## 1 Introduction  
With the advancement of technology, the impact of noise generated by aerospace equipment, deep-sea apparatus, internal vibrations of launch systems, and friction of surrounding fluid media on the concealment, reliability, and stability of systems has become increasingly critical [1]. In this context, cylindrical shell structures, as commonly employed configurations in aircraft, submarines, deep-water propulsion systems, and other structures, assume particular significance in terms of enhancing their performance. To enhance properties such as strength, rigidity, and stability of cylindrical shells, typical strategies involve the incorporation of hoop ribs or longitudinal reinforcement as primary structural forms. Consequently, research on the acoustic radiation performance of stiffened cylindrical shell structures has garnered significant attention in recent years, emerging as a prominent topic of interest. Current relevant studies primarily employ theoretical and simulation approaches. [PERSON] et al. [2] employed the finite element analysis method to simulate longitudinal stiffeners as discrete beams and compared the vibrational calculation results with those of unreinforced cylindrical shells in existing literature. Based on this comparison, they investigated the influence of shell thickness and longitudinal stiffener parameters on the acoustic radiation characteristics of the reinforced cylindrical shell structure. [PERSON] et al. [3]propose a semi-analytical method to investigate the acoustic radiation performance of periodically stiffened cylindrical shells. The study takes into account the influence of stiffener section shape and spacing on the radiated noise. [PERSON] and [PERSON] [4] establish an analytical model to investigate the acoustic radiation of submerged, elastically excited stiffened cylindrical shells. The study also takes into consideration the influence of shell impedance on acoustic radiation. [PERSON] et al. [5] employ a hybrid FE-BE method to investigate the acoustic radiation performance of stiffened cylindrical shells under broadband excitation. The study reveals that mechanical forces primarily drive the acoustic radiation at high frequencies. Furthermore, [PERSON] et al. [6] propose a hybrid analytical-numerical method for vibro-acoustic coupling, investigating the underwater acoustic radiation characteristics of stiffened cylindrical shells with localized damping. [PERSON] [7] examines the relationship between structural vibration and acoustic radiation. Using the example of a cylindrical shell structure with reinforced metal walls, the study conducts simulated analysis of its acoustic radiation characteristics. [PERSON] et al. [8] utilize a variety of hybrid methods to investigate the acoustic radiation characteristics of stiffened cylindrical shells across the entire frequency range. The study also takes into account multiple factors affecting acoustic radiation. [PERSON] et al. [9,10] investigate the radiation characteristics of longitudinally stiffened infinite cylindrical shells in water using shell theory. Furthermore, building upon this theoretical foundation, the study examines the acoustic radiation of periodically and longitudinally stiffened cylindrical shells under point force excitation. [PERSON] et al. [11] propose a refined transfer matrix method and employ simulated analysis to investigate the influence of boundary conditions and the number of ring stiffeners on the acoustic radiation of stiffened cylindrical shells. In conclusion, while certain progress has been made in the study of acoustic radiation performance of stiffened cylindrical shell structures, there has been relatively limited exploration by researchers into the integration of experimental and simulation methods to comprehensively investigate the acoustic radiation performance of reinforced sandwich cylindrical shells at mid-to-low frequencies.