Question: Should the inertial moment of the tower cross-section be calculated using the effective thickness or the nominal thickness?

2020-03-19View Original

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Questions: 1. Should the inertial moment of the tower cross-section be calculated using effective thickness or nominal thickness? 2. When calculating higher-order vibration modes, should the mass of the attached platforms and ladders be included in the mass matrix?

Reply #22020-03-20

The self-weight of the higher-order modes is the same as that of the lower-order modes, right?

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Question: Should the inertial moment of the tower cross-section be calculated using the effective thickness or the nominal thickness?

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