When the damper exhibits degraded performance or malfunctions

resulting in asymmetric or distorted indicator diagrams

the dynamic parameter calculation method specified in the hydraulic damper standard (EN 13802) may fail to meet the necessary conditions or have calculation deficiencies. To address these issues

three implementation approaches of an equivalent algorithm are proposed from an energy perspective

and the applicability of the algorithm is studied. The research results indicate that when calculating the normal indicator diagrams

the damping values obtained from the standard and improved calculation methods exhibit consistent trends and have minimal differences in the calculated results. When calculating abnormal indicator diagrams

the applicability conditions of the equivalent algorithm are broader

and the dynamic characteristics obtained from the calculation results better align with the actual performance of the damper. The research findings address the limitations of the standard algorithm and provide more accurate input parameters for subsequent dynamic simulations.