Tổng hợp tài liệu Cơ Khí - Chế Tạo Máy tham khảo cho học sinh, sinh viên.
In this study, deriving the differential equations of motion of self-balanced two-wheel vehicle and designing a controller to maintain vehicle motion are presented. The method of substructures has been exploited successfully in establishing equations of motion of the vehicle. Because the system has two degrees of freedom but only one actuator, a...
9 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 551 | Lượt tải: 0
A thermal buckling analysis of imperfect circular cylindrical shells of functionally graded material is considered. The material properties are assumed varying as a power form of thickness coordinate variable. The Donnell equilibrium and stability equations are considered and the Wan-Donnell model for initial geometrical imperfection is adopted. ...
10 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 432 | Lượt tải: 0
In the considered problem, the dependence of the yield limit on the amplitude of the loading is not classical. Our discussion shows that well-known general theorems of shakedown analysis and of limit analysis remain available and that static and kinematic approaches can be applied within some minor modifications. New expressions of the critical ...
9 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 476 | Lượt tải: 0
The work is supported by the National Science Foundation of Vietnam. This is the content of a plenary report presented at the National Conference on Mechanics commemorizing the 30-th anniversary of the Institute of Mechanics and Vietnam Journal of Mechanics, Hanoi 8/4/2009
8 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 477 | Lượt tải: 0
In order to meet the need of the adequate wave input parameters at all and to fulfill the research task of the project “Determining the wave heights for sea dyke designed along the coastal line from Quang Ninh to Quang Nam” in particular, the authors have developed the SWAN model for storm and monsoon waves computation in the deep sea areas. For...
9 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 530 | Lượt tải: 0
In this paper, a passive absorber that uses Coriolies force to reduce vibration is introduced. This absorber moves in the radial direction of a swinging pendulum. Therefore, it has many differences with conventional absorbers that move in the circumference direction. For example, the relationship between the absorbers’ effectiveness and their loc...
8 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 687 | Lượt tải: 0
Nghiên cứu này trình bày hiệu quả của các phương pháp gia tăng độ cứng chống trượt khác nhau sử dụng thép tấm dán bằng epoxy, các dải thép và các tấm nhựa gia cường bằng sợi carbon (CFRP) và neo bằng các nẹp ngoài để tạo ra độ bền chống trượt cho dầm bê tông cốt thép. Trong công trình này đã tiến hành chương trình thí nghiệm cho hai loạt mẫu với...
8 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 516 | Lượt tải: 0
In this study, the problem on the calculation of steady-state periodic vibrations of elastic transmission mechanisms is addressed. The differential equations of motion of the mechanism is established and linearized to obtain a system of linear differential equations having time-varying coefficients, known as a parametric vibration system. A num...
11 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 578 | Lượt tải: 0
The results of this study allow us to draw the following conclusions: 1. The turbulent burning velocity coefficient of biogas-air mixture in the combustion chamber of a Honda Wave motorcycle engine fueled with compressed biogas containing 85% CH4 is approximately 1.3. 2. The indicated cycle work of a 110cc Honda Wave motorcycle engine reduces 28%...
12 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 439 | Lượt tải: 0
The kinematical model of the serial-parallel robot is formulated. The kinematics equation of the considering robot must satisfy the constraint equation because of the motion constrained of the parallel links. This is different from the typical serial robot. The end-effector moves always parallel with the ground surface that could simplify the c...
8 trang | Chia sẻ: huongthu9 | Ngày: 11/08/2021 | Lượt xem: 607 | Lượt tải: 0
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