A preliminary design method for tuned liquid dampers conforming to space restrictions

作者：Love J S^*; Tait M J

来源：Engineering Structures, 2012, 40: 187-197.

DOI：10.1016/j.engstruct.2012.02.036

• Tuned liquid damper (TLD)
• Complex tank geometry
• Equivalent mechanical model
• Structure-TLD system tests
• Dynamic vibration absorber optimization

The building floor plan may place restrictions on the shape of a tuned liquid damper (TLD) tank, forcing a tank of complex geometry to be used. The behavior of these types of TLDs is not well understood, and a design procedure for this type of TLD is unavailable. %26lt;br%26gt;Obtaining suitable TLD dimensions and damping screen properties is paramount to TLD efficiency. This study develops a preliminary design procedure for a TLD of complex tank geometry coupled to a 1D structure. First, a linearized equivalent mechanical model representing the fluid is coupled to a linear 1D structure to predict the structure-TLD interaction. Since the structure is 1D, the mechanical model properties are transformed to be aligned with the structural direction of motion. Structure-TLD system tests are conducted to show that the transformed TLD properties can be used to model the system. %26lt;br%26gt;A design methodology is presented which enables a TLD tank to be designed to conform to space restrictions. To do this, the transformed TLD properties are related to the tank shape using normalized charts. The charts enable a designer to rapidly match transformed TLD properties to a specific tank shape. A tank shape that simultaneously satisfies the geometric restrictions, structure-TLD mass ratio, and natural frequency can be identified from a single chart. Subsequently, charts are used to identify the proper fluid depth and damping screen properties. An example is used to demonstrate the design method, and the resultant TLD%26apos;s performance is found to meet the design requirements using the mechanical model.

• 出版日期2012-7