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An algorithm is proposed for optimizing the internal structure of a sample obtained by 3D printing, while maintaining the mechanical strength and rigidity. The basis is the pre-calculated stress-strain state of the sample in an elastic isotropic setting. Numerical simulation results are obtained showing the performance of the optimized design using the example of the three-point bending problem. Comparison of the results of numerical modeling, optimized and monolithic samples, in elastic isotropic formulation is presented

Аннотация. Для расчета характеристик распределенного волноводного гасителя гидродинамического шума необходимо знание величины модуля объемной упругости материала «металлическая резина» (МР) и резины с наполнителем из металлических шариков, заполняющим пространство в гасителе между податливой резиновой стенкой и жестким корпусом. В работе рассмотрен расчетноэкспериментальный метод определения модуля объемной упругости образцов МР и всего материала в волноводном гасителе. Ключевые слова: металлическая резина, гидродинамический шум, волноводный гаситель, модуль объемной упругости, частотный диапазон.

The article considers the transfer of utilization technologies for detachable elements of the launch vehicle (LV) structures during the launch at the powered phase after their detachment at the unpowered phase of the descent trajectory to the utilization of tanks for fuel and lubrication materials (FLM) delivered to outlying regions of the Arctic. Opposed to detachable LV structures, utilization of FLM tanks is carried out under ground conditions by burning fuel elements prepared from FLM tank structures in conventional boilers and domestic heating furnaces. The research task has been set considering the possibility of implementing the requirements in the design and construction of polymeric composite material (PCM) to manufacture combustible tanks for the FLM storage. The requirements have been formulated for the production stages of combustible PCM and utilization system including the definition of design and construction parameters of PCM. The results of preliminary experimental studies in terms of determining the combustibility of the proposed PCM and their strength characteristics have shown the possibility of developing combustible structures.

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