Results 61 to 70 of about 3,846 (166)

Fault Diagnosis of Spindle Device in Hoist Using Variational Mode Decomposition and Statistical Features

Shock and Vibration, 2020
By analyzing nonlinear and nonstationary vibration signals from the spindle device of the mine hoist, it is a challenge to overcome the difficulty of fault feature extraction and accurately identify the fault of rotor-bearing system.
Jun Gu, Yuxing Peng, Hao Lu, Shuang Cao, Bobo Cao   +4 more
doaj   +1 more source

Updating the forelimb anatomy of the domestic cat (Felis catus, Felidae) based on evolutionary inferences of its muscles and nerves I: Shoulder and brachium

Journal of Anatomy, Volume 249, Issue 5, Page 1138-1169, November 2026.
In this study, we provide a detailed description of the shoulder and brachium muscles and the brachial plexus of the domestic cat (Felis catus). We identified muscular variants (articularis humeri, coracobrachialis longus, biceps brachii caput breve), clarified the independence of the anconeus medialis muscle from the triceps brachii muscle, and ...
Juan Fernando Vélez García, Ismael Vélez Cabrera, Maria Angelica Miglino   +2 more
wiley   +1 more source

Stability analysis of machine tool spindle under uncertainty

Advances in Mechanical Engineering, 2016
Chatter is a harmful machining vibration that occurs between the workpiece and the cutting tool, usually resulting in irregular flaw streaks on the finished surface and severe tool wear.
Wei Dou, Xiaocong He, Biao Tang
doaj   +1 more source

Dynamic Research of the Shaft Orbit of Hydrostatic Spindle Under the Sliding Velocity

工程科学与技术, 2017
:Based on the load increment method and the pressure perturbation method,the dynamic performance of liquid hydraulic spindle system was researched.Using the finite difference method,the nonlinear oil film force was calculated by solving the Reynolds ...
陈东菊, 薛斌, 高雪, 范晋伟, 张飞虎   +4 more
doaj  

Dermatofibrosarcoma protuberans at an uncommon site

Indian Journal of Dermatology, 2014
Dermatofibrosarcoma protuberans (DFSP) is a locally aggressive, cutaneous, malignant tumor characterized by high propensity for local relapse and low metastatic potential.
Vidyadhar R Sardesai, Rohan M Patil, Trupti D Agarwal   +2 more
doaj   +1 more source

STATIC ANALYSIS OF SPINDLE SHAFTS ON NONLINEAR ELASTIC SUPPORTS OF INTERRELATED STIFFNESSES

Bulletin of the National technical university "Kharkiv Polytechnic Institute" Series: Techniques in a machine industry
Шпиндельний вузол металорізального верстата визначає точність та продуктивність металообробки. Жорсткість шпиндельного вузла оцінюються пружними переміщеннями шпиндельного валу під впливом робочого навантаження. Коректне моделювання жорсткості підшипників є умовою отримання достовірних результатів під час аналізу жорсткості шпинделя.
Valerij Khavin, Evgen Khavin, Borys Kyrkach   +2 more
openaire   +3 more sources

Research on the Calculation Method for the Contact Stress of Wind Turbine Main Shaft Bearings Based on Finite Element Analysis

Lubricants
Under alternating loads, the contact situation for self-aligning roller bearings in the main shaft of a wind turbine is complex. Few methodologies exist for calculating the contact stress of main shaft bearings.
Yi Zou, Wenlei Sun, Hongwei Wang, Tiantian Xu, Bingkai Wang   +4 more
doaj   +1 more source

Research on the nonlinear dynamic characteristics of opposed high-speed gas bearing systems

Journal of Low Frequency Noise, Vibration and Active Control, 2020
In recent years, the opposed high-speed gas bearing system has been gradually valued and used in the field of precision machinery, especially for precision instruments and mechanisms requiring high speed, high precision, and high rigidity.
Cheng-Chi Wang, Rong-Mao Lee, Chih-Jer Lin, Chih-Yung Huang, Tsui-Er Lee   +4 more
doaj   +1 more source

Static analysis of multi-turn stepped spindle shafts on nonlinear elastic supports

Bulletin of the National Technical University «KhPI» Series: Dynamics and Strength of Machines
In this paper a mathematical model and a computational technique for the static analysis of multi-support stepped spindle shafts on nonlinear elastic supports are presented. On the basis of the Timoshenko differential equation of the beam's bent axis and the method of initial parameters, a resolving system of equations is obtained that takes into ...
Valerii Havin, Oleksiy Kyrkach, Borys Kyrkach   +2 more
openaire   +3 more sources

Modular design and multi-objective performance optimization of an extended mechanical spindle for DH horizontal machining centers

Scientific Reports
Conventional horizontal machining centers face critical limitations in machining large-scale complex workpieces due to insufficient spindle extension capability.
Xinchen Chen, Haiou Li, Chenxin Dong, Ye Tao   +3 more
doaj   +1 more source