Overview
Principles of Construction
Tuned Mass Damper (TMD) is a commonly used vibration control device in high-rise buildings, bridges, and other large structures.
It consists of a mass, a spring, and an energy dissipation damping system. By adjusting parameters such as the mass ratio, frequency ratio, and damping ratio of the TMD system to the main structure, its natural vibration frequency resonates with the controlled mode frequency of the main structure. When the main structure is subjected to external dynamic forces, TMD will provide a force with almost equal frequency and opposite direction of structural motion to counteract some of the structural response caused by external excitation, thereby achieving the purpose of vibration reduction.
The working principle of a tuned mass damper is similar to tuning in the transmission and reception process of electromagnetic waves. By changing the resonance characteristics of the structure, it reduces the energy dissipation requirements of basic structural components under external forces.
Product advantages
The product advantages of harmonic mass dampers mainly lie in convenient construction and installation, adjustable frequency, compact structure, stable mechanical performance, good durability, and the presence of bidirectional guiding devices.
1. Convenient construction and installation: The design of tuned mass dampers makes construction, installation, and maintenance simple, reducing project costs and time.
2. Frequency adjustable: According to actual engineering requirements, the tuning frequency of the tuned mass damper can be flexibly adjusted within a range of ± 20% to eliminate adverse effects caused by calculation or construction errors and ensure vibration reduction effect.
3. Compact structure: The design of the tuned mass damper is compact and reasonable, with high space utilization, suitable for application in various structures.
4. Stable mechanical performance and good durability: The mechanical performance of tuned mass dampers is stable and controllable, with good durability, including aging and fatigue resistance, ensuring long-term use effectiveness.
5. Equipped with bidirectional guidance device: The tuned mass damper is equipped with bidirectional guidance device, effectively eliminating the possible swinging or overturning phenomenon in non primary vibration direction, and improving the safety of the structure
Specification
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Product Name
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Tuned mass dampers (TMD)
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The working principle of tuned mass dampers is based on the principles of dynamics. By introducing additional mass blocks, they generate opposite vibrations on the structure, thereby offsetting or reducing the vibrations caused by external excitations such as wind and earthquakes.
Specifically, tuned mass dampers are typically composed of mass blocks, springs, and dampers. When external stimuli are applied to the structure, such as strong winds or earthquakes, the structure will vibrate. This vibration can cause excessive stress and deformation in certain parts of the structure, which may lead to structural damage. The mass block in the tuned mass damper will be affected by structural vibration and produce motion opposite to the direction of structural vibration. This reverse motion will generate an opposite force that will act on the structure, thereby reducing the vibration amplitude of the structure. At the same time, the damper will absorb and dissipate the energy generated by the relative motion between the mass block and the main structure, further reducing the vibration of the structure.
In order to make the tuned mass damper work most effectively, it is necessary to tune it by adjusting the mass of the mass block and the stiffness of the spring to match the natural frequency of the structure. When the natural frequency of the damper is equal to the natural frequency of the structure, the damper can most effectively absorb and consume the vibration energy of the structure. |
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Product Structure
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The tuned mass damper mainly consists of three parts: mass block, spring system, and damper.
Mass block: It is one of the core components of the tuned mass damper, which acts on the structure by utilizing the inertial force generated by the relative motion between the mass block and the structure, thereby reducing the structural response. The size of the mass block usually affects the damping effect. Generally speaking, the larger the mass block, the better the damping effect.
Spring system: connected between the mass block and the main structure, used to adjust the natural frequency of the tuned mass damper to match the resonance frequency of the main structure. In this way, when the main structure vibrates under external excitation, the spring system can guide the mass block to generate an inertial force opposite to the direction of the main structure vibration, thereby reducing the vibration response of the main structure.
Damper: used to absorb and dissipate the energy generated by the relative motion between the mass block and the main structure, further reducing the vibration of the structure. The performance of dampers has a significant impact on the overall effectiveness of tuned mass dampers. The use of non orifice throttling dampers can achieve controllable and stable mechanical performance, and improve durability. |
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Applications
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Tuned Mass Dampers (TMDs) are mainly used in civil engineering and other engineering fields to reduce structural vibrations.
