Photovoltaic bracket damping characteristics

Taking a flexible PV bracket with a span of 30 m and a cable axial force of 75 kN as the research object, we investigate the variation patterns of the support cables and wind-resistant cables under temperature decrease and increase scenarios.
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About Photovoltaic bracket damping characteristics

About Photovoltaic bracket damping characteristics

Taking a flexible PV bracket with a span of 30 m and a cable axial force of 75 kN as the research object, we investigate the variation patterns of the support cables and wind-resistant cables under temperature decrease and increase scenarios.

Taking a flexible PV bracket with a span of 30 m and a cable axial force of 75 kN as the research object, we investigate the variation patterns of the support cables and wind-resistant cables under temperature decrease and increase scenarios.

WIV characteristics of a cable-supported large-span PV system were studied by wind tunnel test on aero-elastic and rigid models. The effects of module tilt angles, cable pre-tension, and wind speed on the WIV and aerodynamic damping were investigated.

Recent research indicates that the dynamic characteristics of tracking photovoltaic support system, namely inertia, damping, and stiffness, significantly influence the tracking photovoltaic support system's ability to respond to wind-induced loads, affecting its stability, reliability, and overall performance [16], [21].

Apart from fixed photovoltaic brackets, tracking photovoltaic mounting systems are widely recognized as one of the most common types of PV support. Single-axis trackers (SATs) remain the economically viable option for developers in various situations and global locations when establishing solar farms [9] , [13] .

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6 FAQs about [Photovoltaic bracket damping characteristics]

What is the damping ratio of a tracking photovoltaic support system?

Moreover, the measured damping ratios associated with each mode was low, amounting to no more than 3.0 %. Table 1. The measured natural frequency and damping ratio of a tracking photovoltaic support system at different tilt angles (Frequency /H z; Damping ratio /%). Fig. 5.

What is the modal damping ratio of a photovoltaic support system?

Additionally, consistently low modal damping ratios were measured, ranging from 1.07 % to 2.99 %. Secondly, modal analysis of the tracking photovoltaic support system was performed using ANSYS v2022 software, resulting in the determination of structural natural frequencies and mode shapes.

What are the dynamic characteristics of the tracking photovoltaic support system?

Through processing and analyzing the measured modal data of the tracking photovoltaic support system with Donghua software, the dynamic characteristic parameters of the tracking photovoltaic support system could be obtained, including frequencies, vibration modes and damping ratio.

What are the dynamic characteristics of photovoltaic support systems?

Key findings are as follows. Dynamic characteristics of tracking photovoltaic support systems obtained through field modal testing at various inclinations, revealing three torsional modes within the 2.9–5.0 Hz frequency range, accompanied by relatively small modal damping ratios ranging from 1.07 % to 2.99 %.

How to evaluate the dynamic response of tracking photovoltaic support system?

To effectively evaluate the dynamic response of tracking photovoltaic support system, it is essential to perform a tracking photovoltaic support systematic modal analysis that enables a comprehensive understanding of the inherent dynamic characteristics of the structures.

What are the characteristics of a cable-supported photovoltaic system?

Long span, light weight, strong load capacity, and adaptability to complex terrains. The nonlinear stiffness of the new cable-supported photovoltaic system is revealed. The failure mode of the new structure is discussed in detail. Dynamic characteristics and bearing capacity of the new structure are investigated.

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