ansys aqwa时域分析计算发散

时域分析总是报错（计算发散 ），修改了多次时间步长，都没用，请问能帮忙解答一下吗？

Error： YOUR TIME-STEP IS PROBABLY TOO BIG. For this time-step(0.100 secs) the natural periods of the system throughout the analysis MUST BE GREATER THAN 1.00 seconds. i.e. Frequency LESS THAN 6.283 rad/sec. PLEASE - Do NOT contact support unless you have: 1.Checked the system natural frequencies/periods. 2.Re-run with a smaller timestep. Support will require the results of these investigations BEFORE replying.