大型回转窑筒体有限元分析及校核OA

Existing shell strength verification generally adopts a simplified model with uniform wall thickness and does not incorporate measured data on high-temperature microstructural degradation of the material,leading to significant deviations between safety assessment results and the actual service state of the equipment,which makes it difficult to support the long-term safe operation and maintenance of locally thinned shells.The rotary kiln shell of AISI253MA heat-resistant stainless steel with localized wall thickness reduction induced by service is investigated.In-situ metallographic testing is employed to quantify the σ-phase precipitation behavior and high-temperature hardness degradation law of the material under 930℃operating conditions,thereby completing the correction of high-temperature mechanical property parameters.A three-dimensional finite element model is constructed based on the measured wall thickness data of the shell and its actual operating conditions,followed by an analysis of the stress field and structural safety characteristics of the shell under the design temperature field.In accordance with GB/T 4732-2024 Standards for Analytical Design of Pressure Vessels,stress linearization verification is conducted along the cross-section of the wall thickness,verifying that the locally thinned shell meets the conditions for safe operation.The study delineates the three heating zones as the core monitoring sections of the equipment,providing quantitative evaluation criteria and engineering technical support for the hierarchical operation and maintenance management of the rotary kiln shell.The coupled analysis method of metallographic experiments and finite element simulation proposed can provide a reference for the safety assessment of high-temperature pressure-bearing rotating equipment in the petrochemical industry.