhi Duan, Jinze He, Xiaohui Liu, Yue Yang   +5 more
doaj   +1 more source