HAMAC is professional machinery products manufacturer-featuring a wide range of quality concrete mixer, concrete batching plant,concrete boom pump, mobile concrete plant, skid steer loaders,concrete pump, truck mixer,and concrete equipments and so on. Zhengzhou Hamac Co., Ltd. is located in the industrial zone, its the famous machinery capital of Zhengzhou, China.
With the first PMMS being successfully held online in 2020 (Due to the COVID-19 situation, most participants were not available to present in the conference, PMMS 2020 was held online on 19th October 2020), this year, the 2nd International Conference on Physics, Mechanics and Mathematical Science (PMMS 2021) will be held during November 20-21, 2021 at Huazhong Agricultural University
What is damping? The ter m "damping" i s o f ten misunderstood and misused. It is not a generic term for vibration control. A spring isolator does not "damp" or "dampen" vibration; it may have some damping properties of its own, but primary the reason it works is unrelated to damping. Damping is a process by which vibratory energy is dissipated, generally into small amounts of heat.
Vibration field data was measured on several large motor driven vertical cooling water pumps which experienced exces sive wear of the impellers, wear rings and seals after a short period of operation. The data indicated that the problem was due to the operating speed being near the pump-motor system 61 mechanical natural frequency, which resulted in excessive vibra tion levels on the
Gunter et al. (1983) explore an eddy current damping system for the cryogenic pumps used to de-liver the liquid fuel to the main engines of the space shuttle, which is based on the consideration that at very low temperature of the cryogenic pumps, the resistivity of the conductor is decreased and thus a large damping force can be induced.
Mobile concrete batching plants are also known as the skiptype concrete batching plant modular concrete mixing plants ready mix concrete batching plant etc They are especially designed for construction projects requiring strong mobility of a batching plant such as hydropwer stations express highways rail ways bridges docks airports and so on
Nov 26, 2013 · Mobile concrete pump boom is typical multibody large-scale motion manipulator. Due to posture constantly change in working process, kinematic rule and dynamic characteristic are difficult to solve. A dynamics model of a mobile concrete pump boom is established based on discrete time transfer matrix method (DTTMM). The boom system is divided into sub-structure A and substructure …
Apr 06, 2015 · Xia, C, Zhang, M. Strength analysis and structural parameters optimization of the boom system of the truck-mounted concrete pump. In: Proceedings of international conference on electric information and control engineering, Wuhan, China, 15–17 April 2011, pp. 5340 – 5343. New York: IEEE Computer Society. Google Scholar
By far there is lack of research on different working conditions between rigid and flexible dynamics of truck mounted concrete pump booms. First a 3D model has been established by using virtual prototyping technology of a 37 m long boom in Pro/Engineering software. Then the rigid body simulation model has been built. Next modal superimposition method is adopted to change the 4 rigid body booms
Pressure variation (m) and pipe vibration (in acceleration units). According to Figure 3 and the known frequency of the pressure wave, it is possible to estimate the pipe vibration in terms of displacements. Figure 4 shows the total displacement calculated and the respective maximum displacement achieved in the laboratory facility. -0.09-0.08-0.07
Smart applications of the Internet of Things are improving the performance of buildings, reducing energy demand. Local and smart networks, soft computing methodologies, machine intelligence algorithms and pervasive sensors are some of the basics of energy optimization strategies developed for the benefit of environmental sustainability and user comfort. This work presents a distributed sensor
Jan 01, 2018 · Keywords: semantic network, text processing, information retrieval, taxonomy of relations. 1. Introduction Ontologies are presented as a result of analysis of natural language texts. They are usually associated with such areas as information retrieval, text analysis, ma-chine translation, expert systems, knowledge management systems.
systems (MEMS) are piezoelectric acceleration sensors, micro-actuators, and micro-pumps [8–12]. In particular, Shan et al.  presented two control techniques based on an axis frame mounted with a PZT transducer. Zhang et al.  conducted strain rate feedback control to suppress unwanted vibration of a manipulator with ﬂexible parts.
PostDoc at Politecnico di Milano - Cited by 739 - Mechanical Engineering - Dynamics - Vibrations and Control
Feb 15, 2013 · • Vibration Control and Isolation We strongly believe that ICOVP-2013 will have a significant impact on the development of contemporary analytical, numerical and experimental methods in vibration problems, and will also create an opportunity for opening a forum for discussion and collaboration amongst the participants.
made the blasting vibration problem become more prominent and increase the difficulty and risks of con-struction blasting. With slight mistakes of construction measures, the blasting vibration may cause walls and concrete to be cracked and cause paint loss, glass doors and windows to be broken, which seriously endangered the safety of building.
The Sci-Hub project supports Open Access movement in science. Research should be published in open access, i.e. be free to read. The Open Access is a new and advanced form of scientific communication, which is going to replace outdated subscription models.
R. Liu, Y. Gao, S. Yang, and Y. Yang, "Vibration control of the boom system of truck-mounted concrete pump based on constant-position commandless input shaping technique," Shock and Vibration, vol. 2015, Article ID 420935, 9 pages, 2015. View at: Publisher Site | Google Scholar
Feb 05, 2021 · Ye X and Ding X T 2016 Vibration characteristics and resistance of structures of third Huaian pumping station. Adv. Sci.Technol. Water Resour. 36 86–89. Google Scholar 14. Wang X, Li T C and Pan S J 2008 Vibration analysis of the pump-house of the third Huaiyin Pumping Station. Adv. Sci. Technol. Water Resour. 28(5) 49–53
Portable Plants – Stephens Manufacturing
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