In the field of civil engineering, tuned mass dampers are widely used for seismic and vibration reduction in high-rise buildings, bridges, towers, and other structures. By adjusting its vibration frequency to be close to the frequency of the controlled main structure, the tuned mass damper can significantly reduce the dynamic response of the structure under earthquake, strong wind or environmental excitation, and improve the stability and safety of the structure.
In addition, tuned mass dampers are also suitable for the field of mechanical engineering, such as reducing the vibration of rotating mechanical equipment such as turbines and generators, improving the stability and lifespan of equipment operation, and reducing the performance loss of precision instruments in vibration environments. In the aerospace field, it can be used to reduce the vibration of aircraft wings, fuselage structures, as well as satellites, space stations, etc., to avoid subtle vibrations affecting equipment operation. In ship engineering, tuned mass dampers can reduce the vibration of ship hull caused by ocean waves and improve the comfort and durability of ships. |
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Product parameter adjustment
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Both the frequency and damping ratio of TMD can be adjusted on site according to the inherent frequency of the structure, which is simple to adjust and easy to operate.
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Program Design
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We can provide detailed drawings of TMD design solutions
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Company Profile
Hengshui Siwo New Material Technology Development Co., Ltd. is a professional manufacturer of seismic isolation and reduction, integrating research and development, production, and sales. It mainly involves the fields of construction and bridges, covering building steel structure bearings, bridge bearings, expansion devices, seismic ball steel bearings, seismic isolation rubber bearings, basin type bearings, yield type dampers, displacement type dampers, TMD tuned mass dampers, buckling restrained supports, etc.
The company currently has 78 fixed employees, including 18 technical personnel and 12 personnel with senior and intermediate professional titles. The company has established long-term cooperative relationships with universities such as Tsinghua University, Tongji University, Harbin Institute of Technology, Hunan University, Chongqing University, as well as design institutes such as Beijing Institute of Architecture, East China Institute, China Construction Southwest Institute, and China Aviation Institute. It is committed to scientific and technological innovation, product innovation, and keeping up with the pace of university industry research cooperation. At the same time, it is committed to structural design, engineering calculations, finite element analysis, and product trial testing cooperation, and is committed to new product research and development, making products more refined, optimized, and strong.
The company covers an area of over 270 acres (180000 square meters), including workshops for mechanical processing, rubber products, product assembly, and other processes. There are more than 50 sets of production equipment, including CNC lathes, CNC milling machines, CNC drilling machines, CNC cutting equipment, vulcanizing machines, internal mixers, and open mixers, to meet the processing needs of various products.
The company's testing center has excellent equipment and complete testing facilities. Equipped with trained and qualified professional quality inspectors, the products are inspected throughout the entire process to ensure that unqualified raw materials do not enter the factory, unqualified semi-finished products do not transfer to another process, and unqualified products do not leave the factory.
Driven by research and development, we strive to refine, optimize, and strengthen our products. Our consistent policy is to provide high-quality products and services that bring economic benefits to our enterprises while creating greater social benefits.
Why Choose Us
Advanced production equipment
Adequate inventory
praise from customers
FAQ
Q1: Are you trading company or manufacturer?
A:We are manufacturer.
Q2: What's your MOQ?
A:Normally it's 500 meters for one size and one color.
Q3: What's your output?
A:500,000 meters per week
Q4: How long is your delivery time?
A:Generally it is 5-10 days if the goods are in stock. And for mass production it takes 15-20 days.
Q5: May I have samples ? is it free or extra?
A:Yes, we are happy to explore new product with our customers. If the sample need to be customized, please contact us. For the regular item, we supply 3-5meters samples for free. And customer pay the sample freight only.
Q6: Whether to support customized services?
A:We can customize according to drawings or samples,Production mold independent research and development manufacturing, independent transformation of production equipment.
Q7: What is your terms of delivery?
A:EXW.FOB.CFR.CIF,DDU.etc.
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